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The dependence of ion heat transport on the ion to electron temperature ratio in JET non-rotating plasmas

机译:JET非旋转等离子体中离子传热对离子电子温度比的依赖性

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Detailed experimental studies of ion heat transport are carried out in JET to explore the T_e/T_i dependence of ion heat transport in ITER relevant range of parameters (T_e/T_i 1) using low rotation plasmas with dominant ion cyclotron resonance heating to avoid the coupling of the effects of T_e/T_i and rotation which affected previous experiments. This experimental setup has led to an accurate determination of the ion temperature gradient (ITG) threshold at varying T e/Ti, offering unique opportunities for validation of the well-established theory of ITG driven modes. A rather mild decrease in threshold with increasing T_e/T_i in the interval of ITER interest was found. The new experimental result has found good agreement with theoretical predictions based on quasi-linear fluid and linear gyrokinetic models.
机译:在JET中进行了离子传热的详细实验研究,以探索离子传热在ITER相关参数范围(T_e / T_i 1)中的T_e / T_i依赖性,使用低速等离子体和主要的离子回旋共振加热来避免耦合。 T_e / T_i和旋转的影响影响了先前的实验。此实验设置可在变化的T e / Ti下准确确定离子温度梯度(ITG)阈值,为验证公认的ITG驱动模式理论提供了独特的机会。发现在ITER感兴趣的时间间隔内,阈值随T_e / T_i的增加而略有降低。新的实验结果与基于准线性流体和线性回旋动力学模型的理论预测吻合良好。

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