Title :
ASIC With Multiple Energy Discrimination for High-Rate Photon Counting Applications
Author :
Geronimo, Gianluigi De ; Dragone, Angelo ; Grosholz, Joe ; Connor, Paul O. ; Vernon, Emerson
Author_Institution :
Instrum. Div., Brookhaven Nat. Lab., Upton, NY
fDate :
4/1/2007 12:00:00 AM
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 :
application specific integrated circuits; discriminators; integrated circuit design; photon counting; pulse shaping; readout electronics; sensors; 16-bit counters; 16-bit output bus; ASIC architecture; CdZnTe; ballistic deficit; high-order shaping; high-rate photon counting measurements; low-noise charge preamplification; multiple energy discrimination; pile-up; pixelated CdZnTe sensors; readout scheme; window-discriminators; Application specific integrated circuits; Capacitance; Detectors; Electrons; Energy measurement; Energy resolution; Fabrication; MOSFET circuits; Optoelectronic and photonic sensors; Photonic integrated circuits; ASIC; CdZnTe; high-rate; photon counting;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2007.892650
