Nonambipolar Magnetic-Fluctuation-Induced Particle Transport and Plasma Flow in the MST Reversed-Field Pinch

W. X. Ding, D. L. Brower, D. Craig, B. H. Deng, S. C. Prager, J. S. Sarff, and V. Svidzinski

Phys. Rev. Lett. 99, 055004 – Published 3 August 2007

Abstract

First direct measurements of nonambipolar magnetic fluctuation-induced charge transport in the interior of a high-temperature plasma are reported. Global resistive tearing modes drive the charge transport which is measured in the vicinity of the resonant surface for the dominant core resonant mode. Finite charge transport has two important consequences. First, it generates a potential well along with locally strong electric field and electric field shear at the resonant surface. Second, this electric field induces a spontaneous $E \times B$ driven zonal flow.

Received 10 April 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.055004

Authors & Affiliations

W. X. Ding^1,2, D. L. Brower^1,2, D. Craig^2,3, B. H. Deng¹, S. C. Prager^2,4, J. S. Sarff^2,4, and V. Svidzinski^2,4

¹Department of Physics and Astronomy, University of California at Los Angeles, Los Angeles, California 90095, USA
²Center for Magnetic Self-Organization in Astrophysical and Laboratory Plasmas, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
³Department of Physics, Wheaton College, Wheaton, Illinois 60187, USA
⁴Physics Department, University of Wisconsin–Madison, Madison, Wisconsin 53706, USA

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Vol. 99, Iss. 5 — 3 August 2007

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