Transition between internal transport barriers with different temperature-profile curvatures in JT-60U tokamak plasmas
Transition between internal transport barriers with different temperature-profile curvatures in JT-60U tokamak plasmas
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DOI：
10.1103/physrevlett.101.055003
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发表时间：
2008-08-01
影响因子：
8.6
通讯作者：
Kamada, Y.
中科院分区：
文献类型：
--
作者：
Ida, K.;Sakamoto, Y.;Kamada, Y.
在JT-60 U托卡马克负磁剪切等离子体中，在磁剪切的稳态阶段观察到了具有内输运势垒的等离子体两态之间的自发跃迁现象。这两个ITB状态的特征在于由ITB区域内的离子温度的二阶径向导数的不同轮廓（一个具有弱凹形状，另一个具有强凸形状）和由L模式和ITB区域之间的界面的不同锐度程度，这由到ITB区域中的湍流穿透确定。
A spontaneous transition phenomena between two states of a plasma with an internal transport barrier (ITB) is observed in the steady-state phase of the magnetic shear in the negative magnetic shear plasma in the JT-60U tokamak. These two ITB states are characterized by different profiles of the second radial derivative of the ion temperature inside the ITB region (one has a weak concave shape and the other has a strong convex shape) and by different degrees of sharpness of the interfaces between the L mode and the ITB region, which is determined by the turbulence penetration into the ITB region.