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首页> 外文期刊>Plasma physics and controlled fusion >Boundary perturbations coupled to core 3/2 tearing modes on the DIII-D tokamak
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Boundary perturbations coupled to core 3/2 tearing modes on the DIII-D tokamak

机译：DIII-D托卡马克上与核心3/2撕裂模式耦合的边界扰动

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摘要

High confinement (H-mode) discharges on the DIII-D tokamak are routinely subject to the formation of long-lived, non-disruptive magnetic islands that degrade confinement and limit fusion performance. Simultaneous, 2D measurement of electron temperature fluctuations in the core and edge regions allows for reconstruction of the radially resolved poloidal mode number spectrum and phase of the global plasma response associated with these modes. Coherent, n = 2 excursions of the plasma boundary are found to be the result of coupling to an n = 2, kink-like mode which arises locked in phase to the 3/2 island chain. This coupling dictates the relative phase of the displacement at the boundary with respect to the tearing mode. This unambiguous phase relationship, for which no counter-examples are observed, is presented as a test for modeling of the perturbed fields to be expected outside the confined plasma.
机译：DIII-D托卡马克上的高约束（H模式）放电通常会形成长寿命，无干扰的磁岛，从而降低约束并限制融合性能。核心区域和边缘区域中电子温度波动的同时二维测量可以重建径向解析的多态模式数谱和与这些模式相关的整体等离子体响应的相位。发现等离子体边界的相干n = 2偏移是耦合到n = 2的结果，扭结状模式出现在相位上与3/2岛链锁相。这种耦合决定了相对于撕裂模式在边界处位移的相对相位。这种明确的相位关系（没有观察到反例）被呈现为对受限等离子体外部预期的扰动场进行建模的测试。

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