Design of optimal digital filter and digital signal processing for a CdZnTe high resolution gamma-ray system. (August 2020)

• Record Type: Journal Article
• Authors: Kim, B.J.; Lee, K.B.; Lee, J.M.; Hwang, S.H.; Heo, D.H.; Han, K.H.
• Is Part Of: Applied radiation and isotopes. Volume 162(2020:Aug.)
• Publication Date: 2020-08
• Subjects: Digital signal processing -- FPGA -- Moving window deconvolution -- CdZnTe detector; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2020.109171
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: We have developed an online digital signal processing system based on an FPGA. The system consists of pile-up rejection, baseline restorer, peak detection and pole-zero cancellation for evaluation of deposited energy in the detector. The shaping algorithm employed is a Moving Window Deconvolution (MWD) to shape digitized data into a trapezoidal form. For the purpose of verification, the developed digital system was tested for 137 Cs gamma rays. The entire system is programmed using the LabVIEW environment. Highlights: An online digital signal processing system for radiation spectroscopy was developed. The Moving Window Deconvolution was adopted to shape digitized signal into a trapezoidal shape. All digital algorithms are programmed using the LabVIEW environment. The developed system was verified for gamma ray measurement with a CZT detector.