FusionPapers
図版検索トレンドwiki日本の研究
© 2026 FUSIONPAPERS
About法務情報
トップに戻る

Study of slow n = 1, m = 1 reconnection in JET discharges with low central magnetic shear

P Buratti, B Alper, S V Annibaldi, A Becoulet, P Belo, J Bucalossi, M de Baar, P de Vries, D Frigione, C Gormezano2006年Plasma Physics and Controlled FusionIF 2.2出版社

Experiments designed for the attainment of the hybrid advanced mode of operation in JET revealed the existence of a new form of reconnecting modes with toroidal number n = 1 and poloidal number m = 1, which have the same radial structure as sawtooth precursors but are characterized by small growth rate and low saturation amplitude. These modes develop in repetitive cycles with typical growth times of 100 ms. Temperature perturbations are not in the form of sawteeth; in fact, there is slow and mild erosion of the central temperature without any crash. Comparison with theory of m = 1 modes indicates that the slow growth observed in the hybrid regime is caused by low magnetic shear (a measure of the radial variation of field line inclination) and possibly by diamagnetic effects in the plasma core.

日本語訳

JETにおけるハイブリッド先進運転モードの達成を目的として設計された実験により、トロイダル数n=1、ポロイダル数m=1を有する新たな形態の再結合モードの存在が明らかになった。これらのモードは鋸歯状振動の前駆体と同様の径方向構造を有するが、成長率が小さく、飽和振幅も低いという特徴を示す。これらのモードは、典型的な成長時間が100 msの反復サイクルで発達する。温度摂動は鋸歯状振動のような急激な崩壊を示さず、むしろ中心温度の緩やかで穏やかな侵食として現れる。m=1モードの理論との比較により、ハイブリッド運転領域で観測される遅い成長は、磁気シア(磁力線傾斜角の径方向変化の尺度)が低いこと、およびプラズマ中心部における反磁性効果に起因することが示される。

装置

jet高精度(タイトル一致)

wiki

JETMagnetic reconnectionMagnetic shear
この論文にはまだAI要約がありません。

関連論文

Saturated helical mode in EAST high β hybrid plasmas

2020Nuclear Fusion

Moment equations treatment of the reconnecting mode

1977Nuclear Fusion

Stability of the experimental and numerical spheromaks with shear toroidal flow induced by magnetic reconnection

2025Plasma Physics and Controlled Fusion

Long-lasting energetic particle modes in tokamak plasmas with low magnetic shear

2014Plasma Physics and Controlled Fusion

Toroidal mode structure in weak and reversed magnetic shear plasmas and its role in the internal transport barrier

1999Plasma Physics and Controlled Fusion

Nonlinear evolution of ideal pressure-driven MHD modes and their conversion into tearing-type modes

2025Plasma Physics and Controlled Fusion

Experimental study of core MHD events in thousand-second improved confinement plasma on the EAST tokamak

2023Nuclear Fusion

Experimental investigation of m/n = 1/1 and high-order harmonic modes during the sawtooth oscillation in a low β tokamak plasma

2010Plasma Physics and Controlled Fusion

Impact of toroidal rotation on the resistive ballooning modes in ASDEX Upgrade tokamak

2023Plasma Physics and Controlled Fusion

Characterization of low-frequency inter-ELM modes of H-mode discharges at ASDEX Upgrade

2018Nuclear Fusion