Performance study of a large CsI(Tl) scintillator with an MPPC readout for nanosatellites used to localize gamma-ray bursts

Kento Torigoe, Yasushi Fukazawa, Gabór Galgóczi, Tsunefumi Mizuno, Kazuhiro Nakazawa, Masanori Ohno, András Pál, Hiromitsu Takahashi, Koji Tanaka, Norbert Tarcai, Nagomi Uchida, Norbert Werner, Teruaki Enoto, Zsolt Frei, Yuto Ichinohe, László Kiss, Hirokazu Odaka, Jakub Řípa, Zsolt Várhegyi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We are designing a fleet of nanosatellites to perform accurate position determinations of short-duration gamma-ray bursts by measuring arrival time differences. To achieve sufficient photon statistics to measure the arrival times precisely under the severe limitations of size, mass and power consumption, we propose the use of large-area CsI(Tl) scintillators which provide a high light output and the use of a small-sized multipixel photon counters (MPPC), a kind of SiPM, that have low power consumption. We plan to use one of the latest-model MPPCs provided by Hamamatsu Photonics, namely, S13360-6050CS, which has an active area of 6×6 mm 2 . We have compared the performance of two scintillators of different sizes (150×75×5 mm 3 and 100×75×5 mm 3 ); the bigger one is the maximum size that can be mounted on a three-unit satellite, according to CubeSat standards. We have found that the light yield of the bigger scintillator is lower than that of the smaller one, but the difference is only approximately 13%, and each has an energy threshold of ∼10 keV at 25 C. We have tested one- and two-MPPC readout and confirmed the same energy thresholds. The light yield for the two-MPPC readout is 1.4 times as high as that for the one-MPPC readout. We have also examined the position dependence of the light yield by using radiation from a 241 Am (59.5 keV) source, and confirmed that uniformity was improved, and energy resolution got better by ∼7% for two-MPPC readout.

Original languageEnglish
Pages (from-to)316-320
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume924
DOIs
Publication statusPublished - Apr 21 2019

    Fingerprint

Keywords

  • CsI scintillator
  • GRBs
  • MPPC

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

Torigoe, K., Fukazawa, Y., Galgóczi, G., Mizuno, T., Nakazawa, K., Ohno, M., Pál, A., Takahashi, H., Tanaka, K., Tarcai, N., Uchida, N., Werner, N., Enoto, T., Frei, Z., Ichinohe, Y., Kiss, L., Odaka, H., Řípa, J., & Várhegyi, Z. (2019). Performance study of a large CsI(Tl) scintillator with an MPPC readout for nanosatellites used to localize gamma-ray bursts. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 924, 316-320. https://doi.org/10.1016/j.nima.2018.08.039