Share Email Print
cover

Proceedings Paper

Managing radiation degradation of CCDs on the Chandra X-ray Observatory III
Author(s): Stephen L. O'Dell; Thomas L. Aldcroft; William C. Blackwell; Sabina L. Bucher; Jon H. Chappell; Joseph M. DePasquale; Catherine E. Grant; Michael Juda; Eric R. Martin; Joseph I. Minow; Stephen S. Murray; Paul P. Plucinsky; Daniel A. Schwartz; Daniel P. Shropshire; Bradley J. Spitzbart; Paul R. Viens; Scott J. Wolk
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

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 3.2×10-6/y (2.3%/y) for the front-illuminated CCDs and 1.0×10-6/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.

Paper Details

Date Published: 18 September 2007
PDF: 12 pages
Proc. SPIE 6686, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XV, 668603 (18 September 2007); doi: 10.1117/12.734594
Show Author Affiliations
Stephen L. O'Dell, NASA Marshall Space Flight Ctr. (United States)
Thomas L. Aldcroft, Harvard-Smithsonian Ctr. for Astrophysics (United States)
William C. Blackwell, Jacobs Sverdrup (United States)
Sabina L. Bucher, Northrop Grumman Space Technology (United States)
Jon H. Chappell, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Joseph M. DePasquale, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Catherine E. Grant, Massachusetts Institute of Technology (United States)
Michael Juda, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Eric R. Martin, Jacobs Sverdrup (United States)
Joseph I. Minow, NASA Marshall Space Flight Ctr. (United States)
Stephen S. Murray, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Paul P. Plucinsky, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Daniel A. Schwartz, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Daniel P. Shropshire, Jacobs Sverdrup (United States)
Bradley J. Spitzbart, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Paul R. Viens, Jacobs Sverdrup (United States)
Scott J. Wolk, Harvard-Smithsonian Ctr. for Astrophysics (United States)


Published in SPIE Proceedings Vol. 6686:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XV
Oswald H.W. Siegmund, Editor(s)

© SPIE. Terms of Use
Back to Top