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Fast ion transport in the m=1, n=1 kink distorted tokamak central core

V.S. Marchenko1995年被引用 2Nuclear FusionIF 3出版社

It is shown that a residual kink, which is often observed between the crashes in modern tokamaks, leads to the formation of a new kind of fast particle orbit, namely toroidally trapped superbanana orbits. The width of the banana guiding centre trajectory for such orbits scales as Δr/r ~ (ξ/R0)1/2, where ξ is the amplitude of the kink distortion of the magnetic axis and R0 is the major radius of the tokamak. The superbanana diffusion regime, which is realized for energetic beam ions, leads to a characteristic time of the fast ion losses outside the q=1 surface that is comparable with, or even smaller than, the corresponding thermalization time

日本語訳

現代トカマクにおけるクラッシュの間にしばしば観測される残留キンクが、新型の高速粒子軌道、すなわちトロイダル方向に閉じ込められたスーパーバナナ軌道の形成をもたらすことを示す。このような軌道に対するバナナ案内中心軌道の幅は、Δr/r ~ (ξ/R0)^{1/2} というスケーリングに従う。ここでξは磁気軸のキンク変形の振幅、R0はトカマクの大半径である。高エネルギーイオンに対して実現されるスーパーバナナ拡散レジームは、q=1表面外側での高速イオン損失に特徴的な時間スケールをもたらし、これは対応する熱化時間と同程度か、それよりも短くなり得る。

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Fusion Advanced Studies TorusEnergetic ionIon transport
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