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Measurement and analysis of neutron sawteeth on the Frascati Tokamak

P. Batistoni, M. Rapisarda, D. Anderson1990年被引用 9Nuclear FusionIF 3出版社

The time evolution of neutron emission has been measured in sawtoothing discharges in the Frascati Tokamak (FT). The observed change in the neutron emission level during the sawtooth crash has been studied in terms of variations of the deuteron density and temperature. Changes of the peak values of these quantities as well as profile changes have been considered. It is shown that the occurrence of a net ion energy outflow through the mixing radius after a sawtooth collapse can explain the observed drop in the neutron emission. The model is also used to infer the ion thermal conductivity near the plasma centre which is found to be compatible with neoclassical predictions.

日本語訳

中性子放出の時間発展が、フラスカティ・トカマク(FT)における鋸歯状放電中に測定された。鋸歯状クラッシュ中の観測された中性子放出レベルの変化は、重水素密度および温度の変動の観点から研究された。これらの量のピーク値の変化に加え、プロファイルの変化も考慮された。鋸歯状コラプス後の混合半径を通じた正味のイオンエネルギー流出の発生が、観測された中性子放出の低下を説明し得ることが示された。このモデルはまた、プラズマ中心付近のイオン熱伝導率を推定するためにも用いられ、その値は新古典理論の予測と整合することが見出された。

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