用于中子能谱测量的反冲质子磁谱仪  

Magnetic proton recoil spectrometer for neutron spectrum measurements

作　　者：唐琦[1] 陈家斌[1] 宋仔峰[1] 詹夏宇[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《强激光与粒子束》2012年第12期2831-2836,共6页High Power Laser and Particle Beams

摘　　要：根据神光-Ⅲ原型内爆实验条件下初级中子能谱诊断的要求,提出了反冲质子磁谱仪原型的设计方案,并通过蒙特卡罗程序Geant4对设计方案进行了仿真模拟。该质谱仪的测量能区在6～30MeV,测量产额范围大于1012,能够测量内爆实验的全中子能谱。模拟结果表明:设计的谱仪对于14MeV的中子探测效率大于10-11,能量分辨达到1%,信噪比大于10,满足神光-Ⅲ原型装置内爆实验离子温度诊断的要求。According to the requirement of implosions at the Shengguang Ⅲ facility and its prototype, the design of a magnetic proton recoil spectrometer was illuminated, and it was simulated by the Monte-Carlo code Geant4. Neutron spectra in the range of 6-30 MeV can be measured by the spectrometer, and it is sensitive when neutron yield is larger than 10-2. The whole neutron spectrum produced in implosions can be measured with the spectrometer. Simulation results show that the detection effi eiency of the spectrometer is bigger than 10^-1 in measuring 14 MeV neutrons with an energy resolution of about 1%, and the sig- nal-to-background ratio of the spectrometer is larger than 10. The spectrometer can be used to diagnose ion temperature of DT fu el at the Shengguang -Ⅲ facility prototype.

关 键 词：惯性约束聚变 核诊断技术 中子能谱 磁谱仪 

分 类 号：TL816.3[核科学技术—核技术及应用] TL816.1