How is turbulence intensity determined by macroscopic variables in a toroidal plasma?
How is turbulence intensity determined by macroscopic variables in a toroidal plasma?
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DOI：
10.1088/0029-5515/53/11/113006
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发表时间：
2013-11
期刊：
影响因子：
3.3
通讯作者：
S. Inagaki;T. Tokuzawa;N. Tamura;S. Itoh;T. Kobayashi;K. Ida;T. Shimozuma;S. Kubo;K. Tanaka-K.
中科院分区：
文献类型：
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作者：
S. Inagaki;T. Tokuzawa;N. Tamura;S. Itoh;T. Kobayashi;K. Ida;T. Shimozuma;S. Kubo;K. Tanaka-K.
我们报告的动态响应的微观波动和湍流通量的观测低频加热功率调制的大型螺旋装置。热通量和微脉动强度的响应与温度梯度变化的响应不同。这一结果违反了局部传输模型，其中湍流由局部温度梯度决定。建立了通量、梯度和湍流之间的新关系，提出了除温度梯度外，加热率作为湍流的一个新的直接控制参数，以解释湍流对加热功率周期性调制的快速响应。
We report observations of the dynamic response of micro-fluctuations and turbulent flux to a low-frequency heating power modulation in the Large Helical Device. The responses of heat flux and micro-fluctuation intensity differ from that of the change in temperature gradient. This result violates the local transport model, where turbulence is determined by the local temperature gradient. A new relationship between flux, gradient and turbulence is found. In addition to the temperature gradient, the heating rate is proposed as a new, direct controlling parameter of turbulence to explain the fast response of turbulence against periodic modulation of heating power.