GRM在轨标定探测器的设计和实现

Design and Implementation of In-orbit Calibration Detector of GRM

摘要: 伽马射线监视器（GRM）上搭载的在轨标定探测器（GCD）用于在轨探头的增益控制，对于探测器在轨探测性能的研究具有重要意义。本文对其各部分电子学的原理设计、偏压补偿电路的高低温实验验证及结果分析、投产加工及镶嵌源灌封设计等研制过程进行了描述，对设计中出现的问题加以验证及改进。实验和测试结果表明，探测器的功能正确，且探测效率、峰位漂移变化等性能指标均满足任务要求，从而表明该设计可保证GCD在轨功能的可靠实现。

Abstract: The gamma ray monitor (GRM) calibration detector (GCD) on board GRM is used to adjust the gain of main detector in orbit, which is of great significance for the study of detection performance of GRM. The principle design of each electronic part, the high and low temperature experimental verification and result analysis for bias compensating circuit, the production process and the embedment design of inlaid radioactive source were described in detail. Problems occurring in the design were verified and improved. The experiment and test results show that GCD’s function is correct, and the detection efficiency, peak position drift and other performance indicators of GCD meet the requirement of GRM mission, which indicates that the design can guarantee the reliable realization of GCD’s functions in orbit.