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Flexible and low-cost FPGA-based multichannel analyzer for handheld measurement devices

Cao, V.H. and Dinh, T.H. and Nguyen, T.T. and Nguyen, K.H. and Pham, D.K. and Nguyen, X.H. and Nguyen, N.A. and Nguyen, T.-A. (2021) Flexible and low-cost FPGA-based multichannel analyzer for handheld measurement devices. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1018: 165808. ISSN 1689002

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Abstract

This study proposes a flexible, low-cost digital multichannel analyzer (DMCA) based on a field-programmable gate array (FPGA). Digital signal processing modules, including a digital Sallen-Key filter, an energy reconstruction (trapezoidal) filter, a baseline restorer, a timing trigger, and a pulse pile-up rejector, are implemented on FPGA. The proposed DMCA is coupled directly to the detector pre-amplifier without any analog signal conditioning circuit for a simple, compact, and cost-effective hardware design. The parameters of the filtering modules were optimized using MATLAB/Simulink and pulse data digitized using a high-speed analog-to-digital converter. The proposed DMCA also includes a digital gain compensation module to stabilize measured gamma spectra against temperature variation. In addition, software with a user-friendly graphical user interface has been developed for gamma spectrum acquisition and analysis. This prototype DMCA is highly promising for developing handheld radiation measurement devices in terms of performance, cost, and size. © 2021

Item Type: Article
Divisions: Faculties > Faculty of Physical and Chemical Engineering
Identification Number: 10.1016/j.nima.2021.165808
Uncontrolled Keywords: Analog to digital conversion; Cost effectiveness; Costs; Digital devices; Digital signal processing; Graphical user interfaces; Logic gates; MATLAB; Piles; Signal receivers; Cost fields; Digital multichannel analyzer; Energy reconstruction; Gamma spectrum; Handhelds; Low-costs; Measurement device; Multichannel analyzers; Processing modules; Sallen-Key filters; Field programmable gate arrays (FPGA)
Additional Information: Language of original document: English.
URI: http://eprints.lqdtu.edu.vn/id/eprint/8566

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