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Summer Research Fellowship Programme of India's Science Academies

Analysis of RPC and the task performed by SF6 in its operation and Characterization of Scintillator and NINO preamplifier discriminator

Shivam Joshi

Applied Physics Department, Sardar Vallabhbhai National Institute of Technology

Prof. Vivek Datar

India-based Neutrino Observatory, Department of High Energy Physics, Tata Institute of Fundamental Research, Mumbai

Abstract

India-based Neutrino Observatory (INO) is a highly ambitious, first of its kind Indian research project aimed at indirectly detecting and studying the extremely elusive neutrinos. The proposed ICAL (Iron Calorimeter) detector with RPCs (Resistive Plate Chamber) serving as the active detector component, will be the only detector in the world, capable of segregating neutrinos from their anti-particles and will hopefully shed some light on the ordering of the 3 neutrino masses (mass hierarchy of neutrinos). In association with the INO project, the internship was mainly focussed on studying the operation and characterization of RPC and the complete detection unit. Also, inspection and assembling of RPC was undertaken. A study was conducted to understand the role of SF6 gas in regulating certain operational parameters. This experiment was done after performing recalibration of the MFC using water displacement method.

One part of the internship was dedicated to studying the characterization and detection process in Scintillator detectors. Efficiency of various scintillators were calculated, using other scintillators for trigger generation with n-fold coincidence logic. Muon lifetime was calculated as it decays inside the scintillator using a scintillator block, PMT and an elaborate time measurement circuit.

Finally, parameterization of a bulk of NINO preamplifier discriminators, to be used in conjunction with the ICAL detector at the INO project was undertaken.

Keywords: India-based Neutrino Observatory, Particle detectors, RPC, Scintillator, Muon lifetime, NINO

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