Dynamics of high energy negative ions generated by intense laser pulses

强激光脉冲产生的高能负离子的动力学

• 批准号: 21740404
• 负责人: NAKAMURA Tatsufumi
• 金额: $ 1.75万
• 依托单位: Japan Atomic Energy Agency
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740404/
• 关键词: レーザープラズマ相互作用; 相対論プラズマ; レーザーイオン加速; イオン加速; 磁気渦; 負イオン; 粒子シミュレーション; 高強度レーザー

Irradiations of intense laser pulses on gas targets generate high energy charged particles, X-and gamma-rays, and negatively charged ions are also observed in recent experiments. In this study, we proposed Coulomb implosion mechanism which explains the acceleration mechanism of negative ions in laser-plasmas. We also proposed magnetic vortex acceleration, which is an efficient acceleration mechanism of positive ions from gas density plasmas. This mechanism enhances ion energy roughly ten-folds, which could contribute to development of compact laser-drive ion source.

强激光脉冲照射气体目标会产生高能带电粒子、X 射线和伽马射线，并且在最近的实验中还观察到带负电的离子。在这项研究中，我们提出了库仑内爆机制，解释了激光等离子体中负离子的加速机制。我们还提出了磁涡加速，这是气体密度等离子体中正离子的有效加速机制。这种机制将离子能量增强了大约十倍，这可能有助于开发紧凑型激光驱动离子源。

项目成果

Energy Increase in Multi-MeV Ion Acceleration in the Interaction of a Short Pulse Laser with a Cluster-Gas Target

• DOI: 10.1103/physrevlett.103.165002
• 发表时间: 2009-10-16
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Fukuda, Y.;Faenov, A. Ya.;Bulanov, S. V.
• 通讯作者: Bulanov, S. V.