Managing radiation degradation of CCDs on the Chandra x-ray Observatory -: III

被引：10

作者：

O'Dell, Stephen L. ^{[1
]}

Aldcroft, Thomas L. ^{[2
]}

Blackwell, William C. ^{[3
]}

Bucher, Sabina L. ^{[4
]}

Chappell, Jon H. ^{[2
]}

DePasquale, Joseph M. ^{[2
]}

Grant, Catherine E. ^{[5
]}

Juda, Michael ^{[2
]}

Martin, Eric R. ^{[3
]}

Minow, Joseph I. ^{[6
]}

Murray, Stephen S. ^{[2
]}

Plucinsky, Paul P. ^{[2
]}

Schwartz, Daniel A. ^{[2
]}

Shropshire, Daniel P. ^{[3
]}

Spitzbart, Bradley J. ^{[2
]}

Viens, Paul R. ^{[3
]}

Wolk, Scott J. ^{[2
]}

机构：

[1] NASA, Marshall Space Flight Ctr, NSSTC VP62,320 Sparkman Dr, Huntsville, AL 35805 USA

[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[3] Jacobs Sverdrup, Sverdrup MSFC, Huntsville, AL 35812 USA

[4] Northrop Grumman Space Technol, Cambridge, MA 02138 USA

[5] MIT, Ctr Space Res, Cambridge, MA 02139 USA

[6] NASA, Marshall Space Flight Ctr, Huntsville, AL 35812 USA

来源：

UV, X-RAY, AND GAMMA-RAY SPACE INSTRUMENTATION FOR ASTRONOMY XV | 2007年 / 6686卷

关键词：

X-ray astronomy; CCDs; radiation damage; radiation environment; spacecraft operations;

D O I：

10.1117/12.734594

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Soon after the start of science operations of the Chandra X-ray Observatory, it became apparent that weakly penetrating (0.1-0.5 MeV) protons in the Earth's radiation belt were causing an unexpectedly rapid increase in the charge-transfer inefficiency of Chandra's front-illuminated CCDs. Fortunately, the Chandra team developed, implemented, and maintains a radiation-protection program that successfully reduced the rate of degradation of the CCDs' performance to acceptable levels. Since implementing this program, the average rate of increase of the charge-transfer inefficiency has slowed to 3.2x10(-6)/y (2.3%/y) for the front-illuminated CCDs and 1.0x10(-6)/y (5.8%/y) for the back-illuminated CCDs. This paper reviews the Chandra radiation-management program, reports the current status, and describes changes planned or implemented since the previous paper on this topic.

引用

页数：12

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