Magnetic-Fluctuation-Induced Particle Transport and Density Relaxation in a High-Temperature Plasma

W. X. Ding, D. L. Brower, G. Fiksel, D. J. Den Hartog, S. C. Prager, J. S. Sarff

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The first direct measurement of magnetic-fluctuation-induced particle flux in the core of a high-temperature plasma is reported. Transport occurs due to magnetic field fluctuations associated with global tearing instabilities. The electron particle flux, resulting from the correlated product of electron density and radial magnetic fluctuations, accounts for density profile relaxation during a magnetic reconnection event. The measured particle transport is much larger than that expected for ambipolar particle diffusion in a stochastic magnetic field.

Original languageEnglish (US)
Article number025001
JournalPhysical review letters
Volume103
Issue number2
DOIs
StatePublished - Aug 6 2009

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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