The Dynamics of Core and Outer Micro-turbulence During the L–I–H Confinement Transition on the EAST Superconducting Tokamak
The Dynamics of Core and Outer Micro-turbulence During the L–I–H Confinement Transition on the EAST Superconducting Tokamak
复制标题
EAST超导托卡马克L-I-H约束转变过程中核心和外部微湍流动力学
DOI：
10.1007/s10894-015-9949-9
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发表时间：
2015-06
期刊：
影响因子：
--
通讯作者：
吴国将
中科院分区：
文献类型：
--
作者：
曹光明;李亚东;李群;张晓东;孙鹏军;吴国将
用切向CO_2激光集体散射系统在EAST上同时研究了低-中-高(L-I-H)约束相变过程中核心和外部微观湍流的动力学。结果表明，微湍流强度在等离子体外部区域附近衰减最强，而在等离子体更深处的减弱幅度较小。在相变过程中，等离子体同一区域相邻波数的宽带湍流之间的交叉相干在I-H相变后立即从小于0.3增加到大于0.8。此外，LCO频率范围内的磁起伏在最终跃迁到H模之前达到最大值，这表明压力梯度的扰动在触发跃迁动力学中可能起到潜在的作用。这些结果将有助于对L-H跃迁机制的更全面的理解。
The dynamics of the core and outer micro-.turbulence during the low–intermediate–high (L–I–H).confinement transition have been investigated simultane-.ously by a tangential CO 2 laser collective scattering system.on EAST. It is found that, the intensity of micro-turbulence.decreases most strongly near the outer region of the.plasma, with less dramatic reduction deeper into the.plasma. During the transition, the cross-coherence between.broadband turbulence at neighboring wave-numbers in the.same region of the plasma increase from less than 0.3 to.greater than 0.8 just after the I–H transition. Besides, the.magnetic fluctuations in the LCO frequency range reaches.a maximum just before the final transition to H-mode,.indicating the plausible underlying role of the perturbation.of the pressure gradient in the triggering of the transition.dynamics. These results would help to achieve a more.comprehensive understanding of the L–H transition.mechanism.
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影响因子：
1.1
作者：
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2.2
作者：
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影响因子：
2.2
作者：
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影响因子：
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通讯作者：
G. McKee;R. Fonck;D. Gupta;D. Schlossberg;M. Shafer;R. Boivin;W. Solomon
DOI：
10.1063/1.3039415
发表时间：
2008-12
期刊：
The Review of scientific instruments
影响因子：
--
作者：
D. Smith;E. Mazzucato;W. Lee;H. Park;C. Domier;N. Luhmann
通讯作者：
D. Smith;E. Mazzucato;W. Lee;H. Park;C. Domier;N. Luhmann