9-15 June 2018
Woodlands Conference Center
America/New_York timezone
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Nuclear Pulse Charge Measurement with a Method of Time over Linear Threshold

14 Jun 2018, 14:35
1h 30m
Woodlands Conference Center

Woodlands Conference Center

159 Visitor Center Dr, Williamsburg, VA 23185
Poster presentation Front End Electronics and Fast Digitizers Poster 2

Speakers

Mr Zhengqi Song (University of Science and Technology of China)Prof. Yonggang Wang (University of Science and Technology of China)Mr Qiang Cao (University of Science and Technology of China)

Description

Time over dynamic threshold (TODT) method, proposed in our previous work, has been successfully used for nuclear pulse charge measurement in PET detectors. It has advantages of strict linearity, large dynamic range, and better energy resolution, but requires a relatively complex circuit to generate specific dynamic threshold. In this paper, we propose to replace the dynamic threshold by a simpler linearly increasing threshold (called as TOLT method) with the aim to simplify the threshold generation circuit meanwhile maintaining its high energy resolution. Mathematical analysis on this replacement and the related realization circuit are presented. By energy spectrum measurement of PET detectors, the method is evaluated. The energy resolutions of PET detectors, composed of a PMT coupled with LYSO and LaBr3 crystal, are measured as 12.54% and 5.18% respectively, which is equivalent to the result obtained by TODT method. The test results show that the TOLT method is more practicable for charge measurement of nuclear detectors.

Institute USTC
Speaker Zhengqi Song
Minioral Yes
Country China
Description Analog Method

Primary author

Mr Zhengqi Song (University of Science and Technology of China)

Co-authors

Prof. Yonggang Wang (University of Science and Technology of China) Mr Qiang Cao (University of Science and Technology of China) Mr Yong Xiao (University of Science and Technology of China)

Presentation Materials