Energy Increase in Multi-MeV Ion Acceleration in the Interaction of a Short Pulse Laser with a Cluster-Gas Target
Energy Increase in Multi-MeV Ion Acceleration in the Interaction of a Short Pulse Laser with a Cluster-Gas Target
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DOI：
10.1103/physrevlett.103.165002
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发表时间：
2009-10-16
影响因子：
8.6
通讯作者：
Bulanov, S. V.
中科院分区：
文献类型：
--
作者：
Fukuda, Y.;Faenov, A. Ya.;Bulanov, S. V.
本文提出了一种利用团簇气体靶和能量为150-mJ、脉宽为40-fs的超短脉冲激光加速离子的方法。每个核子的能量为10-20 MeV、小发散(全角)为3.4度的离子是在正向产生的，与以前使用固体靶的实验相比，离子能量大约增加了10倍。粒子模拟结果表明，在亚临界密度等离子体中，由于形成了强偶极子涡旋结构，高能离子在靶的背面产生。
An approach for accelerating ions, with the use of a cluster-gas target and an ultrashort pulse laser of 150-mJ energy and 40-fs duration, is presented. Ions with energy 10-20 MeV per nucleon having a small divergence (full angle) of 3.4 degrees are generated in the forward direction, corresponding to approximately tenfold increase in the ion energies compared to previous experiments using solid targets. It is inferred from a particle-in-cell simulation that the high energy ions are generated at the rear side of the target due to the formation of a strong dipole vortex structure in subcritical density plasmas.