Convective amplification of magnetic fields in laser-produced plasmas by the Nernst effect
Convective amplification of magnetic fields in laser-produced plasmas by the Nernst effect
复制标题
通过能斯特效应对激光产生的等离子体中的磁场进行对流放大
DOI：
10.1103/physrevlett.53.262
复制
发表时间：
1984
影响因子：
8.6
通讯作者：
H. Takewaki
中科院分区：
文献类型：
--
作者：
A. Nishiguchi;T. Yabe;M. Haines;M. Psimopoulos;H. Takewaki
由于能斯特效应，发现磁场B被电子热通量q/sub e/对流，即，速度为V/sub T/（约为2 q/sub e//3 n/sub e/T/sub e/）。在激光驱动烧蚀中，对流是朝向过密区的，由于delxV/sub T/ c/.，B可以放大10- 100倍。omega../ sub pe/.空间扩展和放大的磁场可以抑制热电子传输，减少预热。For .. omega../ sub e/tau/sub e/>1时，临界表面和烧蚀表面靠得更近，从而增加了流体动力学耦合。
A magnetic field B is found to be convected by the electron heat flux q/sub e/ because of the Nernst effect, i.e., with a velocity V/sub T/(approx.2q/sub e//3n/sub e/T/sub e/). In laser-driven ablation the convection is towards the overdense region and B can be amplified by 10--100 times due to delxV/sub T/ c/..omega../sub pe/. The spatially extended and amplified magnetic field can inhibit hot-electron transport, reducing preheat. For ..omega../sub e/tau/sub e/>1, the critical and ablation surfaces are brought closer together, which increases hydrodynamic coupling.