CHARACTERIZATION OF ISOTOPE EFFECT ON CONFINEMENT

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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