Beam distribution modification by Alfven modes

Journal Article · Sat May 15 04:00:00 EDT 2010 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3327208· OSTI ID:21371192

White, R B; Gorelenkov, N ^[1]; Heidbrink, W W ^[2]; Van Zeeland, M A ^[3]

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1. Plasma Physics Laboratory, Princeton University, P.O. Box 451, Princeton, New Jersey 08543 (United States)
2. University of California, Irvine, California 92697 (United States)
3. General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States)

Modification of a deuterium beam distribution in the presence of low amplitude toroidal Alfven eigenmodes and reversed shear Alfven eigenmodes in a toroidal magnetic confinement device is examined. Comparison to experimental data shows that multiple low amplitude modes can account for significant modification of high energy beam particle distributions. It is found that there is a stochastic threshold for beam transport, and that the experimental amplitudes are only slightly above this threshold. The modes produce a substantial central flattening of the beam distribution.

• OSTI ID: 21371192
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 17; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
BEAM TRANSPORT
BEAM-PLASMA SYSTEMS
CONFINEMENT
DISTRIBUTION
EIGENFUNCTIONS
EIGENVALUES
FUNCTIONS
HYDROMAGNETIC WAVES
MAGNETIC CONFINEMENT
PLASMA
PLASMA CONFINEMENT
REVERSED SHEAR