静态真空对超声喷流气体团簇制备的实验研究  

Influence of static vacuum on the preparation of cluster of supersonic gas jet

作　　者：王龙[1,2] 郭尔夫 韩纪锋[3,2] 刘建波[1,2] 李永青[1,2] 周荣[1,2] 杨朝文[1,2] 

机构地区：[1]四川大学物理科学与技术学院,成都610064 [2]辐射物理及技术教育部重点实验室,成都610064 [3]四川大学原子核科学技术研究所,成都610064

出　　处：《物理学报》2014年第20期175-180,共6页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11275133);国家磁约束聚变能发展研究专项(批准号:2014GB125004)资助的课题~~

摘　　要：研究了靶室静态真空对超声喷流气体团簇产生和制备的影响.通过瑞利散射方法测量了不同静态真空度下超声喷流氩团簇的尺度和密度参数,发现在喷嘴出口附近团簇尺度和密度受静态真空度的影响较小;在距离喷嘴较远处,氩气团簇存在同氢气团簇类似的自限制效应,验证了自限制效应在团簇制备、输运过程中的重要作用.该结果对于建造基于激光聚变原理的桌面中子源具有较大的参考意义,可据此简化真空装置以降低运行和维护成本.The influence of static vacuum on the cluster size and density of the supersonic gas jet is studied by Raleigh scattering method. It is found that in a range from 3 ~ 10-4 Pa to 9.9 ~ 104 Pa, the static vacuum has very little influence on the cluster size and desnity. The self-limiting effect which was found for hydrogen cluster at liquid nitrogen temperature is also found for argon cluster at positions far from the nozzle, and it is found to play an important role in the cluster generation and transporation. The result is very valuable for the construction of the desktop neutron source based on laser fusion method, since the pumps and device to supply the vacuum can be reduced and simplified.

关 键 词：激光聚变 桌面中子源 超声喷流团簇 静态真空度 

分 类 号：O469[理学—凝聚态物理]