Abstract
A high frequency 130 MHz ion Bernstein wave heating (IBWH) experiment was carried out in JIPP T‐IIU tokamak. Three‐elements center‐fed antenna permitted the launching of a relatively well defined nni spectrum. The 3ΩH heating represents the highest hydrogen harmonic experiment thus far performed. Core plasma heating of both ions and electrons by IBWH alone and also in conjunction with NBI heating was observed. The radiated antenna power reached to 400 kW. An interesting density profile peaking was observed during IBWH, implying that the particle diffusivity is greatly reduced in the half‐radius region of the plasma. This IBWH confinement improvement was retained even with additional high power NBI heating. Some plasma transport analyses have been performed for those discharge.
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