惯性约束核聚变实验中子飞行时间谱仪的时间测量插件  

A TDC module used in nTOF of ICF

作　　者：张岳华[1] 李锋[1] 金革[1] 虞孝麒[1] 江晓[1] 

机构地区：[1]安徽省物理电子学重点实验室中国科学技术大学,合肥230026

出　　处：《核技术》2007年第3期227-230,共4页Nuclear Techniques

基　　金：博士点基金项目(20050358047)资助

摘　　要：大型的惯性约束核聚变(ICF)设施都采用中子飞行时间(nTOF)探测系统测量离子温度。大阵列中子探测器系统作为国际上使用的最主要探测手段,已成为ICF诊断平均密度半径积?ρR?的标准技术。用于“神光III”原型及主机的灵敏中子探测器阵列的时间分辨期望达到1 ns,为此探测器后的电子学系统的时间分辨期望达到100 ps。采用ACAM公司的GP2作为时间测量插件的核心芯片,我们研制了基于VME总线的多通道TDC时间测量插件,其时间分辨小于61 ps。Neutron time-of-flight （TOF） can provide important information about the fuel-ion bum temperature in various inertial-confinement-fusion （ICF） target designs. The sensitive neutron detector array is used to increase sensitivity while maintaining good time resolution for low-yield targets. It has been a standard technique to diagnose the average density-radius product（ρR）, which is a very important parameter in ICF experiments. The time resolution of the sensitive neutron detector array which will be used in ＂Shen Guang Ⅲ＂ system is expected to be 1 ns, and the one of the electronic system connected with the detectors is 100 ps. Based on the next generation of TDCs from ACAM, TDC-GP2, a VME-plug-in multi-chanel TDC module, with a time-resolution of less than 61 ps, has been designed.

关 键 词：惯性约束聚变 中子飞行时间 GP2 TDC VME总线 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]