0587885 - FZÚ 2025 RIV US eng J - Journal Article
Aad, G. - Aakvaag, E. - Abbott, B. - Chudoba, Jiří - Federičová, Pavla - Hejbal, Jiří - Jačka, Petr - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Latoňová, Věra - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2962 authors
Beam-induced backgrounds measured in the ATLAS detector during local gas injection into the LHC beam vacuum.
Journal of Instrumentation. Roč. 19, č. 6 (2024), č. článku P06014. ISSN 1748-0221. E-ISSN 1748-0221
R&D Projects: GA MŠMT(CZ) EH22_008/0004632
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:68378271
Keywords : ATLAS * CERN LHC Coll * gas: pressure * numerical calculations: Monte Carlo * FLUKA
OECD category: Particles and field physics
Impact factor: 1.3, year: 2022
Method of publishing: Open access

Inelastic beam-gas collisions at the Large Hadron Collider(LHC), within a few hundred metres of the ATLAS experiment, areknown to give the dominant contribution to beam backgrounds. Theseare monitored by ATLAS with a dedicated Beam Conditions Monitor(BCM) and with the rate of fake jets in the calorimeters. These twomethods are complementary since the BCM probes backgrounds justaround the beam pipe while fake jets are observed at radii of up toseveral metres. In order to quantify the correlation between theresidual gas density in the LHC beam vacuum and the experimentalbackgrounds recorded by ATLAS, several dedicated tests wereperformed during LHC Run 2. Local pressure bumps, with a gasdensity several orders of magnitude higher than during normaloperation, were introduced at different locations.
Permanent Link: https://hdl.handle.net/11104/0354928