TY - JOUR
T1 - Development of a multi-detector readout circuitry for ultrahigh energy resolution single-photon imaging applications
AU - Zannoni, Elena Maria
AU - Wilson, Matthew D.
AU - Bolz, Krystian
AU - Goede, Mario
AU - Lauba, Frank
AU - Schöne, Daniel
AU - Zhang, Jiajin
AU - Veale, Matthew C.
AU - Verhoeven, Marcus
AU - Meng, Ling Jian
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/11/21
Y1 - 2020/11/21
N2 - In this paper, we present the design and preliminary performance evaluation of a novel external multi-channel readout circuitry for small-pixel room-temperature semiconductor detectors, namely CdZnTe (CZT) and CdTe, that provide an excellent intrinsic spatial (250 and 500μm pixel size) and an ultrahigh energy resolution (∼1% at 122 keV) for X-ray and gamma-ray imaging applications. An analog front-end printed circuit board (PCB) was designed and developed for data digitization, data transfer and ASIC control of pixelated CZT or CdTe detectors. Each detector unit is 2 cm × 2 cm in size and 1 or 2 mm in thickness, being bump-bonded onto a HEXITEC ASIC, and wire-bonded to a readout detector module PCB. The detectors’ front-end is then connected, through flexible cables of up to 10 m in length, to a remote data acquisition system that interfaces with a PC through USB3.0 connection. We present the design and performance of a prototype multi-channel readout system that can read out up to 24 detector modules synchronously. Our experimental results demonstrated that the readout circuitry offers an ultrahigh spectral resolution (0.8 keV at 60 keV and 1.05 keV at 122 keV) with the Cd(Zn)Te/HEXITEC ASIC modules tested. This architecture was designed to allow easy expansion to accommodate a larger number of detector modules, and the flexibility of arranging the detector modules in a large and deformable detector array without degrading the excellent energy resolution.
AB - In this paper, we present the design and preliminary performance evaluation of a novel external multi-channel readout circuitry for small-pixel room-temperature semiconductor detectors, namely CdZnTe (CZT) and CdTe, that provide an excellent intrinsic spatial (250 and 500μm pixel size) and an ultrahigh energy resolution (∼1% at 122 keV) for X-ray and gamma-ray imaging applications. An analog front-end printed circuit board (PCB) was designed and developed for data digitization, data transfer and ASIC control of pixelated CZT or CdTe detectors. Each detector unit is 2 cm × 2 cm in size and 1 or 2 mm in thickness, being bump-bonded onto a HEXITEC ASIC, and wire-bonded to a readout detector module PCB. The detectors’ front-end is then connected, through flexible cables of up to 10 m in length, to a remote data acquisition system that interfaces with a PC through USB3.0 connection. We present the design and performance of a prototype multi-channel readout system that can read out up to 24 detector modules synchronously. Our experimental results demonstrated that the readout circuitry offers an ultrahigh spectral resolution (0.8 keV at 60 keV and 1.05 keV at 122 keV) with the Cd(Zn)Te/HEXITEC ASIC modules tested. This architecture was designed to allow easy expansion to accommodate a larger number of detector modules, and the flexibility of arranging the detector modules in a large and deformable detector array without degrading the excellent energy resolution.
KW - Analog front-end
KW - Cd(Zn)Te
KW - Gamma-ray Detector
KW - Multi-channel readout circuitry
KW - Room-temperature semiconductor detector
KW - Spectroscopic
UR - http://www.scopus.com/inward/record.url?scp=85089742275&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85089742275&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2020.164531
DO - 10.1016/j.nima.2020.164531
M3 - Article
C2 - 32968332
AN - SCOPUS:85089742275
SN - 0168-9002
VL - 981
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
M1 - 164531
ER -