IBIC2019 - List of Keywords (vacuum)

Paper	Title	Other Keywords	Page
MOAO02	Beam Instrumentation and Diagnostics for High Luminosity LHC	luminosity, detector, electron, experiment	1
	M. Krupa CERN, Geneva, Switzerland
	The High Luminosity LHC projects aims to increase the integrated luminosity of the LHC experiments by an order of magnitude. New and upgraded beam instrumentation is being developed to cope with much brighter beams and to provide the additional novel diagnostics required to assure safe and efficient operation under the new LHC configuration. This contribution discusses the various ongoing developments and reports on the results obtained with prototypes for transverse position, intra-bunch position, transverse size and profile, and beam halo monitoring.
	Slides MOAO02 [15.308 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOAO02
About •	paper received ※ 05 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPP007	Versatile Beamline Cryostat for the Cryogenic Current Comparator (CCC) for FAIR	cryogenics, resonance, operation, simulation	78
	D.M. Haider, F. Kurian, M. Schwickert, T. Sieber, T. Stöhlker, F. Ucar GSI, Darmstadt, Germany H. De Gersem, N. Marsic, W.F.O. Müller TEMF, TU Darmstadt, Darmstadt, Germany J. Golm FSU Jena, Jena, Germany J. Golm, T. Koettig CERN, Meyrin, Switzerland M. Schmelz, R. Stolz, V. Zakosarenko IPHT, Jena, Germany T. Stöhlker IOQ, Jena, Germany T. Stöhlker, V. Tympel HIJ, Jena, Germany V. Zakosarenko Supracon AG, Jena, Germany
	Funding: Work supported by AVA - Accelerators Validating Antimatter the EU H₂020 Marie-Curie Action No. 721559 and by the BMBF under contract No. 05P15SJRBA and 5P18SJRB1. The Cryogenic Current Comparator (CCC) extends the measurement range of traditional non-destructive current monitors used in accelerator beamlines down to a few nano-amperes of direct beam current. This is achieved by a cryogenic environment of liquid helium around the beamline, in which the beam’s magnetic field is measured with a Superconducting Quantum Interference Device (SQUID), which is itself enclosed in a superconducting shielding structure. For this purpose, a versatile UHV-beamline cryostat was designed for the CCCs at FAIR and is currently in production. It is built for long-term autonomous operation with a closed helium re-liquefaction cycle and with good access to all inner components. The design is supported by simulations of the cryostat’s mechanical eigenmodes to minimize the excitation by vibrations in an accelerator environment. A prototype at GSI has demonstrated the self-contained cryogenic operation in combination with a 15 l/day re-liquefier. The cryostat will be used in CRYRING to compare the FAIR-CCC-X with newly developed CCC-types for 150 mm beamlines. Both which will supply a nA current reading during commissioning and for the experiments.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP007
About •	paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPP047	Design and Development of Beam Diagnostics for an FFA-FFA Ring for ISIS-II Upgrade Studies	simulation, detector, GUI, proton	214
	E. Yamakawa JAI, Oxford, United Kingdom S. Machida, A. Pertica, C.C. Wilcox STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
	The ISIS-II project aims to deliver a new spallation neu- tron source by 2034, driven by a 1.2 GeV proton accelerator capable of delivering a beam power of 1.25 MW with a rep- etition rate of 50 Hz or higher. One of the options for this future accelerator is a Fixed Field alternating gradient Accelerator (FFA). To demonstrate the suitability of FFAs for use in a user facility such as ISIS, there is a plan to construct a smaller scale proof of concept machine: FETS-FFA. Developing beam diagnostics for the FETS-FFA ring presents a challenge due to a large orbit excursion and aperture ( 60 mm x 700 mm). Diagnostics must cover the full size of beam chamber whilst still providing measurement sensitivity and resolution comparable to that seen in the ISIS synchrotron. This paper presents the current design and development of beam diagnostics for the FETS-FFA ring, including finite element studies of Beam Position Monitors (BPMs) and Ionisation Profile Monitors (IPMs).
	Poster MOPP047 [9.355 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP047
About •	paper received ※ 03 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUBO04	Measuring the Beam Profile by Counting Ionization Electrons	electron, detector, simulation, proton	257
	H.S. Sandberg, W. Bertsche UMAN, Manchester, United Kingdom D. Bodart, B. Dehning, S. Levasseur, H.S. Sandberg, G. Schneider, J.W. Storey, R. Veness CERN, Geneva, Switzerland S.M. Gibson Royal Holloway, University of London, Surrey, United Kingdom K. Satou J-PARC, KEK & JAEA, Ibaraki-ken, Japan
	The principle of non-destructive beam profile measurement with rest gas ionization electrons has remained largely unchanged since the technique was first proposed in the late 1960¿s. Ionization electrons (or ions) are transported by an electrostatic field onto an imaging detector, where the spatial distribution of detected electrons is a direct measure of the transverse beam profile. The detector typically consists of one or more Micro-Channel Plates (MCP’s) to amplify the signal, followed by either a phosphor screen and camera, or pickup electrodes. A long-standing problem is the ageing of the MCP’s, which limits the accuracy of the beam profile measurement. A new technique to detect ionization electrons has been developed at CERN, which uses a hybrid pixel detector to detect single ionisation electrons. This allows the application of counting statistics to the beam profile measurement. It will be shown that a meaningful beam profile can be extracted from only 100 electrons. Results from the new instrument will be presented, which demonstrate the ability to measure the beam profile of single bunches turn-by-turn, which offers new opportunities for beam diagnostic insights.
	Slides TUBO04 [2.199 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUBO04
About •	paper received ※ 03 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPP005	PLC Based Flexible and Scalable Vacuum Control at the Argonne Tandem Linear Accelerator System (ATLAS)	controls, PLC, ECR, status	285
	Y. Luo, D.G. Bilbrough, C. Dickerson, A.E. Germain, M.R. Hendricks, C.E. Peters, S.I. Sharamentov ANL, Lemont, Illinois, USA
	Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357. This research used resources of ANL¿s ATLAS facility, a DOE Office. The beamline sections of an accelerator and different ion sources require a vacuum system capable of providing pressures down to 10^-10 Torr. To control, monitor, and provide interlock protection of the vacuum equipment, a PLC-based vacuum control system was developed and tested at the Argonne Tandem Linear Accelerator (ATLAS). This system was designed to be highly flexible and scalable to meet the variety of equipment and configurations at ATLAS. The current FGPA-based system is reliable and fast, but is very difficult to maintain and upgrade. Particular attention was paid to the signal distribution to promote standard cable connections, minimize the usage of terminal blocks, and reduce the time to troubleshoot problematic channels. The system monitors the status of fast acting relays for interlock or control purposes, and utilizes RS-485 communication to gather lower priority information such as pump speeds or vacuum pressure readouts. The vacuum levels are monitored to interlock the high voltages of some beam instruments to protect against sparks as the Paschen minimum is approached. This paper mainly presents work on hardware interface to various vacuum devices.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP005
About •	paper received ※ 30 August 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPP014	New Combined Function Wire Scanner-Screen Station for the High Resolution Transverse Profile Measurements at FERMI	electron, FEL, operation, laser	322
	M. Veronese, A. Abrami, M. Bossi, M. Ferianis, S. Grulja, G. Penco, M. Tudor Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	We present the upgrade of the transverse profile diagnostics at the end of the FERMI Linac with a new high resolution instrumentation with the aim of improving the accuracy of the measurement of the twiss parameters and of the emittance. A scintillating screen, has been adopted instead of OTR screen due to known COTR issues. We used the same COTR suppression geometry that we had already implemented on our intra undulator screens and YAG:Ce as scintillating material. Screen based transverse profile diagnostics provide single shot measurements with a typical resolution of the order of tens of microns mainly due to refraction effects, geometry and other physical material properties. To extend the resolution to the micron level needed in case of low charge operation, we have equipped the same vacuum chamber with a wire scanner housing 10 micron tungsten wires. This paper describes the design and the first operational experience with the new device and discusses advantages as well as limitations.
	Poster TUPP014 [0.638 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP014
About •	paper received ※ 04 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPP024	Development of a Beam Induced Fluorescence Monitor for Non-Destructively Profiling MW Proton Beam at the J-PARC Neutrino Beamline	injection, photon, proton, simulation	358
	S.V. Cao, M.L. Friend, K. Sakashita KEK, Tsukuba, Japan M. Hartz Kavli IPMU, Kashiwa, Japan A. Nakamura Okayama University, Okayama, Japan
	A Beam Induced Fluorescence (BIF) monitor is under development for non-destructively monitoring the future MW-power proton beam at the neutrino extraction beamline at J-PARC. The §I{30}{GeV} protons are bombarded onto a graphite target, producing one of the most intense neutrino beams in the world for the Tokai-to-Kamioka (T2K) long-baseline neutrino oscillation experiment, where beam profile monitoring is essential for protecting beamline equipment and understanding the neutrino flux. For the BIF monitor, gas is injected into the beam pipe and the spatial distribution of the fluorescence light induced by proton-gas interactions is measured, allowing us to continuously and non-destructively monitor the proton beam profile. However, the specifications of the beamline require us to carefully control the gas localization by pulsed injection. Radiation hardness of all monitor components and profile distortion caused by space charge effects must also be considered. We will show how to address these challenges and realize a working prototype.
	Poster TUPP024 [8.094 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP024
About •	paper received ※ 04 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPP028	Double-Wire Vibrating Wire Monitor (DW-VWM) for Beam Halo Monitoring in High-intensity Accelerators	experiment, laser, electron, operation	373
	D.H. Kwak, M. Chung UNIST, Ulsan, Republic of Korea S.G. Arutunian, A.V. Margaryan ANSL, Yerevan, Armenia G.S. Harutyunyan, E.G. Lazareva YSU, Yerevan, Armenia
	Funding: This work was partly supported by the National Research Foundation of Korea (Grants No. 2017M1A7A1A02016413). Double-Wire Vibrating Wire Monitor (DW-VWM) has been designed and manufactured to monitor the beam halo in high-intensity accelerators. Compared with the previous VWM, we increase the ratio between the aperture and wire length by using strong 5 mm x 5 mm Samarium-Cobalt magnets. In addition, we install two stainless steel vibrating wires on the same frame. The first wire is placed in the beam halo region for measurements, and the second wire, which is separated from the beam by a screen, is used to subtract background signal caused by ambient temperature shifts. The new electronics of the DW-VWM consist of two main boards: auto-generation unit which is placed near the VWM, and the frequency measurement unit which is placed in the control room (100 m distance operation was tested). Typical frequency of the VWM (at start tension about 0.7 of tensile strength) is about 8000 Hz. The temperature sensitivity is about 110 Hz/K with 0.2 mK Hz resolution. The VWM was tested in vacuum tank and the frequency corresponding to each vacuum level was analyzed. The process of oscillation excitation at different levels of vacuum was also investigated.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP028
About •	paper received ※ 04 September 2019 paper accepted ※ 11 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPP033	Laboratory and Beam Based Studies for Assessing the Performance of the New Fast Wire Scanners for the CERN Injector Complex	controls, feedback, laser, operation	392
	J. Emery, P. Andersson, W. Andreazza, J.M. Fernandez Ochoa, A. Goldblatt, D. Gudkov, F. Roncarolo, J.L. Sirvent, J. Tassan-Viol, R. Veness CERN, Geneva, Switzerland
	At CERN, fast beam wire scanners serve as reference transverse profile monitors in all synchrotrons. As part of the LHC Injector Upgrade project, a new generation of scanners has been designed to improve system reliability, precision and accuracy in view of higher brightness beams. This paper will discuss the performance achieved during both laboratory calibration and prototype testing with beam. The beam measurements performed in 2018 demonstrated excellent system reliability and reproducibility, while calibration in the laboratory showed that an accuracy below 10 um can be achieved on the wire position determination.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP033
About •	paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPP035	Development of Modular Spare Parts for the Profile and Position Monitors of the 590 MeV Beam Line at HIPA	shielding, pick-up, simulation, target	402
	R. Dölling, D.C. Kiselev, F. Marcellini, K.M. Zehnder PSI, Villigen PSI, Switzerland D. Berisha, J. Germanovic, K.M. Zehnder ABBTS, Baden, Switzerland
	A new generation of monitor plugs is under development for the ageing wire profile monitors and beam position monitors which are inserted into massive shielding of the 590 MeV proton beam line at HIPA. The modular mechanical design, aspects of handling, vacuum compatibility, radiation hardness, shielding, cabling and monitor environment are discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP035
About •	paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP003	A new button-type beam position monitor for BESSY II and BESSY VSR	impedance, operation, storage-ring, resonance	508
	J.G. Hwang, V. Dürr, F. Falkenstern, M. Ries, A. Schälicke, G. Schiwietz, D. Wolk HZB, Berlin, Germany
	Funding: This work was supported by the German Bundesministerium für Bildung und Forschung, Land Berlin and grants of Helmholtz Association. The future BESSY VSR system involves more than one order-of-magnitude differences in the total charge of adjacent short and long bunches within the bunch train. Thus, any signal ringing beyond a nanosecond in time will cause a misreading of beam position and current, specifically for low bunch charges. This calls for improved performance for the bunch-selective operation of the beam-position-monitor (BPM) system. We report on the corresponding design and fabrication of a new button BPM with advanced features, such as impedance matching inside the button as well as optimization of insulator material, button size, and position, for reduced crosstalk between buttons.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP003
About •	paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP007	Calibration for Beam Energy Position Monitor System for Riken Superconducting Acceleration Cavity	network, linac, impedance, quadrupole	526
	T. Watanabe, M. Fujimaki, N. Fukunishi, H. Imao, O. Kamigaito, N. Sakamoto, Y. Watanabe, K. Yamada RIKEN Nishina Center, Wako, Japan K. Hanamura, T. Kawachi Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan A. Kamoshida National Instruments Japan Corporation, MInato-ku, Tokyo, Japan R. Koyama SHI Accelerator Service Ltd., Tokyo, Japan A. Miura JAEA/J-PARC, Tokai-mura, Japan T. Miyao, T. Toyama KEK, Ibaraki, Japan
	Upgrades for the RIKEN Heavy-ion Linac (RILAC) involving a new Superconducting Linac (SRILAC) are currently underway to promote super-heavy element searches and Radio Isotope (RI) production (211At) for medical use at the RIKEN radioactive isotope beam factory (RIBF). If destructive monitors are used, since they generate outgassing, it becomes difficult to maintain the Q value and surface resistance indicating the performance of the superconducting radio frequency (SRF) cavities over a long period of time. Therefore it is crucially important to develop nondestructive beam measurement diagnostics. We have developed a beam energy position monitor (BEPM) system which can measure not only the beam position but also the beam energy simultaneously by measuring the time of flight of the beam. By using parabolic cut, ideal linear response of the quadrupole moments is realized, keeping a good linear position sensitivity at the same time. We fabricated 11 BEPMs and the position calibration system employing a wire method has been used to obtain the sensitivity and offset of BEPMs. We will describe details concerning the BEPM, calibration system and measured results.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP007
About •	paper received ※ 05 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP014	A Report on Developments of the BCM and BPM Pickups of the ESS MEBT	MEBT, pick-up, quadrupole, impedance	539
	S. Varnasseri, I. Bustinduy, A. Conde, J. Martin, A. Ortega, I. Rueda, A.Z. Zugazaga ESS Bilbao, Zamudio, Spain R.A. Baron, H. Hassanzadegan, T.J. Shea ESS, Lund, Sweden
	In the framework of the Spanish In-Kind Contribution (IKC) to the construction of the European Spallation Source (ESS-ERIC), ESS-Bilbao is in charge of providing some key systems for the accelerator. In this paper, design and pre-delivery measurements of non-interceptive devices of MEBT (e.g Beam Position Monitor pick-ups, shielded ACCT and FCT) are reported. Overall there are 8 BPMs distributed in MEBT, which 7 of them are used for the beam position and phase measurements and one BPM is used for the fast timing characterization. The latter is used mainly to characterize the partially chopped bunches and rise/fall time of the Beam Chopper. Furthermore there are two ACCTs, one just attached to the beam dump and the other at the last raft of the MEBT. One FCT combined with the second ACCT gives the complementary information on the fast timing characteristics of the beam pulses.
	Poster WEPP014 [1.291 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP014
About •	paper received ※ 02 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP025	A Transverse Deflecting Cavity Prototype for the MAX IV LINAC	linac, simulation, polarization, gun	575
	D. Olsson, A. Bjermo, L. Christiansson, J. Lundh, D. Lundström, E. Mansten, M. Nilsson, E. Paju, L.K. Roslund, K. Åhnberg MAX IV Laboratory, Lund University, Lund, Sweden
	The MAX IV LINAC operates both as a full-energy injector for two electron storage rings, and as a driver for a Short Pulse Facility (SPF). There are also plans to build Soft X-ray Laser (SXL) beamlines at the end of the existing LINAC. For SPF and SXL operation, it is important to characterize beam parameters such as bunch profile, slice energy spread and slice emittance. For these measurements, two 3 m long transverse deflecting RF structures are being developed. The structures are operating at S-band, and it is possible to adjust the polarization of the deflecting fields. In order to verify the RF concept, a short 9-cell prototype was constructed. The measurements results of the prototype are presented in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP025
About •	paper received ※ 03 September 2019 paper accepted ※ 09 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP036	Application of Thermoelectric Oscillations in a Lithium Niobate Single Crystal for Particle Generation	electron, experiment, ECR, target	620
	K.V. Fedorov, P. Karataev JAI, Egham, Surrey, United Kingdom K.V. Fedorov TPU, Tomsk, Russia O.O. Ivashchuk, A.A. Klenin, A.S. Kubankin, A.N. Oleinik BelSU, Belgorod, Russia A.V. Shchagin NSC/KIPT, Kharkov, Ukraine
	Single crystals of lithium niobate (LiNbO3) and lithium tantalate (LiTaO3) can be used to accelerate electrons and positive ions to energies of the order of 100 keV and generate X-rays and fast neutrons, as well as to control beams of charged particles. However, this way of particles acceleration and generation is not widely used yet due to an unstable particle flux caused by electric breakdowns or crystal impurities leading to temporal discontinuity of pyroelectric current. A sinusoidal mode of the temperature change demonstrated stable oscillations of the pyroelectric current on the polar surface with typical frequency being of the order of 1-50 mHz and the amplitude being about 1-10 nA for samples with area of several cm². In vacuum it leads to generation of high electric field, which oscillates with the same frequency. Estimated amplitude of electric field is order of 105 V/cm. The possibilities of using such mode of temperature change to obtain a quasi-stable X-ray and electron source are considered. The fundamental properties and further prospects for the application of thermoelectric oscillations are also discussed.
	Poster WEPP036 [1.256 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP036
About •	paper received ※ 03 September 2019 paper accepted ※ 11 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOAO02

Beam Instrumentation and Diagnostics for High Luminosity LHC

luminosity, detector, electron, experiment

1

M. Krupa
CERN, Geneva, Switzerland

The High Luminosity LHC projects aims to increase the integrated luminosity of the LHC experiments by an order of magnitude. New and upgraded beam instrumentation is being developed to cope with much brighter beams and to provide the additional novel diagnostics required to assure safe and efficient operation under the new LHC configuration. This contribution discusses the various ongoing developments and reports on the results obtained with prototypes for transverse position, intra-bunch position, transverse size and profile, and beam halo monitoring.

Slides MOAO02 [15.308 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOAO02

About •

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

Export •

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

MOPP007

Versatile Beamline Cryostat for the Cryogenic Current Comparator (CCC) for FAIR

cryogenics, resonance, operation, simulation

78

D.M. Haider, F. Kurian, M. Schwickert, T. Sieber, T. Stöhlker, F. Ucar
GSI, Darmstadt, Germany
H. De Gersem, N. Marsic, W.F.O. Müller
TEMF, TU Darmstadt, Darmstadt, Germany
J. Golm
FSU Jena, Jena, Germany
J. Golm, T. Koettig
CERN, Meyrin, Switzerland
M. Schmelz, R. Stolz, V. Zakosarenko
IPHT, Jena, Germany
T. Stöhlker
IOQ, Jena, Germany
T. Stöhlker, V. Tympel
HIJ, Jena, Germany
V. Zakosarenko
Supracon AG, Jena, Germany

Funding: Work supported by AVA - Accelerators Validating Antimatter the EU H₂020 Marie-Curie Action No. 721559 and by the BMBF under contract No. 05P15SJRBA and 5P18SJRB1.
The Cryogenic Current Comparator (CCC) extends the measurement range of traditional non-destructive current monitors used in accelerator beamlines down to a few nano-amperes of direct beam current. This is achieved by a cryogenic environment of liquid helium around the beamline, in which the beam’s magnetic field is measured with a Superconducting Quantum Interference Device (SQUID), which is itself enclosed in a superconducting shielding structure. For this purpose, a versatile UHV-beamline cryostat was designed for the CCCs at FAIR and is currently in production. It is built for long-term autonomous operation with a closed helium re-liquefaction cycle and with good access to all inner components. The design is supported by simulations of the cryostat’s mechanical eigenmodes to minimize the excitation by vibrations in an accelerator environment. A prototype at GSI has demonstrated the self-contained cryogenic operation in combination with a 15 l/day re-liquefier. The cryostat will be used in CRYRING to compare the FAIR-CCC-X with newly developed CCC-types for 150 mm beamlines. Both which will supply a nA current reading during commissioning and for the experiments.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP007

About •

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

Export •

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

MOPP047

Design and Development of Beam Diagnostics for an FFA-FFA Ring for ISIS-II Upgrade Studies

simulation, detector, GUI, proton

214

E. Yamakawa
JAI, Oxford, United Kingdom
S. Machida, A. Pertica, C.C. Wilcox
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom

The ISIS-II project aims to deliver a new spallation neu- tron source by 2034, driven by a 1.2 GeV proton accelerator capable of delivering a beam power of 1.25 MW with a rep- etition rate of 50 Hz or higher. One of the options for this future accelerator is a Fixed Field alternating gradient Accelerator (FFA). To demonstrate the suitability of FFAs for use in a user facility such as ISIS, there is a plan to construct a smaller scale proof of concept machine: FETS-FFA. Developing beam diagnostics for the FETS-FFA ring presents a challenge due to a large orbit excursion and aperture ( 60 mm x 700 mm). Diagnostics must cover the full size of beam chamber whilst still providing measurement sensitivity and resolution comparable to that seen in the ISIS synchrotron. This paper presents the current design and development of beam diagnostics for the FETS-FFA ring, including finite element studies of Beam Position Monitors (BPMs) and Ionisation Profile Monitors (IPMs).

Poster MOPP047 [9.355 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP047

About •

paper received ※ 03 September 2019 paper accepted ※ 07 September 2019 issue date ※ 10 November 2019

Export •

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

TUBO04

Measuring the Beam Profile by Counting Ionization Electrons

electron, detector, simulation, proton

257

H.S. Sandberg, W. Bertsche
UMAN, Manchester, United Kingdom
D. Bodart, B. Dehning, S. Levasseur, H.S. Sandberg, G. Schneider, J.W. Storey, R. Veness
CERN, Geneva, Switzerland
S.M. Gibson
Royal Holloway, University of London, Surrey, United Kingdom
K. Satou
J-PARC, KEK & JAEA, Ibaraki-ken, Japan

The principle of non-destructive beam profile measurement with rest gas ionization electrons has remained largely unchanged since the technique was first proposed in the late 1960¿s. Ionization electrons (or ions) are transported by an electrostatic field onto an imaging detector, where the spatial distribution of detected electrons is a direct measure of the transverse beam profile. The detector typically consists of one or more Micro-Channel Plates (MCP’s) to amplify the signal, followed by either a phosphor screen and camera, or pickup electrodes. A long-standing problem is the ageing of the MCP’s, which limits the accuracy of the beam profile measurement. A new technique to detect ionization electrons has been developed at CERN, which uses a hybrid pixel detector to detect single ionisation electrons. This allows the application of counting statistics to the beam profile measurement. It will be shown that a meaningful beam profile can be extracted from only 100 electrons. Results from the new instrument will be presented, which demonstrate the ability to measure the beam profile of single bunches turn-by-turn, which offers new opportunities for beam diagnostic insights.

Slides TUBO04 [2.199 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUBO04

About •

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

Export •

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

TUPP005

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

controls, PLC, ECR, status

285

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

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

DOI •

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

About •

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

Export •

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

TUPP014

New Combined Function Wire Scanner-Screen Station for the High Resolution Transverse Profile Measurements at FERMI

electron, FEL, operation, laser

322

M. Veronese, A. Abrami, M. Bossi, M. Ferianis, S. Grulja, G. Penco, M. Tudor
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

We present the upgrade of the transverse profile diagnostics at the end of the FERMI Linac with a new high resolution instrumentation with the aim of improving the accuracy of the measurement of the twiss parameters and of the emittance. A scintillating screen, has been adopted instead of OTR screen due to known COTR issues. We used the same COTR suppression geometry that we had already implemented on our intra undulator screens and YAG:Ce as scintillating material. Screen based transverse profile diagnostics provide single shot measurements with a typical resolution of the order of tens of microns mainly due to refraction effects, geometry and other physical material properties. To extend the resolution to the micron level needed in case of low charge operation, we have equipped the same vacuum chamber with a wire scanner housing 10 micron tungsten wires. This paper describes the design and the first operational experience with the new device and discusses advantages as well as limitations.

Poster TUPP014 [0.638 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP014

About •

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

Export •

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

TUPP024

Development of a Beam Induced Fluorescence Monitor for Non-Destructively Profiling MW Proton Beam at the J-PARC Neutrino Beamline

injection, photon, proton, simulation

358

S.V. Cao, M.L. Friend, K. Sakashita
KEK, Tsukuba, Japan
M. Hartz
Kavli IPMU, Kashiwa, Japan
A. Nakamura
Okayama University, Okayama, Japan

A Beam Induced Fluorescence (BIF) monitor is under development for non-destructively monitoring the future MW-power proton beam at the neutrino extraction beamline at J-PARC. The §I{30}{GeV} protons are bombarded onto a graphite target, producing one of the most intense neutrino beams in the world for the Tokai-to-Kamioka (T2K) long-baseline neutrino oscillation experiment, where beam profile monitoring is essential for protecting beamline equipment and understanding the neutrino flux. For the BIF monitor, gas is injected into the beam pipe and the spatial distribution of the fluorescence light induced by proton-gas interactions is measured, allowing us to continuously and non-destructively monitor the proton beam profile. However, the specifications of the beamline require us to carefully control the gas localization by pulsed injection. Radiation hardness of all monitor components and profile distortion caused by space charge effects must also be considered. We will show how to address these challenges and realize a working prototype.

Poster TUPP024 [8.094 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP024

About •

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

Export •

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

TUPP028

Double-Wire Vibrating Wire Monitor (DW-VWM) for Beam Halo Monitoring in High-intensity Accelerators

experiment, laser, electron, operation

373

D.H. Kwak, M. Chung
UNIST, Ulsan, Republic of Korea
S.G. Arutunian, A.V. Margaryan
ANSL, Yerevan, Armenia
G.S. Harutyunyan, E.G. Lazareva
YSU, Yerevan, Armenia

Funding: This work was partly supported by the National Research Foundation of Korea (Grants No. 2017M1A7A1A02016413).
Double-Wire Vibrating Wire Monitor (DW-VWM) has been designed and manufactured to monitor the beam halo in high-intensity accelerators. Compared with the previous VWM, we increase the ratio between the aperture and wire length by using strong 5 mm x 5 mm Samarium-Cobalt magnets. In addition, we install two stainless steel vibrating wires on the same frame. The first wire is placed in the beam halo region for measurements, and the second wire, which is separated from the beam by a screen, is used to subtract background signal caused by ambient temperature shifts. The new electronics of the DW-VWM consist of two main boards: auto-generation unit which is placed near the VWM, and the frequency measurement unit which is placed in the control room (100 m distance operation was tested). Typical frequency of the VWM (at start tension about 0.7 of tensile strength) is about 8000 Hz. The temperature sensitivity is about 110 Hz/K with 0.2 mK Hz resolution. The VWM was tested in vacuum tank and the frequency corresponding to each vacuum level was analyzed. The process of oscillation excitation at different levels of vacuum was also investigated.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP028

About •

paper received ※ 04 September 2019 paper accepted ※ 11 September 2019 issue date ※ 10 November 2019

Export •

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

TUPP033

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

controls, feedback, laser, operation

392

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

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

DOI •

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

About •

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

Export •

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

TUPP035

Development of Modular Spare Parts for the Profile and Position Monitors of the 590 MeV Beam Line at HIPA

shielding, pick-up, simulation, target

402

R. Dölling, D.C. Kiselev, F. Marcellini, K.M. Zehnder
PSI, Villigen PSI, Switzerland
D. Berisha, J. Germanovic, K.M. Zehnder
ABBTS, Baden, Switzerland

A new generation of monitor plugs is under development for the ageing wire profile monitors and beam position monitors which are inserted into massive shielding of the 590 MeV proton beam line at HIPA. The modular mechanical design, aspects of handling, vacuum compatibility, radiation hardness, shielding, cabling and monitor environment are discussed.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP035

About •

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

Export •

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

WEPP003

A new button-type beam position monitor for BESSY II and BESSY VSR

impedance, operation, storage-ring, resonance

508

J.G. Hwang, V. Dürr, F. Falkenstern, M. Ries, A. Schälicke, G. Schiwietz, D. Wolk
HZB, Berlin, Germany

Funding: This work was supported by the German Bundesministerium für Bildung und Forschung, Land Berlin and grants of Helmholtz Association.
The future BESSY VSR system involves more than one order-of-magnitude differences in the total charge of adjacent short and long bunches within the bunch train. Thus, any signal ringing beyond a nanosecond in time will cause a misreading of beam position and current, specifically for low bunch charges. This calls for improved performance for the bunch-selective operation of the beam-position-monitor (BPM) system. We report on the corresponding design and fabrication of a new button BPM with advanced features, such as impedance matching inside the button as well as optimization of insulator material, button size, and position, for reduced crosstalk between buttons.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP003

About •

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

Export •

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

WEPP007

Calibration for Beam Energy Position Monitor System for Riken Superconducting Acceleration Cavity

network, linac, impedance, quadrupole

526

T. Watanabe, M. Fujimaki, N. Fukunishi, H. Imao, O. Kamigaito, N. Sakamoto, Y. Watanabe, K. Yamada
RIKEN Nishina Center, Wako, Japan
K. Hanamura, T. Kawachi
Mitsubishi Electric System & Service Co., Ltd, Tsukuba, Japan
A. Kamoshida
National Instruments Japan Corporation, MInato-ku, Tokyo, Japan
R. Koyama
SHI Accelerator Service Ltd., Tokyo, Japan
A. Miura
JAEA/J-PARC, Tokai-mura, Japan
T. Miyao, T. Toyama
KEK, Ibaraki, Japan

Upgrades for the RIKEN Heavy-ion Linac (RILAC) involving a new Superconducting Linac (SRILAC) are currently underway to promote super-heavy element searches and Radio Isotope (RI) production (211At) for medical use at the RIKEN radioactive isotope beam factory (RIBF). If destructive monitors are used, since they generate outgassing, it becomes difficult to maintain the Q value and surface resistance indicating the performance of the superconducting radio frequency (SRF) cavities over a long period of time. Therefore it is crucially important to develop nondestructive beam measurement diagnostics. We have developed a beam energy position monitor (BEPM) system which can measure not only the beam position but also the beam energy simultaneously by measuring the time of flight of the beam. By using parabolic cut, ideal linear response of the quadrupole moments is realized, keeping a good linear position sensitivity at the same time. We fabricated 11 BEPMs and the position calibration system employing a wire method has been used to obtain the sensitivity and offset of BEPMs. We will describe details concerning the BEPM, calibration system and measured results.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP007

About •

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

Export •

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

WEPP014

A Report on Developments of the BCM and BPM Pickups of the ESS MEBT

MEBT, pick-up, quadrupole, impedance

539

S. Varnasseri, I. Bustinduy, A. Conde, J. Martin, A. Ortega, I. Rueda, A.Z. Zugazaga
ESS Bilbao, Zamudio, Spain
R.A. Baron, H. Hassanzadegan, T.J. Shea
ESS, Lund, Sweden

In the framework of the Spanish In-Kind Contribution (IKC) to the construction of the European Spallation Source (ESS-ERIC), ESS-Bilbao is in charge of providing some key systems for the accelerator. In this paper, design and pre-delivery measurements of non-interceptive devices of MEBT (e.g Beam Position Monitor pick-ups, shielded ACCT and FCT) are reported. Overall there are 8 BPMs distributed in MEBT, which 7 of them are used for the beam position and phase measurements and one BPM is used for the fast timing characterization. The latter is used mainly to characterize the partially chopped bunches and rise/fall time of the Beam Chopper. Furthermore there are two ACCTs, one just attached to the beam dump and the other at the last raft of the MEBT. One FCT combined with the second ACCT gives the complementary information on the fast timing characteristics of the beam pulses.

Poster WEPP014 [1.291 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP014

About •

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

Export •

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

WEPP025

A Transverse Deflecting Cavity Prototype for the MAX IV LINAC

linac, simulation, polarization, gun

575

D. Olsson, A. Bjermo, L. Christiansson, J. Lundh, D. Lundström, E. Mansten, M. Nilsson, E. Paju, L.K. Roslund, K. Åhnberg
MAX IV Laboratory, Lund University, Lund, Sweden

The MAX IV LINAC operates both as a full-energy injector for two electron storage rings, and as a driver for a Short Pulse Facility (SPF). There are also plans to build Soft X-ray Laser (SXL) beamlines at the end of the existing LINAC. For SPF and SXL operation, it is important to characterize beam parameters such as bunch profile, slice energy spread and slice emittance. For these measurements, two 3 m long transverse deflecting RF structures are being developed. The structures are operating at S-band, and it is possible to adjust the polarization of the deflecting fields. In order to verify the RF concept, a short 9-cell prototype was constructed. The measurements results of the prototype are presented in this paper.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP025

About •

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

Export •

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

WEPP036

Application of Thermoelectric Oscillations in a Lithium Niobate Single Crystal for Particle Generation

electron, experiment, ECR, target

620

K.V. Fedorov, P. Karataev
JAI, Egham, Surrey, United Kingdom
K.V. Fedorov
TPU, Tomsk, Russia
O.O. Ivashchuk, A.A. Klenin, A.S. Kubankin, A.N. Oleinik
BelSU, Belgorod, Russia
A.V. Shchagin
NSC/KIPT, Kharkov, Ukraine

Single crystals of lithium niobate (LiNbO3) and lithium tantalate (LiTaO3) can be used to accelerate electrons and positive ions to energies of the order of 100 keV and generate X-rays and fast neutrons, as well as to control beams of charged particles. However, this way of particles acceleration and generation is not widely used yet due to an unstable particle flux caused by electric breakdowns or crystal impurities leading to temporal discontinuity of pyroelectric current. A sinusoidal mode of the temperature change demonstrated stable oscillations of the pyroelectric current on the polar surface with typical frequency being of the order of 1-50 mHz and the amplitude being about 1-10 nA for samples with area of several cm². In vacuum it leads to generation of high electric field, which oscillates with the same frequency. Estimated amplitude of electric field is order of 105 V/cm. The possibilities of using such mode of temperature change to obtain a quasi-stable X-ray and electron source are considered. The fundamental properties and further prospects for the application of thermoelectric oscillations are also discussed.

Poster WEPP036 [1.256 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP036

About •

paper received ※ 03 September 2019 paper accepted ※ 11 September 2019 issue date ※ 10 November 2019

Export •

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