Stable sustainment of plasmas with electron internal transport barrier by ECH in the LHD

Stable sustainment of plasmas with electron internal transport barrier by ECH in the LHD

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 s...

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Veröffentlicht in:Plasma physics and controlled fusion 2018-02, Vol.60 (2), p.25012
Hauptverfasser: Yoshimura, Y, Kasahara, H, Tokitani, M, Sakamoto, R, Ueda, Y, Marushchenko, N B, Seki, R, Kubo, S, Shimozuma, T, Igami, H, Takahashi, H, Tsujimura, T I, Makino, R, Kobayashi, S, Ito, S, Mizuno, Y, Okada, K, Akiyama, T, Tanaka, K, Tokuzawa, T, Yamada, I, Yamada, H, Mutoh, T, Takeiri, Y
Format: Artikel
Sprache:eng
Schlagworte:
electron cyclotron heating
internal transport barrier
LHD
long pulse discharge
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Zusammenfassung: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 ne_ave of 1.1 × 1019 m−3 and the central electron temperature Te0 of ∼3.5 keV for longer than 5 min only with 340 kW ECH power was successfully demonstrated.
ISSN:0741-3335
1361-6587
DOI:10.1088/1361-6587/aa9950