基于闪烁体探测器的稠密等离子体焦点装置脉冲中子测量  

Pulse neutron measurement of dense plasma focus device based on scintillation detector

作　　者：郭兆言 高泰 肖金水[1] 陶明锐 李洪涛[1] 马勋[1] Guo Zhaoyan;Gao Tai;Xiao Jinshui;Tao Mingrui;Li Hongtao;Ma Xun(Institute of Fluid Physics,CAEP,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》2025年第4期121-126,共6页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(12405352)。

摘　　要：研制了用于稠密等离子体焦点(DPF)装置中子产额和时间分布监测的闪烁体探测器,通过仿真模拟闪烁体透出光子随厚度的变化曲线确定闪烁体的尺寸参数,并采用相对标定获得该探测器的中子探测灵敏度。根据Monte-Carlo方法模拟了实验环境下的中子散射分布,并根据探头的线性范围等因素设计实验布局。利用研制的闪烁体探测器对自研的DPF装置的D-D脉冲中子产额和时间波形进行了测量,并对测量结果进行了分析和讨论。测试结果表明:设计的闪烁体探测器测试获得DPF装置产生的硬X射线及中子波形,两者峰值信号时间差与2.45 MeV中子飞行时间相当,中子脉宽约百纳秒。A scintillator detector for monitoring dense plasma focus(DPF)device neutron yield and waveform was developed.The size parameters of the scintillator were determined by simulating the curve of the variation of the photons emitted by the scintillator with the thickness,and the sensitivity of the detector was obtained by relative calibration.The scattering distribution in the experimental environment was simulated according to the Monte-Carlo method,and the experimental layout was designed according to factors such as the linear range of the probe.The D-D pulse neutron yield and time waveform of the self-developed DPF device were measured using the developed scintillator detector,and the measurement results were analyzed and discussed.The test results indicate that the scintillation detector has detected the hard X-rays and neutron waveforms generated by the DPF device.The time difference between their peak signals matches the flight time of 2.45 MeV neutrons,with a neutron pulse width of about hundreds of nanoseconds.

关 键 词：稠密等离子体焦点 塑料闪烁体探测器 中子飞行时间 中子产额 灵敏度 

分 类 号：O871.53[理学] TL814[核科学技术—核技术及应用]