期刊
PHYSICS OF PLASMAS
卷 28, 期 12, 页码 -出版社
AIP Publishing
DOI: 10.1063/5.0023601
关键词
-
资金
- Pulsed Power Program at Sandia National Laboratories
Experimental measurements show that imposing a 12T external magnetic field in a gas cell significantly affects laser propagation and energy deposition scale lengths. The axial magnetic field reduces radial electron thermal transport, narrows the plasma width, increases the plasma length, decreases thermal conductivity, and enhances thermal gradients.
We report on experimental measurements of how an externally imposed magnetic field affects plasma heating by kJ-class, nanosecond laser pulses. The experiments reported here took place in gas cells analogous to magnetized liner inertial fusion targets. We observed significant changes in laser propagation and energy deposition scale lengths when a 12T external magnetic field was imposed in the gas cell. We find evidence that the axial magnetic field reduces radial electron thermal transport, narrows the width of the heated plasma, and increases the axial plasma length. Reduced thermal conductivity increases radial thermal gradients. This enhances radial hydrodynamic expansion and subsequent thermal self-focusing. Our experiments and supporting 3D simulations in helium demonstrate that magnetization leads to higher thermal gradients, higher peak temperatures, more rapid blast wave development, and beam focusing with an applied field of 12T.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据