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The detection of X-rays is a unique process relative to other wavelengths, and allows for some novel features that increase the scientific yield of a single observation. Unlike lower photon energies, X-rays liberate a large number of electrons from the silicon absorber array of the detector. This number is usually on the order of several hundred to a thousand for moderate-energy X-rays. These electrons tend to diffuse outward into what is referred to as the electron cloud. This cloud can then be picked up by several pixels, forming a specific pattern based on the exact incident location. By conducting the first ever “mesh experiment” on a hybrid CMOS detector (HCD), we will experimentally determine the charge cloud shape and use it to characterize responsivity of the detector with subpixel spatial resolution
Evan Bray andDavid Burrows
"Preparation for a mesh experiment on a hybrid CMOS detector", Proc. SPIE 10397, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XX, 1039706 (29 August 2017); https://doi.org/10.1117/12.2273014
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Evan Bray, David Burrows, "Preparation for a mesh experiment on a hybrid CMOS detector," Proc. SPIE 10397, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XX, 1039706 (29 August 2017); https://doi.org/10.1117/12.2273014