Fusion Plasma Research
Fast Wave Current Drive Study
Improvement of confinement by current profile control and steady-state tokamak operation
Traveling wave antenna (Combline antenna)
Collaboration with General Atomics
  • Sharp directivity with 12 current straps
  • No need for phase adjustment per individual current strap

Combline antenna installed in the JFT-2M vacuum vessel

Experimental results
  • No need for impedance matching from vacuum- to plasma loading
    demonstration of fast wave pre-ionization
  • No problem of mismatching on H-transition and ELMs

Negative shear experiments will be performed in combination with electron cyclotron heating.