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首页> 外文期刊>Plasma physics and controlled fusion >Observation of heat transfer across x point of the islands during sawtooth crash on the HT-7 tokamak
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Observation of heat transfer across x point of the islands during sawtooth crash on the HT-7 tokamak

机译：在HT-7托卡马克锯齿形碰撞过程中观察岛上x点的传热

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摘要

It is observed that a large heat flow abruptly transfers across the x point (which can be located at both the high field side and the low field side) of the 1/1 or 2/2 magnetic islands during a sawtooth crash on the HT-7 tokamak by using tomography of the high-resolution soft-x-ray emission together with the singular value decomposition technique. Although the poloidally asymmetric heat flow contributes an m = 1 component of perturbation in the signals, the heat flow is obviously different from the growth of the m = 1 magnetic island. Furthermore, it is also shown that the large heat flow or the displacement of the hot core occurs only after the crash. Hence, the large displacement of the hot core is just a result of the crash rather than the cause. The heat flow from both the x points of them = 2 island is also observed. This observation demonstrates that a purely fast reconnection of the m = 1 magnetic island is not responsible for the crash, but that it may be due to the rapid energy and particle diffusion in the stochastic region.
机译：可以看出，在HT- 7托卡马克通过使用高分辨率软X射线断层扫描和奇异值分解技术来实现。尽管极向不对称热流在信号中贡献了m = 1的扰动分量，但该热流明显不同于m = 1磁岛的增长。此外，还显示出大的热流或热芯的位移仅在碰撞之后发生。因此，热芯的大位移仅仅是碰撞的结果，而不是原因。还观察到它们两个x点= 2岛的热流。该观察结果表明，m = 1磁岛的纯粹快速重新连接不是造成碰撞的原因，但是这可能是由于随机区域中的快速能量和粒子扩散所致。

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