Mass testing of SiPMs for the CMVD at IICHEP

SciPost Physics Proceedings Pub Date : 2023-09-29 DOI:10.21468/scipostphysproc.13.025

Mamta Jangra, Raj Bhupen, Gobinda Majumder, Kiran Gothe, Mandar Saraf, Nandkishor Parmar, Bheesette Satyanarayana, Ravindra Shinde, Shobha Rao, Suresh S. Upadhya, Vivek M. Datar, Douglas A. Glenzinski, Alan Bross, Anna Pla-Dalmau, Vishnu V. Zutshi, Robert Craig Group, Edmond Craig Dukes

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Abstract

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} −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 (V_ {ov} ov ). This paper describes the test results and the analysed characteristics of about 3.5k SiPMs.

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IICHEP对CMVD的sipm进行大规模测试

一个宇宙介子否决探测器(CMVD)正在围绕位于印度马杜赖中微子天文台过境校区的迷你铁量热计(mini-ICAL)探测器建造。CMV探测器将使用嵌入波长移位(WLS)光纤的挤出塑料闪烁体制成，该闪烁体将长波长的重发射光子传播到硅光倍增器(sipm)上。sipm探测到这些闪烁光子，产生电子信号。CMV的宇宙介子否决效率设计目标为>99.99%，伪否决率小于10 ^{-5}−5。设计了一个测试系统，利用LED驱动器测量每个SiPM的噪声率和增益，从而确定其过电压(V_ {ov} ov)。本文介绍了约3.5k sipm的测试结果和分析特性。

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