期刊
JOURNAL OF INSTRUMENTATION
卷 13, 期 -, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1748-0221/13/08/P08014
关键词
Gamma detectors (scintillators, CZT, HPG, HgI etc); Gamma telescopes; X-ray detectors
资金
- Key Research Program of Frontier Sciences, Chinese Academy of Sciences [QYZDB-SSW-SLH012]
- CAS Center for Excellence in Particle Physics (CCEPP)
- National Natural Science Foundation of China [11775252]
- Young Scientists Fund of the National Natural Science Foundation of China [11305194]
The Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) project is the planned Chinese space telescope for detecting the X-and gamma-ray. It consists of two micro-satellites in low earth orbit with the advantages of instantaneous full-sky coverage. Due to the limitation of size, weight and power consumption of micro-satellites, silicon photomultipliers (SiPMs) are used to replace the photomultiplier tubes (PMTs) to assemble a novel gamma-ray detector. A prototype of a SiPM array with LaBr3 crystal is built and tested, and it shows a high detection efficiency (70% at 5.9 keV) and an acceptable uniformity. The low energy X-ray of 5.9 keV can be detected by single channel readout circuit, and the energy resolution are 125% (FWHM) at 5.9 keV, 6.5% at 662 keV and 3.5% at 1332 keV. The design and the performance of the detector are discussed in this paper.
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