Stable sustainment of plasmas with electron internal transport barrier by ECH in the LHD
2018
The long pulse experiments in the Large Helical Device has made progress in sustainment of improved confinement states. It was found that steady-state sustainment of the plasmas with improved confinement at the core region, that is, electron internal transport barrier (e-ITB), was achieved with no significant difficulty. Sustainment of a plasma having e-ITB with the line average electron density n e_ave of 1.1 × 1019 m−3 and the central electron temperature T e0 of ~3.5 keV for longer than 5 min only with 340 kW ECH power was successfully demonstrated.
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