Turbulent transport of fast ions in the Large Plasma Device

Shu Zhou; W. W. Heidbrink; H. Boehmer; R. McWilliams; T. Carter; S. Vincena; S. K.P. Tripathi; P. Popovich; B. Friedman; F. Jenko

doi:10.1063/1.3486532

Turbulent transport of fast ions in the Large Plasma Device

Shu Zhou
, W. W. Heidbrink
, H. Boehmer
, R. McWilliams
, T. Carter
, S. Vincena
, S. K.P. Tripathi
, P. Popovich
, B. Friedman
, F. Jenko

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Strong drift wave turbulence is observed in the Large Plasma Device [H. Gekelman, Rev. Sci. Instrum. 62, 2875 (1991)] on density gradients produced by a plate limiter. Energetic lithium ions orbit through the turbulent region. Scans with a collimated ion analyzer and with Langmuir probes give detailed profiles of the fast ion spatial distribution and the fluctuating fields. The fast ion transport decreases rapidly with increasing fast ion gyroradius. Unlike the diffusive transport caused by Coulomb collisions, in this case the turbulent transport is nondiffusive. Analysis and simulation suggest that such nondiffusive transport is due to the interaction of the fast ions with stationary two-dimensional electrostatic turbulence.

Original language	English
Article number	092103
Journal	Physics of Plasmas
Volume	17
Issue number	9
DOIs	https://doi.org/10.1063/1.3486532
State	Published - Sep 2010
Externally published	Yes

Funding

Helpful discussions with Liu Chen, Walter Gekelman, Zhihong Lin, and Tim Stoltzfus-Dueck, and the assistance of Marvin Drandell, Zoltan Lucky, Bart Van Compernolle, and Patrick Prybil with the experiment are gratefully acknowledged. This work was supported by DOE Contract No. DE-FG02-03ER54720 and performed at the LAPD basic plasma user facility supported by the NSF/DOE.

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title = "Turbulent transport of fast ions in the Large Plasma Device",

abstract = "Strong drift wave turbulence is observed in the Large Plasma Device [H. Gekelman, Rev. Sci. Instrum. 62, 2875 (1991)] on density gradients produced by a plate limiter. Energetic lithium ions orbit through the turbulent region. Scans with a collimated ion analyzer and with Langmuir probes give detailed profiles of the fast ion spatial distribution and the fluctuating fields. The fast ion transport decreases rapidly with increasing fast ion gyroradius. Unlike the diffusive transport caused by Coulomb collisions, in this case the turbulent transport is nondiffusive. Analysis and simulation suggest that such nondiffusive transport is due to the interaction of the fast ions with stationary two-dimensional electrostatic turbulence.",

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AU - Zhou, Shu

AU - Heidbrink, W. W.

AU - Boehmer, H.

AU - McWilliams, R.

AU - Carter, T.

AU - Vincena, S.

AU - Tripathi, S. K.P.

AU - Popovich, P.

AU - Friedman, B.

AU - Jenko, F.

PY - 2010/9

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AB - Strong drift wave turbulence is observed in the Large Plasma Device [H. Gekelman, Rev. Sci. Instrum. 62, 2875 (1991)] on density gradients produced by a plate limiter. Energetic lithium ions orbit through the turbulent region. Scans with a collimated ion analyzer and with Langmuir probes give detailed profiles of the fast ion spatial distribution and the fluctuating fields. The fast ion transport decreases rapidly with increasing fast ion gyroradius. Unlike the diffusive transport caused by Coulomb collisions, in this case the turbulent transport is nondiffusive. Analysis and simulation suggest that such nondiffusive transport is due to the interaction of the fast ions with stationary two-dimensional electrostatic turbulence.

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VL - 17

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 9

M1 - 092103

ER -

Turbulent transport of fast ions in the Large Plasma Device

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