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Status of the LHC emittance diagnostics
/ Trad, G (CERN) ; Alexopoulos, A (CERN) ; Baud, G (CERN) ; Bravin, E (CERN) ; Roncarolo, F (CERN) ; Vlachos, S (CERN) ; Wurkner, B (CERN)
Measuring the beam transverse emittance is fundamental in every accelerator, in
particular for the LHC, where its precise determination and preservation is
essential to maximize the luminosity and thus the performance of the colliding
beams. In this contribution, a review of the status of the synchrotron radiation
monitors, the beam gas vertex detector and the wirescanners will be presented
alongside the assessment of the obtained performance [...]
2019 - 5 p.
- Published in : (2019) , pp. 147-151
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.147-151
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3.
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New Beam Position Monitors for the CERN LINAC3 to LEIR Ion Beam Transfer Line
/ Søby, Lars (CERN) ; Baud, Guillaume (CERN) ; Bozzolan, Michele (CERN) ; Scrivens, Richard (CERN)
The ion 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. [...]
JACoW, 2019 - 4 p.
- Published in : 10.18429/JACoW-IBIC2018-TUPB14
Published fulltext: PDF;
In : 7th International Beam Instrumentation Conference, Shanghai, China, 9 - 13 Sep, 2018, pp.TUPB14
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4.
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Transverse Coupling Measurements With High Intensity Beams Using Driven Oscillations
/ Persson, Tobias (CERN) ; Baud, Guillaume (CERN) ; Buffat, Xavier (CERN) ; Coello de Portugal, Jaime Maria (CERN) ; Fol, Elena (CERN) ; Fuchsberger, Kajetan (CERN) ; Gabriel, Mathieu (CERN) ; Gąsior, Marek (CERN) ; Giovannozzi, Massimo (CERN) ; Hemelsoet, Georges-Henry (CERN) et al.
Transverse coupling has been linked to instabilities and reduction in dynamic aperture and is hence a crucial parameter to control in the LHC. In this article we describe the development to use driven oscillations to measure the transverse coupling with high intensity beams. [...]
CERN-ACC-2018-079.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-MOPMF047
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF047
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5.
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Performance of the CERN Low Energy Ion Ring (LEIR) with Xenon beams
/ Alemany-Fernández, Reyes (CERN) ; Albright, Simon (CERN) ; Andujar, Oscar (CERN) ; Angoletta, Maria Elena (CERN) ; Axensalva, Jerome (CERN) ; Bartosik, Hannes (CERN) ; Baud, Guillaume (CERN) ; Biancacci, Nicolo (CERN) ; Bozzolan, Michele (CERN) ; Cettour Cave, Stephane (CERN) et al.
In 2017 the CERN Low Energy Ion Ring demonstrated once more the feasibility of injecting, accumulating, cooling and accelerating a new nuclei, $^{129}$Xe${39+}$. The operation of this new ion species started at the beginning of March with the start up of the xenon ion source and the Linac3. [...]
CERN-ACC-2018-144.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-TUPAF020
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF020
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Status of the tune and orbit measurements and corrections and testing strategy
/ Andersen, M (CERN) ; Baud, G (CERN) ; Betz, M (CERN) ; Boccard, C (CERN) ; Boccardi, A (CERN) ; Calvo, E (CERN) ; Fullerton, J (CERN) ; Gasior, M (CERN) ; Jackson, S (CERN) ; Jensen, L (CERN) et al.
An upgrade of LHC beam instrumentation has been performed during the Long
Shutdown 1. In this context both the beam position and tune monitoring systems,
as well as their respective feedback systems have been reviewed and modified.
This contribution presents an overview of the major hardware and software
modifications performed during LS1 and the expected performance with 6.5TeV
beams in 2015..
Geneva : CERN, 2014 - 4 p.
- Published in : (2014) , pp. 153-156
Fulltext: PDF;
In : 5th Evian Workshop on LHC beam operation, Evian-les-Bains, France, 2 - 4 Jun 2014, pp.153-156
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Status of the beam profile measurements at the LHC
/ Trad, G (CERN) ; Baud, G (CERN) ; Bravin, E (CERN) ; Dehning, B (CERN) ; Ferroluzzi, M (CERN) ; Goldblatt, A (CERN) ; Piselli, E (CERN) ; Roncarolo, F (CERN) ; Storey, J (CERN) ; Veyrat, Q (CERN)
During LS1, the various instruments for beam profile measurement at the LHC were
upgraded to cope with the beam energy increase. In this contribution, a review
of the status of the synchrotron radiation monitors, the beam gas ionization
monitors, the beam gas vertex detector and the wirescanners will be presented
alongside the assessment of the obtained performance. [...]
Geneva : CERN, 2016 - 8 p.
- Published in : (2016) , pp. 163-170
Fulltext: PDF;
In : 6th Evian Workshop on LHC beam operation, Evian Les Bains, France, 15 - 17 Dec 2015, pp.163-170
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9.
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Status of the beam instrumentation at the LHC
/ Trad, G (CERN) ; Pedersen, S Bart (CERN) ; Baud, G (CERN) ; Bravin, E (CERN) ; Gasior, M (CERN) ; Jones, R (CERN) ; Roncarolo, F (CERN) ; Olexa, J (CERN) ; Lefevre, T (CERN) ; Xu, C (CERN) et al.
In this contribution, a review of the beam instrumentation status in the LHC 2016 Run is presented. The treated devices are the beam loss monitors based on diamond detectors, the beam position monitors, the wire-scanners, the beam gas vertex detector and the synchrotron radiation monitors. [...]
Geneva : CERN, 2017 - 8 p.
- Published in : (2017) , pp. 185-192
Fulltext: PDF;
In : 7th Evian Workshop on LHC beam operation, Evian Les Bains, France, 13 - 15 Dec 2016, pp.185-192
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10.
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Optics control in 2016
/ Persson, T (CERN) ; Baud, G (CERN) ; Carlier, F (CERN) ; Coello De Portugal, J ; Fol, E ; A ; Valdivieso, Garcia-Tabares ; Gasior, M ; Langner, A ; Maclean, E H et al.
In 2016 the fi-functions at the interaction points of ATLAS and CMS have been squeezed down to 0.4 m. This is below the design fi" = 0.55 m at 7 TeV and has been instrumental to surpass the design luminosity. [...]
Geneva : CERN, 2017 - 6 p.
- Published in : (2017) , pp. 77-82
Fulltext: PDF;
In : 7th Evian Workshop on LHC beam operation, Evian Les Bains, France, 13 - 15 Dec 2016, pp.77-82
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