CTI Evolution and its Impact on Spectral Resolution in Different Orbital Environments

Details CTI Evolution and its Impact on Spectral Resolution in Different Orbital Environments CTI Evolution and its Impact on Spectral Resolution in Different Orbital Environments

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.3605g&link_type=abstract

American Astronomical Society, HEAD meeting #12, #36.05

Astronomy and Astrophysics

Astronomy

Scientific paper

The Chandra X-ray Observatory and Japan's Suzaku observatory both use CCD cameras for imaging spectroscopy of the X-ray sky. The CCDs themselves are similar in design, being fabricated at MIT's Lincoln Laboratory, but are operated under different conditions and in different orbital environments. We discuss the evolution of charge transfer inefficiency (CTI), a measure of radiation damage, and its impact on spectral resolution with particular emphasis on the effect of operational differences, such as focal plane temperature, and particle environments in low- and high-Earth orbit. We also discuss the efficacy of the charge injection capability of the Suzaku XIS detector in reducing both the absolute CTI and the rate of CTI increase.

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