论文部分内容阅读
核反应堆的安全运行、新一代反应堆设计以及核废料处理等需要精确的中子核数据。光中子源联用飞行时间谱(Time of Flight,TOF)测量是最精确的中子能量测量技术,在热中子和共振中子能区的截面测量中发挥了非常重要的作用。钍基熔盐堆(Thorium Molten Salt Reactor,TMSR)项目中15 MeV电子加速器驱动的光中子源装置(TMSR Photo-Neutron Source Phase 1,TPNS1)是专为钍-铀循环核数据测量设计和建造的,它位于中国科学院上海应用物理研究所嘉定园区内。第一阶段采用15 MeV电子直线加速器(LINAC)驱动,第二阶段拟建造电子能量约100 MeV(TPNS2)驱动的光中子源。前者建成后可提供飞行路径5 m、通量约104 n·s-1·cm-2的连续能量中子束(白光中子)及约1 MeV低能伽马射线,它们分别用于测量中子反应截面和伽马辐照研究,这是国内首台用于核数据测量的白光中子源。
The safe operation of nuclear reactors, the design of next-generation reactors, and nuclear waste disposal require accurate neutron data. Optical Time of Flight (TOF) measurement is the most accurate neutron energy measurement technique and plays a very important role in the cross-section measurement of thermal neutron and resonant neutron energy. The TMSR Photo-Neutron Source Phase 1 (TPNS1) 15 MeV electron accelerator designed and built for thorium-uranium nuclear data measurement It is located in Jiading Park, Shanghai Institute of Applied Physics, Chinese Academy of Sciences. The first stage is driven by a 15 MeV electron linac (LINAC) and the second stage is intended to create a photo-neutron source powered by about 100 MeV (TPNS2) electrons. The former is capable of providing continuous energy neutron beams (white neutron) with a flight path of 5 m and a flux of about 104 n · s-1 · cm-2 and a low energy gamma ray of about 1 MeV, which are used to measure neutron Cross-section and gamma irradiation research, which is the first white light neutron source used for nuclear data measurement in China.