Speaker
Description
The India-based Neutrino Observatory(INO) is a mega science project aimed at building a large underground laboratory to study the atmospheric neutrinos. INO will host a 50 kton magnetized iron calorimeter detector (ICAL) in which Resistive Plate Chambers(RPCs) will be the active detector elements. In ICAL, 28,800 glass RPCs of 2 m × 2 m size will be operated in the avalanche mode. Study of the performance of RPC detectors of various glass samples is crucial to optimize the parameters of the ICAL RPCs. RPCs of dimension 30 cm × 30 cm are made with glass samples from different glass manufactures and operated in avalanche mode with a gas mixture that consists of R134a(C2H2F4, 95.2%), Isobutane(C4H10, 4.5%) and Sulfur hexafluoride(SF6, 0.3%). We have studied the performance of these RPCs at the same ambient conditions. The study of the detector efficiency, noise rate and charge resolution will be reported. We have observed that the operating high voltage varies from 10 kilo volt to 13 kilo volt for the RPCs made of different glass samples. To investigate further, we have fabricated RPCs with different glass thickness and studied in detail it's performance in the same ambient conditions. Detailed results will be presented in the conference.
