Development of RPCs for INO

B.Satyanarayana

Department of High Energy Physics,

Tata Institute of Fundamental Research

Homi Bhabha Road, Colaba, Mumbai, 400005, INDIA

India-based Neutrino Observatory(INO) collaboration consisting of several Indian Institutions and Universities is currently involved in a feasibility study towards building a neutrino detector in India. We are currently planning for a large and modular detector consisting of 6 cm thick magnetised iron plates interleaved with glass Resistive Plate Chambers (RPCs) used as active detector elements. Good tracking and energy resolution, accurate directionality capability and ease of construction were the parameters which have favoured choice of this type of detector.

Several small area RPCs were developed at TIFR and their performance is being studied using a scintillator paddle based Cosmic Ray Muon telescope. We present in this talk, preliminary results on detector efficiencies, time resolution, pulse height distribution and inter-channel crosstalk obtained using different proportions of gases in the mixture.