IBIC2019 - List of Keywords (electronics)

Paper	Title	Other Keywords	Page
MOPP003	Beam Current Measurements with Sub-Microampere Resolution using CWCT and BCM-CW-E	linac, instrumentation, electron, acceleration	63
	F. Stulle, L. Dupuy, E.T. Touzain BERGOZ Instrumentation, Saint Genis Pouilly, France W.A. Barth, P. Forck, M. Miski-Oglu, T. Sieber GSI, Darmstadt, Germany
	The CWCT current transformer and its accompanying BCM-CW-E electronics allow accurate, high-resolution beam current measurements. This is achieved by combining a high-droop current transformer with low-noise sample-and-hold electronics. Thanks to a fast response time on the microseconds level the system can be applied not only to CW beams but also macropulses. Pulse repetition rates may range from 10MHz to 500MHz, rendering CWCT and BCM-CW-E suitable for a wide variety of accelerators. We report on test bench measurements achieving sub-microampere resolution. And we discuss results of beam measurements performed at the cwLINAC (GSI), which confirm the expected performance.
	Poster MOPP003 [6.507 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP003
About •	paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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MOPP011	A Dual Functional Current Monitor for Stripping Efficiency Measurement in CSNS	electron, injection, proton, shielding	96
	W.L. Huang, F. Li, R.Y. Qiu, A.X. Wang IHEP CSNS, Guangdong Province, People’s Republic of China M.Y. Huang, M.Y. Liu, T.G. Xu IHEP, Beijing, People’s Republic of China
	Funding: This work is supported by National Natural Science Fund(No.11605214). China Spallation Neutron Source (CSNS), the biggest platform for neutron scattering research in China, has been finished construction and already in user operation stage by the end of 2017. During the multi-turn charge-exchange injection, H⁻ stripping by a carbon primary stripper foil (100 ¿g/cm²) and a secondary stripper foil (200 ¿g/cm²) is adopted for this high intensity proton synchrotron. In order to evaluate the stripping efficiency and the foil aging, a dual-function low noise current transformer and corresponding electronics are designed to measure the ultra-low intensity of H⁻ and H⁰, which are not stripped completely by the 1st foil but totally stripped charge changing to H⁺ and delivered to the IN-DUMP. The self-designed CT sensors made of domestic nanocrystalline toroids, the noise analysis and elimination, measurement results and further improvement proposals are presented in this paper.
	Poster MOPP011 [3.186 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP011
About •	paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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MOPP012	Development of Compact Ionization Chambers for Particle Therapy Facilities	proton, electron, radiation, high-voltage	100
	M. Liu, C.X. Yin SSRF, Shanghai, People’s Republic of China
	Dose monitors and position monitors are critical equipment for particle therapy facilities. Performance of the monitors affects precision of irradiation dose and dose distribution. Parallel plate ionization chambers with free air are adopted for dose monitors and position monitors. Radiation-hardened front-end electronics are integrated in the chambers, and the output of the chambers are digital signals. The structure of the monitors is compact, modularized and easy-to-use. The ionization chambers are implemented successfully in Shanghai Advanced Proton Therapy Facility. The development details and implementation status are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP012
About •	paper received ※ 02 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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MOPP017	New Beam Loss Monitor System at SOLEIL	detector, storage-ring, electron, injection	118
	N. Hubert, M. El Ajjouri, D. Pédeau SOLEIL, Gif-sur-Yvette, France
	SOLEIL is currently upgrading its Beam Loss Monitor (BLM) system from pin-diode detectors to plastic scintillators associated with photosensor modules. This new kind of monitor, associated to its dedicated electronics, can be used to record slow or fast losses. Monitors have been calibrated with a diode and with a Cesium source. Both methods are compared. After preliminary tests, a first set of 20 new BLMs have been installed on 2 cells of the storage ring. Installation setup, calibration procedure and first measurements will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP017
About •	paper received ※ 04 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019
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MOPP030	Preliminary Test of XBPM Local Feedback in TPS	feedback, electron, photon, operation	163
	P.C. Chiu, J.-Y. Chuang, K.T. Hsu, K.H. Hu, C.H. Huang NSRRC, Hsinchu, Taiwan
	TPS is 3-GeV synchrotron light source which have opened for public users since September 2016 and now offers 400 mA top-up mode operation. The requirements of the long term orbit stability have been gradually more and more stringent. The report investigates the long-term orbit stability improved by applying local XBPM feedback.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP030
About •	paper received ※ 02 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019
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TUPP034	Analysis of Quadrupolar Measurements for Beam Size Determination in the LHC	emittance, electron, pick-up, multipole	397
	D. Alves, M. Gąsior, T. Lefèvre CERN, Meyrin, Switzerland
	Due to limitations with non-invasive beam size diagnostics in the LHC, particularly during the energy ramp, there has been an interest to explore quadrupolar-based measurements for estimating the transverse beam size, and hence determining the transverse emittance. This technique is especially attractive as it is completely passive and can use the existing beam position instrumentation. In this work, we perform an analysis of this method and present recent measurements taken during energy ramps. Quadrupolar-based measurements are compared with wire-scanner measurements and a calibration strategy is proposed to overcome present limitations.
	Poster TUPP034 [0.897 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP034
About •	paper received ※ 03 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019
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WEAO01	Technological Review of Beam Position Button Design and Manufacture	resonance, FEL, electron, simulation	448
	A.F.D. Morgan DLS, Oxfordshire, United Kingdom
	A workshop in May 2019, hosted by DLS (UK), reviewed both the design and the manufacturing aspects of beam position monitor (BPM) pick-up buttons with an integrated UHV feedthrough and coaxial connector. The UHV feedthrough technology (e.g. ceramic brazing vs glass-sealing), the limits on mechanical tolerances, reproducibility and material choices for high reliability were examined by more than 20 diagnostics users of these devices and a number of reputed manufacturers. Calibration techniques and tools and methods for inspection & testing were also assessed. This talk will present the outcome & conclusions of this workshop and identify challenges and opportunities for future BPM manufacture.
	Slides WEAO01 [1.824 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEAO01
About •	paper received ※ 05 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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WEAO02	Pile-Up Effect of Cold Button BPMs in the European XFEL Accelerator	resonance, cavity, FEL, electron	453
	D. Lipka, B. Lorbeer DESY, Hamburg, Germany
	The European XFEL facility is in operation with a maximum of 2700 bunches in one train. The highest bunch repetition rate is 4.5 MHz; this corresponds to a minimum time separation of 222 ns. The measurement of the beam properties for each bunch in a train is required. Therefore the beam position monitor (BPM) system needs to separate the signals from each bunch. All BPM types (button, re-entrant and cavity) fulfill this requirement except a few button BPMs installed inside of the cold accelerator module, where Pile-Up from the train can be observed. To identify the cause of this effect we measured the S-parameters during a shutdown of the accelerator, compared it with a similar BPM at the FLASH accelerator but located in a warm section and finally measured the spectrum of the button signal during beam operation. As a result, resonances were found at about 2.46 GHz with relatively high quality factor that remains within the frequency range accepted by the electronics.
	Slides WEAO02 [5.621 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEAO02
About •	paper received ※ 04 September 2019 paper accepted ※ 09 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, controls, 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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WEBO03	Development of MTCA.4-Based BPM Electronics for SPring-8 Upgrade	electron, FPGA, LLRF, low-level-rf	471
	H. Maesaka, T. Fukui RIKEN SPring-8 Center, Innovative Light Sources Division, Hyogo, Japan H. Dewa, T. Fujita, M. Masaki, C. Saji, S. Takano JASRI/SPring-8, Hyogo-ken, Japan
	We have developed a new button-BPM readout electronics based on the MTCA.4 standard for the low-emittance upgrade of SPring-8 []. Requirements for the BPM system are a high single-pass BPM resolution of better than 100 µm for a 100 pC injected bunch to achieve first-turn steering in the commissioning of the upgraded ring and a highly stable COD BPM within 5 µm error for 1 month to maintain the optical axis of brilliant x-rays for users []. We designed an rf front-end rear transition module (RTM) having band-pass filters, low-noise amplifiers, step attenuators, and calibration tone generators. The rf signal is detected by a 16-bit 370 MSPS high-speed digitizer advanced mezzanine card (AMC) developed for the new low-level rf system of SPring-8 [*]. The firmware of the FPGA on the digitizer AMC was newly developed to implement various functions of the BPM system. We evaluated the readout system at a laboratory and then tested at the present SPring-8 storage ring with a prototype BPM head for the SPring-8 upgrade. We confirmed that the new readout system satisfies the requirements for the single-pass BPM resolution and the COD BPM stability. SPring-8-II Conceptual Design Report, http://rsc.riken.jp/pdf/SPring-8-II.pdf H. Maesaka et al., Proc. IBIC¿18, paper TUOC04. * T. Ohshima et al., Proc. IPAC¿17, paper THPAB117.
	Slides WEBO03 [3.340 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEBO03
About •	paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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WEPP002	Development of a Low-beta BPM for MYRTE Project	quadrupole, electron, rfq, linac	504
	M. Ben Abdillah, P. Blache, F. Fournier, H. Kraft Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
	MYRTE (MYRRHA Research Transmutation Endeavour) performs research to support the development of the MYRRHA (Multi-Purpose Hybrid Research Reactor for High-Tech Applications) research facility, which aims to demonstrate the feasibility of high-level nuclear waste transmutation at industrial scale. MYRRHA Facility aims to accelerate 4mA proton beam up to 100 MeV. The accurate tuning of LINAC is essential for the operation of MYRRHA and requires measurement of the beam transverse position and shape , the phase of the beam with respect to the radiofrequency voltage with the help of Beam Position Monitor (BPM) system. MYRTE aims to qualify beam operation at 1.5MeV. Two BPMs were realized for MYRTE operation. This paper addresses the design, realization, and calibration of these two BPMs and their associated electronics. The characterization of the beam shape is performed by means of a test bench allowing a position mapping with a resolution of 0.02mm.
	Poster WEPP002 [1.082 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP002
About •	paper received ※ 27 August 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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WEPP005	BPM Resolution Studies at PETRA III	brilliance, electron, optics, pick-up	517
	G. Kube, J. Neugebauer, F. Schmidt-Föhre DESY, Hamburg, Germany
	In order to measure the noise level of a BPM system from beam generated orbit data, the correlated beam jitter has to be removed from the position signals. There exist different ways to extract the BPM noise, as the "three-BPM" correlation method or the model-independent principal components analysis (PCA). Both methods will shortly be reviewed. Based on a PCA, the resolution of the PETRA III Libera Brilliance based BPM system was measured. The results will be presented together with first measurements in view of an updated BPM system for the future PETRA IV project at DESY.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP005
About •	paper received ※ 02 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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WEPP013	Beam Commissioning of Beam Position and Phase Monitors for LIPAc	electron, pick-up, MMI, MEBT	534
	I. Podadera, D. Gavela, A. Guirao, D. Jiménez-Rey, L.M. Martínez, J. Mollá, C. Oliver, R. Varela, V. Villamayor CIEMAT, Madrid, Spain T. Akagi, K. Kondo, Y. Shimosaki, T. Shinya, M. Sugimoto QST, Aomori, Japan L. Bellan, M. Comunian, F. Grespan, F. Scantamburlo INFN/LNL, Legnaro (PD), Italy P. Cara IFMIF/EVEDA, Rokkasho, Japan Y. Carin, H. Dzitko, D. Gex, A. Jokinen, I.M. Moya F4E, Germany A. Marqueta Fusion for Energy, Garching, Germany A. Rodríguez Páramo ESS Bilbao, Zamudio, Spain
	Funding: Work partially supported by the Spanish Ministry of Science and Innovation under project AIC-A-2011-0654 and FIS2013-40860-R The LIPAc accelerator is 9-MeV, 125-mA CW deuteron accelerator that aims to validate the technology that will be used in the future IFMIF accelerator (40-MeV, 2 x 125-mA CW). LIPAc is presently under beam commissioning of the second acceleration stage (injector and Radio Frequency Quadrupole) at 5 MeV. In this stage two types of BPM¿s are used: four stripline-type to control the transverse position and phase at the Medium Energy Beam Transport line (MEBT), and three other stripline-type mainly for the precise measurements of the mean beam energy at the Diagnostics Plate. All the BPM¿s have been successfully tested and served to increase the duty cycle and the average power of the beam delivered down to the beam dump. Moreover, the BPM¿s were key devices for the transverse beam positioning and longitudinal beam tuning and validation of the RFQ and re-buncher cavities at the MEBT. In this contribution, an overview of the beam position monitors system installation and characterization in the facility will be reported. First tests of the system with the upgraded acquisition electronics for the next phase will be also presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP013
About •	paper received ※ 04 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019
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WEPP015	ESS Beam Position and Phase Monitor System	electron, linac, FPGA, controls	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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WEPP017	Current Monitor and Beam Position Monitor Performance for High Charge Operation of the Advanced Photon Source Particle Accumulator Ring	injection, electron, extraction, accumulation	552
	A.R. Brill, J.R. Calvey, K.C. Harkay, R.T. Keane, N. Sereno, U. Wienands, K.P. Wootton, C. Yao ANL, Lemont, Illinois, USA
	Funding: Work supported by U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. A design choice for the Advanced Photon Source Upgrade to inject into the storage ring using bunch swap out rather than off-axis accumulation means that the Advanced Photon Source injectors are required to accelerate much higher electron bunch charge than originally designed. In the present work, we outline upgrades to the current monitor and beam position monitor diagnostics for the Particle Accumulator Ring to accommodate bunch charges of 1-20 nC. Through experiments, we compare and characterize the system responses over the range of bunch charge.
	Poster WEPP017 [3.163 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP017
About •	paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
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WEPP044	Beam Position Monitoring System for Fermilab’s Muon Campus	electron, pick-up, proton, timing	648
	N. Patel, J.S. Diamond, N. Eddy, C.R. McClure, P.S. Prieto, D.C. Voy Fermilab, Batavia, Illinois, USA
	A Beam Position Monitor (BPM) system has been designed for Fermilab Muon Campus. The BPM system measures Turn-by-Turn orbits as well as Closed Orbits (average of multiple turns). While in the early commissioning phase of this program, preliminary measurements have been made using these BPMs. This paper discusses the design and implementation of these BPMs.
	Poster WEPP044 [0.612 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP044
About •	paper received ※ 09 September 2019 paper accepted ※ 12 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	electron, pick-up, controls, 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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THAO03	ROSE - a Rotating 4D Emittance Scanner	emittance, MMI, software, quadrupole	669
	M.T. Maier, L. Groening, C. Xiao GSI, Darmstadt, Germany A. Bechtold NTG, Gelnhausen, Germany J.M. Maus NTG Neue Technologien GmbH & Co KG, Gelnhausen, Germany
	The detector system ROSE, allowing to perform 4D emittance measurements on heavy ion beams independent of their energy and time structure, has been built and successfully commissioned in 2016 at GSI in Darmstadt, Germany. This method to measure the four dimensional emittance has then been granted a patent in 2017. The inventors together with the technology transfer department of GSI have found an industrial partner to modify ROSE into a fully standalone, mobile emittance scanner system. This is a three step process involving the ROSE hardware, the electronics ROBOMAT and the software working packages. The electronics was commissioned at the ECR test bench of the Heidelberg ion therapy facility HIT in June 2019. Currently our main focus is on the development of the 4D software package ROSOFT. This contribution presents the actual status and introduces the multiple possibilities of this 4D emittance scanner.
	Slides THAO03 [26.411 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-THAO03
About •	paper received ※ 03 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
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Paper

Title

Other Keywords

Page

MOPP003

Beam Current Measurements with Sub-Microampere Resolution using CWCT and BCM-CW-E

linac, instrumentation, electron, acceleration

63

F. Stulle, L. Dupuy, E.T. Touzain
BERGOZ Instrumentation, Saint Genis Pouilly, France
W.A. Barth, P. Forck, M. Miski-Oglu, T. Sieber
GSI, Darmstadt, Germany

The CWCT current transformer and its accompanying BCM-CW-E electronics allow accurate, high-resolution beam current measurements. This is achieved by combining a high-droop current transformer with low-noise sample-and-hold electronics. Thanks to a fast response time on the microseconds level the system can be applied not only to CW beams but also macropulses. Pulse repetition rates may range from 10MHz to 500MHz, rendering CWCT and BCM-CW-E suitable for a wide variety of accelerators. We report on test bench measurements achieving sub-microampere resolution. And we discuss results of beam measurements performed at the cwLINAC (GSI), which confirm the expected performance.

Poster MOPP003 [6.507 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP003

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

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MOPP011

A Dual Functional Current Monitor for Stripping Efficiency Measurement in CSNS

electron, injection, proton, shielding

96

W.L. Huang, F. Li, R.Y. Qiu, A.X. Wang
IHEP CSNS, Guangdong Province, People’s Republic of China
M.Y. Huang, M.Y. Liu, T.G. Xu
IHEP, Beijing, People’s Republic of China

Funding: This work is supported by National Natural Science Fund(No.11605214).
China Spallation Neutron Source (CSNS), the biggest platform for neutron scattering research in China, has been finished construction and already in user operation stage by the end of 2017. During the multi-turn charge-exchange injection, H⁻ stripping by a carbon primary stripper foil (100 ¿g/cm²) and a secondary stripper foil (200 ¿g/cm²) is adopted for this high intensity proton synchrotron. In order to evaluate the stripping efficiency and the foil aging, a dual-function low noise current transformer and corresponding electronics are designed to measure the ultra-low intensity of H⁻ and H⁰, which are not stripped completely by the 1st foil but totally stripped charge changing to H⁺ and delivered to the IN-DUMP. The self-designed CT sensors made of domestic nanocrystalline toroids, the noise analysis and elimination, measurement results and further improvement proposals are presented in this paper.

Poster MOPP011 [3.186 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP011

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

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MOPP012

Development of Compact Ionization Chambers for Particle Therapy Facilities

proton, electron, radiation, high-voltage

100

M. Liu, C.X. Yin
SSRF, Shanghai, People’s Republic of China

Dose monitors and position monitors are critical equipment for particle therapy facilities. Performance of the monitors affects precision of irradiation dose and dose distribution. Parallel plate ionization chambers with free air are adopted for dose monitors and position monitors. Radiation-hardened front-end electronics are integrated in the chambers, and the output of the chambers are digital signals. The structure of the monitors is compact, modularized and easy-to-use. The ionization chambers are implemented successfully in Shanghai Advanced Proton Therapy Facility. The development details and implementation status are presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP012

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

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MOPP017

New Beam Loss Monitor System at SOLEIL

detector, storage-ring, electron, injection

118

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

SOLEIL is currently upgrading its Beam Loss Monitor (BLM) system from pin-diode detectors to plastic scintillators associated with photosensor modules. This new kind of monitor, associated to its dedicated electronics, can be used to record slow or fast losses. Monitors have been calibrated with a diode and with a Cesium source. Both methods are compared. After preliminary tests, a first set of 20 new BLMs have been installed on 2 cells of the storage ring. Installation setup, calibration procedure and first measurements will be presented.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP017

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

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MOPP030

Preliminary Test of XBPM Local Feedback in TPS

feedback, electron, photon, operation

163

P.C. Chiu, J.-Y. Chuang, K.T. Hsu, K.H. Hu, C.H. Huang
NSRRC, Hsinchu, Taiwan

TPS is 3-GeV synchrotron light source which have opened for public users since September 2016 and now offers 400 mA top-up mode operation. The requirements of the long term orbit stability have been gradually more and more stringent. The report investigates the long-term orbit stability improved by applying local XBPM feedback.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP030

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paper received ※ 02 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019

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TUPP034

Analysis of Quadrupolar Measurements for Beam Size Determination in the LHC

emittance, electron, pick-up, multipole

397

D. Alves, M. Gąsior, T. Lefèvre
CERN, Meyrin, Switzerland

Due to limitations with non-invasive beam size diagnostics in the LHC, particularly during the energy ramp, there has been an interest to explore quadrupolar-based measurements for estimating the transverse beam size, and hence determining the transverse emittance. This technique is especially attractive as it is completely passive and can use the existing beam position instrumentation. In this work, we perform an analysis of this method and present recent measurements taken during energy ramps. Quadrupolar-based measurements are compared with wire-scanner measurements and a calibration strategy is proposed to overcome present limitations.

Poster TUPP034 [0.897 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP034

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

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WEAO01

Technological Review of Beam Position Button Design and Manufacture

resonance, FEL, electron, simulation

448

A.F.D. Morgan
DLS, Oxfordshire, United Kingdom

A workshop in May 2019, hosted by DLS (UK), reviewed both the design and the manufacturing aspects of beam position monitor (BPM) pick-up buttons with an integrated UHV feedthrough and coaxial connector. The UHV feedthrough technology (e.g. ceramic brazing vs glass-sealing), the limits on mechanical tolerances, reproducibility and material choices for high reliability were examined by more than 20 diagnostics users of these devices and a number of reputed manufacturers. Calibration techniques and tools and methods for inspection & testing were also assessed. This talk will present the outcome & conclusions of this workshop and identify challenges and opportunities for future BPM manufacture.

Slides WEAO01 [1.824 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEAO01

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

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WEAO02

Pile-Up Effect of Cold Button BPMs in the European XFEL Accelerator

resonance, cavity, FEL, electron

453

D. Lipka, B. Lorbeer
DESY, Hamburg, Germany

The European XFEL facility is in operation with a maximum of 2700 bunches in one train. The highest bunch repetition rate is 4.5 MHz; this corresponds to a minimum time separation of 222 ns. The measurement of the beam properties for each bunch in a train is required. Therefore the beam position monitor (BPM) system needs to separate the signals from each bunch. All BPM types (button, re-entrant and cavity) fulfill this requirement except a few button BPMs installed inside of the cold accelerator module, where Pile-Up from the train can be observed. To identify the cause of this effect we measured the S-parameters during a shutdown of the accelerator, compared it with a similar BPM at the FLASH accelerator but located in a warm section and finally measured the spectrum of the button signal during beam operation. As a result, resonances were found at about 2.46 GHz with relatively high quality factor that remains within the frequency range accepted by the electronics.

Slides WEAO02 [5.621 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEAO02

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paper received ※ 04 September 2019 paper accepted ※ 09 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, controls, 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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WEBO03

Development of MTCA.4-Based BPM Electronics for SPring-8 Upgrade

electron, FPGA, LLRF, low-level-rf

471

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

We have developed a new button-BPM readout electronics based on the MTCA.4 standard for the low-emittance upgrade of SPring-8 [*]. Requirements for the BPM system are a high single-pass BPM resolution of better than 100 µm for a 100 pC injected bunch to achieve first-turn steering in the commissioning of the upgraded ring and a highly stable COD BPM within 5 µm error for 1 month to maintain the optical axis of brilliant x-rays for users [**]. We designed an rf front-end rear transition module (RTM) having band-pass filters, low-noise amplifiers, step attenuators, and calibration tone generators. The rf signal is detected by a 16-bit 370 MSPS high-speed digitizer advanced mezzanine card (AMC) developed for the new low-level rf system of SPring-8 [***]. The firmware of the FPGA on the digitizer AMC was newly developed to implement various functions of the BPM system. We evaluated the readout system at a laboratory and then tested at the present SPring-8 storage ring with a prototype BPM head for the SPring-8 upgrade. We confirmed that the new readout system satisfies the requirements for the single-pass BPM resolution and the COD BPM stability.
* SPring-8-II Conceptual Design Report, http://rsc.riken.jp/pdf/SPring-8-II.pdf
** H. Maesaka et al., Proc. IBIC¿18, paper TUOC04.
*** T. Ohshima et al., Proc. IPAC¿17, paper THPAB117.

Slides WEBO03 [3.340 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEBO03

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

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WEPP002

Development of a Low-beta BPM for MYRTE Project

quadrupole, electron, rfq, linac

504

M. Ben Abdillah, P. Blache, F. Fournier, H. Kraft
Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France

MYRTE (MYRRHA Research Transmutation Endeavour) performs research to support the development of the MYRRHA (Multi-Purpose Hybrid Research Reactor for High-Tech Applications) research facility, which aims to demonstrate the feasibility of high-level nuclear waste transmutation at industrial scale. MYRRHA Facility aims to accelerate 4mA proton beam up to 100 MeV. The accurate tuning of LINAC is essential for the operation of MYRRHA and requires measurement of the beam transverse position and shape , the phase of the beam with respect to the radiofrequency voltage with the help of Beam Position Monitor (BPM) system. MYRTE aims to qualify beam operation at 1.5MeV. Two BPMs were realized for MYRTE operation. This paper addresses the design, realization, and calibration of these two BPMs and their associated electronics. The characterization of the beam shape is performed by means of a test bench allowing a position mapping with a resolution of 0.02mm.

Poster WEPP002 [1.082 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP002

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

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WEPP005

BPM Resolution Studies at PETRA III

brilliance, electron, optics, pick-up

517

G. Kube, J. Neugebauer, F. Schmidt-Föhre
DESY, Hamburg, Germany

In order to measure the noise level of a BPM system from beam generated orbit data, the correlated beam jitter has to be removed from the position signals. There exist different ways to extract the BPM noise, as the "three-BPM" correlation method or the model-independent principal components analysis (PCA). Both methods will shortly be reviewed. Based on a PCA, the resolution of the PETRA III Libera Brilliance based BPM system was measured. The results will be presented together with first measurements in view of an updated BPM system for the future PETRA IV project at DESY.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP005

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

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WEPP013

Beam Commissioning of Beam Position and Phase Monitors for LIPAc

electron, pick-up, MMI, MEBT

534

I. Podadera, D. Gavela, A. Guirao, D. Jiménez-Rey, L.M. Martínez, J. Mollá, C. Oliver, R. Varela, V. Villamayor
CIEMAT, Madrid, Spain
T. Akagi, K. Kondo, Y. Shimosaki, T. Shinya, M. Sugimoto
QST, Aomori, Japan
L. Bellan, M. Comunian, F. Grespan, F. Scantamburlo
INFN/LNL, Legnaro (PD), Italy
P. Cara
IFMIF/EVEDA, Rokkasho, Japan
Y. Carin, H. Dzitko, D. Gex, A. Jokinen, I.M. Moya
F4E, Germany
A. Marqueta
Fusion for Energy, Garching, Germany
A. Rodríguez Páramo
ESS Bilbao, Zamudio, Spain

Funding: Work partially supported by the Spanish Ministry of Science and Innovation under project AIC-A-2011-0654 and FIS2013-40860-R
The LIPAc accelerator is 9-MeV, 125-mA CW deuteron accelerator that aims to validate the technology that will be used in the future IFMIF accelerator (40-MeV, 2 x 125-mA CW). LIPAc is presently under beam commissioning of the second acceleration stage (injector and Radio Frequency Quadrupole) at 5 MeV. In this stage two types of BPM¿s are used: four stripline-type to control the transverse position and phase at the Medium Energy Beam Transport line (MEBT), and three other stripline-type mainly for the precise measurements of the mean beam energy at the Diagnostics Plate. All the BPM¿s have been successfully tested and served to increase the duty cycle and the average power of the beam delivered down to the beam dump. Moreover, the BPM¿s were key devices for the transverse beam positioning and longitudinal beam tuning and validation of the RFQ and re-buncher cavities at the MEBT. In this contribution, an overview of the beam position monitors system installation and characterization in the facility will be reported. First tests of the system with the upgraded acquisition electronics for the next phase will be also presented.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP013

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

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WEPP015

ESS Beam Position and Phase Monitor System

electron, linac, FPGA, controls

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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WEPP017

Current Monitor and Beam Position Monitor Performance for High Charge Operation of the Advanced Photon Source Particle Accumulator Ring

injection, electron, extraction, accumulation

552

A.R. Brill, J.R. Calvey, K.C. Harkay, R.T. Keane, N. Sereno, U. Wienands, K.P. Wootton, C. Yao
ANL, Lemont, Illinois, USA

Funding: Work supported by U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
A design choice for the Advanced Photon Source Upgrade to inject into the storage ring using bunch swap out rather than off-axis accumulation means that the Advanced Photon Source injectors are required to accelerate much higher electron bunch charge than originally designed. In the present work, we outline upgrades to the current monitor and beam position monitor diagnostics for the Particle Accumulator Ring to accommodate bunch charges of 1-20 nC. Through experiments, we compare and characterize the system responses over the range of bunch charge.

Poster WEPP017 [3.163 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP017

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

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WEPP044

Beam Position Monitoring System for Fermilab’s Muon Campus

electron, pick-up, proton, timing

648

N. Patel, J.S. Diamond, N. Eddy, C.R. McClure, P.S. Prieto, D.C. Voy
Fermilab, Batavia, Illinois, USA

A Beam Position Monitor (BPM) system has been designed for Fermilab Muon Campus. The BPM system measures Turn-by-Turn orbits as well as Closed Orbits (average of multiple turns). While in the early commissioning phase of this program, preliminary measurements have been made using these BPMs. This paper discusses the design and implementation of these BPMs.

Poster WEPP044 [0.612 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP044

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paper received ※ 09 September 2019 paper accepted ※ 12 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

electron, pick-up, controls, 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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THAO03

ROSE - a Rotating 4D Emittance Scanner

emittance, MMI, software, quadrupole

669

M.T. Maier, L. Groening, C. Xiao
GSI, Darmstadt, Germany
A. Bechtold
NTG, Gelnhausen, Germany
J.M. Maus
NTG Neue Technologien GmbH & Co KG, Gelnhausen, Germany

The detector system ROSE, allowing to perform 4D emittance measurements on heavy ion beams independent of their energy and time structure, has been built and successfully commissioned in 2016 at GSI in Darmstadt, Germany. This method to measure the four dimensional emittance has then been granted a patent in 2017. The inventors together with the technology transfer department of GSI have found an industrial partner to modify ROSE into a fully standalone, mobile emittance scanner system. This is a three step process involving the ROSE hardware, the electronics ROBOMAT and the software working packages. The electronics was commissioned at the ECR test bench of the Heidelberg ion therapy facility HIT in June 2019. Currently our main focus is on the development of the 4D software package ROSOFT. This contribution presents the actual status and introduces the multiple possibilities of this 4D emittance scanner.

Slides THAO03 [26.411 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-THAO03

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

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