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24 April 2024

» pubmed » pmid17026107

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Observation and control of transverse energy-transport barrier due to the formation of an energetic-electron layer with sheared ExB flow
T Cho ; J Kohagura ; T Numakura ; M Hirata ; H Higaki ; H Hojo ; M Ichimura ; K Ishii ; K Md Islam ; A Itakura ; I Katanuma ; R Minami ; Y Nakashima ; T Saito ; Y Tatematsu ; O Watanabe ; M Yoshikawa ; A Kojima ; Y Miyake ; Y Miyata ; K Shimizu ; Y Tomii ; M Yoshida ; K Sakamoto ; T Imai ; V P Pastukhov ; S Miyoshi ; ;
Date:	4 Aug 2006
Journal:	Phys Rev Lett, 97 (5), 055001
Abstract:	Off-axis electron-cyclotron heating in an axisymmetric barrier mirror produces a cylindrical layer with energetic electrons, which flow through the central cell and into the end region. The layer, producing a localized bumped ambipolar potential Phi(C), forms a strong shear of radial electric fields E(r) and peaked vorticity with the direction reversal of E(r)xB sheared flow near the Phi(C) peak. Intermittent vortexlike turbulent structures near the layer are suppressed in the central cell by this actively produced transverse energy-transport barrier; this results in T(e) and T(i) rises surrounded by the layer.
Source:	PubMed, pmid17026107
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