| Autor: |
Feng, Pei-Yi, An, Zheng-Hua, Zhang, Da-Li, Wang, Chen-Wei, Zheng, Chao, Yang, Sheng, Xiong, Shao-Lin, Liu, Jia-Cong, Li, Xin-Qiao, Gong, Ke, Liu, Xiao-Jing, Gao, Min, Wen, Xiang-Yang, Liu, Ya-Qing, Zhao, Xiao-Yun, Zhang, Fan, Sun, Xi-Lei, Lu, Hong |
| Zdroj: |
SCIENCE CHINA Physics, Mechanics & Astronomy; Nov2024, Vol. 67 Issue 11, p1-16, 16p |
| Abstrakt: |
The Gamma-ray Transient Monitor (GTM) is an all-sky monitor onboard the Distant Retrograde Orbit-A (DRO-A) satellite with the scientific objective of detecting gamma-ray transients ranging from 20 keV to 1 MeV. The GTM was equipped with five Gamma-ray Transient Probe (GTP) detector modules utilizing a NaI(Tl) scintillator coupled with a SiPM array. To reduce the SiPM noise, GTP uses a dedicated dual-channel coincident readout design. In this work, we first studied the impact of different coincidence times on the detection efficiency and ultimately selected a 0.5 µs time coincidence window for offline data processing. To test the performance of the GTPs and validate the Monte-Carlo-simulated energy response, we conducted comprehensive ground calibration tests using the Hard X-ray Calibration Facility (HXCF) and radioactive sources, including the energy response, detection efficiency, spatial response, bias-voltage response, and temperature dependence. We extensively present the ground calibration results and validate the design and mass model of the GTP detector, thus providing the foundation for in-flight observations and scientific data analysis. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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