Co-counter asymmetry in fast wave heating and current drive

Spectral Effects on Fast Wave Core Heating and Current Drive

RF heating and current drive is an essential component in most magnetic fusion devices, including ITER. Recent results obtained with high harmonic fast wave (HHFW) heating and current drive (CD) on NSTX strongly support the hypothesis that the onset of perpendicular fast wave propagation right at or very near the launcher is a primary cause for reduced core heating efficiency at long wavelength...

Fast wave current drive in DEMO

The ability to non-inductively drive a large fraction of the toroidal plasma current in magnetically confined plasmas is an essential requirement for steady state fusion reactors such as DEMO. Besides neutral beam injection (NBI), electron-cyclotron resonance heating (ECRH) and lower hybrid wave heating (LH), ion-cyclotron resonance heating (ICRH) is a promising candidate to drive current, in p...

Multiple Ray Trace Analysis for Fast Wave Heating and Current Drive using LHD Combline Antenna System

N. Takeuchi, H. Idei, A. Fukuyama, T. Seki, R. Kumazawa, T. Mutoh, K. Saito, H. Kasahara, Y. Nakamura, Y. Takase, T. Watari, and LHD ICRF group 1) Ariake National College of Technology, Omuta, Fukuoka 836-8585, Japan 2) Research Institute for Applied Mechanics, Kyushu University, Kasuga, Fukuoka 816-8580, Japan 3) Department of Nuclear Engineering, Kyoto University, Kyoto 606-8501, Japan 4) Nat...

Fast Wave Current Drive on Diii - D

The physics of electron heating and current drive with the fast magnetosonic wave has been demonstrated on DIU-D , in reasonable agreement with theoretical modeling. A recently completed upgrade to the fast wave capability should allow f id noninductive current drive in steady state advanced confinement discharges and provide some current density profile control for the Advanced Tokamak Program...

Co- and Counter-current Rotation Induced by Lower Hybrid Current Drive in Tokamak Plasmas