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

Helical core tokamak MHD equilibrium states

W A Cooper, J P Graves, O Sauter, J Rossel, M Albergante, S Coda, B P Duval, B Labit, A Pochelon, H Reimerdes2011年Plasma Physics and Controlled FusionIF 2.2出版社

Bifurcated magnetohydrodynamic (MHD) tokamak equilibrium states with axisymmetric or helical core structure are computed. When a peaked pressure profile is chosen, the helical core structures appear like the snakes that are observed in the JET tokamak. They also have the allure of saturated ideal internal kinks. The existence of a magnetic island is not a requisite condition. Novel equilibrium states that can model the snake are obtained for a JET configuration when the q-profile has weak reversed magnetic shear with minimum q values in the range 0.94 to 1.03. At the lower end of this qmin range, the equilibrium snake structure lies radially well inside the domain for which qmin ⩽ 1. Free boundary equilibria computed for the TCV tokamak develop helical cores when βN exceeds 0.3 and have a significant axis excursion for βN ⩾ 0.4. At fixed ⟨β⟩ = 1.6%, the distortion of the magnetic axis is large in the range 0.95 ⩽ qmin ⩽ 1.01. The plasma–vacuum interface is not significantly altered by the internal helical deformations.

日本語訳

分岐した磁気流体力学(MHD)トカマク平衡状態が、軸対称またはヘリカルなコア構造を持つものとして計算される。ピーク化された圧力分布を選ぶと、ヘリカルなコア構造はJETトカマクで観測されるスネークのように現れる。それらはまた、飽和した理想内部キンクの特徴も有する。磁気島の存在は必要条件ではない。スネークをモデル化できる新規な平衡状態が、q分布が弱い逆転磁気シアを持ち、最小q値が0.94から1.03の範囲にあるJET配位に対して得られる。このqmin範囲の下限では、平衡スネーク構造はqmin ≤ 1となる領域の径方向内側に位置する。TCVトカマクに対して計算された自由境界平衡は、βNが0.3を超えるとヘリカルコアを発達させ、βN ≥ 0.4で有意な軸変位を示す。⟨β⟩ = 1.6%に固定した場合、磁気軸の変位は0.95 ≤ qmin ≤ 1.01の範囲で大きい。プラズマ・真空界面は、内部のヘリカル変形によって有意に変化することはない。

装置

jet中精度(概要文一致)

wiki

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

関連論文

JET snake magnetohydrodynamic equilibria

2011Nuclear Fusion

Bifurcated helical core equilibrium states in tokamaks

2013Nuclear Fusion

Two types of helical-core equilibrium states in tokamak plasmas

2022Plasma Physics and Controlled Fusion

Magnetohydrodynamic equilibrium and the stability of tokamak and reversed-field pinch systems with 3D helical cores

2011Plasma Physics and Controlled Fusion

Magnetohydrodynamic helical structures in nominally axisymmetric low-shear tokamak plasmas

2013Plasma Physics and Controlled Fusion

Magnetohydrodynamic properties of nominally axisymmetric systems with 3D helical core

2011Plasma Physics and Controlled Fusion

Effects of magnetic helicity on 3D equilibria and self-organized states in KTX reversed field pinch

2024Nuclear Fusion

Ideal saturated MHD helical structures in axisymmetric hybrid plasmas

2014Nuclear Fusion

Use of reconstructed 3D equilibria to determine onset conditions of helical cores in tokamaks for extrapolation to ITER

2018Nuclear Fusion

Impact of helical boundary conditions on nonlinear 3D magnetohydrodynamic simulations of reversed-field pinch

2013Plasma Physics and Controlled Fusion