IBIC2018 - List of Keywords (vacuum)

Paper	Title	Other Keywords	Page
MOPA14	Electron Spectrometer for a Low Charge Intermediate Energy LWFA Electron Beam Measurement	electron, dipole, experiment, laser	57
	A.V. Ottmar, Yu.I. Maltseva, T.V. Rybitskaya BINP SB RAS, Novosibirsk, Russia V. Gubin Institute of Laser Physics, SB RAS, Novosibirsk, Russia
	The Laser-driven Compton light source is under development in ILP SB RAS in collaboration with BINP SB RAS. Electron spectrometer for measurement of LWFA electron beam with energy in the range 10-150 MeV and bunch charge 1-10 pC is presented. Spectrometer based on permanent magnet and luminous screen with CCD registrar and this geometry was optimized for best measurements resolution in compromise with size limitations. Preliminary collimation of electron beam allows achieving energy resolution up to 5-10 % of top limit. System has been tested at the VEPP-5 linear electron accelerator and obtained results correspond to design objectives. Sensitivity of beam transverse charge density was experimentally fixed at 0.03 pC/mm², it is practically sufficient for our LWFA experiments.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOPA14
About •	paper received ※ 03 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

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

TUPA04	Analysis of Interlocked Events based on Beam Instrumentation Data at J-PARC Linac and RCS	linac, detector, operation, instrumentation	219
	N. Hayashi, S. Hatakeyama, A. Miura, M. Yoshimoto JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan K. Futatsukawa, T. Miyao KEK, Ibaraki, Japan
	J-PARC is a multi-purpose facility. Accelerator stability is the one of important issues for users of this facility. To realize stable operation, we must collect data on interlocked events and analyze these data to determine the reasons for the occurrence of such events. In J-PARC Linac, data of interlocked events have been recorded using several some beam loss monitors and current monitors, and these data have been are analyzed and classified. In J-PARC RCS, new instrumentation is being introduced to obtain beam position. We discuss the present status and future plans related to this subject.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPA04
About •	paper received ※ 07 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPA07	Collimator for Beam Position Measurement and Beam Collimation for Cyclotron	controls, target, cyclotron, collimation	224
	L.X. Hu, Y. Chen, K.Z. Ding, J. Li, Y. Song, Q. Yang ASIPP, Hefei, People’s Republic of China Y.C. Wu, K. Yao HFCIM, HeFei, People’s Republic of China
	Funding: This work is supported in part by grants 1604b0602005 and 1503062029. In order to restrict the beam dispersion and diffusion at the extraction area of the cyclotron and to detect abnormal beam loss, a beam collimator system has been designed to collimate the beam and to measure its transverse positions. The collimator system is composed of a vacuum cavity, two pairs of beam targets, a set of driving and supporting mechanism, and a measurement and control unit. The beam target with the size determined by the diameter of the beam pipe, the particle energy and beam intensity, will generate current signal during particle deposition. Each pair of beam targets has bilateral blocks which forms a slit in either horizontal or vertical direction. Servo motor and screw rod are used so that the target can reciprocate with the repeatability of less than 0.1mm. The measurement and control system based on LabVIEW can realize the motion control and current measurement of the targets and then calculate the beam transverse positions.
	Poster TUPA07 [1.603 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPA07
About •	paper received ※ 05 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPA15	Adaptive Collimator Design for Future Particle Accelerators	collimation, site, hadron, collider	240
	T.R. Furness, S. Fletcher, J.F. Williamson University of Huddersfield, Huddersfield, United Kingdom A. Bertarelli, F. Carra, L. Gentini, M. Pasquali, S. Redaelli CERN, Geneva, Switzerland
	Funding: This work has recevied funding from the Science & Technology Facilities Council (STFC) and, the European Organization for Nuclear Research (CERN) The function of collimators in the LHC is to control and safely dispose of the halo particles that are produced by unavoidable beam losses from the circulating beam. Even tiny proportions of the 7TeV beam have the stored energy to quench the superconducting magnets or damage parts of the accelerator if left unchecked. Particle absorbing Low-Z material make up the active area of the collimator (jaws). Various beam impact scenarios can induce significant temperature gradients that cause deformation of the jaws. This can lead to a reduction in beam cleaning efficiency which can have a detrimental effect on beam dynamics. This has led to research into a new Adaptive collimation system (ACS). The ACS is a re-design of a current collimator already in use at CERN. The ACS will incorporate a novel fibre based measurement system and piezoceramic actuators mounted within the body of the collimator to maintain jaw straightness below the 100µm specification. These two systems working in tandem can monitor, and correct for, the jaw structural deformation for all impact events. This paper details the concept and technical solutions of the ACS as well as preliminary validation calculations.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPA15
About •	paper received ※ 04 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPB04	Development of a New Button Beam-position Monitor for BESSY VSR	impedance, resonance, storage-ring, operation	265
	J.G. Hwang, V. Dürr, M. Ries, A. Schälicke, G. Schiwietz, D. Wolk HZB, Berlin, Germany
	An extreme operation mode such as the BESSY-VSR conditions stimulates the development of a high accuracy bunch-by-bunch beam-position monitor (BPM) system which is compatible with the bunch-selective operation for the orbit feedback system. Such a system will also greatly benefit to accelerator R&D such as transverse resonance island buckets (TRIBs). Compensation of the long-range ringing signal produced by the combined effect of impedance mismatching inside the button and trapped TE-modes in the aluminum-oxide insulator (Al2O3) material is required essentially to improve the resolution. This is important since the ringing causes a misreading of the beam position and current of following bunches. We show the design study of a new button-type BPM to mitigate the influence of the ringing signal as well as to reduce wake losses by improving the impedance matching in the button and by replacing the insulator material.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPB04
About •	paper received ※ 04 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPB14	New Beam Position Monitors for the CERN LINAC3 to LEIR Ion Beam Transfer Line	electron, linac, simulation, solenoid	293
	L. Søby, G. Baud, M. Bozzolan, R. Scrivens CERN, Geneva, Switzerland
	The injection line into the CERN Low Energy Ion Ring (LEIR) has recently been equipped with nine, new, electrostatic Beam Position Monitors (BPMs) in order to measure and optimize the trajectory of the low intensity ion beams coming from LINAC3. In this paper, we describe the design of the BPM, the low noise charge amplifier mounted directly on the BPM, and the digital acquisition system. There is special emphasis on the first commissioning results where the measured beam positions were seen to be perturbed by EMI and charging of the BPM electrodes by secondary particles. The effect of mitigation measures, including repelling voltages on the electrodes and external magnetic fields, are also discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPB14
About •	paper received ※ 03 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEOB01	New Beam Loss Detector System for EBS-ESRF	SRF, detector, injection, operation	346
	L. Torino, K.B. Scheidt ESRF, Grenoble, France
	In view of the construction and the commissioning of the new Extremely Brilliant Source (EBS) ring, a new Beam Loss Detector (BLDs) system has been developed, installed and tested in the present European Synchrotron Radiation Facility (ESRF) storage ring. The new BLD system is composed of 128 compact PMT-scintillator based BLDs, distributed evenly and symmetrically at 4 BLDs per cell, controlled and read out by 32 Libera Beam Loss Monitors (BLMs). The detectors fast response and the versatility of the read-out electronics allow to measure fast losses with an almost bunch-by-bunch resolution, as well as integrated losses useful during the machine operation. In this paper the different acquisition modes will be explained and results obtained during injection and normal operation will be presented.
	Slides WEOB01 [8.727 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEOB01
About •	paper received ※ 04 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

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

WEPB01	Photon Beam Imager at SOLEIL	undulator, radiation, operation, photon	425
	M. Labat, J. Da Silva, N. Hubert, F. Lepage SOLEIL, Gif-sur-Yvette, France
	In one of the long straight sections of SOLEIL is installed a pair of canted in-vacuum undulators for the ANATOMIX and NANOSCOPIUM beamlines. Since the upstream undulator radiation can potentially damage the downstream undulator magnets, an accurate survey of the respective alignment of the two devices is mandatory. An XBPM has been initially installed for this purpose in the beamline frontend. For redundancy and further analysis, an X-ray imager was then designed and added just downstream the XBPM. It is made of a diamond plate that can be inserted into the upstream beamline frontend at low current. Fluorescence of the Nitrogen impurities in the diamond is imaged on a CCD to check that the upstream radiation is not hitting the downstream insertion device. We present the commissioning of this new device together with its first results in operation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPB01
About •	paper received ※ 05 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPB13	Beam-Gas Imaging Measurements at LHCb	detector, luminosity, experiment, injection	459
	G.R. Coombs, M. Ferro-Luzzi, R. Matev CERN, Meyrin, Switzerland
	The LHCb detector is one of the four large particle physics experiments situated around the LHC ring. The excellent spatial resolution of the experiment’s vertex locator (VELO) and tracking system allows the accurate reconstruction of interactions between the LHC beam and either residual or injected gas molecules. These reconstructed beam-gas interactions gives LHCb the ability, unique among experiments, to measure the shape and the longitudinal distribution of the beams. Analysis methods were originally developed for the purpose of absolute luminosity calibration, achieving an unprecedented precision of 1.2% in Run I. They have since been extended and applied for online beam-profile monitoring that is continuously published to the LHC, for dedicated cross-calibration with other LHC beam profile monitors and for studies of the dynamic vacuum effects due to the proximity of the VELO subdetector to the beam. In this talk, we give an overview of the LHCb experience with beam-gas imaging techniques, we present recent results on the outlined topics and we summarise the developments that are being pursued for the ultimate understanding of the Run II measurements.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPB13
About •	paper received ※ 05 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPB16	Development of a Beam-Gas Curtain Profile Monitor for the High Luminosity Upgrade of the LHC	electron, proton, simulation, photon	472
	R. Veness, M. Ady, N. Chritin, J. Glutting, O.R. Jones, R. Kersevan, T. Marriott-Dodington, S. Mazzoni, A. Rossi, G. Schneider CERN, Meyrin, Switzerland P. Forck, S. Udrea GSI, Darmstadt, Germany A. Salehilashkajani The University of Liverpool, Liverpool, United Kingdom P. Smakulski WRUT, Wroclaw, Poland C.P. Welsch, H.D. Zhang Cockcroft Institute, Warrington, Cheshire, United Kingdom
	High luminosity upgrades to the LHC at CERN and future energy frontier machines will require a new generation of minimally invasive profile measurement instruments. Production of a dense, focussed gas target allows beam-gas fluorescence to be exploited as an observable, giving an instrument suitable for installation even in regions of high magnetic field. This paper describes the development of a device based on these principles that would be suitable for operation in the LHC. It focusses on mechanisms for the production of a homogeneous gas curtain, the selection of an appropriate working gas and the optical fluorescence detection system.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPB16
About •	paper received ※ 04 September 2018 paper accepted ※ 11 September 2018 issue date ※ 29 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPA14

Electron Spectrometer for a Low Charge Intermediate Energy LWFA Electron Beam Measurement

electron, dipole, experiment, laser

57

A.V. Ottmar, Yu.I. Maltseva, T.V. Rybitskaya
BINP SB RAS, Novosibirsk, Russia
V. Gubin
Institute of Laser Physics, SB RAS, Novosibirsk, Russia

The Laser-driven Compton light source is under development in ILP SB RAS in collaboration with BINP SB RAS. Electron spectrometer for measurement of LWFA electron beam with energy in the range 10-150 MeV and bunch charge 1-10 pC is presented. Spectrometer based on permanent magnet and luminous screen with CCD registrar and this geometry was optimized for best measurements resolution in compromise with size limitations. Preliminary collimation of electron beam allows achieving energy resolution up to 5-10 % of top limit. System has been tested at the VEPP-5 linear electron accelerator and obtained results correspond to design objectives. Sensitivity of beam transverse charge density was experimentally fixed at 0.03 pC/mm², it is practically sufficient for our LWFA experiments.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-MOPA14

About •

paper received ※ 03 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019

Export •

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

MOPC10

Upgrade and Improvement of CT Based on TMR

electron, electronics, simulation, power-supply

134

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

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

DOI •

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

About •

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

Export •

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

TUPA04

Analysis of Interlocked Events based on Beam Instrumentation Data at J-PARC Linac and RCS

linac, detector, operation, instrumentation

219

N. Hayashi, S. Hatakeyama, A. Miura, M. Yoshimoto
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
K. Futatsukawa, T. Miyao
KEK, Ibaraki, Japan

J-PARC is a multi-purpose facility. Accelerator stability is the one of important issues for users of this facility. To realize stable operation, we must collect data on interlocked events and analyze these data to determine the reasons for the occurrence of such events. In J-PARC Linac, data of interlocked events have been recorded using several some beam loss monitors and current monitors, and these data have been are analyzed and classified. In J-PARC RCS, new instrumentation is being introduced to obtain beam position. We discuss the present status and future plans related to this subject.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPA04

About •

paper received ※ 07 September 2018 paper accepted ※ 12 September 2018 issue date ※ 29 January 2019

Export •

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

TUPA07

Collimator for Beam Position Measurement and Beam Collimation for Cyclotron

controls, target, cyclotron, collimation

224

L.X. Hu, Y. Chen, K.Z. Ding, J. Li, Y. Song, Q. Yang
ASIPP, Hefei, People’s Republic of China
Y.C. Wu, K. Yao
HFCIM, HeFei, People’s Republic of China

Funding: This work is supported in part by grants 1604b0602005 and 1503062029.
In order to restrict the beam dispersion and diffusion at the extraction area of the cyclotron and to detect abnormal beam loss, a beam collimator system has been designed to collimate the beam and to measure its transverse positions. The collimator system is composed of a vacuum cavity, two pairs of beam targets, a set of driving and supporting mechanism, and a measurement and control unit. The beam target with the size determined by the diameter of the beam pipe, the particle energy and beam intensity, will generate current signal during particle deposition. Each pair of beam targets has bilateral blocks which forms a slit in either horizontal or vertical direction. Servo motor and screw rod are used so that the target can reciprocate with the repeatability of less than 0.1mm. The measurement and control system based on LabVIEW can realize the motion control and current measurement of the targets and then calculate the beam transverse positions.

Poster TUPA07 [1.603 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPA07

About •

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

Export •

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

TUPA15

Adaptive Collimator Design for Future Particle Accelerators

collimation, site, hadron, collider

240

T.R. Furness, S. Fletcher, J.F. Williamson
University of Huddersfield, Huddersfield, United Kingdom
A. Bertarelli, F. Carra, L. Gentini, M. Pasquali, S. Redaelli
CERN, Geneva, Switzerland

Funding: This work has recevied funding from the Science & Technology Facilities Council (STFC) and, the European Organization for Nuclear Research (CERN)
The function of collimators in the LHC is to control and safely dispose of the halo particles that are produced by unavoidable beam losses from the circulating beam. Even tiny proportions of the 7TeV beam have the stored energy to quench the superconducting magnets or damage parts of the accelerator if left unchecked. Particle absorbing Low-Z material make up the active area of the collimator (jaws). Various beam impact scenarios can induce significant temperature gradients that cause deformation of the jaws. This can lead to a reduction in beam cleaning efficiency which can have a detrimental effect on beam dynamics. This has led to research into a new Adaptive collimation system (ACS). The ACS is a re-design of a current collimator already in use at CERN. The ACS will incorporate a novel fibre based measurement system and piezoceramic actuators mounted within the body of the collimator to maintain jaw straightness below the 100µm specification. These two systems working in tandem can monitor, and correct for, the jaw structural deformation for all impact events. This paper details the concept and technical solutions of the ACS as well as preliminary validation calculations.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPA15

About •

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

Export •

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

TUPB04

Development of a New Button Beam-position Monitor for BESSY VSR

impedance, resonance, storage-ring, operation

265

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

An extreme operation mode such as the BESSY-VSR conditions stimulates the development of a high accuracy bunch-by-bunch beam-position monitor (BPM) system which is compatible with the bunch-selective operation for the orbit feedback system. Such a system will also greatly benefit to accelerator R&D such as transverse resonance island buckets (TRIBs). Compensation of the long-range ringing signal produced by the combined effect of impedance mismatching inside the button and trapped TE-modes in the aluminum-oxide insulator (Al2O3) material is required essentially to improve the resolution. This is important since the ringing causes a misreading of the beam position and current of following bunches. We show the design study of a new button-type BPM to mitigate the influence of the ringing signal as well as to reduce wake losses by improving the impedance matching in the button and by replacing the insulator material.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPB04

About •

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

Export •

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

TUPB14

New Beam Position Monitors for the CERN LINAC3 to LEIR Ion Beam Transfer Line

electron, linac, simulation, solenoid

293

L. Søby, G. Baud, M. Bozzolan, R. Scrivens
CERN, Geneva, Switzerland

The injection line into the CERN Low Energy Ion Ring (LEIR) has recently been equipped with nine, new, electrostatic Beam Position Monitors (BPMs) in order to measure and optimize the trajectory of the low intensity ion beams coming from LINAC3. In this paper, we describe the design of the BPM, the low noise charge amplifier mounted directly on the BPM, and the digital acquisition system. There is special emphasis on the first commissioning results where the measured beam positions were seen to be perturbed by EMI and charging of the BPM electrodes by secondary particles. The effect of mitigation measures, including repelling voltages on the electrodes and external magnetic fields, are also discussed.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-TUPB14

About •

paper received ※ 03 September 2018 paper accepted ※ 13 September 2018 issue date ※ 29 January 2019

Export •

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

WEOB01

New Beam Loss Detector System for EBS-ESRF

SRF, detector, injection, operation

346

L. Torino, K.B. Scheidt
ESRF, Grenoble, France

In view of the construction and the commissioning of the new Extremely Brilliant Source (EBS) ring, a new Beam Loss Detector (BLDs) system has been developed, installed and tested in the present European Synchrotron Radiation Facility (ESRF) storage ring. The new BLD system is composed of 128 compact PMT-scintillator based BLDs, distributed evenly and symmetrically at 4 BLDs per cell, controlled and read out by 32 Libera Beam Loss Monitors (BLMs). The detectors fast response and the versatility of the read-out electronics allow to measure fast losses with an almost bunch-by-bunch resolution, as well as integrated losses useful during the machine operation. In this paper the different acquisition modes will be explained and results obtained during injection and normal operation will be presented.

Slides WEOB01 [8.727 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEOB01

About •

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

Export •

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

WEOB02

RadFET Dose Monitor System for SOLEIL

radiation, electron, electronics, storage-ring

353

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

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

Slides WEOB02 [4.250 MB]

DOI •

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

About •

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

Export •

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

WEPB01

Photon Beam Imager at SOLEIL

undulator, radiation, operation, photon

425

M. Labat, J. Da Silva, N. Hubert, F. Lepage
SOLEIL, Gif-sur-Yvette, France

In one of the long straight sections of SOLEIL is installed a pair of canted in-vacuum undulators for the ANATOMIX and NANOSCOPIUM beamlines. Since the upstream undulator radiation can potentially damage the downstream undulator magnets, an accurate survey of the respective alignment of the two devices is mandatory. An XBPM has been initially installed for this purpose in the beamline frontend. For redundancy and further analysis, an X-ray imager was then designed and added just downstream the XBPM. It is made of a diamond plate that can be inserted into the upstream beamline frontend at low current. Fluorescence of the Nitrogen impurities in the diamond is imaged on a CCD to check that the upstream radiation is not hitting the downstream insertion device. We present the commissioning of this new device together with its first results in operation.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPB01

About •

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

Export •

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

WEPB13

Beam-Gas Imaging Measurements at LHCb

detector, luminosity, experiment, injection

459

G.R. Coombs, M. Ferro-Luzzi, R. Matev
CERN, Meyrin, Switzerland

The LHCb detector is one of the four large particle physics experiments situated around the LHC ring. The excellent spatial resolution of the experiment’s vertex locator (VELO) and tracking system allows the accurate reconstruction of interactions between the LHC beam and either residual or injected gas molecules. These reconstructed beam-gas interactions gives LHCb the ability, unique among experiments, to measure the shape and the longitudinal distribution of the beams. Analysis methods were originally developed for the purpose of absolute luminosity calibration, achieving an unprecedented precision of 1.2% in Run I. They have since been extended and applied for online beam-profile monitoring that is continuously published to the LHC, for dedicated cross-calibration with other LHC beam profile monitors and for studies of the dynamic vacuum effects due to the proximity of the VELO subdetector to the beam. In this talk, we give an overview of the LHCb experience with beam-gas imaging techniques, we present recent results on the outlined topics and we summarise the developments that are being pursued for the ultimate understanding of the Run II measurements.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPB13

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

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WEPB16

Development of a Beam-Gas Curtain Profile Monitor for the High Luminosity Upgrade of the LHC

electron, proton, simulation, photon

472

R. Veness, M. Ady, N. Chritin, J. Glutting, O.R. Jones, R. Kersevan, T. Marriott-Dodington, S. Mazzoni, A. Rossi, G. Schneider
CERN, Meyrin, Switzerland
P. Forck, S. Udrea
GSI, Darmstadt, Germany
A. Salehilashkajani
The University of Liverpool, Liverpool, United Kingdom
P. Smakulski
WRUT, Wroclaw, Poland
C.P. Welsch, H.D. Zhang
Cockcroft Institute, Warrington, Cheshire, United Kingdom

High luminosity upgrades to the LHC at CERN and future energy frontier machines will require a new generation of minimally invasive profile measurement instruments. Production of a dense, focussed gas target allows beam-gas fluorescence to be exploited as an observable, giving an instrument suitable for installation even in regions of high magnetic field. This paper describes the development of a device based on these principles that would be suitable for operation in the LHC. It focusses on mechanisms for the production of a homogeneous gas curtain, the selection of an appropriate working gas and the optical fluorescence detection system.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2018-WEPB16

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

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