1. Detection of Low-Energy X-rays Using YSO Scintillation Crystal Arrays for GRB Experiments
- Author
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Minbin Kim, Jakub Ripa, Il H. Park, Vitaly Bogomolov, Søren Brandt, Carl Budtz-Jørgensen, Alberto J. Castro-Tirado, Sheng-Hsiung Chang, Yenyun Chang, Chia Ray Chen, C.-W. Chen, Pisin Chen, Paul Connell, Chris Eyles, Georgii Gaikov, Gihan Hong, Jian Jung Huang, Ming-Huey Alfred Huang, Soomin Jeong, Jieun Kim, Jik Lee, Heuijin Lim, Chih-Yang Lin, Tsung-Che Liu, Jiwoo Nam, Mikhail Panasyuk, Vasily Petrov, Victor Reglero, Juana M. Rodrigo, Sergey Svertilov, Nikolay Vedenkin, Ming Zu Wang, and Ivan Yashin
- Subjects
gamma-ray burst ,YSO ,UBAT ,UFFO ,Elementary particle physics ,QC793-793.5 - Abstract
We developed an X-ray detector using 36 arrays, each consisting of a 64-pixellated yttrium oxyorthosilicate (YSO) scintillation crystal and a 64-channel multi-anode photomultiplier tube. The X-ray detector was designed to detect X-rays with energies lower than 10 keV, primarily with the aim of localizing gamma-ray bursts (GRBs). YSO crystals have no intrinsic background, which is advantageous for increasing low-energy sensitivity. The fabricated detector was integrated into UBAT, the payload of the Ultra-Fast Flash Observatory (UFFO)/Lomonosov for GRB observation. The UFFO was successfully operated in space in a low-Earth orbit. In this paper, we present the responses of the X-ray detector of the UBAT engineering model identical to the flight model, using 241Am and 55Fe radioactive sources and an Amptek X-ray tube. We found that the X-ray detector can measure energies lower than 5 keV. As such, we expect YSO crystals to be good candidates for the X-ray detector materials for future GRB missions.
- Published
- 2021
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