硬X射线成像望远镜系统初步研究  

A Preliminary Research on the Development of the Hard X-Ray Imaging Telescope

作　　者：郑春晓[1,2,3] 蔡明生[1,2] 胡一鸣[1,2] 黄永益[1,2] 宫一忠[1,2] 

机构地区：[1]中国科学院紫金山天文台,南京210008 [2]中国科学院暗物质与空间天文重点实验室,南京210008 [3]中国科学院大学,北京100049

出　　处：《天文学报》2014年第2期154-169,共16页Acta Astronomica Sinica

基　　金：国家自然科学基金项目(10973046)资助

摘　　要：介绍了基于傅立叶变换成像技术的硬X射线成像望远镜,利用双层平行光栅对天体X射线源发出的光进行调制编码,调制后的光由闪烁晶体探测器捕捉并进行光电转换,最后由电子学系统读出.调制准直器型望远镜分为空间调制和时间调制两种类型,时间调制系统要求探测器系统的扫描运动,而空间调制系统不需要运动.对光栅制作工艺进行了研究,给出了准直器的基本结构设计,成功制作了空间调制方式硬X射线成像望远镜原型机所需的关键部件,包括8个碘化铯晶体的探测器模块(含光电倍增管PMT)、8通道成型放大器(其中两套为实验备份)和数据获取系统.对这些部件的设计作了介绍,并给出了电子学系统的测试结果.Since the 1860s, astronomers have explored a new field with the discovery of X-ray. Instead of the conventional imaging technique by using mirrors or lens, which can not work in the high-energy bands, direct imaging, coded aperture, and Fourier transform are used for the high-energy imaging. It can be implemented in various hardware config- urations, among which the spatial modulation collimator are widely used. We adopt the grating collimator based on Fourier transform that is discussed in detail. This paper makes an investigation on the fabrication process of grating. The key components of the hard X- ray telescope based on the spatial modulation are developed, which contains 8 CsI-detector modules, 8-channel shaping amplifiers, and data acquisition system. The preliminary test results of readout electronics system are obtained.

关 键 词：仪器 探测器 仪器 其他诸多方面 望远镜 太阳 X射线 Γ射线 方法 统计 技术 光谱 

分 类 号：P111[天文地球—天文学]