The technology for detection of gamma-ray burst with GECAM satellite
The technology for detection of gamma-ray burst with GECAM satellite
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DOI：
10.1007/s41605-021-00288-z
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发表时间：
2021-11
影响因子：
0.6
通讯作者：
X. Li;X. Wen;Z. An;C. Cai;Z. Chang;G. Chen;C. Chen;Y. Du;M. Gao;R. Gao;K. Gong-K.
中科院分区：
文献类型：
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作者：
X. Li;X. Wen;Z. An;C. Cai;Z. Chang;G. Chen;C. Chen;Y. Du;M. Gao;R. Gao;K. Gong-K.
GECAM卫星的主要物理目标是探测与双致密天体合并引力波有关的伽玛射线暴。GECAM卫星还探测和调查各种高能天体的爆发。目的和方法在这项研究中，我们设计，开发和校准的有效载荷，并将其发射到轨道上的GECAM卫星。有效载荷由伽马射线探测器（GRD，用于探测4 keV-4 MeV X/γ射线）、带电粒子探测器（CPD，用于探测150 keV-5 MeV带电粒子）和电子盒（EBOX）组成。全天场覆盖是通过两颗相距180度、位于地理中心两侧的229度大区域卫星实现的。每颗卫星配备25个GRD和8个CPD;因此，卫星可以识别太空中的带电粒子爆发。γ射线探测器采用溴化镧晶体技术结合硅光电倍增管。结论GECAM卫星可以通过索引和拟合方法快速确定伽玛暴的方向（定位），而伽玛暴的发射变率、能谱和方向可以通过北斗三号RDSS准实时地指导后续观测。它将在高能天体爆发的研究中发挥重要作用。
IntroductionThe main physical objective of the GECAM satellite is to detect gamma-ray bursts, which is related to gravitational waves of double compact object mergers. The GECAM satellite also detects and investigates various bursts of high-energy celestial bodies.Purposes and methodsIn this study, we designed, developed and calibrated the payload and launched it into orbit with GECAM satellite. The payload consists of the gamma ray detector (GRD, for detecting 4 keV–4 MeV X/γ ray), the charged particle detector (CPD, for detecting 150 keV–5 MeV charged particle), and the electronic box (EBOX). The all-sky field coverage is achieved via two 229-degree large-area satellites positioned 180 degrees apart and are on opposite sides of the geo-center. Each satellite is equipped with 25 GRDs and 8 CPDs; thus, the satellite can identify charged particle bursts in space. Gamma-ray detectors adopt lanthanum bromide crystal technology combined with silicon photomultipliers. This is the first time that this technology was used massively in space detectors.ConclusionsThe GECAM satellite can quickly determine the direction of gamma-ray bursts (positioning) via indexing and fitting method, while the transmit variability, energy spectrum and direction of the gamma-ray bursts guide subsequent observations through the Beidou-3 RDSS in quasi-real time. It will play an important role in the study of high energy celestial bursts.