This title appears in the Scientific Report :
2004
Please use the identifier:
http://dx.doi.org/10.1088/0029-5515/44/10/002 in citations.
Please use the identifier: http://hdl.handle.net/2128/1841 in citations.
Reduced core transport in T-10 and TEXTOR discharges at rational surfaces with low magnetic shear
Reduced core transport in T-10 and TEXTOR discharges at rational surfaces with low magnetic shear
It has been observed in the T-10 tokamak that immediately after off-axis electron cyclotron resonance heating (ECRH) switch-off, the core electron temperature stays constant for some time, which can be as long as several tens of milliseconds, i.e. several energy confinement times (tau(E)), before it...
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Personal Name(s): | Razumova, K. A. |
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Donné, A. J. H. / Andreev, V. F. / Hogeweij, G. M. D. / Bel'bas, I. S. / Borschegovskij, A. A. / Dnestrovskij, A. Yu. / Christyakov, V. V. / Jaspers, R. / Kislov, A. Ya. / I'lin, V. I. / Krupin, D. A. / Krylov, S. V. / Kravtsov, D. E. / Liang, Y. / Lysenko, S. E. / Maslov, M. V. / Min, E. / Myalton, T. B. / Notkin, G. E. / Ossipenko, M. V. / Piterskij, V. V. / Petrov, D. P. / Roi, I. N. / Ryzhakov, D. V. / Shelukhin, D. A. / Sushkov, A. V. / Trukhin, V. M. / Vershkov, V. A. / Westerhof, E. / T-10, Team / TEXTOR, Team | |
Contributing Institute: |
Institut für Plasmaphysik; IPP |
Published in: | Nuclear fusion, 44 (2004) S. 1067 - 1074 |
Imprint: |
Vienna
IAEA
2004
|
Physical Description: |
1067 - 1074 |
DOI: |
10.1088/0029-5515/44/10/002 |
Document Type: |
Journal Article |
Research Program: |
Kernfusion und Plasmaforschung |
Series Title: |
Nuclear Fusion
44 |
Subject (ZB): | |
Link: |
Get full text OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/1841 in citations.
It has been observed in the T-10 tokamak that immediately after off-axis electron cyclotron resonance heating (ECRH) switch-off, the core electron temperature stays constant for some time, which can be as long as several tens of milliseconds, i.e. several energy confinement times (tau(E)), before it starts to decrease. Whether or not the effect is observed depends critically on the local magnetic shear in the vicinity of the q = 1 rational surface, which should be close to zero. It is hypothesized that a small shear can induce the formation of an internal transport barrier. Measurements of density fluctuations in the transport barrier with a correlation reflectometer show immediately after the ECRH switch-off a clear reduction in the fluctuation level, corroborating the above results. The delayed temperature decrease has also been observed in similar discharges in the TEXTOR tokamak; however, the delay is restricted to similar to1 x tau(E). |