脉冲中子闪烁探测器的工程可靠性设计与提升  

Engineering reliability design and improvement for pulsed neutron scintillation detector

作　　者：马烈华[1] 陈爽 李洪涛[1] 彭旭升[1] 张波涛[1] 李波[1] 王城[1] 艾杰[1] Ma Liehua;Chen Shuang;Li Hongtao;Peng Xusheng;Zhang Botao;Li Bo;Wang Cheng;Ai Jie(Institute of Fluid Physics,CAEP,P.O.Box 919-120,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《强激光与粒子束》2023年第11期157-162,共6页High Power Laser and Particle Beams

摘　　要：针对一种在复杂环境条件下进行脉冲中子探测的闪烁探测器,开展了一系列的可靠性设计、保证工作。在设计上通过双通道冗余备份、抗振设计等方式提升了探测器的固有可靠性。此外还采取可靠性建模及指标分配的方式明确了探测器各部件的任务可靠性目标,通过FMECA分析方法研究了探测器各部件的故障模式及其影响,确定了可靠性重要部件。通过运用环境应力筛选试验及可靠性强化试验,进一步提升了探测器的可靠性。经初步验证,采取上述可靠性设计保障技术的脉冲中子探测器,其任务可靠度可达到99.9%以上。A series of reliability design work is carried out for a scintillation detector which can detect pulsed neutrons in complex environment.In the design,the inherent reliability of the detector is improved by means of redundant backup of test channels and anti-vibration design.The mission reliability objectives of each component of the detector are defined by means of reliability modeling and index assignment.Through FMECA analysis method,the failure modes and their effects of each component of the detector are studied,and the important component of reliability is determined.The reliability of the detector is further improved by using environmental stress screening test and reliability enhancement test.It is proved that the mission reliability of the pulsed neutron detector with the above reliability design assurance technology is not less than 0.999.

关 键 词：脉冲中子 闪烁探测器 可靠性 FMECA 

分 类 号：O59[理学—应用物理] V417.3[理学—物理]