ICF中子发射时间诊断

摘要

The neutron emission time diagnostic was researched, and a bang time detector was made with ultra fast scintilla-tor and microchannel-plate photomutiplier tube. The neutron emission time diagnostic was implemented in the implosion experiments at certain large-scale laser facility prototype, and the time interval between the beginning of the laser pulse and bang time was acquired. The experiment showed that DD and DT neutron can both be detetcted by the detector, and this detector can work in implosion experiments in which neutron yield is greater than 107. Its timing precision is less than 20 ps. We found that the neutron emission time is relative to the thickness of CH layers clothed outside the targets in several shots.%对ICF中子发射时间的诊断技术进行了研究,研制了基于快闪烁体和微通道板式光电倍增管的中子发射时间探测器.在某大型激光原型装置上进行了中子发射时间的实验测量,成功获得多发实验的中子发射时间与打靶激光脉冲的时间及中子发射时间之间的关系.实验结果表明:中子发射时间探测器对DT中子和DD中子都能够响应,中子产额测量下限达到107,时间测量不确定度小于20 ps;CH烧蚀层越厚,中子发射时间越长.