IBIC2018 - List of Keywords (electronics)

Paper	Title	Other Keywords	Page
MOOA02	Noise in Radio/Optical Communications	electron, radio-frequency, optics, feedback	1
	M. Vidmar University of Ljubljana, Faculty of Electrical Engineering, Ljubljana, Slovenia
	Noise is a random signal that affects the performance of all electronic and/or optical devices. Although the sources of different kinds of noise have their backgrounds in physics, engineers dealing with noise use different methods and units to specify noise. The intention of this tutorial is to describe the main effects of noise in electronics up to optical frequencies while providing links between the physics and engineering worlds. In particular, noise is considered harmful while degrading the signal-to-noise ratio or broadening the spectrum of signal sources. On the other hand, noise can be itself a useful signal. Finally, artificially generated signals that exhibit many properties of random natural noise are sometimes required.
	Slides MOOA02 [3.742 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOOA02
About •	paper received ※ 28 August 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOOB03	Upgrade and Status of Standard Diagnostic-Systems at FLASH and FLASHForward	FEL, electron, diagnostics, cavity	13
	N. Baboi, H.T. Duhme, O. Hensler, G. Kube, T. Lensch, D. Lipka, B. Lorbeer, Re. Neumann, P.A. Smirnov, T. Wamsat, M. Werner DESY, Hamburg, Germany
	Electron beam diagnostics plays a crucial role in the precise and reliable generation of ultra-short high bril-liance XUV and soft X-ray beams at the Free Electron Laser in Hamburg (FLASH). Most diagnostic systems monitor each of up to typically 600 bunches per beam, with a frequency of up to 1 MHz, a typical charge be-tween 0.1 and 1 nC and an energy of 350 to 1250 MeV. The diagnostic monitors have recently undergone a major upgrade. This process started several years ago with the development of monitors fulfilling the requirements of the European XFEL and of the FLASH2 undulator beamline and it continued with their installation and commissioning. Later they have been further improved and an upgrade was made in the old part of the linac. Also the FLASHForward plasma-wakefield acceleration experiment has been installed in the third beamline. This paper will give an overview of the upgrade of the BPM, Toroid and BLM systems, pointing out to their improved performance. Other systems underwent a partial upgrade, mainly by having their VME-based ADCs replaced with MTCA type. The overall status of the diagnostic will be reviewed.
	Slides MOOB03 [2.728 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOOB03
About •	paper received ※ 05 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOOB04	Upgrade of the Machine Protection System Toward 1.3 MW Operation of the J-PARC Neutrino Beamline	target, proton, operation, FPGA	18
	K. Sakashita, M.L. Friend, K. Nakayoshi KEK, Ibaraki, Japan Y. Koshio, S. Yamasu Okayama University, Faculty of Science, Okayama City, Japan
	The machine protection system (MPS) is one of the essential components to realize safe operation of the J-PARC neutrino beamline, where a high intensity neutrino beam for the T2K long baseline neutrino oscillation experiment is generated by striking 30GeV protons on a graphite target. The proton beam is extracted from the J-PARC main ring proton synchrotron (MR) into the primary beamline. The beamline is currently operated with 485kW MR beam power. The MR beam power is planned to be upgraded to 1.3+ MW. The neutrino production target could be damaged if the high intensity beam hits off-centered on the target, due to non-uniform thermal stress. Therefore, in order to protect the target, it is important to immediately stop the beam when the beam orbit is shifted. A new FPGA-based interlock module, with which the beam profile is calculated in real time, was recently developed and commissioned. This module reads out signals from a titanium-strip-based secondary emission profile monitor (SSEM) which is placed in the primary beamline. An overview of the upgrade plan of the MPS system and the results of an initial evaluation test of the new interlock module will be discussed.
	Slides MOOB04 [8.367 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOOB04
About •	paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPB13	Active Magnetic Field Compensation System for SRF Cavities	cavity, SRF, controls, electron	101
	L.H. Ding Laboratory GREYC, Caen, France J. Liang, H. Liu, Z.P. Xie Hohai University, Nanjing, People’s Republic of China Z.P. Xie IMP/CAS, Lanzhou, People’s Republic of China
	Abstract: Superconducting Radio Frequency (SRF) cavities are becoming popular in modern particle accelerators. When the SRF cavity is transitioning from the non-conducting to the Superconducting state at the critical temperature (Tc), the ambient magnetic field can be trapped. This trapped flux may lead to an increase in the surface resistance of the cavity wall, which can reduce the Q-factor and efficiency of the cavity. In order to increase the Q-factor, it is important to lower the surface resistance by reducing the amount of magnetic flux trapped in the cavity wall to sub 10mG range during the Tc transition. In this paper, we present a 3-axis automatic active magnetic field compensation system that is capable of reducing the earth magnetic field and any local disturbance field. Design techniques are described to enhance the system stability while utilizing the flexibility of embedded electronics. This paper describes the system implementation and concludes with initial results of tests. Experimental results demonstrate that the proposed magnetic field compensation system can reduce the earth magnetic field to around 2.5 mG even without shielding.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOPB13
About •	paper received ※ 05 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPC02	Identification of Faulty Beam Position Monitor Based Clustering by Fast Search and Find of Density Peaks	SRF, storage-ring, electron, operation	114
	R. Jiang, Y.B. Leng SSRF, Shanghai, People’s Republic of China F.Z. Chen, Z.C. Chen, Y.B. Leng SINAP, Shanghai, People’s Republic of China
	The accuracy and stability of beam position moni-tors(BPMs) are important for all kinds of measurement systems and feedback systems in particle accelerator field. A proper method detecting faulty beam position monitor or monitoring their stability could optimize accel-erator operating conditions. With development in ma-chine learning methods, a series of powerful analysis approaches make it possible for detecting beam position monitor’s stability. Here, this paper proposed a clustering analysis approach to detect the defective BPMs. The method is based on the idea that cluster centres are char-acterized by a higher density than their neighbours and by a relatively large distance from points with higher densi-ties. The results showed that clustering by fast search and find of density peaks could classify beam data into dif-ferent clusters on the basis of their similarity. And that, aberrant data points could be detected by decision graph. So the algorithm is appropriate for BPM detecting and it could be a significant supplement for data analysis in accelerator physics.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOPC02
About •	paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPC04	Beam Charge Measurement and System Calibration in CSNS	proton, target, extraction, operation	122
	W.L. Huang, F. Li IHEP CSNS, Guangdong Province, People’s Republic of China L. Ma, S. Wang, T.G. Xu IHEP, Beijing, People’s Republic of China
	In China Spallation Neutron Source(CSNS), the beam charge monitors along the ring to the target beam transport line(RTBT) and the ring to the dump beam transport line(RDBT), are consisted of an ICT and three FCTs manufactured by Bergoz. The electronics includes a set of NI PXIe-5160 oscilloscope digitizer, and a Beam Charge Monitor(BCM) from Bergoz as supplementary. The beam charge monitors provide the following information: a) the quantity of protons bombarded the tungsten target; b) the efficiency of particle transportation; c) a T0 signal to the detectors and spectrometers of the white neutron source. With the calibration with an octopus 50Ω terminator in lab and an onboard 16-turn calibrating coils at the local control room, corrections for the introducing the 16-turn calibrating coils and the long cable were made. An accuracy of ±2% for the beam charge measurement during the machine operation has been achieved with the ICT/FCTs and a PXIe-5160 oscilloscope digitizer.
	Poster MOPC04 [3.082 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOPC04
About •	paper received ※ 04 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPC06	Comparative Measurement and Characterisation of Three Cryogenic Current Comparators Based on Low-Temperature Superconductors	cryogenics, pick-up, antiproton, proton	126
	V. Tympel, T. Stöhlker HIJ, Jena, Germany H. De Gersem, N. Marsic, W.F.O. Müller TEMF, TU Darmstadt, Darmstadt, Germany M.F. Fernandes, C.P. Welsch Cockcroft Institute, Warrington, Cheshire, United Kingdom M.F. Fernandes, J. Tan CERN, Geneva, Switzerland M.F. Fernandes, C.P. Welsch The University of Liverpool, Liverpool, United Kingdom J. Golm, R. Neubert, F. Schmidl, P. Seidel FSU Jena, Jena, Germany D.M. Haider, F. Kurian, M. Schwickert, T. Sieber, T. Stöhlker GSI, Darmstadt, Germany R. Neubert Thuringia Observatory Tautenburg, Tautenburg, Germany M. Schmelz, R. Stolz IPHT, Jena, Germany T. Stöhlker IOQ, Jena, Germany V. Zakosarenko Supracon AG, Jena, Germany
	Funding: Supported by the BMBF, project numbers 05P15SJRBA and 05P18SJRB1. A Cryogenic Current Comparator (CCC) is a non-destructive, metrological-traceable charged particle beam intensity measurement system for the nano-ampere range. Using superconducting shielding and coils, low temperature Superconducting Quantum Interference Devices (SQUIDs) and highly permeable flux-concentrators, the CCC can operate in the frequency range from DC to several kHz or hundreds of kHz depending on the requirement of the application. Also, the white noise level can be optimized down to 2 pA/sqrt(Hz) at 2.16 K. This work compares three different Pb- and Nb-based CCC-sensors developed at the Institute of Solid State Physics and Leibniz Institute of Photonic Technology at Jena, Germany: CERN-Nb-CCC, optimized for applica-tion at CERN Antiproton Decelerator (AD) in 2015 with a free inner diameter of 185 mm; GSI-Pb-CCC, designed for GSI-Darmstadt with a free inner diameter of 145 mm, 1996 completed, 2014 upgraded; GSI-Nb-CCC-XD, de-signed for the GSI/FAIR-project with a free inner diame-ter of 250 mm, 2017 completed. The results of noise, small-signal, slew-rate, and drift measurements done 2015 and 2018 in the Cryo-Detector Lab at the University of Jena are presented here.
	Poster MOPC06 [2.150 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOPC06
About •	paper received ※ 05 September 2018 paper accepted ※ 14 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPC10	Upgrade and Improvement of CT Based on TMR	electron, simulation, vacuum, power-supply	134
	Y. Zhao, Y.Y. Du, L. Wang IHEP, Beijing, People’s Republic of China
	The CT based on TMR sensor has been developed in the lab. For Improving the accuracy and linearity, re-ducing the influence of sensor position, a series simu-lation and calculation have been done which conduct an upgrade both in the mechanical structure and elec-tronics design. Lab test shows good results and test on beam will be carried on soon.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOPC10
About •	paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUOC03	Commissioning of the Open Source Sirius BPM Electronics	electron, controls, FPGA, timing	196
	S.R. Marques, G.B.M. Bruno, L.M. Russo, H.A. Silva, D.O. Tavares LNLS, Campinas, Brazil
	The new Brazilian 4th generation light source, Sirius, have already started and commissioning is planned to start in 2018. This paper will report on the manufacturing, deployment and production batch testing of the in-house developed BPM electronics. The latest performance and reliability achievements will be presented.
	Slides TUOC03 [14.606 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUOC03
About •	paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUOC04	Development of Beam Position Monitor for the SPring-8 Upgrade	electron, radiation, storage-ring, brilliance	204
	H. Maesaka RIKEN SPring-8 Center, Innovative Light Sources Division, Hyogo, Japan H. Dewa, T. Fujita, M. Masaki, S. Takano JASRI, Hyogo, Japan
	We are developing a new electron beam position monitor (BPM) system for the low-emittance upgrade of SPring-8. The requirements for the BPM system are: (1) a single-pass resolution of 100 µm rms for a 100 pC bunch and an electric center accuracy of 100 µm rms for the initial beam commissioning to achieve the first turn, (2) a closed-orbit distortion (COD) resolution better than 0.1 µm rms for a 100 mA stored beam and a position stability of less than 5 µm for the ultimate stability of a photon beam axis. We have completed prototypes of a precise button electrode and a BPM block to obtain high-intensity signals and sufficient mechanical accuracy while suppressing high-Q trapped modes leading to impedance and heating issues. The development of readout electronics based on the MTCA.4 standard and the evaluation of radiation-hard coaxial cables have also been conducted. The prototype BPM head was installed in the present SPring-8 storage ring for performance verification with an actual electron beam. We confirmed sufficient signal intensity, electric center accuracy, position stability, etc. by the beam test. The new BPM system is almost ready for the SPring-8 upgrade.
	Slides TUOC04 [2.126 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUOC04
About •	paper received ※ 06 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPB01	The Installation and Commissioning of the AWAKE Stripline BPM	electron, proton, MMI, TRIUMF	253
	S. Liu, P.E. Dirksen, V.A. Verzilov TRIUMF, Vancouver, Canada S.J. Gessner, F. Guillot-Vignot, D. Medina, L. Søby CERN, Geneva, Switzerland
	Funding: # TRIUMF contribution was supported by NSERC and CNRC AWAKE (The Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN) stripline BPMs are required to measure the position of the single electron bunch to a position resolution of less than 10 µm rms for electron charge of 100 pC to 1 nC. This paper describes the design, installation and commissioning of a such BPM system developed by TRIUMF (Canada). Total 12 BPMs and electronics had been installed on AWAKE beam lines and started commissioning since Fall of 2017. The calibration and measurement performance are also reviewed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPB01
About •	paper received ※ 04 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPB02	Complete Test Results of New BPM Electronics for the ESRF New LE-Ring	electron, SRF, controls, MMI	257
	K.B. Scheidt ESRF, Grenoble, France
	Among the 320 BPMs in the ESRF new low emittance ring, a set of 128 units will be equipped with new electronics, while the other set (192) will be served by the existing Libera-Brilliance electronics. These new electronics are an upgraded version of the low-cost Spark electronics originally developed 3 years ago for the ESRF Injector complex. All these 128 units have been installed in the first half of 2018 on existing BPM signals (through duplication with RF-splitters) and subsequently been tested thoroughly for performance characteristics like stability, resolution and reliability. It will be shown that while these Sparks have a very straightforward and simple concept, i.e. completely omitting calibration schemes like RF-cross-bar switching, pilot-tone introduction or active temperature control, that they are fully compatible with all the beam position measurement requirements of this new ring.
	Poster TUPB02 [1.577 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPB02
About •	paper received ※ 30 August 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPB03	Results of SPIRAL2 Beam Position Monitors on the Test Bench of the RFQ	linac, operation, electron, rfq	261
	M. Ben Abdillah, P. Ausset IPN, Orsay, France R. Ferdinand GANIL, Caen, France
	SPIRAL2 project is based on a multi-beam superconducting LINAC designed to accelerate 5 mA deuteron beams up to 40 MeV, proton beams up to 33 MeV and 1 mA light and heavy ions (Q/A = 1/3) up to 14.5 MeV/A. The accurate tuning of the LINAC is essential for the operation of SPIRAL2 and requires measurement of the beam transverse position, the phase of the beam with respect to the radiofrequency voltage, the ellipticity of the beam and the beam energy with the help of Beam Position Monitor (BPM) system. The commissioning of the RFQ gave us the opportunity to install two BPM sensors, associated with their electronics, mounted on a test bench. The test bench is a D-plate fully equipped with a complete set of beam diagnostic equipment in order to characterize as completely as possible the beam delivered by the RFQ and to gain experience with the behavior of these diagnostics under beam operation. This paper addresses the measurements carried with the two BPMs on the Dplate: energy, transverse position and ellipticity under 750 KeV proton beam operation
	Poster TUPB03 [1.443 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPB03
About •	paper received ※ 04 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPB13	Stability Tests with Pilot-Tone Based Elettra BPM RF Front End and Libera Electronics	electron, real-time, instrumentation, FPGA	289
	M. Cargnelutti, P. Leban, M. Žnidarčič I-Tech, Solkan, Slovenia S. Bassanese, G. Brajnik, S. Cleva, R. De Monte Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	Long-term stability is one of the most important properties of the BPM readout system. Recent developments on pilot tone capable front end have been tested with an established BPM readout electronics. The goal was to demonstrate the effectiveness of the pilot tone compensation to varying external conditions. Simulated cable attenuation change and temperature variation of the readout electronics were confirmed to have no major effect to position data readout. The output signals from Elettra front end (carrier frequency and pilot tone frequency) were processed by a Libera Spark with the integrated standard front end which contains several filtering, attenuation and amplification stages. Tests were repeated with a modified instrument (optimized for pilot tone) to compare the long-term stability results. Findings show the pilot tone front end enables great features like self-diagnostics and cable-fault compensation as well as small improvement in the long-term stability. Measurement resolution is in range of 10 nanometers RMS in 5 Hz bandwidth.
	Poster TUPB13 [1.223 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPB13
About •	paper received ※ 31 August 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPC03	Beam Quality Monitoring System in the HADES Experiment at GSI Using CVD Diamond Material	detector, monitoring, electron, experiment	300
	A. Rost, T. Galatyuk TU Darmstadt, Darmstadt, Germany J. Adamczewski-Musch, S. Linev, J. Pietraszko, M. Traxler GSI, Darmstadt, Germany
	Funding: Work supported by the DFG through GRK 2128 and VH-NG-823. The beam quality monitoring of extracted beams from SIS18, transported to the HADES experiment, is of great importance to ensure high efficiency data recording. The main detector system used for this purpose is the Start-Veto system which consists of two diamond based sensors made of pcCVD and scCVD materials. Both sensors are equipped with a double-sided strip segmented metalization (300 µm width) which allows a precise position determination of the beam position. Those senors are able to deliver a time precision <100 ps and can handle rate capabilities up to 10⁷ particles/channel. The read-out of the sensors is based on the TRB3 system [1]. Precise FPGA-TDCs (264 channels, <10 ps RMS) are implemented inside FPGAs. The TRB3 system serves as data acquisition system with scaler capability. Analysis and on-line visualization will be performed in DABC [2]. Having the precise time measurement and a precise position information of the incoming beam ions one can monitor important beam parameters namely the beam intensity, its position during extraction and the beam time structure. In this contribution the general read-out concept will be introduced. [1] A. Neiser et al., TRB3: a 264 channel high precision TDC platform and its applications, 2013 JINST 8 C12043. [2] dabc.gsi.de, 30.05.2018
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPC03
About •	paper received ※ 05 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPC04	BPM System Upgrade at COSY	controls, EPICS, electron, operation	303
	V. Kamerdzhiev, I. Bekman, C. Böhme, B. Lorentz, S. Merzliakov, P. Niedermayer, K. Reimers, M. Simon, M. Thelen FZJ, Jülich, Germany
	The beam position monitoring system of the Cooler Synchrotron (COSY) has been upgraded in 2017. The upgrade was driven by the requirement of the JEDI collaboration to significantly improve the orbit control and by the electronics approaching end-of-life. The entire signal processing chain has been replaced. The new low noise amplifiers, mounted directly on the BPM vacuum feedthroughs, were developed in-house and include adjustable gain in 80 dB rage and in-situ test and calibration capabilities. The signals are digitized and processed by means of commercial BPM signal processing units featuring embedded EPICS IOC. The decision path, technical details of the upgrade and performance of the new system are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPC04
About •	paper received ※ 13 September 2018 paper accepted ※ 14 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPC07	First Results of Button BPMs at FRIB	electron, linac, MMI, pick-up	311
	S. Cogan, J.L. Crisp, T.M. Ford, S.M. Lidia FRIB, East Lansing, USA
	Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University. Commissioning and tuning the linac driver for the Facility for Rare Isotope Beams (FRIB) requires a large network of warm and cryogenic BPMs, with apertures of 40 - 150 mm, sensitivity to beam currents of 100 nA to 1 mA, and accurate for beams with velocities as low as 0.03c. We present initial results of the BPM system, analog and digital signal processing, distortion and error correction, and calibration for time of flight (TOF) measurements. Measurements for low energy beams are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPC07
About •	paper received ※ 13 September 2018 paper accepted ※ 20 November 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEOB02	RadFET Dose Monitor System for SOLEIL	radiation, electron, storage-ring, vacuum	353
	N. Hubert, F. Dohou, M. El Ajjouri, D. Pédeau SOLEIL, Gif-sur-Yvette, France
	Soleil is currently testing new dose monitors based on RadFET transistors. This new detector at SOLEIL will provide a measurement of the dose received by equipment that are damaged by the radiations in the storage ring, and to anticipate their replacement. This monitor should be very compact to be placed in tiny areas, sensitive to all kind of radiation and low cost to install many of them around the ring. A readout electronic module is being developed in-house, and a first prototype has been build and installed on the machine. Description of the system and first results recorded on the machine are presented.
	Slides WEOB02 [4.250 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEOB02
About •	paper received ※ 05 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPA07	Beam Phase Measurement System in CSNS Linac	linac, DTL, rfq, MMI	386
	P. Li, J. Peng IHEP CSNS, Guangdong Province, People’s Republic of China F. Li, T.G. Xu IHEP, Beijing, People’s Republic of China M. Meng DNSC, Dongguan, People’s Republic of China W. Peng CETC, Shushan, People’s Republic of China
	We developed beam phase measurement system ourselves in CSNS (China Spallation Neutron Source). The resolution of the system is less than 0.1° and the accuracy is less than 1°. It played a key role in CSNS Linac commissioning especially in RFQ and DTL commissioning. Further we measured the beam energy by TOF (Time of Flight) method base on this system. The energy accuracy is less than 0.1 MeV.
	Poster WEPA07 [1.070 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPA07
About •	paper received ※ 04 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPA15	Development of BAM Electronics in PAL-XFEL	electron, pick-up, controls, site	400
	D.C. Shin, J.H. Hong, H.-S. Kang, C. Kim, G. Kim, C.-K. Min PAL, Pohang, Republic of Korea
	We describe an electronics for electron bunch arrival time monitor (BAM) with a less than 10 femtosecond resolution, which was developed in 2017 and is currently in use at PAL-XFEL. When electron bunches go through an S-band monopole cavity, about 1 us long RF signal can be obtained to compare with a low phase noise RF reference. The differential phase jitter corresponds to the arrival time jitter of electron bunches. RF front-end (F/E) which converts the S-band pickup signal to intermediate frequency (IF) signal, is the essential part of a good time resolution. The digitizer and the signal processor of the BAM electronics are installed in an MTCA platform. This paper presents the design scheme, test results of the BAM electronics and future improvement plans.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPA15
About •	paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPB15	A Multipurpose Scintillating Fibre Beam Monitor for the Measurement of Secondary Beams at CERN	experiment, detector, electron, secondary-beams	468
	I. Ortega Ruiz, L. Fosse, J. Franchi, A. Frassier, J. Fullerton, J. Kral, J. Lauener, T. Schneider, J. Spanggaard, G. Tranquille CERN, Meyrin, Switzerland
	A scintillating fibre beam monitor has been developed at CERN for the measurement of low energy and low intensity secondary beams. This monitor can track the passage of individual particles up to intensities of 10⁷ particles per second per mm², over an active area of 20 cm x 20 cm, and with a spatial resolution of 1 mm. Thanks to an external trigger system, the achieved detection efficiency is 95% and the noise level is kept below 10^-4 events/second. The simple design of this monitor avoids the common production difficulties of scintillating fibre detectors and makes its maintenance easier, when compared to other tracking detectors, due to the absence of gas or cooling. Using special electronics, a version of the monitor can also be used for time-of-flight measurements, achieving a time resolution of 900 ps. Thanks to its versatility, the monitor will perform several functions when measuring the secondary beams of the CERN Neutrino Platform: beam profile, position and intensity measurement, magnetic momentum spectrometry, particle identification through time-of-flight, and trigger generation for the experiments.
	Poster WEPB15 [1.172 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPB15
About •	paper received ※ 03 September 2018 paper accepted ※ 14 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOOA02

Noise in Radio/Optical Communications

electron, radio-frequency, optics, feedback

1

M. Vidmar
University of Ljubljana, Faculty of Electrical Engineering, Ljubljana, Slovenia

Noise is a random signal that affects the performance of all electronic and/or optical devices. Although the sources of different kinds of noise have their backgrounds in physics, engineers dealing with noise use different methods and units to specify noise. The intention of this tutorial is to describe the main effects of noise in electronics up to optical frequencies while providing links between the physics and engineering worlds. In particular, noise is considered harmful while degrading the signal-to-noise ratio or broadening the spectrum of signal sources. On the other hand, noise can be itself a useful signal. Finally, artificially generated signals that exhibit many properties of random natural noise are sometimes required.

Slides MOOA02 [3.742 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOOA02

About •

paper received ※ 28 August 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOOB03

Upgrade and Status of Standard Diagnostic-Systems at FLASH and FLASHForward

FEL, electron, diagnostics, cavity

13

N. Baboi, H.T. Duhme, O. Hensler, G. Kube, T. Lensch, D. Lipka, B. Lorbeer, Re. Neumann, P.A. Smirnov, T. Wamsat, M. Werner
DESY, Hamburg, Germany

Electron beam diagnostics plays a crucial role in the precise and reliable generation of ultra-short high bril-liance XUV and soft X-ray beams at the Free Electron Laser in Hamburg (FLASH). Most diagnostic systems monitor each of up to typically 600 bunches per beam, with a frequency of up to 1 MHz, a typical charge be-tween 0.1 and 1 nC and an energy of 350 to 1250 MeV. The diagnostic monitors have recently undergone a major upgrade. This process started several years ago with the development of monitors fulfilling the requirements of the European XFEL and of the FLASH2 undulator beamline and it continued with their installation and commissioning. Later they have been further improved and an upgrade was made in the old part of the linac. Also the FLASHForward plasma-wakefield acceleration experiment has been installed in the third beamline. This paper will give an overview of the upgrade of the BPM, Toroid and BLM systems, pointing out to their improved performance. Other systems underwent a partial upgrade, mainly by having their VME-based ADCs replaced with MTCA type. The overall status of the diagnostic will be reviewed.

Slides MOOB03 [2.728 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOOB03

About •

paper received ※ 05 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOOB04

Upgrade of the Machine Protection System Toward 1.3 MW Operation of the J-PARC Neutrino Beamline

target, proton, operation, FPGA

18

K. Sakashita, M.L. Friend, K. Nakayoshi
KEK, Ibaraki, Japan
Y. Koshio, S. Yamasu
Okayama University, Faculty of Science, Okayama City, Japan

The machine protection system (MPS) is one of the essential components to realize safe operation of the J-PARC neutrino beamline, where a high intensity neutrino beam for the T2K long baseline neutrino oscillation experiment is generated by striking 30GeV protons on a graphite target. The proton beam is extracted from the J-PARC main ring proton synchrotron (MR) into the primary beamline. The beamline is currently operated with 485kW MR beam power. The MR beam power is planned to be upgraded to 1.3+ MW. The neutrino production target could be damaged if the high intensity beam hits off-centered on the target, due to non-uniform thermal stress. Therefore, in order to protect the target, it is important to immediately stop the beam when the beam orbit is shifted. A new FPGA-based interlock module, with which the beam profile is calculated in real time, was recently developed and commissioned. This module reads out signals from a titanium-strip-based secondary emission profile monitor (SSEM) which is placed in the primary beamline. An overview of the upgrade plan of the MPS system and the results of an initial evaluation test of the new interlock module will be discussed.

Slides MOOB04 [8.367 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOOB04

About •

paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPB13

Active Magnetic Field Compensation System for SRF Cavities

cavity, SRF, controls, electron

101

L.H. Ding
Laboratory GREYC, Caen, France
J. Liang, H. Liu, Z.P. Xie
Hohai University, Nanjing, People’s Republic of China
Z.P. Xie
IMP/CAS, Lanzhou, People’s Republic of China

Abstract: Superconducting Radio Frequency (SRF) cavities are becoming popular in modern particle accelerators. When the SRF cavity is transitioning from the non-conducting to the Superconducting state at the critical temperature (Tc), the ambient magnetic field can be trapped. This trapped flux may lead to an increase in the surface resistance of the cavity wall, which can reduce the Q-factor and efficiency of the cavity. In order to increase the Q-factor, it is important to lower the surface resistance by reducing the amount of magnetic flux trapped in the cavity wall to sub 10mG range during the Tc transition. In this paper, we present a 3-axis automatic active magnetic field compensation system that is capable of reducing the earth magnetic field and any local disturbance field. Design techniques are described to enhance the system stability while utilizing the flexibility of embedded electronics. This paper describes the system implementation and concludes with initial results of tests. Experimental results demonstrate that the proposed magnetic field compensation system can reduce the earth magnetic field to around 2.5 mG even without shielding.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOPB13

About •

paper received ※ 05 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPC02

Identification of Faulty Beam Position Monitor Based Clustering by Fast Search and Find of Density Peaks

SRF, storage-ring, electron, operation

114

R. Jiang, Y.B. Leng
SSRF, Shanghai, People’s Republic of China
F.Z. Chen, Z.C. Chen, Y.B. Leng
SINAP, Shanghai, People’s Republic of China

The accuracy and stability of beam position moni-tors(BPMs) are important for all kinds of measurement systems and feedback systems in particle accelerator field. A proper method detecting faulty beam position monitor or monitoring their stability could optimize accel-erator operating conditions. With development in ma-chine learning methods, a series of powerful analysis approaches make it possible for detecting beam position monitor’s stability. Here, this paper proposed a clustering analysis approach to detect the defective BPMs. The method is based on the idea that cluster centres are char-acterized by a higher density than their neighbours and by a relatively large distance from points with higher densi-ties. The results showed that clustering by fast search and find of density peaks could classify beam data into dif-ferent clusters on the basis of their similarity. And that, aberrant data points could be detected by decision graph. So the algorithm is appropriate for BPM detecting and it could be a significant supplement for data analysis in accelerator physics.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOPC02

About •

paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPC04

Beam Charge Measurement and System Calibration in CSNS

proton, target, extraction, operation

122

W.L. Huang, F. Li
IHEP CSNS, Guangdong Province, People’s Republic of China
L. Ma, S. Wang, T.G. Xu
IHEP, Beijing, People’s Republic of China

In China Spallation Neutron Source(CSNS), the beam charge monitors along the ring to the target beam transport line(RTBT) and the ring to the dump beam transport line(RDBT), are consisted of an ICT and three FCTs manufactured by Bergoz. The electronics includes a set of NI PXIe-5160 oscilloscope digitizer, and a Beam Charge Monitor(BCM) from Bergoz as supplementary. The beam charge monitors provide the following information: a) the quantity of protons bombarded the tungsten target; b) the efficiency of particle transportation; c) a T0 signal to the detectors and spectrometers of the white neutron source. With the calibration with an octopus 50Ω terminator in lab and an onboard 16-turn calibrating coils at the local control room, corrections for the introducing the 16-turn calibrating coils and the long cable were made. An accuracy of ±2% for the beam charge measurement during the machine operation has been achieved with the ICT/FCTs and a PXIe-5160 oscilloscope digitizer.

Poster MOPC04 [3.082 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOPC04

About •

paper received ※ 04 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPC06

Comparative Measurement and Characterisation of Three Cryogenic Current Comparators Based on Low-Temperature Superconductors

cryogenics, pick-up, antiproton, proton

126

V. Tympel, T. Stöhlker
HIJ, Jena, Germany
H. De Gersem, N. Marsic, W.F.O. Müller
TEMF, TU Darmstadt, Darmstadt, Germany
M.F. Fernandes, C.P. Welsch
Cockcroft Institute, Warrington, Cheshire, United Kingdom
M.F. Fernandes, J. Tan
CERN, Geneva, Switzerland
M.F. Fernandes, C.P. Welsch
The University of Liverpool, Liverpool, United Kingdom
J. Golm, R. Neubert, F. Schmidl, P. Seidel
FSU Jena, Jena, Germany
D.M. Haider, F. Kurian, M. Schwickert, T. Sieber, T. Stöhlker
GSI, Darmstadt, Germany
R. Neubert
Thuringia Observatory Tautenburg, Tautenburg, Germany
M. Schmelz, R. Stolz
IPHT, Jena, Germany
T. Stöhlker
IOQ, Jena, Germany
V. Zakosarenko
Supracon AG, Jena, Germany

Funding: Supported by the BMBF, project numbers 05P15SJRBA and 05P18SJRB1.
A Cryogenic Current Comparator (CCC) is a non-destructive, metrological-traceable charged particle beam intensity measurement system for the nano-ampere range. Using superconducting shielding and coils, low temperature Superconducting Quantum Interference Devices (SQUIDs) and highly permeable flux-concentrators, the CCC can operate in the frequency range from DC to several kHz or hundreds of kHz depending on the requirement of the application. Also, the white noise level can be optimized down to 2 pA/sqrt(Hz) at 2.16 K. This work compares three different Pb- and Nb-based CCC-sensors developed at the Institute of Solid State Physics and Leibniz Institute of Photonic Technology at Jena, Germany: CERN-Nb-CCC, optimized for applica-tion at CERN Antiproton Decelerator (AD) in 2015 with a free inner diameter of 185 mm; GSI-Pb-CCC, designed for GSI-Darmstadt with a free inner diameter of 145 mm, 1996 completed, 2014 upgraded; GSI-Nb-CCC-XD, de-signed for the GSI/FAIR-project with a free inner diame-ter of 250 mm, 2017 completed. The results of noise, small-signal, slew-rate, and drift measurements done 2015 and 2018 in the Cryo-Detector Lab at the University of Jena are presented here.

Poster MOPC06 [2.150 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOPC06

About •

paper received ※ 05 September 2018 paper accepted ※ 14 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPC10

Upgrade and Improvement of CT Based on TMR

electron, simulation, vacuum, power-supply

134

Y. Zhao, Y.Y. Du, L. Wang
IHEP, Beijing, People’s Republic of China

The CT based on TMR sensor has been developed in the lab. For Improving the accuracy and linearity, re-ducing the influence of sensor position, a series simu-lation and calculation have been done which conduct an upgrade both in the mechanical structure and elec-tronics design. Lab test shows good results and test on beam will be carried on soon.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOPC10

About •

paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUOC03

Commissioning of the Open Source Sirius BPM Electronics

electron, controls, FPGA, timing

196

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

The new Brazilian 4th generation light source, Sirius, have already started and commissioning is planned to start in 2018. This paper will report on the manufacturing, deployment and production batch testing of the in-house developed BPM electronics. The latest performance and reliability achievements will be presented.

Slides TUOC03 [14.606 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUOC03

About •

paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUOC04

Development of Beam Position Monitor for the SPring-8 Upgrade

electron, radiation, storage-ring, brilliance

204

H. Maesaka
RIKEN SPring-8 Center, Innovative Light Sources Division, Hyogo, Japan
H. Dewa, T. Fujita, M. Masaki, S. Takano
JASRI, Hyogo, Japan

We are developing a new electron beam position monitor (BPM) system for the low-emittance upgrade of SPring-8. The requirements for the BPM system are: (1) a single-pass resolution of 100 µm rms for a 100 pC bunch and an electric center accuracy of 100 µm rms for the initial beam commissioning to achieve the first turn, (2) a closed-orbit distortion (COD) resolution better than 0.1 µm rms for a 100 mA stored beam and a position stability of less than 5 µm for the ultimate stability of a photon beam axis. We have completed prototypes of a precise button electrode and a BPM block to obtain high-intensity signals and sufficient mechanical accuracy while suppressing high-Q trapped modes leading to impedance and heating issues. The development of readout electronics based on the MTCA.4 standard and the evaluation of radiation-hard coaxial cables have also been conducted. The prototype BPM head was installed in the present SPring-8 storage ring for performance verification with an actual electron beam. We confirmed sufficient signal intensity, electric center accuracy, position stability, etc. by the beam test. The new BPM system is almost ready for the SPring-8 upgrade.

Slides TUOC04 [2.126 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUOC04

About •

paper received ※ 06 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPB01

The Installation and Commissioning of the AWAKE Stripline BPM

electron, proton, MMI, TRIUMF

253

S. Liu, P.E. Dirksen, V.A. Verzilov
TRIUMF, Vancouver, Canada
S.J. Gessner, F. Guillot-Vignot, D. Medina, L. Søby
CERN, Geneva, Switzerland

Funding: # TRIUMF contribution was supported by NSERC and CNRC
AWAKE (The Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN) stripline BPMs are required to measure the position of the single electron bunch to a position resolution of less than 10 µm rms for electron charge of 100 pC to 1 nC. This paper describes the design, installation and commissioning of a such BPM system developed by TRIUMF (Canada). Total 12 BPMs and electronics had been installed on AWAKE beam lines and started commissioning since Fall of 2017. The calibration and measurement performance are also reviewed.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPB01

About •

paper received ※ 04 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPB02

Complete Test Results of New BPM Electronics for the ESRF New LE-Ring

electron, SRF, controls, MMI

257

K.B. Scheidt
ESRF, Grenoble, France

Among the 320 BPMs in the ESRF new low emittance ring, a set of 128 units will be equipped with new electronics, while the other set (192) will be served by the existing Libera-Brilliance electronics. These new electronics are an upgraded version of the low-cost Spark electronics originally developed 3 years ago for the ESRF Injector complex. All these 128 units have been installed in the first half of 2018 on existing BPM signals (through duplication with RF-splitters) and subsequently been tested thoroughly for performance characteristics like stability, resolution and reliability. It will be shown that while these Sparks have a very straightforward and simple concept, i.e. completely omitting calibration schemes like RF-cross-bar switching, pilot-tone introduction or active temperature control, that they are fully compatible with all the beam position measurement requirements of this new ring.

Poster TUPB02 [1.577 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPB02

About •

paper received ※ 30 August 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPB03

Results of SPIRAL2 Beam Position Monitors on the Test Bench of the RFQ

linac, operation, electron, rfq

261

M. Ben Abdillah, P. Ausset
IPN, Orsay, France
R. Ferdinand
GANIL, Caen, France

SPIRAL2 project is based on a multi-beam superconducting LINAC designed to accelerate 5 mA deuteron beams up to 40 MeV, proton beams up to 33 MeV and 1 mA light and heavy ions (Q/A = 1/3) up to 14.5 MeV/A. The accurate tuning of the LINAC is essential for the operation of SPIRAL2 and requires measurement of the beam transverse position, the phase of the beam with respect to the radiofrequency voltage, the ellipticity of the beam and the beam energy with the help of Beam Position Monitor (BPM) system. The commissioning of the RFQ gave us the opportunity to install two BPM sensors, associated with their electronics, mounted on a test bench. The test bench is a D-plate fully equipped with a complete set of beam diagnostic equipment in order to characterize as completely as possible the beam delivered by the RFQ and to gain experience with the behavior of these diagnostics under beam operation. This paper addresses the measurements carried with the two BPMs on the Dplate: energy, transverse position and ellipticity under 750 KeV proton beam operation

Poster TUPB03 [1.443 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPB03

About •

paper received ※ 04 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPB13

Stability Tests with Pilot-Tone Based Elettra BPM RF Front End and Libera Electronics

electron, real-time, instrumentation, FPGA

289

M. Cargnelutti, P. Leban, M. Žnidarčič
I-Tech, Solkan, Slovenia
S. Bassanese, G. Brajnik, S. Cleva, R. De Monte
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

Long-term stability is one of the most important properties of the BPM readout system. Recent developments on pilot tone capable front end have been tested with an established BPM readout electronics. The goal was to demonstrate the effectiveness of the pilot tone compensation to varying external conditions. Simulated cable attenuation change and temperature variation of the readout electronics were confirmed to have no major effect to position data readout. The output signals from Elettra front end (carrier frequency and pilot tone frequency) were processed by a Libera Spark with the integrated standard front end which contains several filtering, attenuation and amplification stages. Tests were repeated with a modified instrument (optimized for pilot tone) to compare the long-term stability results. Findings show the pilot tone front end enables great features like self-diagnostics and cable-fault compensation as well as small improvement in the long-term stability. Measurement resolution is in range of 10 nanometers RMS in 5 Hz bandwidth.

Poster TUPB13 [1.223 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPB13

About •

paper received ※ 31 August 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPC03

Beam Quality Monitoring System in the HADES Experiment at GSI Using CVD Diamond Material

detector, monitoring, electron, experiment

300

A. Rost, T. Galatyuk
TU Darmstadt, Darmstadt, Germany
J. Adamczewski-Musch, S. Linev, J. Pietraszko, M. Traxler
GSI, Darmstadt, Germany

Funding: Work supported by the DFG through GRK 2128 and VH-NG-823.
The beam quality monitoring of extracted beams from SIS18, transported to the HADES experiment, is of great importance to ensure high efficiency data recording. The main detector system used for this purpose is the Start-Veto system which consists of two diamond based sensors made of pcCVD and scCVD materials. Both sensors are equipped with a double-sided strip segmented metalization (300 µm width) which allows a precise position determination of the beam position. Those senors are able to deliver a time precision <100 ps and can handle rate capabilities up to 10⁷ particles/channel. The read-out of the sensors is based on the TRB3 system [1]. Precise FPGA-TDCs (264 channels, <10 ps RMS) are implemented inside FPGAs. The TRB3 system serves as data acquisition system with scaler capability. Analysis and on-line visualization will be performed in DABC [2]. Having the precise time measurement and a precise position information of the incoming beam ions one can monitor important beam parameters namely the beam intensity, its position during extraction and the beam time structure. In this contribution the general read-out concept will be introduced.
[1] A. Neiser et al., TRB3: a 264 channel high precision TDC platform and its applications, 2013 JINST 8 C12043.
[2] dabc.gsi.de, 30.05.2018

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPC03

About •

paper received ※ 05 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPC04

BPM System Upgrade at COSY

controls, EPICS, electron, operation

303

V. Kamerdzhiev, I. Bekman, C. Böhme, B. Lorentz, S. Merzliakov, P. Niedermayer, K. Reimers, M. Simon, M. Thelen
FZJ, Jülich, Germany

The beam position monitoring system of the Cooler Synchrotron (COSY) has been upgraded in 2017. The upgrade was driven by the requirement of the JEDI collaboration to significantly improve the orbit control and by the electronics approaching end-of-life. The entire signal processing chain has been replaced. The new low noise amplifiers, mounted directly on the BPM vacuum feedthroughs, were developed in-house and include adjustable gain in 80 dB rage and in-situ test and calibration capabilities. The signals are digitized and processed by means of commercial BPM signal processing units featuring embedded EPICS IOC. The decision path, technical details of the upgrade and performance of the new system are presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPC04

About •

paper received ※ 13 September 2018 paper accepted ※ 14 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPC07

First Results of Button BPMs at FRIB

electron, linac, MMI, pick-up

311

S. Cogan, J.L. Crisp, T.M. Ford, S.M. Lidia
FRIB, East Lansing, USA

Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University.
Commissioning and tuning the linac driver for the Facility for Rare Isotope Beams (FRIB) requires a large network of warm and cryogenic BPMs, with apertures of 40 - 150 mm, sensitivity to beam currents of 100 nA to 1 mA, and accurate for beams with velocities as low as 0.03c. We present initial results of the BPM system, analog and digital signal processing, distortion and error correction, and calibration for time of flight (TOF) measurements. Measurements for low energy beams are presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPC07

About •

paper received ※ 13 September 2018 paper accepted ※ 20 November 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEOB02

RadFET Dose Monitor System for SOLEIL

radiation, electron, storage-ring, vacuum

353

N. Hubert, F. Dohou, M. El Ajjouri, D. Pédeau
SOLEIL, Gif-sur-Yvette, France

Soleil is currently testing new dose monitors based on RadFET transistors. This new detector at SOLEIL will provide a measurement of the dose received by equipment that are damaged by the radiations in the storage ring, and to anticipate their replacement. This monitor should be very compact to be placed in tiny areas, sensitive to all kind of radiation and low cost to install many of them around the ring. A readout electronic module is being developed in-house, and a first prototype has been build and installed on the machine. Description of the system and first results recorded on the machine are presented.

Slides WEOB02 [4.250 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEOB02

About •

paper received ※ 05 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPA07

Beam Phase Measurement System in CSNS Linac

linac, DTL, rfq, MMI

386

P. Li, J. Peng
IHEP CSNS, Guangdong Province, People’s Republic of China
F. Li, T.G. Xu
IHEP, Beijing, People’s Republic of China
M. Meng
DNSC, Dongguan, People’s Republic of China
W. Peng
CETC, Shushan, People’s Republic of China

We developed beam phase measurement system ourselves in CSNS (China Spallation Neutron Source). The resolution of the system is less than 0.1° and the accuracy is less than 1°. It played a key role in CSNS Linac commissioning especially in RFQ and DTL commissioning. Further we measured the beam energy by TOF (Time of Flight) method base on this system. The energy accuracy is less than 0.1 MeV.

Poster WEPA07 [1.070 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPA07

About •

paper received ※ 04 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPA15

Development of BAM Electronics in PAL-XFEL

electron, pick-up, controls, site

400

D.C. Shin, J.H. Hong, H.-S. Kang, C. Kim, G. Kim, C.-K. Min
PAL, Pohang, Republic of Korea

We describe an electronics for electron bunch arrival time monitor (BAM) with a less than 10 femtosecond resolution, which was developed in 2017 and is currently in use at PAL-XFEL. When electron bunches go through an S-band monopole cavity, about 1 us long RF signal can be obtained to compare with a low phase noise RF reference. The differential phase jitter corresponds to the arrival time jitter of electron bunches. RF front-end (F/E) which converts the S-band pickup signal to intermediate frequency (IF) signal, is the essential part of a good time resolution. The digitizer and the signal processor of the BAM electronics are installed in an MTCA platform. This paper presents the design scheme, test results of the BAM electronics and future improvement plans.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPA15

About •

paper received ※ 05 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPB15

A Multipurpose Scintillating Fibre Beam Monitor for the Measurement of Secondary Beams at CERN

experiment, detector, electron, secondary-beams

468

I. Ortega Ruiz, L. Fosse, J. Franchi, A. Frassier, J. Fullerton, J. Kral, J. Lauener, T. Schneider, J. Spanggaard, G. Tranquille
CERN, Meyrin, Switzerland

A scintillating fibre beam monitor has been developed at CERN for the measurement of low energy and low intensity secondary beams. This monitor can track the passage of individual particles up to intensities of 10⁷ particles per second per mm², over an active area of 20 cm x 20 cm, and with a spatial resolution of 1 mm. Thanks to an external trigger system, the achieved detection efficiency is 95% and the noise level is kept below 10^-4 events/second. The simple design of this monitor avoids the common production difficulties of scintillating fibre detectors and makes its maintenance easier, when compared to other tracking detectors, due to the absence of gas or cooling. Using special electronics, a version of the monitor can also be used for time-of-flight measurements, achieving a time resolution of 900 ps. Thanks to its versatility, the monitor will perform several functions when measuring the secondary beams of the CERN Neutrino Platform: beam profile, position and intensity measurement, magnetic momentum spectrometry, particle identification through time-of-flight, and trigger generation for the experiments.

Poster WEPB15 [1.172 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPB15

About •

paper received ※ 03 September 2018 paper accepted ※ 14 September 2018 issue date ※ 29 January 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)