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30 December 2020 X-ray photon counting performance of front-illuminated scientific CMOS image sensor
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Abstract
We developed an X-ray imaging spectrometer with a high timing resolution. CMOS image sensors, widely used in optical imaging, have an excellent time resolution with considerably low readout noise. We performed experiments using a Zyla CMOS image sensor manufactured by Andor Technology pic. (UK). It employs a front illuminated(FI) scientific CMOS (sCMOS) with each pixel size of 6.5×6.5μm2. We found that nearly all X-ray events spread more than 5×5 pixels and obtained good energy resolution of 260 eV at 5.9 keV at room temperature. The spectrum shows no degradation at lower energy, which imply that there is negligibly small charge loss. We report photon counting performance for a broad range of X-rays from 3-25keV at room temperature.
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Junko S. Hiraga, Yasuaki Kamata, Daito Yuhi, Yukino Urabe, Akihiro Yoshida, and Hiroshi Nakajima "X-ray photon counting performance of front-illuminated scientific CMOS image sensor", Proc. SPIE 11454, X-Ray, Optical, and Infrared Detectors for Astronomy IX, 1145438 (30 December 2020); https://doi.org/10.1117/12.2562976
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