NDLI: The research on neutron dose equivalent meter for pulse neutron radiation field

Content Provider	IEEE Xplore Digital Library
Author	Weizhen Wang, Kejun Kang, Jianmin Li,
Copyright Year	2008
Description	Author affiliation: Key Laboratory of Particle and Radiation Imaging of Ministry of Education, Department of Engineering Physics, Tsinghua University, Beijing 100084, China (Weizhen Wang,; Kejun Kang,; Jianmin Li,)
Abstract	This paper introduces a new type of real-time neutron dosimeter that can reduce the counting loss of a general neutron dosimeter in a pulsed neutron field or strong neutron field, such as in the area of high-energy physics equipment, accelerator, and light source. In a general neutron dosimeter, signal is transmitted from the BF3 proportional counter tube, via the charge-sensitive pre-amplifier, the main amplifier, and the discriminator that filtering γ background and noise, and finally to the counter, and the counting will be converted to Sv or Sv/h. Based on general neutron dosimeter, by using the proportional relationship of the electric charge and the energy loss of the particle in the tube, when several neutrons are recorded simultaneously, the amplitude of the output impulse rises. Several Regions of Interest (ROIs) can be set in the pulse amplitude spectrum measured by multi-channel pulse amplitude analyzer (MCA) for one-neutron pulse, two-neutron-overlapping pulse and three-neutron-overlapping pulse. By individually integrating the count in these ROIs and multiplying with proper coefficient, the actual neutron influence can be obtained. The influence represents the neutron dose equivalent. The pulse amplitude spectrum obtained by multi-channel analyzer (MCA) in a pulsed neutron field shows that the peaks in the spectrum correspond to the energy of one neutron reaction, and two or three neutrons reacting simultaneously. The ROIs are set according to corresponding peaks. The experiment shows that the method can reduce the counting loss of a neutron dosimeter in a strong neutron field.
Starting Page	2339
Ending Page	2345
File Size	4071567
Page Count	7
File Format	PDF
ISBN	9781424427147
ISSN	10957863
DOI	10.1109/NSSMIC.2008.4774826
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-19
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Neutrons Pulse measurements Radiation detectors Pulse amplifiers Physics Light sources Silver Nuclear and plasma sciences Filtering Background noise
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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