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Non-local neoclassical transport simulation of geodesic acoustic mode

S. Satake, M. Okamoto, N. Nakajima, H. Sugama, M. Yokoyama, C.D. Beidler2005年被引用 38Nuclear FusionIF 3出版社

Neoclassical transport simulation code (FORTEC-3D) applicable to both axisymmetric and non-axisymmetric configurations is developed to investigate non-local effects on neoclassical transport phenomena. The time evolution of the radial electric field is simulated in the full volume of the confinement region of tokamak and helical model plasmas. It is found that the damping rate of the geodesic-acoustic-mode (GAM) oscillation becomes faster than that predicted from a single-surface transport analysis. The time evolution of the radial electric field towards the ambipolar state shows a non-local behaviour, which indicates a coupling of GAM oscillation between the neighbouring two flux surfaces because of the finite-orbit-width effect.

日本語訳

軸対称および非軸対称配位の両方に適用可能な新古典輸送シミュレーションコード(FORTEC-3D)を開発し、新古典輸送現象に対する非局所効果を調べた。トカマクおよびヘリカル模型プラズマの閉じ込め領域全体において、動径電場の時間発展をシミュレーションした。その結果、測地線音波モード(GAM)振動の減衰率は、単一磁気面輸送解析から予測される値よりも速くなることがわかった。また、動径電場が両極性状態へ向かう時間発展は非局所的挙動を示し、これは有限軌道幅効果により隣接する二つの磁気面間でGAM振動が結合することを示している。

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Acoustic modeGeodesic acoustic modeNeoclassical transport
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