中国物理B ›› 2008, Vol. 17 ›› Issue (6): 2124-2129.doi: 10.1088/1674-1056/17/6/030

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Effect of laser spot size on fusion neutron yield in laser--deuterium cluster interactions

陈光龙, 卢海洋, 王成, 刘建胜, 李儒新, 倪国权, 徐至展   

  1. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 收稿日期:2007-08-03 修回日期:2007-12-05 出版日期:2008-06-20 发布日期:2008-06-20
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No 2006CB806000) and the National Natural Science Foundation of China (Grant No 10535070).

Effect of laser spot size on fusion neutron yield in laser--deuterium cluster interactions

Chen Guang-Long(陈光龙), Lu Hai-Yang(卢海洋), Wang Cheng(王成), Liu Jian-Sheng(刘建胜), Li Ru-Xin(李儒新), Ni Guo-Quan(倪国权)†, and Xu Zhi-Zhan(徐至展)‡   

  1. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2007-08-03 Revised:2007-12-05 Online:2008-06-20 Published:2008-06-20
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No 2006CB806000) and the National Natural Science Foundation of China (Grant No 10535070).

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摘要： The effect of the laser spot size on the neutron yield of table-top nuclear fusion from explosions of a femtosecond intense laser pulse heated deuterium clusters is investigated by using a simplified model, in which the cluster size distribution and the energy attenuation of the laser as it propagates through the cluster jet are taken into account. It has been found that there exists a proper laser spot size for the maximum fusion neutron yield for a given laser pulse and a specific deuterium gas cluster jet. The proper spot size, which is dependent on the laser parameters and the cluster jet parameters, has been calculated and compared with the available experimental data. A reasonable agreement between the calculated results and the published experimental results is found.

Abstract: The effect of the laser spot size on the neutron yield of table-top nuclear fusion from explosions of a femtosecond intense laser pulse heated deuterium clusters is investigated by using a simplified model, in which the cluster size distribution and the energy attenuation of the laser as it propagates through the cluster jet are taken into account. It has been found that there exists a proper laser spot size for the maximum fusion neutron yield for a given laser pulse and a specific deuterium gas cluster jet. The proper spot size, which is dependent on the laser parameters and the cluster jet parameters, has been calculated and compared with the available experimental data. A reasonable agreement between the calculated results and the published experimental results is found.

Key words: clusters, femtosecond intense laser pulse, table-top laser driven nuclear fusion

中图分类号:  (Laser-plasma interactions)

  • 52.38.-r
52.50.Jm (Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.))