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ICRF current drive experiment on JIPP T-IIU

R. Ando, E. Kako, Y. Ogawa, T. Watari1986年被引用 16Nuclear FusionIF 3出版社

In the JIPP T-IIU tokamak an experiment to demonstrate the feasibility of fast wave current drive using five loop antennas has been successfully carried out with a relatively high density plasma (ωpe2/ωce2∼5). The RF frequency is 40 MHz and the toroidal field is 2 kG, which corresponds to ω = 13ωcH. The experiment is conducted in the density range e ∼ 2 × 1018 m−3 where only the fast wave can propagate, eliminating the possibility of slow wave current drive. This density is two orders of magnitude higher than the density limit predicted for slow wave current drive. The dependence of the drive efficiency on the relative phase difference Δφ is clearly observed with a maximum of about Δφ = π/4. The plasma current was limited by MHD instability which begins to occur around qa = 10.

日本語訳

JIPP T-IIUトカマクにおいて、5つのループアンテナを用いた高速波電流駆動の実現可能性を実証する実験が、比較的高密度プラズマ(ωpe2/ωce2∼5)で成功裏に実施された。RF周波数は40 MHz、トロイダル磁場は2 kGであり、これはω = 13ωcに対応する。実験は、密度範囲 e ∼ 2 × 1018 m−3 で実施され、この範囲では高速波のみが伝播可能であり、低速波による電流駆動の可能性は排除される。この密度は、低速波電流駆動について予測された密度限界より2桁高い。駆動効率の相対位相差Δφへの依存性が明確に観測され、最大値は約Δφ = π/4で得られた。プラズマ電流は、qa = 10付近で発生するMHD不安定性によって制限された。

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Ion cyclotron heatingCurrent driveJIPPT-IIU
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