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Observation and empirical modelling of the anomalous particle pinch in TCV

A Zabolotsky, H Weisen, TCV Team2003年Plasma Physics and Controlled FusionIF 2.2出版社

Moderately peaked electron density profiles are observed in virtually all plasma conditions in TCV. The existence of an anomalous pinch is unambiguously demonstrated by the observation of peaked density profiles in stationary, fully relaxed, fully current driven electron cyclotron current drive (ECCD) discharges with Vloop = 0. The behaviour of the density profiles from a database of 300 Ohmic L- and H-mode, as well as electron cyclotron heating and ECCD discharges, is compared to predictions of models based on the Ware pinch, the curvature pinch and anomalous thermodiffusion. Best overall agreement throughout the database is obtained with models combining an anomalous pinch mechanism, such as the curvature pinch, with the Ware pinch.

日本語訳

TCVにおいて、ほぼ全てのプラズマ条件で、緩やかにピークを持つ電子密度分布が観測される。定常状態で、完全に緩和され、完全に電流駆動された電子サイクロトロン電流駆動(ECCD)放電において、Vloop = 0 の条件下でピークを持つ密度分布が観測されることにより、異常ピンチの存在が明確に実証される。300件のオーミックLモードおよびHモード放電、ならびに電子サイクロトロン加熱およびECCD放電からの密度分布の挙動を、Wareピンチ、曲率ピンチ、および異常熱拡散に基づくモデルの予測と比較した。データベース全体を通じて最も良い一致が得られたのは、異常ピンチ機構(例えば曲率ピンチ)とWareピンチを組み合わせたモデルであった。

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