Radiation damage to charge coupled devices in the space environment

被引:98
作者
Yamashita, A
Dotani, T
Bautz, M
Crew, G
Ezuka, H
Gendreau, K
Kotani, T
Mitsuda, K
Otani, C
Rasmussen, A
Ricker, G
Tsunemi, H
机构
[1] MIT,CAMBRIDGE,MA 02139
[2] NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771
[3] INST PHYS & CHEM RES,WAKO,SAITAMA 35101,JAPAN
[4] COLUMBIA UNIV,NEW YORK,NY 10027
[5] OSAKA UNIV,TOYONAKA,OSAKA 560,JAPAN
关键词
ASCA; SATELLITE; CCDS;
D O I
10.1109/23.603763
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We have investigated the characteristics of radiation damage to charge coupled devices (CCDs) in the space environment. The X-ray astronomy satellite ASCA launched on February 20, 1993 in low Earth orbit carries CCDs specially developed for soft X-ray detection. We have traced the performance of the CCDs for 3 years. We have observed both the gradual decrease of charge transfer efficiency (CTE) and the increase of dark current. These are phenomenologically explained by the increase of charge traps due to irradiation by high energy charged particles. However, some of the effects of the radiation damage in the CCD are quite non-uniform over the chip on various scales. We discuss characteristics of the charge traps and possible origins of the non-uniformity.
引用
收藏
页码:847 / 853
页数:7
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