A pulsed high-current plasma beam under external and self-induced magnetic confinement in a linear device

被引：2

作者：

Zheng, X. J. ^{[1
,2
]}

Gou, F. J. ^{[3
]}

Zhou, Y. ^{[4
]}

Wang, H. X. ^{[4
]}

Wallace, A. C. ^{[2
]}

Wang, H. B. ^{[1
]}

Huang, Z. H. ^{[4
]}

Ji, X. Q. ^{[4
]}

Liang, S. Y. ^{[4
]}

Liu, W. ^{[2
]}

Feng, Y. T. ^{[1
]}

Deng, B. Q. ^{[4
]}

机构：

[1] Hope Innovat Shanghai Inc, Shanghai, Peoples R China

[2] Hope Innovat Inc, Mississauga, ON L4W 0A5, Canada

[3] Sichuan Univ, Chengdu 610064, Sichuan, Peoples R China

[4] Southwestern Inst Phys, Chengdu 610041, Sichuan, Peoples R China

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2019年 / 61卷 / 10期

基金：

中国国家自然科学基金;

关键词：

experimental verification; self-induced magnetic confinement; linear device; magnetic inertial confinement fusion; MICF; astrophysics; RADIATION; FUSION;

D O I：

10.1088/1361-6587/ab3618

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 previously developed governing equations for Magnetic Inertial Confinement Fusion, which combines the advantages of both magnetic and inertial confinement approaches, are improved to analyse a plasma beam in a linear device assisted by an external magnetic field. The equations are applied to simulate a steady state plasma beam sustained by a DC power supply as well as a transient beam generated by a separate pulsed discharge superimposed on the steady-state plasma. The calculated increase of plasma density during the pulse from the steady-state condition is compared with measurements using a laser interferometer at a relatively low voltage supply of 150 V for the pulses. The numerical and test results are found to agree within 20%. When the voltage rises, plasma instability is observed. This issue is inherent due to the use of a solid positive target electrode that blocks the plasma flow in the axial direction. As a remedy, additional tests were carried out using a hollow target electrode in a two-circuit design (to permit free gas flow in the axial direction) by replacing the DC power with transient, pulsed, high-voltage sources for plasma initiation and beam formation. These enhancements were successful in suppressing the instabilities. The peak plasma density was calculated at similar to 10(22) m(-3) for confinement times of the order of 1 ms. These results lie between the extremes for the current leading approaches yet are achieved for a more compact and inexpensive linear device.

引用

页数：10