Improved Spatial Resolution in Thick, Fully-Depleted CCDs withEnhanced Red Sensitivity [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 2006.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators:: United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

The point spread function (PSF) is an important measure of spatial resolution in CCDs for point-like objects, since it affects image quality and spectroscopic resolution. We present new data and theoretical developments for lateral charge diffusion in thick, fully-depleted charge-coupled devices (CCDs) developed at Lawrence Berkeley National Laboratory (LBNL). Because they can be over-depleted, the LBNL devices have no field-free region and diffusion is controlled through the application of an external bias voltage. We give results for a 3512 x 3512 format, 10.5 {micro}m pixel back-illuminated p-channel CCD developed for the SuperNova/Acceleration Probe (SNAP), a proposed satellite-based experiment designed to study dark energy. The PSF was measured at substrate bias voltages between 3 V and 115 V. At a bias voltage of 115 V, we measure an rms diffusion of 3.7 ± 0.2 {micro}m. Lateral charge diffusion in LBNL CCDs will meet the SNAP requirements.

Report Numbers:

E 1.99:lbnl--59107-jart
lbnl--59107-jart

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Published through SciTech Connect.
03/09/2006.
"lbnl--59107-jart"
": KA1503020"
IEEE Transactions on Nuclear Science 2 ISSN 0018-9499; IETNAE FT
Kolbe,William F.; Holland, Stephen E.; Lorenzon, Wolfgang; Groom, Donald E.; Karcher, Armin; Roe, Natalie A.; Bebek, Christopher J.; Bailey, Stephen J.; Fairfield, Jessamyn A.
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)

Funding Information:

DE-AC02-05CH11231
PA1520

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