IBIC2019 - List of Keywords (luminosity)

Paper	Title	Other Keywords	Page
MOAO02	Beam Instrumentation and Diagnostics for High Luminosity LHC	vacuum, 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)

WEAO04	Beam Measurements at the CERN SPS Using Interferometric Electro-Optic Pickups	pick-up, simulation, laser, proton	457
	A. Arteche, A. Bosco, S.M. Gibson Royal Holloway, University of London, Surrey, United Kingdom S.E. Bashforth, A. Bosco, S.M. Gibson JAI, Egham, Surrey, United Kingdom M. Krupa, T. Lefèvre CERN, Geneva, Switzerland
	Funding: Work supported by UK STFC grants ST/N001583/1, JAI at Royal Holloway University of London and CERN. Since 2016 a prototype electro-optic pickup has been installed on the SPS as part of the ongoing development of a high bandwidth electro-optic beam position monitor for the High Luminosity LHC. Following the success of initial beam signal observations with the prototype, improvements of the sensitivity and stability of the pickup have become the main focus of the project. A new concept has been developed which uses an interferometric technique to measure the image field of a passing bunch. One arm of an interferometer passes through an electro-optic lithium niobate crystal, embedded in a pickup, whereas the other arm bypasses. The recombination after the pickup results in an interference pattern that changes as a bunch passes by, due to the electro-optic response of the crystal to the image field. This technique enhances the sensitivity to the field and improves control of the working point. Results from high intensity beams at the SPS are presented. These include a comparison between two different interferometric configurations that were tested on different pickups with similar beam conditions. The stability is assessed by frequency scanning interferometry during beam operation.
	Slides WEAO04 [52.252 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEAO04
About •	paper received ※ 10 September 2019 paper accepted ※ 12 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP030	Betatron Phase Advance Measurements Using the Gated Turn-by-turn Monitors at SuperKEKB	betatron, coupling, detector, simulation	591
	G. Mitsuka, K. Mori, M. Tobiyama KEK, Ibaraki, Japan
	In the SuperKEKB commissioning Phases 2 (Feb.-Jul., 2018) and 3 (from Mar. 2019), the betatron phase advances between adjacent beam position monitors have been measured using a total of 138 gated turn-by-turn monitors. A fast RF gating of the monitors enables turn-by-turn beam position detections by focusing only on an artificially-excited non-colliding bunch, while leaving colliding bunches unaffected. Betatron phase advances measured by the gated turn-by-turn monitors and accordingly obtained betatron functions were consistent with the closed orbit measurements. High signal-to-noise ratio were achieved by advanced signal extraction methods such as NAFF, SVD, and independent component analysis.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP030
About •	paper received ※ 03 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)

Paper

Title

Other Keywords

Page

MOAO02

Beam Instrumentation and Diagnostics for High Luminosity LHC

vacuum, 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)

WEAO04

Beam Measurements at the CERN SPS Using Interferometric Electro-Optic Pickups

pick-up, simulation, laser, proton

457

A. Arteche, A. Bosco, S.M. Gibson
Royal Holloway, University of London, Surrey, United Kingdom
S.E. Bashforth, A. Bosco, S.M. Gibson
JAI, Egham, Surrey, United Kingdom
M. Krupa, T. Lefèvre
CERN, Geneva, Switzerland

Funding: Work supported by UK STFC grants ST/N001583/1, JAI at Royal Holloway University of London and CERN.
Since 2016 a prototype electro-optic pickup has been installed on the SPS as part of the ongoing development of a high bandwidth electro-optic beam position monitor for the High Luminosity LHC. Following the success of initial beam signal observations with the prototype, improvements of the sensitivity and stability of the pickup have become the main focus of the project. A new concept has been developed which uses an interferometric technique to measure the image field of a passing bunch. One arm of an interferometer passes through an electro-optic lithium niobate crystal, embedded in a pickup, whereas the other arm bypasses. The recombination after the pickup results in an interference pattern that changes as a bunch passes by, due to the electro-optic response of the crystal to the image field. This technique enhances the sensitivity to the field and improves control of the working point. Results from high intensity beams at the SPS are presented. These include a comparison between two different interferometric configurations that were tested on different pickups with similar beam conditions. The stability is assessed by frequency scanning interferometry during beam operation.

Slides WEAO04 [52.252 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEAO04

About •

paper received ※ 10 September 2019 paper accepted ※ 12 September 2019 issue date ※ 10 November 2019

Export •

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

WEPP030

Betatron Phase Advance Measurements Using the Gated Turn-by-turn Monitors at SuperKEKB

betatron, coupling, detector, simulation

591

G. Mitsuka, K. Mori, M. Tobiyama
KEK, Ibaraki, Japan

In the SuperKEKB commissioning Phases 2 (Feb.-Jul., 2018) and 3 (from Mar. 2019), the betatron phase advances between adjacent beam position monitors have been measured using a total of 138 gated turn-by-turn monitors. A fast RF gating of the monitors enables turn-by-turn beam position detections by focusing only on an artificially-excited non-colliding bunch, while leaving colliding bunches unaffected. Betatron phase advances measured by the gated turn-by-turn monitors and accordingly obtained betatron functions were consistent with the closed orbit measurements. High signal-to-noise ratio were achieved by advanced signal extraction methods such as NAFF, SVD, and independent component analysis.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP030

About •

paper received ※ 03 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)