Lower hybrid current drive at high density on Tore Supra
Journal article, 2013
Lower hybrid current drive (LHCD) experiments with line-averaged density varying between 1.5 x 1019 and 6 x 10(19) m(-3) are performed on the Tore Supra tokamak under quasi-steady-state conditions with respect to the fast electron dynamics. The LHCD efficiency is analysed from the fast electron bremsstrahlung (FEB) and electron cyclotron emission (ECE). The effect of plasma equilibrium and particle fuelling is documented. It is concluded that the fast decay of FEB with plasma density could be consistent with simple scaling of the current drive efficiency and FEB. Plasma edge measurements are presented looking for the effect on fast electron emission. In a specific case of particle fuelling, an anomalous decay of the hard x-ray and ECE signals suggests deleterious interaction of the wave with edge plasma.
waves
tokamak
efficiency
parametric-instability
plasmas
Author
M. Goniche
CEA/DSM/IRFM
V. Basiuk
CEA/DSM/IRFM
J. Decker
CEA/DSM/IRFM
P. K. Sharma
CEA/DSM/IRFM
Institute for Plasma Research India
G. Antar
American University of Beirut
CEA/DSM/IRFM
G. Berger-By
CEA/DSM/IRFM
F. Clairet
CEA/DSM/IRFM
L. Delpech
CEA/DSM/IRFM
Annika Ekedahl
CEA/DSM/IRFM
J. Gunn
CEA/DSM/IRFM
J. Hillairet
CEA/DSM/IRFM
X. Litaudon
CEA/DSM/IRFM
D. Mazon
CEA/DSM/IRFM
E. Nilsson
CEA/DSM/IRFM
T. Oosako
CEA/DSM/IRFM
University of Tokyo
Y. Peysson
CEA/DSM/IRFM
M. Preynas
CEA/DSM/IRFM
M. Prou
CEA/DSM/IRFM
J. L. Segui
CEA/DSM/IRFM
Nuclear Fusion
0029-5515 (ISSN) 1741-4326 (eISSN)
Vol. 53 3Subject Categories
Physical Sciences
DOI
10.1088/0029-5515/53/3/033010