Assembly and Characterization of Resistive Plate Chambers in India for the CMS Detector

摘要

The Compact Muon Solenoid is a general purpose detector being operated at Large Hadron Collider facility at CERN. The RE4 (fourth layer of RPC end-cap) upgrade project was envisaged to improve the muon trigger efficiency in the pseudo-rapidity range of 1.2-1.6 for LHC run at energy of 13 TeV and luminosity of 10~(34)cm~2 s~(-1). A total of 200 Resistive Plate Chambers were built for the upgrade at three assembly sites in Belgium, CERN and India. The assembly and characterization of 50 chambers was carried out jointly by Bhabha Atomic Research Center and Panjab University in India. The gas-gaps from South Korea underwent mechanical tests for leak and popped spacers, followed by electrical tests for leakage currents. Each assembled chamber was characterized by evaluation of efficiency, cluster size, noise and strip profile and are successfuly installed at Compact Muon Solenoid detector.