Performance of a real-size, low resistivity resistive plate chamber at GIF++ Using self-trigger electronics for the Muon Chamber of the CBM Experiment

Abstract The Compress Baryonic Matter experiment (CBM) at the upcoming Facility for Anti-proton and Ion Research, a fixed-target experiment with high interaction rates, aims to study the equation of state of baryon-dominated, strongly interacting matter ( μ B ∼ 540–800 MeV). The Muon Chamber is a key sub-system designed to detect dimuons decaying from low mass vector meson and Charmonia. This paper focuses on the performance of a real size Resistive Plate Chamber prototype, designed for the 3 rd station of MuCh. A pad readout with progressive geometry as pickup panel along with the Common Readout Interfaces based DAQ was employed for the prototype test at GIF++. The performance of the detector, in terms of its efficiency, time resolution, rate handling capability, and cluster size for various pad sizes, was evaluated in two scenarios: a standalone muon beam and a muon beam embedded in various photon background. This manuscript presents the test results of the RPC conducted during the September 2023 beam time at GIF++ at CERN, Switzerland.