强脉冲中子源时间分布下降沿探测技术研究  

The Technology Study of Measuring Fall Time of DPF Neutron Profile

作　　者：郭洪生[1] 杨高照[1] 胡青元[1] 司粉妮[1] 彭太平[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《核电子学与探测技术》2013年第6期695-698,共4页Nuclear Electronics & Detection Technology

摘　　要：利用塑料闪烁体和光电倍增管组成的测量系统（ST—PMT系统）具备极短荧光衰减时间和高灵敏电荷放大能力的优点，研制了门控ST—PMT探测器阵列，成功对DPF波形后沿中子峰下3～4个量级的物理图像进行了诊断测量。测量了PF-22等离子体焦点装置（DPF）中子波形峰下3个量级与中子峰的时间间隔，在距DPF峰时间50、100、160和290118处，与DPF峰相差倍数为10、100、300和1000倍。Based on the characteristics of ST - PMT neutron measuring system with short decay - time of light emission and its high - sensitivity of charge - magnification, the gate - switch detectors array system is made to measure neutron profile of Dense Plasma Focus（DPF） fall 3 order of magnitude after peak. For the neutron profile of Dense Plasma Focus（DPF） Facility PF-22, the time interval between the peak time and the time that fall 3 order of magnitude after peak is measured with gated - detector array system which consists of PMT（ photomultiplier tube） and organic scintillation crystal. At the time 50, 100, 160,290ns after peak of DPF neuron profile, the values of profile are reduced by a factor of 10, 100,300, 1000 relative to the peak respectively.

关 键 词：门控阵列探测系统 等离子体聚焦装置(DPF) 中子波形 测量 

分 类 号：TN911[电子电信—通信与信息系统]