Performance of the BM@N GEM/CSC tracking system at the Nuclotron beam

Abstract

BM@N (Baryonic Matter at the Nuclotron) is a fixed target experiment aimed to study nuclear matter in the relativistic heavy-ion collisions at the Nuclotron accelerator in JINR. The BM@N tracking system is based on Gas Electron Multipliers (GEM) detectors mounted inside the BM@N analyzing magnet. The Cathode Strip Chamber (CSC) is installed outside the magnet. The CSC is used for improvement of particles momentum identification. The structure of the GEM detectors and the CSC prototype and the results of study of their characteristics are presented. The GEM detectors and CSC are integrated into the BM@N experimental setup and data acquisition system. The results of first tests of the GEM tracking system and CSC in last runs are shortly reviewed.

Status of the GEM/CSC tracking system of the BM@N experiment

“…Front-end electronics is based on the charge sensitive pre-amplifier chip VA162 and modified chip VA163 (IDEAS) [2]. Detailed description of BM@N FEE and DAQ system can be found in [3].…”

“…Outer tracker of the BM@N in final configuration is based on cathode strip chambers and time-offlight detectors. The design of first CSC 1129 × 1065 mm 2 produced in JINR is described in detail in [3]. First Nuclotron beam test of the CSC was performed in beams of C, Ar and Kr ions in March 2018: the chamber was installed in front of ToF-400 to check its performance as outer tracker for heavy ions (figure 11).…”

Prospects for the study of baryon-rich matter at new facilities

“…Its physics focus is the investigation of the nuclear equationof-state at high net-baryon densities through the measurement of the collective flow of identified hadrons and the excitation function of hyperons. The experiment was already commissioned with light ion beams (Ar, Kr) from the Nuclotron in March 2018 [9]. Experiments with heavy beams are expected for 2020.…”