Speaker
Ms
Natalia Kirneva
(Russian Federation)
Description
Investigation aimed at the understanding of a general origin of the thermal and particle transport has been carried out in regimes with the dominant electron heating in the T-10 tokamak. ECR heating with the power of 0.25-3 MW has been used. Two scans have been summarized for the analysis: density scan at the constant EC heating power value, (P_EC=0.9 MW, P_tot=1 MW), and recently obtained EC heating power scan at the fixed density n_e=1.8*10^19 m^-3=0.25 n_Gw. The value of the effective collisionality was changed in the range nu_eff~0.1-10. For the first time it was shown that the main regularities of the energy and particle confinement do not depend of the method of collisionality modification. These features are the following: i) energy confinement time increase with collisionality and saturates at nu_eff~1-2; ii) the density peaking increases with collisionality and goes to higher level at the same nu_eff value, nu_eff~1-2; iii) the density profile flattening becomes stronger with collisionality increase in the ECR heated discharges in comparison with the ohmically heated discharges taken at the same collisionality.
Country or International Organization of Primary Author
Russian Federation
Primary author
Mr
Vladimir Trukhin
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
Co-authors
Mr
Aleksandr Borschegovskij
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
Mr
Aleksej Sushkov
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
Mr
Dmitrij Sergeev
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
Dr
Dmitrij Shelukhin
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
Mrs
Elena Trukhina
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
Dr
Eugenij Gorbunov
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
Mr
Igor Roy
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
Mr
Leonid Kluchnikov
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
Ms
Natalia Kirneva
(Russian Federation)
Mr
Sergej Krylov
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
Mr
Sergej Maltsev
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
Mrs
Tatiana Myalton
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
Mr
Vadim Krupin
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
Dr
Vladimir Vershkov
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
Mr
Yurij Pavlov
(Institute of Physics of Tokamaks, National Research Center “Kurchatov Institute”)
