Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.9815t&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #98.15; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
The Supernova Acceleration Probe (SNAP) mission will employ a unique charge-coupled device (CCD) for imaging at wavelengths from 350 1000 nm. These thick, fully-depleted p-channel CCDs developed at LBNL have three advantages over traditional thin n-channel CCDs. They have much higher quantum efficiency in the near-infrared, they are much more radiation tolerant, and the point spread function (PSF) can be controlled through application of the bias voltage and made very small. Recent results obtained on the irradiation of CCDs designed for SNAP will be presented showing the charge transfer efficiency (CTE), the dark current and its decay with time, and the observed number of "hot pixels," all as a function of the delivered proton fluence. Results on SNAP CCDs irradiated in a dewar at 140K while fully powered will also be presented. Comparisons will be made to the CTE degradation of n-channel CCDs used in previous space missions.
SNAP Collaboration
Takasaki Koki
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