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

Volume

54

Issue

2

fYear

2007

fDate

4/1/2007 12:00:00 AM

Firstpage

303

Lastpage

312

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;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2007.892650

Filename

4155093