强光一号装置单氘丝中子发射实验研究  

Experimental research of deuterium fiber neutron emission on Qiangguang-Ⅰ facility

作　　者：蒋世伦[1] 宁家敏[1] 许泽平[1] 夏广新[1] 徐荣坤[1] 李正宏[1] 郭洪生[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《强激光与粒子束》2007年第5期841-844,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金资助课题(10035030)

摘　　要：介绍了利用飞行时间技术测量Z箍缩装置单氘丝中子发射。实验发现,Z箍缩中子发射过程中,伴随产生很强的硬X射线,利用铝丝阵产生硬X射线的实验,建立较好的硬X射线屏蔽,大大减弱了它的辐射强度。所采用的双闪烁探测器中子探测系统,进行了3个发次的单氘丝负载实验,确认产生了聚变氘氘中子。4172发次实验测量结果表明,中子产额1.5×109,中子能量为(2.45±0.26)MeV。实验结合分幅照相数据分析认为,峰电流和负载未能很好匹配,等离子体存在不稳定现象。The experiment of deuterium fiber neutron emission was carried out on Qiangguang- Ⅰ facility. The DD neutron measurement device has two scintillator detectors. The experiment shows that measurement of neutron signal could be influenced by quite strong concomitant hard X-ray during the emission of neutrons. An effective shielding system was established for eliminating disturbance and for protecting the detectors from hard X-ray in aluminum array Z-pinch experiment. The emission of DD neutrons was confirmed by time-of-flight method in shot 4172, which resulted in a neutron yield of about 10g and neutron energy of about（2. 454-0.26） MeV.

关 键 词：Z箍缩 氘丝 中子 闪烁探测器 

分 类 号：O53[理学—等离子体物理]