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首页> 外文期刊>Plasma physics and controlled fusion >Intermittent convective transport suppressed by supersonic molecular beam injection on the HL-2A tokamak
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Intermittent convective transport suppressed by supersonic molecular beam injection on the HL-2A tokamak

机译：HL-2A托卡马克上的超音速分子束注入抑制了间歇性对流输运

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摘要

Edge localized mode (ELM)-filament statistical characteristics and intermittent convective transport are studied during ELM mitigation (10-30 ms) induced by supersonic molecular beam injection (SMBI) on the HL-2A tokamak. Langmuir probe data show that the burst rate of large amplitude filaments (δn_e > 4σ) decreases by 30-50% and their radial velocity decreases by 40-60%, which is an indication of an E × B amplitude reduction. A decrease of long-range correlation along the magnetic flux surface is observed after SMBI, indicating a role of electron-ion collisionality on the filament parallel current in the ELM mitigation time. The transient particle and heat fluxes decrease about 40-50% and 50-60%, respectively. These observations indicate that SMBI might be an effective method to suppress the intermittent convective transport.
机译：研究了超音速分子束注入（SMBI）对HL-2A托卡马克引发的ELM缓解（10-30 ms）期间的边缘局部模式（ELM）-细丝统计特性和间歇对流输运。 Langmuir探针数据显示，大振幅长丝（δn_e>4σ）的破裂速率降低30-50％，径向速度降低40-60％，这表明E×B振幅降低。 SMBI后观察到沿磁通量表面的远距离相关性降低，这表明电子离子碰撞性在ELM缓解时间内对灯丝平行电流产生作用。瞬时粒子和热通量分别降低约40-50％和50-60％。这些观察结果表明，SMBI可能是抑制间歇对流输运的有效方法。

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