IBIC2019 - List of Keywords (controls)

Paper	Title	Other Keywords	Page
MOBO02	Beam Instrumentation at the Fermilab IOTA Ring	electron, MMI, proton, experiment	22
	N. Eddy, D.R. Broemmelsiek, K. Carlson, D.J. Crawford, J.S. Diamond, D.R. Edstrom, B.J. Fellenz, M.A. Ibrahim, J.D. Jarvis, V.A. Lebedev, S. Nagaitsev, J. Ruan, J.K. Santucci, A. Semenov, V.D. Shiltsev, G. Stancari, A. Valishev, D.C. Voy, A. Warner Fermilab, Batavia, Illinois, USA N. Kuklev, I. Lobach University of Chicago, Chicago, Illinois, USA S. Szustkowski Northern Illinois University, DeKalb, Illinois, USA
	Funding: This manuscript has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics. The Integrable Optics Test Accelerator (IOTA) is a storage ring at the end of the Fermilab Accelerator Science and Technology (FAST) facility. The complex is intended to support accelerator R&D for the next generation of particle accelerators. The IOTA ring is currently operating with 150 MeV electrons injected from the FAST Linac and will also receive 2.5 MeV protons from the IOTA Proon Injector currently be installed. The current instrumentation and results along from the first electron commissioning run will be presented along with future plans.
	Slides MOBO02 [47.588 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOBO02
About •	paper received ※ 09 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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MOPP001	Safety Classified System Using Beam Intensity Monitoring for the Respect of Nuclear Requirements of SPIRAL2 Facility	experiment, machine-protect, linac, monitoring	55
	P. Anger, C. Berthe, F. Bucaille, V. Desmezières, C.H. Haquin, C. Jamet, S. Leloir, G. Normand, JC-P. Pacary, S.P.G. Perret-Gatel, A. Savalle GANIL, Caen, France
	The SPIRAL2 Facility at GANIL is based on the construction of a superconducting ion CW LINAC (up to 5 mA - 40 MeV deuteron beams and up to 1 mA - 14.5 MeV/u heavy ion beams) with 2 experimental areas called S3 and NFS. The building, the accelerator and experimental equipment studies started in 2009. For safety classified system using beam intensity monitoring, SPIRAL2 project system engineering sets up a specific reinforced process, based on V-Model, to validate, at each step, all the requirements (technical, nuclear safety, quality, reliability, interfaces…) from the functional specifications to the final validation. Since 2016, the main part of the safety devices is installed and is currently under testing. These tests which are pre-requisites to deliver the first beam will demonstrate that both functional and safety requirements are fulfilled. This contribution will describe the requirements (operation field, limitation of equipment activation¿), the technical studies, the failure mode and effects analysis, the tests, the status and results of the SPIRAL2 Machine Protection System using AC and DC current transformers to measure and control the beam intensity.
	Poster MOPP001 [1.786 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP001
About •	paper received ※ 04 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019
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MOPP002	Current Per Bunch Distribution Measurement at ESRF	SRF, data-analysis, ECR, injection	59
	L. Torino, B. Roche, B. Vedder ESRF, Grenoble, France
	During the last run of the ESRF machine, several instrumentation improvements have been carried out in order to be exported on the new EBS storage ring. In particular, the top-up operation mode has been implemented and it demanded for an accurate, fast, and reliable measurement of the current per bunch distribution. In this proceeding, we describe the characteristics and the performance of the setup chosen to perform this measurement, which consists in a stripline, connected with a high dynamic range oscilloscope and a dedicated data analysis. We also comment on the integration of the measurement in the top-up routine to selectively refill less populated bunches.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP002
About •	paper received ※ 03 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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MOPP013	Faraday Cup Selector for DC-280 Cyclotron	diagnostics, cyclotron, beam-transport, ECR	103
	V.V. Aleinikov, S. Pachtchenko JINR, Dubna, Moscow Region, Russia K.P. Sychev, V. Zabanova JINR/FLNR, Moscow region, Russia
	New isochronous cyclotron DC-280, the basic facility of Super Heavy Element (SHE) factory was put into operation in the FLNR JINR on March 25, 2019. Key role in beam diagnostics for lossless transportation is played by Faraday cups. Five elements were installed along the two injection lines, and 12 elements on the five transport channels to the experimental facilities. The software was developed to automatically select the active Faraday cup depending on its location and track the current on a single indicator. This paper describes basic principles and algorithm of the Faraday cup Selector module which is a part of the DC-280 cyclotron control system.
	Poster MOPP013 [2.214 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP013
About •	paper received ※ 27 August 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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MOPP015	Charge Detection System for the CLARA/VELA Facility	MMI, simulation, experiment, feedback	111
	S.L. Mathisen, Y.M. Saveliev, R.J. Smith STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
	The CLARA/VELA facility at Daresbury Laboratory combines an FEL test facility and an electron accelerator for scientific and industrial applications, capable of providing up to 40 MeV electrons, with an eventual goal of 250 MeV. Accurate measurement of the bunch charges in a wide range (1 - 250 pC) at a repetition rate up to 400 Hz is required. We present a new system of analogue electronics developed to interface with existing and future bunch charge measurement devices (wall current monitors, faraday cups, etc.) to measure the bunch charges accurately and precisely. The system is based on a charge amplifier with switchable sensitivity, dark current gating and on-board self-calibration. Results of circuit simulations, offline calibration tests and online beam tests of a prototype system are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP015
About •	paper received ※ 04 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019
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MOPP019	Development and Evaluation of an Alternative Sensor Lifetime Enhancement Technique Used with the Online-Radiation-Monitoring System (DosiMon) at the European XFEL at DESY, Hamburg	radiation, FEL, operation, electron	122
	F. Schmidt-Föhre, S. Arab, D. Nölle, R. Susen DESY, Hamburg, Germany
	The European XFEL (E-XFEL), that started operation in September 2017 at the DESY/XFEL site in Hamburg/Germany uses a single-tunnel concept, forcing all frontend machine devices and electronics to be located inside the accelerator tunnel. Electro-magnetic showers, mainly produced by gun dark-current, RF cavity field-emission and beam-losses expose these devices to damaging irradiation. The new Online-Radiation-Monitoring-System (DosiMon) is mainly used for surveillance of radiation sensitive permanent magnet structures, diagnostic devices and rack-housed electronics. The integrated dose from Gamma- and optional future Neutron-radiation measurements can be monitored online by the DosiMon system. Safety limits ensure the correct function of monitored devices, provided by lifecycle estimations as measures for on time part exchange, to prevent significant radiation damage. A first expansion state currently enables more than 500 gamma measuring points. The development of a new sensor lifetime enhancement technique for the utilized RadFet sensors is presented together with corresponding evaluation measurements.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP019
About •	paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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MOPP025	Enhancements to the SNS* Differential Current Monitor to Minimize Errant Beam	cavity, ion-source, linac, high-voltage	146
	W. Blokland ORNL, Oak Ridge, Tennessee, USA C.C. Peters, T.B. Southern ORNL RAD, Oak Ridge, Tennessee, USA
	Funding: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The existing Differential Beam Current Monitor (DBCM) has been modified to not only compare beam current waveforms between upstream and downstream locations, but also to compare the previous beam current waveform with the incoming beam current waveform. When there is an unintended change in the beam current, the DBCM now aborts the beam to prevent beam loss on the next pulse. This addition has proved to be crucial to allow beam during specific front-end problems. All data is saved when an abort is issued for post-mortem analy-sis. This paper describes the additions to the implementa-tion, our operational experience, and future plans for the differential beam current monitor.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP025
About •	paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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MOPP027	First Beam-based Test of Fast Closed Orbit Feedback System at GSI SIS18	feedback, closed-orbit, acceleration, synchrotron	154
	R. Singh, A. Doring, P. Forck, K. Lang, S.H. Mirza, D. Rodomonti, D. Schupp, M. Schwickert, H. Welker GSI, Darmstadt, Germany A. Bardorfer I-Tech, Solkan, Slovenia
	Funding: European Unions Horizon 2020 Research and Innovation programme under Grant Agreement No. 730871 (ARIES). German Academic Exchange Service under Personal Reference No. 91605207. The SIS18 synchrotron of GSI will be used as a booster ring for the SIS100 synchrotron built in the scope of the FAIR project. In order to preserve the beam quality during the whole acceleration ramp, a new closed orbit feedback (COFB) system is implemented at the SIS18 which operates with the existing BPMs and steerer magnets. The system aims for a bandwidth of several 100 Hz and robustness against the variation of the response matrix and the beam rigidity during the ramp. The architecture of the system and the results of the first beam-based test of the COFB hardware are presented. As a first step, the orbit correction is performed over the entire ramp using the response matrix corresponding to injection energy only taking the beam rigidity into account. Experimental observations of the bandwidth limitations arising from the temporal delay of the steerer power supplies and the spatial model variation during the ramp are compared with simulations. It is found that the temporal and the spatial model mismatch have similar effect on the achievable bandwidth of the COFB.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP027
About •	paper received ※ 07 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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MOPP032	Fast Feedback Using Electron Beam Steering to Maintain the X-Ray Beam Position at a Monochromatic X-Ray Diagnostic at Diamond Light Source	feedback, electron, synchrotron, power-supply	172
	C. Bloomer, G. Rehm, A. Tipper DLS, Oxfordshire, United Kingdom
	A new feedback system is being developed at Diamond Light Source, applying a modulation to the position of the electron beam to keep the synchrotron X-ray beam fixed at the sample-point. Beamline detectors operating in the 100-1000Hz regime are becoming common, and the X-ray beam stability demanded by beamlines is thus of comparable bandwidths. In this paper we present a feedback system operating at these bandwidths, using a diagnostic instrument permanently installed in the X-ray beam path to measure the error in beam position at the sample point, and fast air-cored magnets to apply a small modulation to the electron beam to compensate. Four magnets are used to generate electron beam bumps through an ID straight. This modulation of the beam away from the nominal orbit is small, less than 10 microns, but should be sufficient to compensate for the bulk of the X-ray motion observed at the sample. It is small enough that the impact on the machine will be negligible. This system aims to maintain X-ray beam stability to within 3% of a beam size, at bandwidths of up to 500Hz.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP032
About •	paper received ※ 09 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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MOPP033	Preliminary Design of Mu2E Spill Regulation System (SRS)	extraction, FPGA, proton, LLRF	177
	M.A. Ibrahim, E. Cullerton, J.S. Diamond, K.S. Martin, P.S. Prieto, V.E. Scarpine, P. Varghese Fermilab, Batavia, Illinois, USA
	Funding: This work was supported by the U.S. Department of Energy under contract No. DE-AC02-07CH11359. Direct µ->e conversion requires resonant extraction of a stream of pulsed beam, comprised of short micro-bunches (pulses) from the Delivery ring (DR) to the Mu2e target. Experimental needs and radiation protection apply strict requirements on the beam quality control and regulation of the spill. The objective of the Spill Regulation System (SRS) is to maintain the intensity uniformity of a stream of ~25K pulses as 10¹² protons are extracted at 590.08kHz over a 43msec spill period. To meet the specified performance, two regulation elements will be driven simultaneously: a family of three zero-harmonic quadrupoles (tune ramp quads) and a RF Knock-Out (RFKO) system. The SRS will use two separate control loops to control each regulation element simultaneously. It will be critical to coordinate the SRS¿ processes within the machine cycle and within each spill interval. The SRS has been designed to have a total Gain-Bandwidth product of 10KHz, which can be used to mitigate several sources of ripple in the spill profile.
	Poster MOPP033 [0.522 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP033
About •	paper received ※ 30 August 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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TUPP003	A Common Diagnostic Platform for Elettra 2.0 and FERMI	cavity, FPGA, diagnostics, Ethernet	280
	G. Brajnik, S. Cleva, R. De Monte, D. Giuressi Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	Elettra 2.0 is the project of upgrading the current synchrotron light source to a low emittance machine. In this framework, various components of diagnostics have to be refurbished due to the obsolescence of the same or due to the tight requirements of the new accelerator. In this paper we present a high performance FPGA-based (Altera/Intel Arria 10) digital board developed internally, capable of hosting two FMC modules, equipped with DDR3 ram and 10 Gb/s Ethernet links. The presence of the FMC connectors allows a flexible use of the board: various configurations of A/D and D/A converters (different number of channels, resolution, sampling rate) can be obtained, also with various I/O ports for trigger and synchronisation. These features make it applicable as a base platform for various applications not only for Elettra (electron and photon BPMs, DLLRF systems, etc.) but also for Fermi (cavity BPMs, bunch arrival monitor, link stabiliser). The peripherals on board have been fully debugged, and probably a new version with a SoC (System on Chip) will be released in the next future.
	Poster TUPP003 [1.586 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP003
About •	paper received ※ 02 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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TUPP005	PLC Based Flexible and Scalable Vacuum Control at the Argonne Tandem Linear Accelerator System (ATLAS)	vacuum, PLC, ECR, status	285
	Y. Luo, D.G. Bilbrough, C. Dickerson, A.E. Germain, M.R. Hendricks, C.E. Peters, S.I. Sharamentov ANL, Lemont, Illinois, USA
	Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357. This research used resources of ANL¿s ATLAS facility, a DOE Office. The beamline sections of an accelerator and different ion sources require a vacuum system capable of providing pressures down to 10^-10 Torr. To control, monitor, and provide interlock protection of the vacuum equipment, a PLC-based vacuum control system was developed and tested at the Argonne Tandem Linear Accelerator (ATLAS). This system was designed to be highly flexible and scalable to meet the variety of equipment and configurations at ATLAS. The current FGPA-based system is reliable and fast, but is very difficult to maintain and upgrade. Particular attention was paid to the signal distribution to promote standard cable connections, minimize the usage of terminal blocks, and reduce the time to troubleshoot problematic channels. The system monitors the status of fast acting relays for interlock or control purposes, and utilizes RS-485 communication to gather lower priority information such as pump speeds or vacuum pressure readouts. The vacuum levels are monitored to interlock the high voltages of some beam instruments to protect against sparks as the Paschen minimum is approached. This paper mainly presents work on hardware interface to various vacuum devices.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP005
About •	paper received ※ 30 August 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019
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TUPP015	Wire Scanner Diagnostic System	software, diagnostics, ion-source, hardware	326
	S. Grulja, S. Cleva, R. De Monte, M. Ferianis Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	Elettra Sincrotrone Trieste Research Center (Elettra) is one of the Italian Institutions, together with Istituto Nazionale di Fisica Nucleare (INFN) and Consiglio Nazionale delle Ricerche (CNR), committed to the realization of the Italian in-kind contributions for the European Spallation Source. One part of the Elettra in-kind contributions to the proton accelerator is the construction of acquisition system for ESS Wire Scanner (WS).This paper presents an overview of the diagnostic system of the ESS Wire Scanner, including the first measurements with beam performed at CERN on LINAC4.
	Poster TUPP015 [7.121 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP015
About •	paper received ※ 04 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019
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TUPP016	Beam Profile Monitors for the CNAO Experimental Line	detector, experiment, proton, electron	328
	C. Viviani, G.M.A. Calvi, L. Lanzavecchia, M. Manzini, A. Parravicini, E. Rojatti CNAO Foundation, Milan, Italy
	The CNAO (Centro Nazionale di Adroterapia Oncologica) Foundation is the first Italian center for deep hadrontherapy. Since 2011, more than 2000 patients have been treated using Protons and Carbon ions. During the last 3 years an experimental line for research purposes has been built. The experimental line is equipped with three Scintillating Fibers with Photodiode array (SFP) detectors. The SFP is a profile and position monitor, whose sensitive part is made up of two harps of scintillating fibers. Each fiber is readout by a cell of a photodiode array. The SFP has been developed from the Scintillating Fibers Harp (SFH) detector, the monitor presently installed along the CNAO extraction lines. The passage to the SFP results in a significant advantage in terms of cost, dimension, acquisition rate speed and flexibility. On 19th May 2019 the first beam was extracted in the CNAO experimental room and first in line beam measurement was performed with the SFP. The present work describes the SFP detectors, their achieved performances and the results obtained by means of the most recent beam measurements, performed during experimental line commissioning.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP016
About •	paper received ※ 03 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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TUPP033	Laboratory and Beam Based Studies for Assessing the Performance of the New Fast Wire Scanners for the CERN Injector Complex	feedback, laser, operation, vacuum	392
	J. Emery, P. Andersson, W. Andreazza, J.M. Fernandez Ochoa, A. Goldblatt, D. Gudkov, F. Roncarolo, J.L. Sirvent, J. Tassan-Viol, R. Veness CERN, Geneva, Switzerland
	At CERN, fast beam wire scanners serve as reference transverse profile monitors in all synchrotrons. As part of the LHC Injector Upgrade project, a new generation of scanners has been designed to improve system reliability, precision and accuracy in view of higher brightness beams. This paper will discuss the performance achieved during both laboratory calibration and prototype testing with beam. The beam measurements performed in 2018 demonstrated excellent system reliability and reproducibility, while calibration in the laboratory showed that an accuracy below 10 um can be achieved on the wire position determination.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP033
About •	paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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TUPP040	Digital Cameras for Photon Diagnostics at the Advanced Photon Source	damping, injection, detector, diagnostics	425
	K.P. Wootton, N.D. Arnold, W. Berg, T. Fors, N. Sereno, H. Shang, G. Shen, S.E. Shoaf, B.X. Yang ANL, Lemont, Illinois, USA
	Funding: This research used resources of the Advanced Photon Source, operated for the U.S. Department of Energy Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. Cameras can be a very useful accelerator diagnostic, particularly because an image of the beam distribution can be quickly interpreted by human operators, and increasingly can serve as an input to machine learning algorithms. We present an implementation of digital cameras for triggered photon diagnostics at the Advanced Photon Source using the areaDetector framework in the Experimental Physics and Industrial Controls System. Beam size measurements from the synchrotron light monitors in the Particle Accumulator Ring using the new architecture are presented.
	Poster TUPP040 [0.708 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP040
About •	paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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TUPP043	Fast and Robust Wire Scanners with Novel Materials for Profiling High Intensity Beams	operation, detector, diagnostics, laser	436
	G. Andonian, T.J. Campese, A. Laurich, M. Ruelas RadiaBeam, Marina del Rey, California, USA G. Andonian, J.K. Penney UCLA, Los Angeles, California, USA J. Gubeli, K. Jordan, J. Yan JLab, Newport News, Virginia, USA C.F. Huff, L.R. Scammell, R.R. Whitney BNNT, LLC, Newport News, USA
	Wire scanners are robust devices for beam characterization in accelerator facilities. However, prolonged usage with intense particle beams leads to wire damage, requiring replacement and beam diagnostic downtime. The fast, robust wire scanner was recently designed and engineered with swappable and modular wire cards, that can accommodate different wire materials under tension. Testing is currently underway at the Jefferson Laboratory (JLab) Low Energy Recirculating Facility. During the course of the diagnostic development and commissioning, we will test Tungsten, Carbon, and boron-nitride nanotube in wire form. The latter is particularly relevant as early results on the material show that it has very high thermal thresholds and may withstand the high-power of the beam during regular operations. This paper will report on the system design and engineering, and preliminary results with operation on the beamline.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP043
About •	paper received ※ 05 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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WEBO02	MicroTCA.4 at Sirius and a Closer Look into the Community	hardware, electron, electronics, LLRF	461
	D.O. Tavares, G.B.M. Bruno, S.R. Marques, L.M. Russo, H.A. Silva LNLS, Campinas, Brazil
	More and more facilities have been adopting MicroTCA.4 as the standard for new electronics. Despite the advertised advantages in terms of system manageability, high availability, backplane performance and supply of high quality COTS modules by industry, the standard still lacks a greater acceptance in the accelerators community. This paper reports on the deployment of MicroTCA.4 systems at Sirius light source, which comprised the development and manufacturing of several open hardware modules, development of a generic gateware/software framework and re-implementation of MMC IPMI firmware as an open source project. A special focus will be given to the difficulties found, unforeseen expansions of the system and general architectural aspects. Based on this experience and on a survey carried out among other MicroTCA.4 adopters, the perceived strengths and weaknesses of the standard will be discussed and a tentative outlook on how it could be evolved to better suit the accelerators community will be presented.
	Slides WEBO02 [34.322 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEBO02
About •	paper received ※ 05 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019
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WEBO04	Enhancement of the S-DALINAC Control System with Machine Learning Methods	network, target, linac, electron	475
	J.H. Hanten, M. Arnold, J. Birkhan, C. Caliari, N. Pietralla, M. Steinhorst TU Darmstadt, Darmstadt, Germany
	Funding: Work supported by DFG through GRK 2128 For the EPICS-based control system of the superconducting Darmstadt electron linear accelerator S-DALINAC, supporting infrastructures based on machine learning are currently developed. The most important support for the operators is to assist the beam setup and controlling with reinforcement learning using artificial neural networks. A particle accelerator has a very large parameter space with often hidden relationships between them. Therefore neural networks are a suited instrument to use for approximating the needed value function which represents the value of a certain action in a certain state. Different neural network structures and their training with reinforcement learning are currently tested with simulations. Also there are different candidates for the reinforcement learning algorithms such as Deep-Q-Networks (DQN) or Deep-Deterministic-Policy-Gradient (DDPG). In this contribution the concept and first results will be presented. *N. Pietralla, Nuclear Physics News, Vol. 28, No.2, 4 (2018)
	Slides WEBO04 [2.073 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEBO04
About •	paper received ※ 03 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019
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WECO01	Characterisation of Closed Orbit Feedback Systems	feedback, synchrotron, electron, hadron	479
	G. Rehm DLS, Oxfordshire, United Kingdom
	Closed orbit feedback is applied at nearly all synchrotrons. Detailed investigations continue to be performed on the mathematical modelling of the spatial part (i.e. related to Orbit Response Matrix) and the dynamic part (i.e. the controller). This talk will serve as a summary of the ARIES workshop on closed orbit feedback organized by ALBA in November 2018. Benefits of recent advances compared to the traditional implementations will be highlighted.
	Slides WECO01 [4.912 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WECO01
About •	paper received ※ 06 September 2019 paper accepted ※ 20 November 2019 issue date ※ 10 November 2019
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WEPP015	ESS Beam Position and Phase Monitor System	electronics, electron, linac, FPGA	543
	R.A. Baron, H. Hassanzadegan, A. Jansson, H. Kocevar, K.E. Rosengren, T.J. Shea ESS, Lund, Sweden I. Bustinduy, S. Varnasseri ESS Bilbao, Zamudio, Spain F. Grespan, M. Poggi INFN/LNL, Legnaro (PD), Italy T. Gräber DESY Zeuthen, Zeuthen, Germany D. Lipka, S. Vilcins DESY, Hamburg, Germany
	The European Spallation Source (ESS) is a neutron facility under construction in Lund, Sweden, and established as an European collaboration between different member countries. The machine is a 2 GeV proton LINAC with a nominal beam current of 62.5 mA, 2.86 ms of pulse length and a bunch repetition rate of 352 MHz. The Beam Position and Phase Monitors (BPM) at ESS were designed to satisfy the specifications for the different beam modes, which span from 5 µs pulse length and 6.3 mA beam until the nominal beam condition. The system is designed for standard beam position measurements for beam trajectory correction and for beam phase measurements for cavity phase tuning, imposing restrictions on the sensor design and electronics architecture. Approximately a hundred BPM’s were manufactured and are being installed by partners in collaboration with ESS. The BPM system comprises a MicroTCA.4 electronics based in COTS AMC and RTM modules with custom FPGA firmware implementation and a custom Front-End electronics. In this work, the system architecture, implementation, performance, and test results are presented and discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP015
About •	paper received ※ 04 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019
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WEPP016	Real-Time Synchronized Calibration and Computing System with EPICS Based Distributed Controls in the TPS XBPM System	EPICS, photon, distributed, synchrotron	548
	J.-Y. Chuang, C.K. Chan, C.-C. Chang, C.M. Cheng, Y.T. Cheng, Y.M. Hsiao, Y.Z. Lin, Y.-C. Liu, C. Shueh, Y.C. Yang NSRRC, Hsinchu, Taiwan
	In synchrotron facilities, X-ray beam position monitor (XBPM) is an important detector for photon beam position monitoring and must be calibrated to ensure reliability and precision. However, light source operating conditions, such as beam orbit, injection and insertion device parameters, etc., can influence the sensitivity and specific weighting of photoemission current from the XBPM diamond blades. In the Taiwan Photon Source (TPS), Experimental Physics and Industrial Control System (EPICS) was utilized to implant an automatic calibration process. By using EPICS, we can ensure a seamless integration between the different front ends (FEs) and direct all data stream into a centralized server, creating a distributed XBPM calibration system. The XBPM performance indicators are analyzed to evaluate the validity of calibration parameters by input/ output controller (IOC) in each FE computing system. This paper will discuss the benefits of implanting this distributed control system into a working environment such as the TPS. XBPM, TPS, Front end, Distributed XBPM calibration system
	Poster WEPP016 [0.843 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP016
About •	paper received ※ 01 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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WEPP020	First results on Femtosecond Level Photocathode Laser Synchronization at the SINBAD Facility	laser, timing, electron, linac	564
	M. Titberidze, M. Felber, T. Kozak, T. Lamb, J. Müller, H. Schlarb, S. Schulz, C. Sydlo, F. Zummack DESY, Hamburg, Germany
	SINBAD, the "short-innovative bunches and accelerators at DESY" is an accelerator research and development facility which will host various experiments. SINBAD-ARES linac is a conventional S-band linear accelerator which will be capable of producing ultra-short electron bunches with duration of few femtoseconds and energy of up to 100 MeV. In order to fully utilize the potential of ultra-short electron bunches while probing the novel acceleration techniques (e.g. external injection in LWFA), it is crucial to achieve femtosecond level synchronization between photocathode laser and RF source driving the RF gun of the ARES linac. In this paper we present the first results on the synchronization of the near-infrared photocathode laser to the RF source with the residual timing jitter performance of ~10 fs rms. These results were obtained using a conventional laser-to-RF synchronization setup employing heterodyne detection of an RF signal generated by impinging the laser pulses to a fast photodetector. In addition, we describe an advanced laser-to-RF phase detection scheme as a future upgrade; promising even lower timing jitter and most importantly the long-term timing drift stability.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP020
About •	paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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WEPP042	Measurement of the Second Moments of Transverse Beam Distribution with Solenoid Scan	electron, emittance, solenoid, experiment	642
	I. Pinayev BNL, Upton, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. Measurement of the dependence of the beam size on profile monitor vs. strength of a focusing element is widely used for measurement of the beam parameters. Such measurements are mostly used for the separate planes and assumption that beam satisfied Gaussian distribution. In many linear accelerators the transverse beam dynamics is coupled between planes and distribution is far from the Gaussian. We developed measurement technique of the second moments of beam distribution which does not rely on any assumptions. The theory and experimental results are presented.
	Poster WEPP042 [1.756 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP042
About •	paper received ※ 03 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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WEPP045	Development of an Automated BPM Test Bench	linac, instrumentation, diagnostics, beam-diagnostic	651
	M. Schwarz, H. Podlech IAP, Frankfurt am Main, Germany H. Höltermann, B. Koubek, U. Ratzinger, W. Schweizer, D. Strehl, C. Trageser BEVATECH, Frankfurt, Germany
	The Institute for Applied Physics (IAP) of Goethe University Frankfurt has a long history in developing DTL-cavities and further essential components of particle accelerators from design and simulation up to tuning and final testing. In recent times, the development of beam diagnostic components for the hadron accelerator projects has become increasingly important. Bevatech is designing and setting up linear accelerators, RF and vacuum technology for research laboratories and enterprises worldwide. In a joint effort a simple, efficient and mobile beam position monitor (BPM) test bench has been developed and will be further improved for future tests and the calibration of beam position monitors. It is fully automated using single-board computers and microcontrollers to obtain the essential calibration data like electrical offset, button sensitivity and the 2D response map. In addition, initial tests with the implementation and evaluation of the Libera signal processing units Single Pass H and Spark were promising.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP045
About •	paper received ※ 03 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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WEPP046	Technology and First Beam Tests of the New CERN-SPS Beam Position System	electronics, electron, pick-up, radiation	655
	M. Wendt, M. Barros Marin, A. Boccardi, T.B. Bogey, I. Degl’Innocenti, A. Topaloudis CERN, Meyrin, Switzerland
	The CERN Super Proton Synchrotron (SPS) uses 215 beam position monitors (BPMs) to observe the beam orbit when accelerating protons or ions on a fast ramp cycle to beam energies of up to 450 GeV/c. In the frame of the CERN LHC Injector Upgrade (LIU) initiative the aged, and diffi- cult to maintain homodyne-receiver based BPM read-out system is currently being upgraded with A Logarithmic Po- sition System ¿ ALPS. As the name indicates, this new BPM electronics builds upon the experience at CERN with using logarithmic detector amplifiers for beam position processing, and is well suited to cover the large range of beam intensities accelerated in the SPS. The system will use radiation toler- ant electronics located in close proximity to the split-plane or stripline beam position monitor with GB/s optical data transmission to the processing electronics located on the surface. Technical details of the analog and digital signal processing, the data transmission using optical fibers, cal- ibration and testing, as well as first beam tests on a set of ALPS prototypes are presented in this paper.
	Poster WEPP046 [16.711 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP046
About •	paper received ※ 06 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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Paper

Title

Other Keywords

Page

MOBO02

Beam Instrumentation at the Fermilab IOTA Ring

electron, MMI, proton, experiment

22

N. Eddy, D.R. Broemmelsiek, K. Carlson, D.J. Crawford, J.S. Diamond, D.R. Edstrom, B.J. Fellenz, M.A. Ibrahim, J.D. Jarvis, V.A. Lebedev, S. Nagaitsev, J. Ruan, J.K. Santucci, A. Semenov, V.D. Shiltsev, G. Stancari, A. Valishev, D.C. Voy, A. Warner
Fermilab, Batavia, Illinois, USA
N. Kuklev, I. Lobach
University of Chicago, Chicago, Illinois, USA
S. Szustkowski
Northern Illinois University, DeKalb, Illinois, USA

Funding: This manuscript has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics.
The Integrable Optics Test Accelerator (IOTA) is a storage ring at the end of the Fermilab Accelerator Science and Technology (FAST) facility. The complex is intended to support accelerator R&D for the next generation of particle accelerators. The IOTA ring is currently operating with 150 MeV electrons injected from the FAST Linac and will also receive 2.5 MeV protons from the IOTA Proon Injector currently be installed. The current instrumentation and results along from the first electron commissioning run will be presented along with future plans.

Slides MOBO02 [47.588 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOBO02

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paper received ※ 09 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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MOPP001

Safety Classified System Using Beam Intensity Monitoring for the Respect of Nuclear Requirements of SPIRAL2 Facility

experiment, machine-protect, linac, monitoring

55

P. Anger, C. Berthe, F. Bucaille, V. Desmezières, C.H. Haquin, C. Jamet, S. Leloir, G. Normand, JC-P. Pacary, S.P.G. Perret-Gatel, A. Savalle
GANIL, Caen, France

The SPIRAL2 Facility at GANIL is based on the construction of a superconducting ion CW LINAC (up to 5 mA - 40 MeV deuteron beams and up to 1 mA - 14.5 MeV/u heavy ion beams) with 2 experimental areas called S3 and NFS. The building, the accelerator and experimental equipment studies started in 2009. For safety classified system using beam intensity monitoring, SPIRAL2 project system engineering sets up a specific reinforced process, based on V-Model, to validate, at each step, all the requirements (technical, nuclear safety, quality, reliability, interfaces…) from the functional specifications to the final validation. Since 2016, the main part of the safety devices is installed and is currently under testing. These tests which are pre-requisites to deliver the first beam will demonstrate that both functional and safety requirements are fulfilled. This contribution will describe the requirements (operation field, limitation of equipment activation¿), the technical studies, the failure mode and effects analysis, the tests, the status and results of the SPIRAL2 Machine Protection System using AC and DC current transformers to measure and control the beam intensity.

Poster MOPP001 [1.786 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP001

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paper received ※ 04 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019

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MOPP002

Current Per Bunch Distribution Measurement at ESRF

SRF, data-analysis, ECR, injection

59

L. Torino, B. Roche, B. Vedder
ESRF, Grenoble, France

During the last run of the ESRF machine, several instrumentation improvements have been carried out in order to be exported on the new EBS storage ring. In particular, the top-up operation mode has been implemented and it demanded for an accurate, fast, and reliable measurement of the current per bunch distribution. In this proceeding, we describe the characteristics and the performance of the setup chosen to perform this measurement, which consists in a stripline, connected with a high dynamic range oscilloscope and a dedicated data analysis. We also comment on the integration of the measurement in the top-up routine to selectively refill less populated bunches.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP002

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paper received ※ 03 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019

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MOPP013

Faraday Cup Selector for DC-280 Cyclotron

diagnostics, cyclotron, beam-transport, ECR

103

V.V. Aleinikov, S. Pachtchenko
JINR, Dubna, Moscow Region, Russia
K.P. Sychev, V. Zabanova
JINR/FLNR, Moscow region, Russia

New isochronous cyclotron DC-280, the basic facility of Super Heavy Element (SHE) factory was put into operation in the FLNR JINR on March 25, 2019. Key role in beam diagnostics for lossless transportation is played by Faraday cups. Five elements were installed along the two injection lines, and 12 elements on the five transport channels to the experimental facilities. The software was developed to automatically select the active Faraday cup depending on its location and track the current on a single indicator. This paper describes basic principles and algorithm of the Faraday cup Selector module which is a part of the DC-280 cyclotron control system.

Poster MOPP013 [2.214 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP013

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paper received ※ 27 August 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019

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MOPP015

Charge Detection System for the CLARA/VELA Facility

MMI, simulation, experiment, feedback

111

S.L. Mathisen, Y.M. Saveliev, R.J. Smith
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom

The CLARA/VELA facility at Daresbury Laboratory combines an FEL test facility and an electron accelerator for scientific and industrial applications, capable of providing up to 40 MeV electrons, with an eventual goal of 250 MeV. Accurate measurement of the bunch charges in a wide range (1 - 250 pC) at a repetition rate up to 400 Hz is required. We present a new system of analogue electronics developed to interface with existing and future bunch charge measurement devices (wall current monitors, faraday cups, etc.) to measure the bunch charges accurately and precisely. The system is based on a charge amplifier with switchable sensitivity, dark current gating and on-board self-calibration. Results of circuit simulations, offline calibration tests and online beam tests of a prototype system are presented.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP015

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paper received ※ 04 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019

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MOPP019

Development and Evaluation of an Alternative Sensor Lifetime Enhancement Technique Used with the Online-Radiation-Monitoring System (DosiMon) at the European XFEL at DESY, Hamburg

radiation, FEL, operation, electron

122

F. Schmidt-Föhre, S. Arab, D. Nölle, R. Susen
DESY, Hamburg, Germany

The European XFEL (E-XFEL), that started operation in September 2017 at the DESY/XFEL site in Hamburg/Germany uses a single-tunnel concept, forcing all frontend machine devices and electronics to be located inside the accelerator tunnel. Electro-magnetic showers, mainly produced by gun dark-current, RF cavity field-emission and beam-losses expose these devices to damaging irradiation. The new Online-Radiation-Monitoring-System (DosiMon) is mainly used for surveillance of radiation sensitive permanent magnet structures, diagnostic devices and rack-housed electronics. The integrated dose from Gamma- and optional future Neutron-radiation measurements can be monitored online by the DosiMon system. Safety limits ensure the correct function of monitored devices, provided by lifecycle estimations as measures for on time part exchange, to prevent significant radiation damage. A first expansion state currently enables more than 500 gamma measuring points. The development of a new sensor lifetime enhancement technique for the utilized RadFet sensors is presented together with corresponding evaluation measurements.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP019

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paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019

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MOPP025

Enhancements to the SNS* Differential Current Monitor to Minimize Errant Beam

cavity, ion-source, linac, high-voltage

146

W. Blokland
ORNL, Oak Ridge, Tennessee, USA
C.C. Peters, T.B. Southern
ORNL RAD, Oak Ridge, Tennessee, USA

Funding: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy.
The existing Differential Beam Current Monitor (DBCM) has been modified to not only compare beam current waveforms between upstream and downstream locations, but also to compare the previous beam current waveform with the incoming beam current waveform. When there is an unintended change in the beam current, the DBCM now aborts the beam to prevent beam loss on the next pulse. This addition has proved to be crucial to allow beam during specific front-end problems. All data is saved when an abort is issued for post-mortem analy-sis. This paper describes the additions to the implementa-tion, our operational experience, and future plans for the differential beam current monitor.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP025

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paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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MOPP027

First Beam-based Test of Fast Closed Orbit Feedback System at GSI SIS18

feedback, closed-orbit, acceleration, synchrotron

154

R. Singh, A. Doring, P. Forck, K. Lang, S.H. Mirza, D. Rodomonti, D. Schupp, M. Schwickert, H. Welker
GSI, Darmstadt, Germany
A. Bardorfer
I-Tech, Solkan, Slovenia

Funding: European Unions Horizon 2020 Research and Innovation programme under Grant Agreement No. 730871 (ARIES). German Academic Exchange Service under Personal Reference No. 91605207.
The SIS18 synchrotron of GSI will be used as a booster ring for the SIS100 synchrotron built in the scope of the FAIR project. In order to preserve the beam quality during the whole acceleration ramp, a new closed orbit feedback (COFB) system is implemented at the SIS18 which operates with the existing BPMs and steerer magnets. The system aims for a bandwidth of several 100 Hz and robustness against the variation of the response matrix and the beam rigidity during the ramp. The architecture of the system and the results of the first beam-based test of the COFB hardware are presented. As a first step, the orbit correction is performed over the entire ramp using the response matrix corresponding to injection energy only taking the beam rigidity into account. Experimental observations of the bandwidth limitations arising from the temporal delay of the steerer power supplies and the spatial model variation during the ramp are compared with simulations. It is found that the temporal and the spatial model mismatch have similar effect on the achievable bandwidth of the COFB.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP027

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paper received ※ 07 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019

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MOPP032

Fast Feedback Using Electron Beam Steering to Maintain the X-Ray Beam Position at a Monochromatic X-Ray Diagnostic at Diamond Light Source

feedback, electron, synchrotron, power-supply

172

C. Bloomer, G. Rehm, A. Tipper
DLS, Oxfordshire, United Kingdom

A new feedback system is being developed at Diamond Light Source, applying a modulation to the position of the electron beam to keep the synchrotron X-ray beam fixed at the sample-point. Beamline detectors operating in the 100-1000Hz regime are becoming common, and the X-ray beam stability demanded by beamlines is thus of comparable bandwidths. In this paper we present a feedback system operating at these bandwidths, using a diagnostic instrument permanently installed in the X-ray beam path to measure the error in beam position at the sample point, and fast air-cored magnets to apply a small modulation to the electron beam to compensate. Four magnets are used to generate electron beam bumps through an ID straight. This modulation of the beam away from the nominal orbit is small, less than 10 microns, but should be sufficient to compensate for the bulk of the X-ray motion observed at the sample. It is small enough that the impact on the machine will be negligible. This system aims to maintain X-ray beam stability to within 3% of a beam size, at bandwidths of up to 500Hz.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP032

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paper received ※ 09 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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MOPP033

Preliminary Design of Mu2E Spill Regulation System (SRS)

extraction, FPGA, proton, LLRF

177

M.A. Ibrahim, E. Cullerton, J.S. Diamond, K.S. Martin, P.S. Prieto, V.E. Scarpine, P. Varghese
Fermilab, Batavia, Illinois, USA

Funding: This work was supported by the U.S. Department of Energy under contract No. DE-AC02-07CH11359.
Direct µ->e conversion requires resonant extraction of a stream of pulsed beam, comprised of short micro-bunches (pulses) from the Delivery ring (DR) to the Mu2e target. Experimental needs and radiation protection apply strict requirements on the beam quality control and regulation of the spill. The objective of the Spill Regulation System (SRS) is to maintain the intensity uniformity of a stream of ~25K pulses as 10¹² protons are extracted at 590.08kHz over a 43msec spill period. To meet the specified performance, two regulation elements will be driven simultaneously: a family of three zero-harmonic quadrupoles (tune ramp quads) and a RF Knock-Out (RFKO) system. The SRS will use two separate control loops to control each regulation element simultaneously. It will be critical to coordinate the SRS¿ processes within the machine cycle and within each spill interval. The SRS has been designed to have a total Gain-Bandwidth product of 10KHz, which can be used to mitigate several sources of ripple in the spill profile.

Poster MOPP033 [0.522 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP033

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paper received ※ 30 August 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019

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TUPP003

A Common Diagnostic Platform for Elettra 2.0 and FERMI

cavity, FPGA, diagnostics, Ethernet

280

G. Brajnik, S. Cleva, R. De Monte, D. Giuressi
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

Elettra 2.0 is the project of upgrading the current synchrotron light source to a low emittance machine. In this framework, various components of diagnostics have to be refurbished due to the obsolescence of the same or due to the tight requirements of the new accelerator. In this paper we present a high performance FPGA-based (Altera/Intel Arria 10) digital board developed internally, capable of hosting two FMC modules, equipped with DDR3 ram and 10 Gb/s Ethernet links. The presence of the FMC connectors allows a flexible use of the board: various configurations of A/D and D/A converters (different number of channels, resolution, sampling rate) can be obtained, also with various I/O ports for trigger and synchronisation. These features make it applicable as a base platform for various applications not only for Elettra (electron and photon BPMs, DLLRF systems, etc.) but also for Fermi (cavity BPMs, bunch arrival monitor, link stabiliser). The peripherals on board have been fully debugged, and probably a new version with a SoC (System on Chip) will be released in the next future.

Poster TUPP003 [1.586 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP003

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paper received ※ 02 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019

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TUPP005

PLC Based Flexible and Scalable Vacuum Control at the Argonne Tandem Linear Accelerator System (ATLAS)

vacuum, PLC, ECR, status

285

Y. Luo, D.G. Bilbrough, C. Dickerson, A.E. Germain, M.R. Hendricks, C.E. Peters, S.I. Sharamentov
ANL, Lemont, Illinois, USA

Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357. This research used resources of ANL¿s ATLAS facility, a DOE Office.
The beamline sections of an accelerator and different ion sources require a vacuum system capable of providing pressures down to 10^-10 Torr. To control, monitor, and provide interlock protection of the vacuum equipment, a PLC-based vacuum control system was developed and tested at the Argonne Tandem Linear Accelerator (ATLAS). This system was designed to be highly flexible and scalable to meet the variety of equipment and configurations at ATLAS. The current FGPA-based system is reliable and fast, but is very difficult to maintain and upgrade. Particular attention was paid to the signal distribution to promote standard cable connections, minimize the usage of terminal blocks, and reduce the time to troubleshoot problematic channels. The system monitors the status of fast acting relays for interlock or control purposes, and utilizes RS-485 communication to gather lower priority information such as pump speeds or vacuum pressure readouts. The vacuum levels are monitored to interlock the high voltages of some beam instruments to protect against sparks as the Paschen minimum is approached. This paper mainly presents work on hardware interface to various vacuum devices.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP005

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paper received ※ 30 August 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019

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TUPP015

Wire Scanner Diagnostic System

software, diagnostics, ion-source, hardware

326

S. Grulja, S. Cleva, R. De Monte, M. Ferianis
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

Elettra Sincrotrone Trieste Research Center (Elettra) is one of the Italian Institutions, together with Istituto Nazionale di Fisica Nucleare (INFN) and Consiglio Nazionale delle Ricerche (CNR), committed to the realization of the Italian in-kind contributions for the European Spallation Source. One part of the Elettra in-kind contributions to the proton accelerator is the construction of acquisition system for ESS Wire Scanner (WS).This paper presents an overview of the diagnostic system of the ESS Wire Scanner, including the first measurements with beam performed at CERN on LINAC4.

Poster TUPP015 [7.121 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP015

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paper received ※ 04 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019

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TUPP016

Beam Profile Monitors for the CNAO Experimental Line

detector, experiment, proton, electron

328

C. Viviani, G.M.A. Calvi, L. Lanzavecchia, M. Manzini, A. Parravicini, E. Rojatti
CNAO Foundation, Milan, Italy

The CNAO (Centro Nazionale di Adroterapia Oncologica) Foundation is the first Italian center for deep hadrontherapy. Since 2011, more than 2000 patients have been treated using Protons and Carbon ions. During the last 3 years an experimental line for research purposes has been built. The experimental line is equipped with three Scintillating Fibers with Photodiode array (SFP) detectors. The SFP is a profile and position monitor, whose sensitive part is made up of two harps of scintillating fibers. Each fiber is readout by a cell of a photodiode array. The SFP has been developed from the Scintillating Fibers Harp (SFH) detector, the monitor presently installed along the CNAO extraction lines. The passage to the SFP results in a significant advantage in terms of cost, dimension, acquisition rate speed and flexibility. On 19th May 2019 the first beam was extracted in the CNAO experimental room and first in line beam measurement was performed with the SFP. The present work describes the SFP detectors, their achieved performances and the results obtained by means of the most recent beam measurements, performed during experimental line commissioning.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP016

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paper received ※ 03 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019

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TUPP033

Laboratory and Beam Based Studies for Assessing the Performance of the New Fast Wire Scanners for the CERN Injector Complex

feedback, laser, operation, vacuum

392

J. Emery, P. Andersson, W. Andreazza, J.M. Fernandez Ochoa, A. Goldblatt, D. Gudkov, F. Roncarolo, J.L. Sirvent, J. Tassan-Viol, R. Veness
CERN, Geneva, Switzerland

At CERN, fast beam wire scanners serve as reference transverse profile monitors in all synchrotrons. As part of the LHC Injector Upgrade project, a new generation of scanners has been designed to improve system reliability, precision and accuracy in view of higher brightness beams. This paper will discuss the performance achieved during both laboratory calibration and prototype testing with beam. The beam measurements performed in 2018 demonstrated excellent system reliability and reproducibility, while calibration in the laboratory showed that an accuracy below 10 um can be achieved on the wire position determination.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP033

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paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019

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TUPP040

Digital Cameras for Photon Diagnostics at the Advanced Photon Source

damping, injection, detector, diagnostics

425

K.P. Wootton, N.D. Arnold, W. Berg, T. Fors, N. Sereno, H. Shang, G. Shen, S.E. Shoaf, B.X. Yang
ANL, Lemont, Illinois, USA

Funding: This research used resources of the Advanced Photon Source, operated for the U.S. Department of Energy Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
Cameras can be a very useful accelerator diagnostic, particularly because an image of the beam distribution can be quickly interpreted by human operators, and increasingly can serve as an input to machine learning algorithms. We present an implementation of digital cameras for triggered photon diagnostics at the Advanced Photon Source using the areaDetector framework in the Experimental Physics and Industrial Controls System. Beam size measurements from the synchrotron light monitors in the Particle Accumulator Ring using the new architecture are presented.

Poster TUPP040 [0.708 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP040

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paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019

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TUPP043

Fast and Robust Wire Scanners with Novel Materials for Profiling High Intensity Beams

operation, detector, diagnostics, laser

436

G. Andonian, T.J. Campese, A. Laurich, M. Ruelas
RadiaBeam, Marina del Rey, California, USA
G. Andonian, J.K. Penney
UCLA, Los Angeles, California, USA
J. Gubeli, K. Jordan, J. Yan
JLab, Newport News, Virginia, USA
C.F. Huff, L.R. Scammell, R.R. Whitney
BNNT, LLC, Newport News, USA

Wire scanners are robust devices for beam characterization in accelerator facilities. However, prolonged usage with intense particle beams leads to wire damage, requiring replacement and beam diagnostic downtime. The fast, robust wire scanner was recently designed and engineered with swappable and modular wire cards, that can accommodate different wire materials under tension. Testing is currently underway at the Jefferson Laboratory (JLab) Low Energy Recirculating Facility. During the course of the diagnostic development and commissioning, we will test Tungsten, Carbon, and boron-nitride nanotube in wire form. The latter is particularly relevant as early results on the material show that it has very high thermal thresholds and may withstand the high-power of the beam during regular operations. This paper will report on the system design and engineering, and preliminary results with operation on the beamline.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP043

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paper received ※ 05 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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WEBO02

MicroTCA.4 at Sirius and a Closer Look into the Community

hardware, electron, electronics, LLRF

461

D.O. Tavares, G.B.M. Bruno, S.R. Marques, L.M. Russo, H.A. Silva
LNLS, Campinas, Brazil

More and more facilities have been adopting MicroTCA.4 as the standard for new electronics. Despite the advertised advantages in terms of system manageability, high availability, backplane performance and supply of high quality COTS modules by industry, the standard still lacks a greater acceptance in the accelerators community. This paper reports on the deployment of MicroTCA.4 systems at Sirius light source, which comprised the development and manufacturing of several open hardware modules, development of a generic gateware/software framework and re-implementation of MMC IPMI firmware as an open source project. A special focus will be given to the difficulties found, unforeseen expansions of the system and general architectural aspects. Based on this experience and on a survey carried out among other MicroTCA.4 adopters, the perceived strengths and weaknesses of the standard will be discussed and a tentative outlook on how it could be evolved to better suit the accelerators community will be presented.

Slides WEBO02 [34.322 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEBO02

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paper received ※ 05 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019

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WEBO04

Enhancement of the S-DALINAC Control System with Machine Learning Methods

network, target, linac, electron

475

J.H. Hanten, M. Arnold, J. Birkhan, C. Caliari, N. Pietralla, M. Steinhorst
TU Darmstadt, Darmstadt, Germany

Funding: *Work supported by DFG through GRK 2128
For the EPICS-based control system of the superconducting Darmstadt electron linear accelerator S-DALINAC**, supporting infrastructures based on machine learning are currently developed. The most important support for the operators is to assist the beam setup and controlling with reinforcement learning using artificial neural networks. A particle accelerator has a very large parameter space with often hidden relationships between them. Therefore neural networks are a suited instrument to use for approximating the needed value function which represents the value of a certain action in a certain state. Different neural network structures and their training with reinforcement learning are currently tested with simulations. Also there are different candidates for the reinforcement learning algorithms such as Deep-Q-Networks (DQN) or Deep-Deterministic-Policy-Gradient (DDPG). In this contribution the concept and first results will be presented.
**N. Pietralla, Nuclear Physics News, Vol. 28, No.2, 4 (2018)

Slides WEBO04 [2.073 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEBO04

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paper received ※ 03 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019

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WECO01

Characterisation of Closed Orbit Feedback Systems

feedback, synchrotron, electron, hadron

479

G. Rehm
DLS, Oxfordshire, United Kingdom

Closed orbit feedback is applied at nearly all synchrotrons. Detailed investigations continue to be performed on the mathematical modelling of the spatial part (i.e. related to Orbit Response Matrix) and the dynamic part (i.e. the controller). This talk will serve as a summary of the ARIES workshop on closed orbit feedback organized by ALBA in November 2018. Benefits of recent advances compared to the traditional implementations will be highlighted.

Slides WECO01 [4.912 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WECO01

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paper received ※ 06 September 2019 paper accepted ※ 20 November 2019 issue date ※ 10 November 2019

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WEPP015

ESS Beam Position and Phase Monitor System

electronics, electron, linac, FPGA

543

R.A. Baron, H. Hassanzadegan, A. Jansson, H. Kocevar, K.E. Rosengren, T.J. Shea
ESS, Lund, Sweden
I. Bustinduy, S. Varnasseri
ESS Bilbao, Zamudio, Spain
F. Grespan, M. Poggi
INFN/LNL, Legnaro (PD), Italy
T. Gräber
DESY Zeuthen, Zeuthen, Germany
D. Lipka, S. Vilcins
DESY, Hamburg, Germany

The European Spallation Source (ESS) is a neutron facility under construction in Lund, Sweden, and established as an European collaboration between different member countries. The machine is a 2 GeV proton LINAC with a nominal beam current of 62.5 mA, 2.86 ms of pulse length and a bunch repetition rate of 352 MHz. The Beam Position and Phase Monitors (BPM) at ESS were designed to satisfy the specifications for the different beam modes, which span from 5 µs pulse length and 6.3 mA beam until the nominal beam condition. The system is designed for standard beam position measurements for beam trajectory correction and for beam phase measurements for cavity phase tuning, imposing restrictions on the sensor design and electronics architecture. Approximately a hundred BPM’s were manufactured and are being installed by partners in collaboration with ESS. The BPM system comprises a MicroTCA.4 electronics based in COTS AMC and RTM modules with custom FPGA firmware implementation and a custom Front-End electronics. In this work, the system architecture, implementation, performance, and test results are presented and discussed.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP015

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paper received ※ 04 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019

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WEPP016

Real-Time Synchronized Calibration and Computing System with EPICS Based Distributed Controls in the TPS XBPM System

EPICS, photon, distributed, synchrotron

548

J.-Y. Chuang, C.K. Chan, C.-C. Chang, C.M. Cheng, Y.T. Cheng, Y.M. Hsiao, Y.Z. Lin, Y.-C. Liu, C. Shueh, Y.C. Yang
NSRRC, Hsinchu, Taiwan

In synchrotron facilities, X-ray beam position monitor (XBPM) is an important detector for photon beam position monitoring and must be calibrated to ensure reliability and precision. However, light source operating conditions, such as beam orbit, injection and insertion device parameters, etc., can influence the sensitivity and specific weighting of photoemission current from the XBPM diamond blades. In the Taiwan Photon Source (TPS), Experimental Physics and Industrial Control System (EPICS) was utilized to implant an automatic calibration process. By using EPICS, we can ensure a seamless integration between the different front ends (FEs) and direct all data stream into a centralized server, creating a distributed XBPM calibration system. The XBPM performance indicators are analyzed to evaluate the validity of calibration parameters by input/ output controller (IOC) in each FE computing system. This paper will discuss the benefits of implanting this distributed control system into a working environment such as the TPS.
XBPM, TPS, Front end, Distributed XBPM calibration system

Poster WEPP016 [0.843 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP016

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paper received ※ 01 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019

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WEPP020

First results on Femtosecond Level Photocathode Laser Synchronization at the SINBAD Facility

laser, timing, electron, linac

564

M. Titberidze, M. Felber, T. Kozak, T. Lamb, J. Müller, H. Schlarb, S. Schulz, C. Sydlo, F. Zummack
DESY, Hamburg, Germany

SINBAD, the "short-innovative bunches and accelerators at DESY" is an accelerator research and development facility which will host various experiments. SINBAD-ARES linac is a conventional S-band linear accelerator which will be capable of producing ultra-short electron bunches with duration of few femtoseconds and energy of up to 100 MeV. In order to fully utilize the potential of ultra-short electron bunches while probing the novel acceleration techniques (e.g. external injection in LWFA), it is crucial to achieve femtosecond level synchronization between photocathode laser and RF source driving the RF gun of the ARES linac. In this paper we present the first results on the synchronization of the near-infrared photocathode laser to the RF source with the residual timing jitter performance of ~10 fs rms. These results were obtained using a conventional laser-to-RF synchronization setup employing heterodyne detection of an RF signal generated by impinging the laser pulses to a fast photodetector. In addition, we describe an advanced laser-to-RF phase detection scheme as a future upgrade; promising even lower timing jitter and most importantly the long-term timing drift stability.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP020

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paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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WEPP042

Measurement of the Second Moments of Transverse Beam Distribution with Solenoid Scan

electron, emittance, solenoid, experiment

642

I. Pinayev
BNL, Upton, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
Measurement of the dependence of the beam size on profile monitor vs. strength of a focusing element is widely used for measurement of the beam parameters. Such measurements are mostly used for the separate planes and assumption that beam satisfied Gaussian distribution. In many linear accelerators the transverse beam dynamics is coupled between planes and distribution is far from the Gaussian. We developed measurement technique of the second moments of beam distribution which does not rely on any assumptions. The theory and experimental results are presented.

Poster WEPP042 [1.756 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP042

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paper received ※ 03 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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WEPP045

Development of an Automated BPM Test Bench

linac, instrumentation, diagnostics, beam-diagnostic

651

M. Schwarz, H. Podlech
IAP, Frankfurt am Main, Germany
H. Höltermann, B. Koubek, U. Ratzinger, W. Schweizer, D. Strehl, C. Trageser
BEVATECH, Frankfurt, Germany

The Institute for Applied Physics (IAP) of Goethe University Frankfurt has a long history in developing DTL-cavities and further essential components of particle accelerators from design and simulation up to tuning and final testing. In recent times, the development of beam diagnostic components for the hadron accelerator projects has become increasingly important. Bevatech is designing and setting up linear accelerators, RF and vacuum technology for research laboratories and enterprises worldwide. In a joint effort a simple, efficient and mobile beam position monitor (BPM) test bench has been developed and will be further improved for future tests and the calibration of beam position monitors. It is fully automated using single-board computers and microcontrollers to obtain the essential calibration data like electrical offset, button sensitivity and the 2D response map. In addition, initial tests with the implementation and evaluation of the Libera signal processing units Single Pass H and Spark were promising.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP045

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paper received ※ 03 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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WEPP046

Technology and First Beam Tests of the New CERN-SPS Beam Position System

electronics, electron, pick-up, radiation

655

M. Wendt, M. Barros Marin, A. Boccardi, T.B. Bogey, I. Degl’Innocenti, A. Topaloudis
CERN, Meyrin, Switzerland

The CERN Super Proton Synchrotron (SPS) uses 215 beam position monitors (BPMs) to observe the beam orbit when accelerating protons or ions on a fast ramp cycle to beam energies of up to 450 GeV/c. In the frame of the CERN LHC Injector Upgrade (LIU) initiative the aged, and diffi- cult to maintain homodyne-receiver based BPM read-out system is currently being upgraded with A Logarithmic Po- sition System ¿ ALPS. As the name indicates, this new BPM electronics builds upon the experience at CERN with using logarithmic detector amplifiers for beam position processing, and is well suited to cover the large range of beam intensities accelerated in the SPS. The system will use radiation toler- ant electronics located in close proximity to the split-plane or stripline beam position monitor with GB/s optical data transmission to the processing electronics located on the surface. Technical details of the analog and digital signal processing, the data transmission using optical fibers, cal- ibration and testing, as well as first beam tests on a set of ALPS prototypes are presented in this paper.

Poster WEPP046 [16.711 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP046

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paper received ※ 06 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

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