1. CHARACTERIZATION OF ISOTOPE EFFECT ON CONFINEMENT
EX/P3-5 H.Yamada et al., National Institute for Fusion Science, Japan
CHARACTERIZATION OF ISOTOPE EFFECT ON CONFINEMENT
OF DIMENSIONALLY SIMILAR NBI-HEATED PLASMAS in LHD
Isotope effect, which is a long-standing mystery, has been investigated for NBI-heated H and D plasmas in LHD
Clear discrepancy from gyro-Bohm model is identified in comparison of H&D
Energy confinement time
No significant mass dependence in ops. param.
Clear gyro-Bohm AND mass dependence in
non-dimensional expression
Thermal diffusivity
Dimensionally identical H&D Plasma
r*, n* & b are same, but c/W’s are different
Electron channel is robustly improved but
ion channel behaves differently