【摘要】 空间硬X射线调制望远镜(HXMT)的性能与探测器的总灵敏面积紧密相关．利用蒙特卡罗工具对仪器的本底和点扩展函数进行计算分析,提出了一种优化的准直器构造方案,能减少探测单元总质量80多千克,相当于至少5套新探测单元质量．在同样的卫星载荷质量限制下,新方案可以增加探测单元,达到增大总探测灵敏面积,提升HXMT灵敏度和角分辨率等性能的目的．更多还原

【Abstract】 The performance of the Hard X-ray Modulation Telescope (HXMT) is significantly influenced by the col- lecting area.Based on the simulations of the background and the point spread function of the instrument,we propose a new collimator scheme in which the weight of the whole detectors can be decreased about 80kg.This is equal to the weight of 5 or more new detectors.We hope this new scheme will help to increase the number of detectors under the total loading mass limit,so that the collecting area will be larger and the performance of HXMT will be better.更多还原