Electron Thermal Transport Barrier and Density Fluctuation Reduction in a Toroidal Helical Plasma
Physical Review Letters1999Vol. 82(13), pp. 2669–2672
Citations Over TimeTop 1% of 1999 papers
A. Fujisawa, H. Iguchi, T. Minami, Y. Yoshimura, H. Sanuki, K. Itoh, S. Lee, K. Tanaka, M. Yokoyama, M. Kojima, S.‐I. Itoh, S. Okamura, R. Akiyama, K. Ida, M. Isobe, S. Morita, Satoshi Nishimura, M. Osakabe, A. Shimizu, C. Takahashi, K. Toi, Y. Hamada, K. Matsuoka, Masami Fujiwara
Abstract
A thermal transport barrier resulting in a high central electron temperature of $\ensuremath{\sim}2\mathrm{keV}$ is established in the core of electron-cyclotron-resonance heated plasmas of the Compact Helical System Heliotron/Torsatron. The formation of the barrier is correlated with the reduction in the density fluctuations and with a structural change of the radial electric field profile at the barrier location. The results suggest that the decrease in fluctuation should contribute to a reduction of anomalous transport and a drastic increase in electron temperature at the barrier.
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