Experimental characterization of the electron heat transport in low-density ASDEX upgrade plasmas.
The electron heat transport is investigated in ASDEX Upgrade conventional L-mode plasmas with pure electron heating provided by electron-cyclotron heating (ECH) at low density. Under these conditions, steady-state and ECH modulation experiments indicate without ambiguity that electron heat transport exhibits a clear threshold in inverted Delta T(e)/T(e) and also suggest that it has a gyro-Bohm character.
Ryter
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F
Max-Planck-Institut für Plasmaphysik, EURATOM Association, D-85748 Garching, Germany.
Imbeaux
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F
Leuterer
F
F
Fahrbach
H U
HU
Suttrop
W
W