CERN Accelerating science

Published Articles
Report number	CERN-ACC-2019-205
Title	Measuring beam size with the LHC Beam Gas Vertex detector
Author(s)	Würkner, Benedikt (CERN) ; Alexopoulos, Andreas (CERN) ; Barschel, Colin (CERN) ; Bay, Aurelio (Ecole Polytechnique, Lausanne) ; Blanc, Frederic (Ecole Polytechnique, Lausanne) ; Bravin, Enrico (CERN) ; Bregliozzi, Giuseppe (CERN) ; Chritin, Nicolas (CERN) ; Dehning, Bernd (CERN) ; Ferro-Luzzi, Massimiliano (CERN) ; Gianì, Sebastiana (Ecole Polytechnique, Lausanne) ; Giovannozzi, Massimo (CERN) ; Girard, Olivier (Ecole Polytechnique, Lausanne) ; Greim, Roman (Aachen, Tech. Hochsch.) ; Haefeli, Guido (Ecole Polytechnique, Lausanne) ; Hopchev, Plamen (Ecole Polytechnique, Lausanne) ; Jacobsson, Richard (CERN) ; Jensen, Lars (CERN) ; Jones, Owain Rhodri (CERN) ; Kain, Verena (CERN) ; Kieffer, Robert (CERN ; Royal Holloway, U. of London) ; Kirn, Thomas (Aachen, Tech. Hochsch.) ; Kuonen, Axel (Ecole Polytechnique, Lausanne) ; Matev, Rosen (CERN) ; Nakada, Tatsuya (Ecole Polytechnique, Lausanne) ; Rihl, Mariana (CERN) ; Salustino Guimaraes, Valdir (CERN) ; Schael, Stefan (Aachen, Tech. Hochsch.) ; Schneider, Olivier (Ecole Polytechnique, Lausanne) ; Tobin, Mark (Ecole Polytechnique, Lausanne) ; Veness, Raymond (CERN) ; Vlachos, Sotiris (CERN) ; Wlochal, Michael (Aachen, Tech. Hochsch.) ; Xu, Zhirui (Ecole Polytechnique, Lausanne)
Publication	2019
Number of pages	4
In:	10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPGW084
DOI	10.18429/JACoW-IPAC2019-WEPGW084
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN HL-LHC
Abstract	The Beam Gas Vertex detector (BGV) is an innovative beam profile monitor being developed as part of the High Luminosity LHC (HL-LHC) project at CERN. The goal is to continually measure the transverse beam size by reconstructing tracks originating from beam-gas interactions using high precision tracking detectors. To confirm the feasibility of such a device, a demonstrator based on eight modules of scintillating fibre detectors has been constructed, installed in the LHC and operated for the past 3 years. It will be shown that using the BGV the average transverse beam size can be obtained with a statistical accuracy better than 5 μm (assuming a Gaussian beam with a sigma of  200 μm). This precision is obtained with an integration time of less than one minute. In addition, the BGV measures the size of individual bunches with a statistical accuracy of better than 5 % within 5 minutes. Results obtained from data acquired in 2018 will be presented and compared to measurements from other beam profile monitors.
Copyright/License	Publication: (License: CC-BY-3.0)

Corresponding record in: Inspire