Effect of laser spot size on fusion neutron yield in laser--deuterium cluster interactions |
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Authors: | Chen Guang-Long Lu Hai-Yang Wang Cheng Liu Jian-Sheng Li Ru-Xin Ni Guo-Quan and Xu Zhi-Zhan |
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Institution: | State Key Laboratory of High Field Laser Physics, Shanghai
Institute of Optics and Fine Mechanics, Chinese Academy of
Sciences, Shanghai 201800, China |
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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. |
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Keywords: | clusters femtosecond intense
laser pulse table-top laser driven nuclear fusion |
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