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.
tokamak
efficiency
waves
plasmas
parametric-instability
Author
M. Goniche
CEA Cadarache
V. Basiuk
CEA Cadarache
J. Decker
CEA Cadarache
P. K. Sharma
Institute for Plasma Research India
CEA Cadarache
G. Antar
American University of Beirut
CEA Cadarache
G. Berger-By
CEA Cadarache
F. Clairet
CEA Cadarache
L. Delpech
CEA Cadarache
Annika Ekedahl
CEA Cadarache
J. Gunn
CEA Cadarache
J. Hillairet
CEA Cadarache
X. Litaudon
CEA Cadarache
D. Mazon
CEA Cadarache
E. Nilsson
CEA Cadarache
T. Oosako
CEA Cadarache
University of Tokyo
Y. Peysson
CEA Cadarache
M. Preynas
CEA Cadarache
M. Prou
CEA Cadarache
J. L. Segui
CEA Cadarache
Nuclear Fusion
0029-5515 (ISSN) 1741-4326 (eISSN)
Vol. 53 3Subject Categories (SSIF 2011)
Physical Sciences
DOI
10.1088/0029-5515/53/3/033010