Radiation hardness study for the COMET Phase-I electronics

Authors

Yu Nakazawa ^a, Yuki Fujii ^b, Ewen Gillies ^c, Eitaro Hamada ^d, Youichi Igarashi ^d, MyeongJaeLee ^e, Manabu Moritsu ^d, Yugo Matsuda ^a, Yuta Miyazaki ^f, Yuki Nakai ^f, Hiroaki Natori ^e ¹, Kou Oishi ^f ², Akira Sato ^a, Yoshi Uchida ^c, Kazuki Ueno ^d, Hiroshi Yamaguchi ^d, BeomKi Yeo ^e, Hisataka Yoshida ^a, Jie Zhang ^g

Affiliations

^a Department of Physics, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
b School of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia
c Department of Physics, Imperial College London, London SW7 2AZ, UK
d Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
e Center for Axion and Precision Physics Research, Institute for Basic Science, Daejeon 34051, South Korea
f Department of Physics, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
g State Key Laboratory of Particle Detection and Electronics, Institute of High Energy Physics, CAS, Beijing 100049, China

Journal

Published Date

12/9/19

DOI

Abstract

Radiation damage on front-end readout and trigger electronics is an important issue in the COMET Phase-I experiment at J-PARC, which plans to search for the neutrinoless transition of a muon to an electron. To produce an intense muon beam, a high-power proton beam impinges on a graphite target, resulting in a high-radiation environment. We require radiation tolerance to a total dose of and equivalent neutron fluence of ¹² n_eq cm including a safety factor of 5 over the duration of the physics measurement. The use of commercially-available electronics components which have high radiation tolerance, if such components can be secured, is desirable in such an environment. The radiation hardness of commercial electronic components has been evaluated in gamma-ray and neutron irradiation tests. As results of these tests, voltage regulators, ADCs, DACs, and several other components were found to have enough tolerance to both gamma-ray and neutron irradiation at the level we require.