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

• 来源期刊: 中国物理B(英文版)
• 关键词: clusters femtosecond intense laser pulse table-top laser driven nuclear fusion
• 年，卷（期）: 2008,（6）
• 页码范围: 2124-2129
• 页数: 6页
• 语种: 英文

摘要

The effect of the laser spot size on the neutron yield of table-top nuclear fusion from explosions of a femtoseeond 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.