The Madison plasma dynamo experiment: A facility for studying laboratory plasma astrophysics

被引：37

作者：

Cooper, C. M. ^{[1
,2
]}

Wallace, J. ^{[1
]}

Brookhart, M. ^{[1
,2
]}

Clark, M. ^{[1
]}

Collins, C. ^{[1
,2
]}

Ding, W. X. ^{[3
]}

Flanagan, K. ^{[1
]}

Khalzov, I. ^{[1
,2
]}

Li, Y. ^{[1
]}

Milhone, J. ^{[1
,2
]}

Nornberg, M. ^{[1
,2
]}

Nonn, P. ^{[1
]}

Weisberg, D. ^{[1
,2
]}

Whyte, D. G. ^{[4
]}

Zweibel, E. ^{[1
,2
,5
]}

Forest, C. B. ^{[1
,2
]}

机构：

[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[2] Univ Wisconsin, Ctr Magnet Self Org, Madison, WI 53706 USA

[3] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90024 USA

[4] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

[5] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA

来源：

PHYSICS OF PLASMAS | 2014年 / 21卷 / 01期

基金：

美国国家科学基金会;

关键词：

TRANSPORT;

D O I：

10.1063/1.4861609

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 Madison plasma dynamo experiment (MPDX) is a novel, versatile, basic plasma research device designed to investigate flow driven magnetohydrodynamic instabilities and other high-beta phenomena with astrophysically relevant parameters. A 3m diameter vacuum vessel is lined with 36 rings of alternately oriented 4000G samarium cobalt magnets, which create an axisymmetric multicusp that contains similar to 14 m(3) of nearly magnetic field free plasma that is well confined and highly ionized (> 50%). At present, 8 lanthanum hexaboride (LaB6) cathodes and 10 molybdenum anodes are inserted into the vessel and biased up to 500 V, drawing 40A each cathode, ionizing a low pressure Ar or He fill gas and heating it. Up to 100kW of electron cyclotron heating power is planned for additional electron heating. The LaB6 cathodes are positioned in the magnetized edge to drive toroidal rotation through J x B torques that propagate into the unmagnetized core plasma. Dynamo studies on MPDX require a high magnetic Reynolds number R-m > 1000, and an adjustable fluid Reynolds number 10 < Re < 1000, in the regime where the kinetic energy of the flow exceeds the magnetic energy (M-A(2) = (v/v(A))(2) > 1). Initial results from MPDX are presented along with a 0-dimensional power and particle balance model to predict the viscosity and resistivity to achieve dynamo action. (C) 2014 AIP Publishing LLC.

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