Confinement and dynamics of laser-produced plasma expanding across a transverse magnetic field

被引:193
|
作者
Harilal, SS [1 ]
Tillack, MS [1 ]
O'Shay, B [1 ]
Bindhu, CV [1 ]
Najmabadi, F [1 ]
机构
[1] Univ Calif San Diego, Energy Res Ctr, La Jolla, CA 92093 USA
来源
PHYSICAL REVIEW E | 2004年 / 69卷 / 02期
关键词
D O I
10.1103/PhysRevE.69.026413
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
The dynamics and confinement of laser-created plumes expanding across a transverse magnetic field have been investigated. 1.06 mum, 8 ns pulses from a neodymium-doped yttrium aluminum garnet laser were used to create an aluminum plasma which was allowed to expand across a 0.64 T magnetic field. Fast photography, emission spectroscopy, and time of flight spectroscopy were used as diagnostic tools. Changes in plume structure and dynamics, enhanced emission and ionization, and velocity enhancement were observed in the presence of the magnetic field. Photographic studies showed that the plume is not fully stopped and diffuses across the field. The temperature of the plume was found to increase due to Joule heating and adiabatic compression. The time of flight studies showed that all of the species are slowed down significantly. A multiple peak temporal distribution was observed for neutral species.
引用
收藏
页码:026413 / 1
页数:11
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