A low-energy sensitive compact gamma-ray detector based on LaBr3 and SiPM for GECAM
arXiv:1803.07803 · doi:10.1088/1748-0221/13/08/P08014
Abstract
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 counterpart. It consists of two micro-satellites in low earth orbit with the advantages of instantaneous full-sky coverage, low energy threshold down to 6 keV and can be achieved within a short period and small budget. 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 a simply readout circuit, and the energy resolution is 6.5% (FWHM) at 662 keV. The design and performance of the detector are discussed in detail in this paper.
arXiv comment9 pages, 10 figures, accepteded by JINST
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- Pulsar and Magnetar Navigation with Fermi/GBM and GECAM
- Are binary black hole mergers and long gamma-ray bursts drawn from the same black hole population?
- Design and Performance of a Universal SiPM Readout System for X- and Gamma-Ray Missions
- Electric charge estimation using a SensL SiPM