Study of discharges observed in the CMS GE1/1 station during LHC Run-3

IF 1.5 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2025-02-22 DOI:10.1016/j.nima.2025.170330

S. Calzaferri, CMS Muon Group

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引用次数: 0

Abstract

Since July 2022, GE1/1, the first station using Gas Electron Multiplier (GEM) technology in the Compact Muon Solenoid (CMS) experiment, has been participating in the data-taking in proton–proton (p–p) collisions. This station is the first of three (GE1/1, GE2/1 and ME0) planned to be installed in CMS, to cope with the challenging conditions given by the upgrade of luminosity of the Large Hadron Collider (High-Luminosity LHC program, or HL-LHC) (Colaleo et al., 2015) . This contribution illustrates in detail the analysis developed to monitor the discharge rate per each LHC fill and the strategies developed to operate the chambers safely. An important intervention was the modification of the High Voltage (HV) power system, to correctly power detectors affected by short circuits in the GEM foils. The contribution will also present the current status of operation for GE1/1 in Run-3 in 2023 and the next steps to be implemented to improve the behaviour of the detectors.

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来源期刊

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment 物理-光谱学

CiteScore

3.20

自引率

21.40%

发文量

787

审稿时长

1 months

期刊介绍： Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section. Theoretical as well as experimental papers are accepted.