用钱德拉X射线天文台的ACIS作为粒子辐射监测器
Using ACIS on the Chandra X-ray Observatory as a particle radiation monitor
摘要：
先进的CCD成像光谱仪（ACIS）是钱德拉X射线天文台的两个焦平面仪器之一。在最初的辐射带通过期间，暴露的ACIS遭受了被捕获的软质子从X射线望远镜的反射镜散射的严重辐射损伤。这种损坏的主要影响是增加了ACIS 8前照式CCD的电荷转移效率（CTI）。随后，钱德拉小组实施了在高辐射事件期间将货物预报信息系统从望远镜焦点上移开的程序：在辐射带过境期间的计划保护;由机载辐射监测器触发的自主保护;以及根据对空间气象条件的评估进行人工干预。然而，随着钱德拉的多层绝缘老化，高温降低了机载辐射监测器的有效性。在这里，我们调查使用ACIS CCD本身作为辐射监测器。我们探索了10年的数据库，以评估CCD的粒子辐射的响应，并比较这种响应与其他辐射数据和环境模型。
英文摘要：
The Advanced CCD Imaging Spectrometer (ACIS) is one of two focal-plane instruments on the Chandra X-ray Observatory. During initial radiation-belt passes, the exposed ACIS suffered significant radiation damage from trapped soft protons scattering off the x-ray telescope's mirrors. The primary effect of this damage was to increase the charge-transfer inefficiency (CTI) of the ACIS 8 front-illuminated CCDs. Subsequently, the Chandra team implemented procedures to remove the ACIS from the telescope's focus during high-radiation events: planned protection during radiation-belt transits; autonomous protection triggered by an on-board radiation monitor; and manual intervention based upon assessment of space-weather conditions. However, as Chandra's multilayer insulation ages, elevated temperatures have reduced the effectiveness of the on-board radiation monitor for autonomous protection. Here we investigate using the ACIS CCDs themselves as a radiation monitor. We explore the 10-year database to evaluate the CCDs' response to particle radiation and to compare this response with other radiation data and environment models.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
