National Institute for Fusion Science, Toki, Gifu, Japan.
Phys Rev Lett. 2012 Aug 10;109(6):065001. doi: 10.1103/PhysRevLett.109.065001. Epub 2012 Aug 7.
A peaked ion temperature profile is observed inside the magnetic island during mode locking after the back transition from H mode to L mode in JT-60U. The thermal diffusivity evaluated inside the magnetic island is 0.1 m(2)/s, which is much smaller than that outside the magnetic island by an order of magnitude. The present experiment gives clear evidence that ion heat transport inside a magnetic island can bifurcate and the transport level can be suppressed to the very low level associated with the strong flow shear at the boundary.
在 JT-60U 中，从 H 模向后过渡到 L 模后，在磁岛内观察到尖峰离子温度剖面。在磁岛内评估的热扩散率为 0.1 m(2)/s，比磁岛外小一个数量级。本实验清楚地表明，磁岛内的离子热输运可以分叉，并且输运水平可以被抑制到与边界处强流剪切相关的非常低的水平。
