IBIC2017 - List of Authors (Veness, R.)

Paper	Title	Page
WE2AB5	First Results From the Operation of a Rest Gas Ionisation Profile Monitor Based on a Hybrid Pixel Detector	318
	J.W. Storey, D. Bodart, B. Dehning, G. Schneider, R. Veness CERN, Geneva, Switzerland W. Bertsche, H. Sandberg UMAN, Manchester, United Kingdom S.M. Gibson, S. Levasseur Royal Holloway, University of London, Surrey, United Kingdom M. Sapinski GSI, Darmstadt, Germany K. Satou J-PARC, KEK & JAEA, Ibaraki-ken, Japan
	A novel rest gas ionisation profile monitor which aims to provide a continuous non-destructive bunch-by-bunch measurement of the transverse emittance is currently under development for the CERN Proton Synchrotron (CPS). Uniquely for this type of instrument the imaging detector that measures the position of the ionisation electrons consists of an array of pixelated silicon sensors which are read-out using Timepix3 readout chips. The pixel detector is directly sensitive to single ionisation electrons and therefore removes the need for electron amplification with Multi-Channel Plates which typically suffer from aging phenomena. The use of a pixel detector also offers the promise to significantly improve the time and spatial resolution of the position measurement compared to existing instruments. An ambitious program has been undertaken to develop a pixel detector that is compatible with operation directly inside the beam pipe vacuum together with the necessary radiation hard control and data acquisition electronics. A prototype version of the instrument was recently installed in the CPS and first results from the operation of this novel instrument will be presented.
	Slides WE2AB5 [38.592 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WE2AB5
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WE3AB1	The LHC Beam Gas Vertex Detector - a Non-Invasive Profile Monitor for High Energy Machines	323
	S. Vlachos, A. Alexopoulos, C. Barschel, E. Bravin, G. Bregliozzi, N. Chritin, B. Dehning, M. Ferro-Luzzi, M. Giovannozzi, R. Jacobsson, L.K. Jensen, R.J. Jones, V. Kain, R. Matev, M.N. Rihl, V. Salustino Guimaraes, R. Veness, B. Würkner CERN, Geneva, Switzerland A. Bay, F. Blanc, S. Gianì, O. Girard, G.J. Haefeli, P. Hopchev, A. Kuonen, T. Nakada, O. Schneider, M. Tobin, Q.D. Veyrat, Z. Xu EPFL, Lausanne, Switzerland R. Greim, W. Karpinski, S. Schael, A. Schultz von Dratzig, G. Schwering, M. Wlochal RWTH, Aachen, Germany
	The Beam Gas Vertex (BGV) monitor is being developed as part of the High Luminosity LHC project with the aim of providing measurements with less than 5% error on the beam size with an integration time of 5 minutes. It will be the only instrument capable of non-invasive beam size measurement throughout the LHC acceleration cycle with high intensity physics beams. A prototype BGV monitor has been installed in the LHC since 2016. Particles emerging from beam-gas interactions are recorded by 2 planes of scintillating fibre detectors. Based on vertex reconstruction of the detected tracks, this monitor allows non-invasive measurement of beam profiles with bunch-by-bunch resolution. A dedicated computer farm performs track reconstruction and event analysis on-line so that real-time beam profile measurements can be provided. Data taken in 2016 and 2017 will be presented that demonstrate the power of the method.
	Slides WE3AB1 [2.276 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WE3AB1
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WEPCC03	Performance Assessment of Pre-Series Fast Beam Wire Scanner Prototypes for the Upgrade of the CERN LHC Injector Complex	338
	J.L. Sirvent, P. Andersson, W. Andreazza, B. Dehning, J. Emery, L. Garcia, D. Gudkov, F. Roncarolo, J. Tassan-Viol, G. Trad, R. Veness CERN, Geneva, Switzerland
	A new generation of beam wire scanner (BWS), for transversal beam profile monitoring, is under development on the framework of the LHC Injector Upgrade project at CERN. Two pre-series prototypes have been built and installed in the Super Proton Synchrotron and Proton Synchrotron Booster, to assess the performance of the upgraded BWS concept. This contribution shows the outcome of the measurement campaigns carried out on the first BWS prototypes, both in the laboratory and with proton beams. An evaluation of a high dynamic range acquisition system for the measurement of the secondary showers produced by the beam-wire interaction is also presented.
	Poster WEPCC03 [2.080 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WEPCC03
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WEPCC08	Development of a Fluorescence Based Gas Sheet Profile Monitor for Use With Electron Lenses: Optical System Design and Preparatory Experiments	359
	S. Udrea, P. Forck GSI, Darmstadt, Germany E. Barrios Diaz, N. Chritin, O.R. Jones, P. Magagnin, G. Schneider, R. Veness CERN, Geneva, Switzerland V. Tzoganis, C.P. Welsch, H.D. Zhang Cockcroft Institute, Warrington, Cheshire, United Kingdom
	A hollow electron lens is presently under study as a possible addition to the collimation system for the high luminosity upgrade of the LHC (HL-LHC), while an electron lens system is also proposed for space charge compensation in the SIS-18 synchrotron for the high intensities at the future FAIR facility. For effective operation, a precise alignment is necessary between the high energy hadron beam and the low energy electron beam. In order to achieve this, a beam diagnostics setup based on an intersecting gas sheet and the observation of beam-induced fluorescence is under development. In this contribution we give an account of the design and performance of the optical detection system and report on recent preparatory experiments performed using a laboratory gas curtain Setup.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WEPCC08
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WEPWC02	Construction of a Mobile Irradiation Instrument for the Verification of the CERN LHC Beam Loss Monitoring System	450
	D. Gudkov, V. Grishin, R. Veness, C. Zamantzas CERN, Geneva, Switzerland
	The strategy for machine protection and quench prevention of the super-conducting elements of the Large Hadron Collider (LHC) at the European Organisation for Nuclear Research (CERN) is heavily reliant on its beam loss monitoring system. This is one of the most complex and large-scale beam instrumentation systems deployed anywhere in the world. In order to augment the system's dependability and verify the correct connection of each of the approximately 4000 detectors distributed around the 27 km LHC ring to its assigned channel in the electronic system, a mobile irradiation instrument has been designed and built. This instrument can be easily and safely transported along the LHC tunnel and imitate a localised beam loss at each BLM detector. This paper describes the concept of the instrument, its engineering design, the safety measures included and recent upgrades. Possible future improvements of the device are also considered.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WEPWC02
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

First Results From the Operation of a Rest Gas Ionisation Profile Monitor Based on a Hybrid Pixel Detector

318

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

A novel rest gas ionisation profile monitor which aims to provide a continuous non-destructive bunch-by-bunch measurement of the transverse emittance is currently under development for the CERN Proton Synchrotron (CPS). Uniquely for this type of instrument the imaging detector that measures the position of the ionisation electrons consists of an array of pixelated silicon sensors which are read-out using Timepix3 readout chips. The pixel detector is directly sensitive to single ionisation electrons and therefore removes the need for electron amplification with Multi-Channel Plates which typically suffer from aging phenomena. The use of a pixel detector also offers the promise to significantly improve the time and spatial resolution of the position measurement compared to existing instruments. An ambitious program has been undertaken to develop a pixel detector that is compatible with operation directly inside the beam pipe vacuum together with the necessary radiation hard control and data acquisition electronics. A prototype version of the instrument was recently installed in the CPS and first results from the operation of this novel instrument will be presented.

Slides WE2AB5 [38.592 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WE2AB5

Export •

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

WE3AB1

The LHC Beam Gas Vertex Detector - a Non-Invasive Profile Monitor for High Energy Machines

323

S. Vlachos, A. Alexopoulos, C. Barschel, E. Bravin, G. Bregliozzi, N. Chritin, B. Dehning, M. Ferro-Luzzi, M. Giovannozzi, R. Jacobsson, L.K. Jensen, R.J. Jones, V. Kain, R. Matev, M.N. Rihl, V. Salustino Guimaraes, R. Veness, B. Würkner
CERN, Geneva, Switzerland
A. Bay, F. Blanc, S. Gianì, O. Girard, G.J. Haefeli, P. Hopchev, A. Kuonen, T. Nakada, O. Schneider, M. Tobin, Q.D. Veyrat, Z. Xu
EPFL, Lausanne, Switzerland
R. Greim, W. Karpinski, S. Schael, A. Schultz von Dratzig, G. Schwering, M. Wlochal
RWTH, Aachen, Germany

The Beam Gas Vertex (BGV) monitor is being developed as part of the High Luminosity LHC project with the aim of providing measurements with less than 5% error on the beam size with an integration time of 5 minutes. It will be the only instrument capable of non-invasive beam size measurement throughout the LHC acceleration cycle with high intensity physics beams. A prototype BGV monitor has been installed in the LHC since 2016. Particles emerging from beam-gas interactions are recorded by 2 planes of scintillating fibre detectors. Based on vertex reconstruction of the detected tracks, this monitor allows non-invasive measurement of beam profiles with bunch-by-bunch resolution. A dedicated computer farm performs track reconstruction and event analysis on-line so that real-time beam profile measurements can be provided. Data taken in 2016 and 2017 will be presented that demonstrate the power of the method.

Slides WE3AB1 [2.276 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WE3AB1

Export •

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

WEPCC03

Performance Assessment of Pre-Series Fast Beam Wire Scanner Prototypes for the Upgrade of the CERN LHC Injector Complex

338

J.L. Sirvent, P. Andersson, W. Andreazza, B. Dehning, J. Emery, L. Garcia, D. Gudkov, F. Roncarolo, J. Tassan-Viol, G. Trad, R. Veness
CERN, Geneva, Switzerland

A new generation of beam wire scanner (BWS), for transversal beam profile monitoring, is under development on the framework of the LHC Injector Upgrade project at CERN. Two pre-series prototypes have been built and installed in the Super Proton Synchrotron and Proton Synchrotron Booster, to assess the performance of the upgraded BWS concept. This contribution shows the outcome of the measurement campaigns carried out on the first BWS prototypes, both in the laboratory and with proton beams. An evaluation of a high dynamic range acquisition system for the measurement of the secondary showers produced by the beam-wire interaction is also presented.

Poster WEPCC03 [2.080 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WEPCC03

Export •

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

WEPCC08

Development of a Fluorescence Based Gas Sheet Profile Monitor for Use With Electron Lenses: Optical System Design and Preparatory Experiments

359

S. Udrea, P. Forck
GSI, Darmstadt, Germany
E. Barrios Diaz, N. Chritin, O.R. Jones, P. Magagnin, G. Schneider, R. Veness
CERN, Geneva, Switzerland
V. Tzoganis, C.P. Welsch, H.D. Zhang
Cockcroft Institute, Warrington, Cheshire, United Kingdom

A hollow electron lens is presently under study as a possible addition to the collimation system for the high luminosity upgrade of the LHC (HL-LHC), while an electron lens system is also proposed for space charge compensation in the SIS-18 synchrotron for the high intensities at the future FAIR facility. For effective operation, a precise alignment is necessary between the high energy hadron beam and the low energy electron beam. In order to achieve this, a beam diagnostics setup based on an intersecting gas sheet and the observation of beam-induced fluorescence is under development. In this contribution we give an account of the design and performance of the optical detection system and report on recent preparatory experiments performed using a laboratory gas curtain Setup.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WEPCC08

Export •

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

WEPWC02

Construction of a Mobile Irradiation Instrument for the Verification of the CERN LHC Beam Loss Monitoring System

450

D. Gudkov, V. Grishin, R. Veness, C. Zamantzas
CERN, Geneva, Switzerland

The strategy for machine protection and quench prevention of the super-conducting elements of the Large Hadron Collider (LHC) at the European Organisation for Nuclear Research (CERN) is heavily reliant on its beam loss monitoring system. This is one of the most complex and large-scale beam instrumentation systems deployed anywhere in the world. In order to augment the system's dependability and verify the correct connection of each of the approximately 4000 detectors distributed around the 27 km LHC ring to its assigned channel in the electronic system, a mobile irradiation instrument has been designed and built. This instrument can be easily and safely transported along the LHC tunnel and imitate a localised beam loss at each BLM detector. This paper describes the concept of the instrument, its engineering design, the safety measures included and recent upgrades. Possible future improvements of the device are also considered.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-WEPWC02

Export •

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