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Initiation of plasma current with the assistance of electron cyclotron waves in the WT-3 tokamak

S. Tanaka, K. Hanada, T. Minami, S. Ide, M. Iida, H. Tanaka, T. Maekawa, Y. Terumichi1993年被引用 25Nuclear FusionIF 3出版社

In the WT-3 tokamak, the toroidal plasma current is started and ramped up to 6.3 kA by the electron cyclotron (EC) wave alone, without ohmic heating (OH) power. After generation of the plasma current by the EC wave, the OH current can be started up with a very low ohmically induced electric field, i.e. <0.32 V/m, which is extremely small compared with that (2.5 V/m) in an OH discharge with the assistance of EC resonance preionization. The low value of the starting loop voltage is in accordance with the requirements of the ITER design. It is demonstrated that the loop voltage and the flux of the OH transformer can be reduced considerably when the EC power is used for preionization and startup of the toroidal current before initiation of an OH discharge in tokamaks

日本語訳

WT-3トカマクにおいて、トロイダルプラズマ電流は、オーミック加熱(OH)電力なしで、電子サイクロトロン(EC)波のみによって開始され、6.3 kAまで立ち上げられた。EC波によるプラズマ電流の生成後、OH電流は、EC共鳴予備電離の支援を伴うOH放電における値(2.5 V/m)と比較して極めて小さい、非常に低いオーミック誘導電界、すなわち0.32 V/m未満で立ち上げることができる。開始ループ電圧の低い値は、ITER設計の要件と一致している。トカマクにおけるOH放電の開始前にEC電力を予備電離およびトロイダル電流の立ち上げに使用する場合、ループ電圧およびOH変圧器の磁束を大幅に低減できることが実証されている。

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Cyclotron waveElectron cyclotron wave
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