ASIC With Multiple Energy Discrimination for High-Rate Photon Counting Applications |
| |
Authors: | De Geronimo G. Dragone A. Grosholz J. O'Connor P. Vernon E. |
| |
Affiliation: | Instrum. Div., Brookhaven Nat. Lab., Upton, NY; |
| |
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 |
| |
Keywords: | |
|
|