2003•NASA Technical Reports Server (NASA)Requires access
Characterization of a 2-mm thick, 16x16 Cadmium-Zinc-Telluride Pixel Array
Jessica A. Gaskin, G. Richardson, Shannon Mitchell, Brian D. Ramsey, Paul Seller, Dharma P. Sharma
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Abstract
The detector under study is a 2-mm-thick, 16x16 Cadmium-Zinc-Telluride pixel array with a pixel pitch of 300 microns and inter-pixel gap of 50 microns. This detector is a precursor to that which will be used at the focal plane of the High Energy Replicated Optics (HERO) telescope currently being developed at Marshall Space Flight Center. With a telescope focal length of 6 meters, the detector needs to have a spatial resolution of around 200 microns in order to take full advantage of the HERO angular resolution. We discuss to what degree charge sharing will degrade energy resolution but will improve our spatial resolution through position interpolation. In addition, we discuss electric field modeling for this specific detector geometry and the role this mapping will play in terms of charge sharing and charge loss in the detector.