Abstract
Ion Bernstein wave (IBW) heating has been investigated in the HT-7superconducting tokamak. Electron heating mode was concentrated ondeuterium plasma with an injecting power to 320 kW. The bulk electrontemperature showed a significant rise with a heating factor, ΔTe×ne/PRF, up to 9.4 eV×1013 cm-3 kW-1. The direct electron heating via electron Landau damping from IBWhas been demonstrated after intensive RF wall conditioning. Both on-axis andoff-axis electron heating were obtained. Electron temperature profile wasmodified by IBW under different plasma conditions. Edge density showed nosharp drop during IBW heating. Plasma density and temperature remainedalmost unchanged in front of antenna. But edge temperature and densityinside of plasma visibly increased and their profiles became steeper.Particle confinement improvement was observed by IBW.
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