L- to H-mode transitions at low density in ASDEX Upgrade
L- to H-mode transitions at low density in ASDEX Upgrade
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DOI：
10.1088/0029-5515/52/1/012001
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发表时间：
2011
期刊：
影响因子：
3.3
通讯作者：
P. Sauter;T. Pütterich;F. Ryter;E. Viezzer;E. Wolfrum;G. Conway;R. Fischer;B. Kurzan;R. McDermott;S. Rathgeber
中科院分区：
文献类型：
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作者：
P. Sauter;T. Pütterich;F. Ryter;E. Viezzer;E. Wolfrum;G. Conway;R. Fischer;B. Kurzan;R. McDermott;S. Rathgeber
ASDEX升级放电专门用于低密度的L到H的转变的调查的结果。通过电子回旋共振加热来加热等离子体，以实现电子和离子热通道的分离。在这样的条件下，在等离子体边缘的电子与离子温度的比率随着L-H转变处的密度的降低而增加，并且可以高达3.5。我们的研究结果强烈支持离子通道在L-H转变中的重要作用，通过离子压力梯度提供的抗磁性Er。
The results from ASDEX Upgrade discharges dedicated specifically to the investigation of low-density L-to-H transitions are presented. The plasmas were heated by electron cyclotron resonance heating to achieve a separation of electron and ion heat channels. Under such conditions, the ratio of electron to ion temperature at the plasma edge increases with decreasing density at the L–H transition and can be as high as 3.5. Our results strongly support the essential role of the ion channel in the L–H transition, via the diamagnetic Er provided by the ion pressure gradient.