Extended Magnetohydrodynamic Plasma Jets With External Magnetic Fields

被引：10

作者：

Byvank, T. ^{[1
]}

Chang, J. ^{[1
]}

Potter, W. M. ^{[1
]}

Seyler, C. E. ^{[1
]}

Kusse, B. R. ^{[1
]}

机构：

[1] Cornell Univ, Plasma Studies Lab, Ithaca, NY 14853 USA

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2016年 / 44卷 / 04期

基金：

美国国家科学基金会;

关键词：

Magnetic fields; magnetohydrodynamics; plasma jets; pulse power systems; LABORATORY ASTROPHYSICS; GUN;

D O I：

10.1109/TPS.2016.2530634

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：

In this paper, collimated plasma jets form from Joule heating and ablation of a radial foil (Al 15-mu m-thin disk) using a pulsed power generator (Cornell Beam Research Accelerator) with 1-MA peak current and 100-ns rise time. Plasma dynamics of the jet are diagnosed with and without an applied uniform external magnetic field (similar to 1-T axial B-z produced from a pulsed Helmholtz coil) and under a change of current polarity, which corresponds to current moving either radially inward or outward from the foil's central axis. Experimental results are compared with predictions made by numerical simulations (Plasma as an Extended-MHD Relaxation System using an Efficient Upwind Scheme). The influence of the Hall effect on the jet development is observed under opposite current polarities.

引用

页码：638 / 642

页数：5

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