ISSN:
1562-6938
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Results from T-10 experiments in regimes with nonmonotonic plasma current profiles are presented. The possibility of controlling the current profile j(r) by electron-cyclotron current drive is demonstrated experimentally. Nonmonotonic q profiles with the reversed shear are obtained in which the q min value varies in a wide range, q min=1–2.3. It is shown that the current profiles with q min∼2 (in this case, there are two resonant magnetic surfaces q=2 in the plasma) can cause the onset of MHD instabilities. The possibility of the formation of an internal transport barrier in reversed-shear discharges in the T-10 tokamak is analyzed. In T-10, electron transport is governed by short-wavelength electron turbulence. As a result, there is no clear evidence of the formation of an inner transport barrier in these experiments.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1134/1.952849
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