High-Energy Ions from Near-Critical Density Plasmas via Magnetic Vortex Acceleration
High-Energy Ions from Near-Critical Density Plasmas via Magnetic Vortex Acceleration
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DOI：
10.1103/physrevlett.105.135002
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发表时间：
2010-09-23
影响因子：
8.6
通讯作者：
Kando, Masaki
中科院分区：
文献类型：
--
作者：
Nakamura, Tatsufumi;Bulanov, Sergei V.;Kando, Masaki
超强激光脉冲在近临界密度等离子体中传输时产生磁偶极涡旋结构。在等离子体密度降低的区域，涡旋在前向和横向上都扩展。磁场压力推动电子和离子形成沿着涡旋轴的密度跳跃，并感应出纵向电场。这种结构与膨胀的偶极涡旋一起移动。位于电场前面的背景离子被加速到高能量。这种磁涡旋加速机制产生的离子的能量标度推导和证实使用粒子在细胞模拟。
Ultraintense laser pulses propagating in near-critical density plasmas generate magnetic dipole vortex structures. In the region of decreasing plasma density, the vortex expands both in forward and lateral directions. The magnetic field pressure pushes electrons and ions to form a density jump along the vortex axis and induces a longitudinal electric field. This structure moves together with the expanding dipole vortex. The background ions located ahead of the electric field are accelerated to high energies. The energy scaling of ions generated by this magnetic vortex acceleration mechanism is derived and corroborated using particle-in-cell simulations.