Direct measurement of current filament structures in a magnetic-confinement fusion device.
Direct measurement of current filament structures in a magnetic-confinement fusion device.
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DOI：
10.1103/physrevlett.102.165001
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发表时间：
2009-04
影响因子：
8.6
通讯作者：
M. Spolaore;N. Vianello;M. Agostini;R. Cavazzana;E. Martines;P. Scarin;G. Serianni;E. Spada;
中科院分区：
文献类型：
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作者：
M. Spolaore;N. Vianello;M. Agostini;R. Cavazzana;E. Martines;P. Scarin;G. Serianni;E. Spada;
在聚变装置的边缘等离子体中检测到的湍流结构，通常被描述为斑点，通常被认为是约束退化的原因。最近的实验证据和理论已经表明了它们的固有电磁性质。在这封信的第一个直接实验测量的平行电流密度与湍流结构的融合实验报告。结构的电磁性质清楚地表明，通过识别电流丝与涡状速度模式和相关的压力扰动。
Turbulent structures detected in the edge plasma of fusion devices, often described as blobs, are generally believed to be responsible for confinement degradation. Recent experimental evidence and theories have suggested their filamentary electromagnetic nature. In this Letter the first direct experimental measurements of the parallel current density associated with turbulent structures in a fusion experiment are reported. The electromagnetic nature of structures is clearly shown by identifying the current filaments with a vortexlike velocity pattern and the associated pressure perturbation.