期刊
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
卷 70, 期 3, 页码 1133-1146出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCSI.2022.3199484
关键词
Detectors; Photonics; Energy resolution; Energy measurement; Scintillators; Codes; Pulse measurements; Gamma spectroscopy; silicon photomultiplier (SiPM); charge amplifier; pulse processing; programmable; data converters; non-linear systems; feature-aware sensing
This paper presents a highly reconfigurable gamma spectrometer with a silicon photomultiplier detector and a custom integrated circuit-based multi-channel analyzer. The proposed architecture allows pulse-height analysis across the full dynamic range with adjustable analog gain and ADC resolution. The system can be tuned for different scintillator materials used in the detector.
A highly reconfigurable gamma spectrometer with a silicon photomultiplier detector and a custom integrated circuit (IC)-based multi-channel analyzer (MCA) is presented. The core of the MCA comprises a custom analog front-end IC and a piecewise-linear analog-to-digital converter (ADC) IC, both fabricated in a 180 nm complementary metal-oxide-semiconductor (CMOS) process. Along with a field-programmable gate array (FPGA)-based digital back-end, the proposed architecture allows pulse-height analysis with reconfigurable analog gain and ADC resolution across the full dynamic range. Specifically, the piecewise-linear ADC can increase resolution in selected regions of interest while utilizing a fixed 7-bit digital word, thus enabling data reduction and spectrum feature enhancement. Reconfigurability also allows the MCA to be tuned for different scintillator materials used in the detector. The system architecture is introduced at a conceptual level, followed by detector and circuit-level MCA implementation details and design trade-offs. Several isotope spectra were recorded with two common scintillators, LYSO and CsI(Tl), spanning energy peaks from 32 keV to 1.33 MeV. Variable energy bin-widths were measured across different AFE gains, ranging from 3 keV to 58 keV for LYSO, and 1.4 keV to 51 keV for CsI(Tl), demonstrating the versatility of the proposed system and its ability to provide reconfigurable peak enhancement for radiation spectroscopy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据