A digital delay-line-shaping method for pulse shape discrimination in stilbene neutron detector and application to fusion neutron measurement at HL-2A tokamak

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 687; pp. 7 - 13
• Main Authors: Zhang, Xing, Yuan, Xi, Xie, Xufei, Chen, Zhongjing, Chen, Jinxiang, Fan, Tieshuan, Yuan, Guoliang, Yang, Jinwei, Yang, Qingwei
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 21.09.2012
• Subjects: Accelerators; Delay-line-shaping; Digital; Digital pulse shape discrimination; Discrimination; Fusion neutron diagnostics; Neutron detectors; Neutron sources; Pulse shape; Stilbene; Stilbene crystal detector; Tokamak devices; Fusion neutron diagnostics; Digital pulse shape discrimination; Stilbene crystal detector; Delay-line-shaping
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2012.05.077

A digital delay-line-shaping method for neutron/γ-ray pulse shape discrimination in a stilbene detector is developed and applied to the neutron measurements on HL-2A tokamak. The performance of the digital method is validated by measurements on an Am–Be neutron source. The method performs well over a wide energy range, the energy threshold can be as low as 500keV for neutrons and 180keV for γ-rays. The digital stilbene neutron detector was also used for measurements on the accelerator neutron sources. ► A digital delay-line-shaping method for neutron/γ-ray pulse shape discrimination is developed. ► An appropriate energy threshold is beneficial to improve the FOM value. ► The digitized stilbene detection system was applied to fusion neutron diagnostic on HL-2A tokamak.