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

Plasma response measurements of external magnetic perturbations using electron cyclotron emission and comparisons to 3D ideal MHD equilibrium

M Willensdorfer, S S Denk, E Strumberger, W Suttrop, B Vanovac, D Brida, M Cavedon, I Classen, M Dunne, S Fietz2016年Plasma Physics and Controlled FusionIF 2.2出版社

The plasma response from an external n  =  2 magnetic perturbation field in ASDEX Upgrade has been measured using mainly electron cyclotron emission (ECE) diagnostics and a rigid rotating field. To interpret ECE and ECE-imaging (ECE-I) measurements accurately, forward modeling of the radiation transport has been combined with ray tracing. The measured data is compared to synthetic ECE data generated from a 3D ideal magnetohydrodynamics (MHD) equilibrium calculated by VMEC.The measured amplitudes of the helical displacement around the outboard midplane are in reasonable agreement with the one from the synthetic VMEC diagnostics. Both exceed the predictions from the vacuum field calculations and indicate the presence of a kink response at the edge, which amplifies the perturbation. VMEC and MARS-F have been used to calculate the properties of this kink mode. The poloidal mode structure of the magnetic perturbation of this kink mode at the edge peaks at poloidal mode numbers larger than the resonant components , whereas the poloidal mode structure of its displacement is almost resonant . This is expected from ideal MHD in the proximity of rational surfaces. The displacement measured by ECE-I confirms this resonant response.

日本語訳

ASDEX Upgradeにおける外部のn = 2磁気摂動場からのプラズマ応答は、主に電子サイクロトロン放射(ECE)診断と剛体回転場を用いて測定された。ECEおよびECEイメージング(ECE-I)測定を正確に解釈するために、放射輸送の前方モデリングがレイトレーシングと組み合わされた。測定データは、VMECによって計算された3次元理想磁気流体力学(MHD)平衡から生成された合成ECEデータと比較される。外側中平面の周りの螺旋変位の測定振幅は、合成VMEC診断からのものと合理的に一致する。両方とも真空場計算からの予測を超えており、摂動を増幅するエッジでのキンク応答の存在を示している。VMECとMARS-Fは、このキンクモードの特性を計算するために使用されてきた。このキンクモードの磁気摂動のポロイダルモード構造は、エッジで共鳴成分よりも大きいポロイダルモード数でピークに達する一方、その変位のポロイダルモード構造はほぼ共鳴的である。これは、有理面の近傍での理想MHDから期待される。ECE-Iによって測定された変位は、この共鳴応答を確認する。

装置

asdex-upgrade中精度(概要文一致)

wiki

MagnetohydrodynamicsMagnetic perturbationElectron cyclotron emissionIdeal MHD
この論文にはまだAI要約がありません。

関連論文

Three dimensional boundary displacement due to stable ideal kink modes excited by external n = 2 magnetic perturbations

2017Nuclear Fusion

Characterization of saturated MHD instabilities through 2D electron temperature profile reconstruction from 1D ECE measurements

2013Nuclear Fusion

Impact of plasma response on plasma displacements in DIII-D during application of external 3D perturbations

2014Nuclear Fusion

Overview of ECE diagnostics on LHD

2001Fusion Engineering and Design

Measurement of plasma boundary displacement by n = 2 magnetic perturbations using imaging beam emission spectroscopy

2012Nuclear Fusion

Multimode observations and 3D magnetic control of the boundary of a tokamak plasma

2013Nuclear Fusion

Landau resonant modification of multiple kink mode contributions to 3D tokamak equilibria

2016Nuclear Fusion

Detecting neoclassical tearing modes in high-temperature ITER plasma scenarios with the ITER prototype electron cyclotron emission diagnostic

2024Nuclear Fusion

Comparison of the numerical modelling and experimental measurements of DIII-D separatrix displacements during H-modes with resonant magnetic perturbations

2014Nuclear Fusion

Extending the space of edge harmonic oscillations by magnetic symmetry breaking external coils in tokamaks

2025Plasma Physics and Controlled Fusion