Strong toroidal flow (V_φ) and poloidal flow (V_θ) have been observed in D-³He plasmas with ion cyclotron range of frequencies (ICRF) mode-conversion (MC) heating on the Alcator C-Mod tokamak. The toroidal flow scales with the rf power Prf (up to 30 km/s per MW), and is significantly larger than that in ICRF minority heated plasmas at the same rf power or stored energy. The central V_φ responds to Prf faster than the outer regions, and the V_φ(r) profile is broadly peaked for r/a≤0.5. Localized (0.3≤r/a≤0.5) V_θ appears when Prf≥1.5 MW and increases with power (up to 0.7 km/s per MW). The experimental evidence together with numerical wave modeling suggests a local flow drive source due to the interaction between the MC ion cyclotron wave and ³He ions.
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Lin et al. (2008) studied this question.
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