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TY - CONF AU - Würkner, B. AU - Alexopoulos, A. AU - Barschel, C. AU - Bay, A. AU - Blanc, F. AU - Bravin, E. AU - Bregliozzi, G. AU - Chritin, N. AU - Dehning, B. AU - Ferro-Luzzi, M. AU - Gianì, S. AU - Giovannozzi, M. AU - Girard, O. AU - Greim, R. AU - Haefeli, G.J. AU - Hopchev, P. AU - Jacobsson, R. AU - Jensen, L.K. AU - Jones, O.R. AU - Kain, V. AU - Kieffer, R. AU - Kirn, T. AU - Kuonen, A. AU - Matev, R. AU - Nakada, T. AU - Rihl, M.N. AU - Salustino Guimaraes, V. AU - Schael, S. AU - Schneider, O. AU - Tobin, M. AU - Veness, R. AU - Vlachos, S. AU - Wlochal, M. AU - Xu, Z. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Measuring Beamsize with the LHC Beam Gas Vertex Detector J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - 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 beam-gas interaction vertices using high precision tracking detectors. To confirm the feasibility of such a device, a demonstrator based on eight modules of scintillating fiber 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 of better than 5µm (for a gaussian beam with a σ of 200µm). 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. The results obtained from all the data gathered over the past 3 years will be presented and compared to measurements from other beam profile monitors. Some ideas for improvements for the final HL-LHC instrument will also be discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2680 EP - 2683 KW - emittance KW - detector KW - proton KW - injection KW - luminosity DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPGW084 UR - http://jacow.org/ipac2019/papers/wepgw084.pdf ER -