CsI calorimeter for the J-PARC KOTO experiment

Sato, K.; Lee, J. W.; Banno, S.; Campbell, M.; Comfort, J.; Furukawa, T.; Iwai, E.; Kawasaki, N.; Komatsubara, T. K.; Lim, G. Y.; Maeda, Y.; Masuda, T.; Matsumura, T.; Mcfarland, D.; Murayama, R.; Naito, D.; Nakaya, Y.; Nanjo, H.; Nomura, T.; Odani, Y.; Ota, T.; Ri, Y. D.; Sasaki, M.; Sasao, N.; Seki, S.; Shimogawa, T.; Shinkawa, T.; Shiomi, K.; Sugiyama, Y.; Suzuki, S.; Tajima, Y.; Tecchio, M.; Togawa, M.; Yamanaka, T.; Yanagida, Y.; Yokota, H.; Yoshimoto, H.; Wah, Y. W.; Watanabe, H.; Xu, J.

doi:10.1016/j.nima.2020.164527

Title: CsI calorimeter for the J-PARC KOTO experiment

Journal Article · Fri Aug 14 00:00:00 EDT 2020 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2020.164527· OSTI ID:1850840

Sato, K. ^[1]; Lee, J. W. ^[1]; Banno, S. ^[1]; Campbell, M. ^[2]; Comfort, J. ^[3]; Furukawa, T. ^[4]; Iwai, E. ^[1]; Kawasaki, N. ^[5]; Komatsubara, T. K. ^[6]; Lim, G. Y. ^[6]; Maeda, Y.; Masuda, T.; Matsumura, T.; Mcfarland, D.; Murayama, R.; Naito, D.; Nakaya, Y.; Nanjo, H.; Nomura, T.; Odani, Y. more »

Osaka Univ. (Japan). Dept. of Physics
Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Physics
Arizona State Univ., Tempe, AZ (United States). Dept. of Physics
Saga Univ. (Japan). Dept. of Physics
Kyoto Univ. (Japan). Dept. of Physics
High Energy Accelerator Research Organization (KEK), Tsukuba (Japan); Japan Proton Accelator Research Complex (J-PARC), Ibaraki (Japan)

An electromagnetic calorimeter made of undoped CsI crystals is used in the J-PARC KOTO experiment to search for new physics beyond the standard model with the KL → π 0 νν¯ decay. The calorimeter is designed to operate in vacuum of 0.1 Pa and in a high-rate environment where the counting rate due to KL decays is O(100) kHz. A special method to calibrate the calorimeter during the data taking without using a tracking system for charged particles is reported. The energy, position, and timing resolutions of the calorimeter were evaluated in several beam tests, and the resolutions satisfy the required performance. Finally, the energy resolution with the total energy E is 0.66 ⊕ 1.81/ √ E[GeV]% in the inner region of the calorimeter.

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Research Organization:: Univ. of Chicago, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); JSPS KAKENHI

Grant/Contract Number:: SC0004407; JP18071006; JP23224007

OSTI ID:: 1850840

Alternate ID(s):: OSTI ID: 1657316

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 982, Issue C; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (13)

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