Displacement damage in optocouplers induced by high energy neutrons at back-n in China Spallation Neutron Source

doi:10.1088/1674-1056/ab5efb

Abstract Neutron radiation experiments of optocouplers at back-streaming white neutrons (back-n) in China Spallation Neutron Source (CSNS) are presented. The displacement damages induced by neutron radiation are analyzed. The performance degradations of two types of optocouplers are compared. The degradations of current transfer ratio (CTR) are analyzed, and the mechanisms induced by radiation are also demonstrated. With the increase of the accumulated fluence, the CTR is degrading linearly with neutron fluence. The radiation hardening of optocouplers can be improved when the forward current is increased. Other parameters related to CTR degradation of optocouplers are also analyzed.

Keywords: China Spallation Neutron Source optocoupler neutron radiation displacement damage current transfer ratio

Received: 07 July 2019
Revised: 23 October 2019
Published: 05 January 2020

PACS:	42.88.+h	(Environmental and radiation effects on optical elements, devices, and systems)
	61.80.Hg	(Neutron radiation effects)
	52.59.-f	(Intense particle beams and radiation sources)
	61.80.-x	(Physical radiation effects, radiation damage)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11875223, 11805155, and 11690043), the Chinese Academy of Sciences Strategic Pilot Science and Technology Project (Grant No. XDA15015000), the Innovation Foundation of Radiation Application, China (Grant No. KFZC2018040201), and the Foundation of State Key Laboratory of China (Grant Nos. SKLIPR1803 and 1903Z).

Corresponding Authors: Zu-Jun Wang
E-mail: wangzujun@nint.ac.cn

Cite this article:

Rui Xu(徐瑞), Zu-Jun Wang(王祖军), Yuan-Yuan Xue(薛院院), Hao Ning(宁浩), Min-Bo Liu(刘敏波), Xiao-Qiang Guo(郭晓强), Zhi-Bin Yao(姚志斌), Jiang-Kun Sheng(盛江坤), Wu-Ying Ma(马武英), Guan-Tao Dong(董观涛) Displacement damage in optocouplers induced by high energy neutrons at back-n in China Spallation Neutron Source 2020 Chin. Phys. B 29 014210

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