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Suppression of transport bursts in simulations of edge-localized modes by increasing the magnetic shear

Robert G Kleva2012年Plasma Physics and Controlled FusionIF 2.2出版社

Transport bursts in simulations of edge-localized modes (ELMs) in tokamaks are suppressed by increasing the magnetic shear. As the magnetic shear becomes larger, the magnitude of the bursts is reduced and the frequency of the bursts decreases. The suppression of the ELM bursts by magnetic shear is very similar to the suppression of the bursts by resonant magnetic field perturbations. However, increasing the magnitude of resonant magnetic field perturbations can lead to the destruction of magnetic flux surfaces and magnetic field line stochasticity. In contrast, magnetic flux surfaces are preserved when the magnetic shear is increased in an axisymmetric tokamak magnetic field.

日本語訳

トカマクにおけるエッジ局在モード(ELM)のシミュレーション中のバーストは、磁気シアを増加させることによって抑制される。磁気シアが大きくなるにつれて、バーストの大きさは減少し、バーストの頻度は低下する。磁気シアによるELMバーストの抑制は、共鳴磁場摂動によるバーストの抑制と非常に類似している。しかしながら、共鳴磁場摂動の大きさを増加させると、磁気面の破壊や磁力線のカオス化を引き起こす可能性がある。対照的に、軸対称トカマク磁場において磁気シアを増加させた場合、磁気面は保存される。

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Edge localized modeMagnetic shear
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