位移损伤对LOFT卫星硅漂移探测器电荷收集效率的影响
The effect of the displacement damage on the Charge Collection Efficiency in Silicon Drift Detectors for the LOFT satellite
摘要：
硅漂移探测器（SDD）技术已被选定用于大型X射线定时观测站（LOFT）空间飞行任务上的两个仪器。LOFT作为欧洲航天局“2015 - 2025年宇宙愿景”长期科学计划中M3发射机会的候选者，经历了为期三年的评估阶段。在LOFT评估阶段，我们研究了被困在地球磁层中的质子在SDD中产生的位移损伤。在以前的文章中，我们讨论了质子的非电离能损失对SDD漏电流的影响。本文测量了质子引起的位移损伤引起的电荷收集效率的变化，并与轨道上预期的损伤进行了比较。
英文摘要：
The technology of Silicon Drift Detectors (SDDs) has been selected for the two instruments aboard the Large Observatory For X-ray Timing (LOFT) space mission. LOFT underwent a three year long assessment phase as candidate for the M3 launch opportunity within the "Cosmic Vision 2015 -- 2025" long-term science plan of the European Space Agency. During the LOFT assessment phase, we studied the displacement damage produced in the SDDs by the protons trapped in the Earth's magnetosphere. In a previous paper we discussed the effects of the Non Ionising Energy Losses from protons on the SDD leakage current. In this paper we report the measurement of the variation of Charge Collection Efficiency produced by displacement damage caused by protons and the comparison with the expected damage in orbit.
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