A Low-power Portable Digital Spectroscopy for CZT Gamma-ray Detector
A portable, low power, digital spectroscopy for CdZnTe (CZT) detector is designed and described in this paper. Its readout electronics is implemented with waveform sampling, Flash-based FPGA (Field Programmable Gate Array) and USB (universal serial bus) technique. The CZT detector, with an effective thickness of 3mm and a diameter of 5mm, is mounted on the same PCB board with high voltage supply module and low noise preamplifier. Current signal from CZT detector is integrated by a charge sensitive amplifier and then shaped by a CR-RC3 shaper. The shaped signal is sampled by a 12-bit ADC and then processed by an IGLOO Flash-based low power FPGA in a digital module. A USB interface is adopted both for low voltage and high voltage power supply, and communicating with a host computer, which results in a portable solution with maximum power consumption of about 450mW. In the host computer, a graphic user interface (GUI) software is developed based on Labwindows/CVI, for real-timely displaying the energy spectrum or waveform of shaping signal. Test results showed that the dynamic range of the spectroscopy can reach 240fC (equivalent to about 7 MeV energy deposition in CZT detector) and the intrinsic noise (in RMS) for the electronics is less than 0.3fC (equivalent to about 8.7 keV).
Spectroscopy CdZnTe (CZT) Universal Serial Bus (USB) Portable Low-power Field Programmable Gate Array (FPGA)
Qibin Zheng Changqing Feng Hang Su Danyang Zhu Shubin Liu Qi An
Modern Physics Department, University of Science and Technology of China;The State Key Laboratory of Particle Detection and Electronics, USTC
国际会议
重庆
英文
761-764
2015-12-18（万方平台首次上网日期，不代表论文的发表时间）