Magnetic-dipole vortex generation by propagation of ultraintense and ultrashort laser pulses in moderate-density plasmas
Magnetic-dipole vortex generation by propagation of ultraintense and ultrashort laser pulses in moderate-density plasmas
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DOI：
10.1103/physrevlett.100.205006
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发表时间：
2008-05-23
影响因子：
8.6
通讯作者：
Mima, Kunioki
中科院分区：
文献类型：
--
作者：
Nakamura, Tatsufumi;Mima, Kunioki
在近临界密度等离子体中，超强超短激光脉冲在等离子体后部产生磁偶极涡旋。涡旋通过其磁场压力而自我维持，该磁场压力驱逐背景电子，并且所产生的鞘场加速电子以驱动涡旋内的高振幅电流。电子能谱呈非热分布，能量较高。由于涡旋处于电磁平衡状态，因此涡旋是长期稳定的，其结构和特性可以用一个简单的解析模型来解释。
A magnetic-dipole vortex is generated in the behind of an ultraintense and ultrashort laser pulse in a near critical density plasma. The vortex is self-sustained by its magnetic field pressure which expels background electrons, and resulting sheath field accelerates electrons to drive high amplitude electric current inside the vortex. The electron energy spectra shows nonthermal distribution with relatively high energy. The vortex is stable for a long period since it is in the electromagnetic equilibrium, whose structure and characteristics are explained by a simple analytical model.