Ion temperature fluctuations in the ASDEX Upgrade scrape-off layer
Ion temperature fluctuations in the ASDEX Upgrade scrape-off layer
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DOI：
10.1088/0741-3335/54/8/085009
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发表时间：
2012-08
影响因子：
2.2
通讯作者：
M. Kocan;F. Gennrich;A. Kendl;H. W. Müller
中科院分区：
文献类型：
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作者：
M. Kocan;F. Gennrich;A. Kendl;H. W. Müller
在ASDEX升级托卡马克的L模放电期间，通过阻滞场分析仪测量了湍流等离子体细丝中的离子温度$T_{i,\text{fil}}$。在分界面外2厘米处，$T_{i,\text{fil}}\approx80 - 110$电子伏特，这是背景离子温度的3 - 4倍，是分界面处离子温度的50 - 70%。假设在近刮削层中细丝的径向传播速度为400 - 1000米/秒，通过平行细丝传输的流体模型重现了$T_{i,\text{fil}}$，这与早期的实验估计相符。在实验中用于测量$T_{i,\text{fil}}$的条件采样在从陀螺流体湍流模拟获得的人工时间序列上进行了测试。
The ion temperature in turbulent plasma filaments Ti fil is measured by a retarding field analyser during L-mode discharges in the ASDEX Upgrade tokamak. At 2 cm outside the separatrix Ti fil ≈ 80–110 eV, which is 3–4 times that of the background ions and 50–70% of the ion temperature at the separatrix. Ti fil is reproduced by a fluid model of the parallel filament transport assuming the radial filament propagation speed of 400–1000 m s−1 in the near scrape-off layer, consistent with earlier experimental estimates. The conditional sampling used in experiment to measure Ti fil is tested on artificial time series obtained from a gyrofluid turbulence simulation.