A dimensionless criterion for characterizing internal transport barriers in JET
A dimensionless criterion for characterizing internal transport barriers in JET
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DOI：
10.1088/0029-5515/42/5/304
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发表时间：
2002-05
期刊：
影响因子：
3.3
通讯作者：
G. Tresset;X. Litaudon;D. Moreau;X. Garbet
中科院分区：
文献类型：
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作者：
G. Tresset;X. Litaudon;D. Moreau;X. Garbet
在不同加热功率和不同磁场强度下进行的实验分析表明，在离子回转半径与局部梯度标度长度之比超过某一临界值的时空区域内，可以推断射流中存在内部输运势垒。一个可能的解释是，这个无量纲参数作为分叉等离子体状态的局域指示器在理论上是由与大压力梯度和等离子体旋转相关的E×B剪切流稳定的。大型数据库分析和实时等离子体控制被设想为有吸引力的应用。
Analysis of experiments performed at different heating powers and magnetic field intensities shows that the existence of internal transport barriers in JET can be inferred in regions of space–time where the ratio of the ion gyroradius to the local gradient scale length exceeds some critical value. A possible interpretation leading to the theoretical relevance of this dimensionless parameter as a local indicator of a bifurcated plasma state is the stabilization of turbulence by the E × B shear flows associated with large pressure gradients and plasma rotation. Large database analysis and real time plasma control are envisaged as attractive applications.