On-ground calibration of low gain response for Gamma-Ray Detectors onboard the GECAM satellite

IF 2.7 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Experimental Astronomy Pub Date : 2023-07-07 DOI:10.1007/s10686-023-09892-x

Chaoyang Li, Wenxi Peng, Yaqing Liu, Xingzhu Cui, Zhenghua An, Xinqiao Li, Shaolin Xiong, Dali Zhang, Ke Gong, Min Gao, Dongya Guo, Xiaohua Liang, Xiaojing Liu, Rui Qiao, Xilei Sun, Jinzhou Wang, Xiangyang Wen, Yanbing Xu, Sheng Yang, Fan Zhang, Xiaoyun Zhao, Juncheng Liang, Haoran Liu, Zhijie Yang, Xiaofei Lan

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引用次数: 1

Abstract

The Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) consists of two small satellites operating in the same Earth orbit with opposite phases. Its scientific goal is to monitor the electromagnetic counterparts associated with Gravitational Wave events (GWE) and other cosmic high energy transient sources. As the main detector, the Gamma-Ray Detector (GRD) adopts LaBr\(_{3}\):Ce scintillator coupled with SiPM array. Each GRD has two output channels, i.e. high gain channel (8 \(\sim \) 250 keV) and low gain channel (50 \(\sim \) 6000 keV). In this paper, we present the low gain calibration results of GRDs with radioactive sources on ground, including the E-C relation, energy resolution, absolute detection efficiency and spatial response. Meanwhile, the consistency between the measurements and Geant4 simulation demonstrates the accuracy of the simulation code.

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GECAM卫星上伽玛射线探测器低增益响应的地面校准

引力波高能电磁对偶全天监测(GECAM)由两颗小卫星组成，它们以相反的相位在同一地球轨道上运行。它的科学目标是监测与引力波事件(GWE)和其他宇宙高能瞬态源相关的电磁对应物。伽玛射线探测器(GRD)采用LaBr \(_{3}\):Ce闪烁体与SiPM阵列耦合作为主探测器。每个GRD有两个输出通道，即高增益通道(8 \(\sim \) 250 keV)和低增益通道(50 \(\sim \) 6000 keV)。本文介绍了地面辐射源GRDs的低增益校准结果，包括E-C关系、能量分辨率、绝对探测效率和空间响应。同时，测量结果与Geant4仿真结果的一致性证明了仿真代码的准确性。

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来源期刊

Experimental Astronomy 地学天文-天文与天体物理

CiteScore

5.30

自引率

3.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Many new instruments for observing astronomical objects at a variety of wavelengths have been and are continually being developed. Furthermore, a vast amount of effort is being put into the development of new techniques for data analysis in order to cope with great streams of data collected by these instruments. Experimental Astronomy acts as a medium for the publication of papers of contemporary scientific interest on astrophysical instrumentation and methods necessary for the conduct of astronomy at all wavelength fields. Experimental Astronomy publishes full-length articles, research letters and reviews on developments in detection techniques, instruments, and data analysis and image processing techniques. Occasional special issues are published, giving an in-depth presentation of the instrumentation and/or analysis connected with specific projects, such as satellite experiments or ground-based telescopes, or of specialized techniques.