ASIC With Multiple Energy Discrimination for High-Rate Photon Counting Applications |
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| Authors: | De Geronimo G Dragone A Grosholz J O'Connor P Vernon E |
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| Affiliation: | Instrum. Div., Brookhaven Nat. Lab., Upton, NY; |
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| Abstract: | An ASIC for high rate photon counting measurements with multiple energy discrimination is presented. Optimized for pixelated CdZnTe sensors, the ASIC is composed of 64 channels with low-noise charge preamplification, high-order shaping (40 ns minimum peaking time), and five window-discriminators with associated 16-bit counters. An efficient readout scheme allows simultaneous measurement and readout through a 60 MHz 16-bit output bus. The ASIC architecture and experimental results are reported, and the impact of the shaper order on the resolution, ballistic deficit, and pile-up is discussed |
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