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Confinement improvement with RF poloidal current drive in the reversed field pinch

S. Hokin, J.S. Sarff, C. Sovinec, E. Uchimoto1994年被引用 6Nuclear FusionIF 3出版社

External control of the current density profile in a reversed field pinch (RFP), by means such as RF poloidal current drive, may have beneficial effects well beyond the direct reduction of ohmic input power due to auxiliary heating. Reduction of magnetic turbulence associated with the dynamo, which drives poloidal current in a conventional RFP, may allow operation at lower density and higher electron temperature, for which RF current drive becomes efficient and the RFP operates in a more favourable regime on the n tau -T diagram. Projected parameters for RFX at 2 MA are studied as a concrete example. If RF current drive allows RFX to operate with beta =10% (plasma energy/magnetic energy) at low density (3*1019 m-3) with classical resistivity (i.e. without dynamo enhanced power input), 40 ms energy confinement times and 3 keV temperatures will result, matching the performance of tokamaks of similar size

日本語訳

反転磁場ピンチ(RFP)における電流密度分布の外部制御は、RF電流駆動などの手段により、追加加热によるオーミック入力電力の直接的な低減をはるかに超える有益な効果をもたらす可能性がある。従来のRFPにおいてポロイダル電流を駆動するダイナモ効果に伴う磁気乱流の低減により、より低密度かつより高い電子温度での運転が可能となり、その条件下ではRF電流駆動が効率的となり、RFPはnτ-T線図上でより有利な領域で運転される。具体例として、RFXにおける2 MAでの計画パラメータを検討する。RF電流駆動により、RFXが古典抵抗率(すなわちダイナモによる入力電力増強なし)のもとで、低密度(3×10¹⁹ m⁻³)かつベータ値10%(プラズマエネルギー/磁気エネルギー)で運転できるとすれば、40 msのエネルギー閉じ込め時間と3 keVの温度が達成され、同規模のトカマクの性能に匹敵することになる。

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Current driveReversed field pinch
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