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.
Received: 03 August 2007
Revised: 05 December 2007
Accepted manuscript online:
(Plasma production and heating by laser beams (laser-foil, laser-cluster, etc.))
Fund: Project supported by the National
Basic Research Program of China (Grant No 2006CB806000) and the
National Natural Science Foundation of China (Grant No 10535070).
Cite this article:
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) Effect of laser spot size on fusion neutron yield in laser--deuterium cluster interactions 2008 Chin. Phys. B 17 2124
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