A Cosmic Muon Veto Detector (CMVD) is being built around the mini-Iron Calorimeter (mini-ICAL) detector at the transit campus of the India based Neutrino Observatory, Madurai. The CMV detector will be made using extruded plastic scintillators with embedded wavelength shifting (WLS) fibres which propagate re-emitted photons of longer wavelengths to silicon photo-multipliers (SiPMs). The SiPMs detect these scintillation photons, producing electronic signals. The design goal for the cosmic muon veto efficiency of the CMV is >99.99\% and fake veto rate less than 10−5. A testing system was developed, using an LED driver, to measure the noise rate and gain of each SiPM, and thus determine its overvoltage (Vov). This paper describes the test results and the analysed characteristics of about 3.5k SiPMs.
@article{arxiv.2208.11446,
title = {Mass testing of SiPMs for the CMVD at IICHEP},
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:2208.11446},
year = {2022}
}