A Cosmic Muon Veto (CMV) detector using extruded plastic scintillators is being designed around the mini-Iron Calorimeter (mini-ICAL) detector at the transit campus of the India based Neutrino Observatory, Madurai for the feasibility study of shallow depth underground experiments. The scintillation signals that are produced in the plastic due to muon trajectories are absorbed by wavelength shifting (WLS) fibres. The WLS fibres re-emit photons of longer wavelengths and propagate those to silicon photo-multipliers (SiPMs). The SiPMs detect these photons, producing electronic signals. The CMV detector will use more than 700 scintillators to cover the mini-ICAL detector and will require around 3000 SiPMs. The design goal for the cosmic muon veto efficiency of the CMV is >99.99%. Hence, every SiPM used in the detector needs to be tested and characterised to satisfy the design goal of CMV. A mass testing system was developed for the measurement of gain and choice of the overvoltage (Vov) of each SiPMs using an LED driver. The Vov is obtained by studying the noise rate, the gain of the SiPM. This paper describes the experimental setup used to test the SiPMs characteristics along with detailed studies of those characteristics as a function of temperature.
@article{arxiv.2203.16963,
title = {Qualification study of SiPMs on a large scale for the CMVD Experiment},
author = {Mamta Jangra and Raj Bhupen and Gobinda Majumder and Kiran Gothe and Mandar Saraf and Nandkishor Parmar and B. Satyanarayana and R. R. Shinde and Shobha K. Rao and Suresh S Upadhya and Vivek M Datar and Douglas A. Glenzinski and Alan Bross and Anna Pla-Dalmau and Vishnu V. Zutshi and Robert Craig Group and E Craig Dukes},
journal= {arXiv preprint arXiv:2203.16963},
year = {2022}
}