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首页> 外文期刊>Plasma physics and controlled fusion >Suppression of MHD instabilities by ion Bernstein wave (IBW) heating in the HT-7 tokamak
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Suppression of MHD instabilities by ion Bernstein wave (IBW) heating in the HT-7 tokamak

机译：HT-7托卡马克中离子伯恩斯坦波（IBW）加热抑制MHD不稳定性

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摘要

In the HT-7 tokamak, the m = 2 = 1 tearing mode can be effectively suppressed by the ion Bernstein wave (IBW) when the location of power deposition is near the q = 2 rational surface. Off-axis electron heating and electron density broadening have been observed. In the meantime, the particle confinement is improved with an increase in electron density and a drop in Dα emission. The induced large electron density gradients and electron pressure gradients can be spatially correlated with the IBW deposition profile via theoretical calculation. It is suggested that off-axis IBW heating modified the electron pressure profile and the current density profile can be redistributed, thus resulting in the suppression of the magnetohydrodynamics (MHD) instability. It provides an integrated way for both the stabilization of tearing modes and controlling pressure profiles.
机译：在HT-7托卡马克中，当功率沉积的位置靠近q = 2有理面时，离子伯恩斯坦波（IBW）可以有效地抑制m = 2 / n = 1的撕裂模式。已经观察到离轴电子加热和电子密度加宽。同时，随着电子密度的增加和Dα发射的降低，粒子的约束得到改善。可以通过理论计算将感应的大电子密度梯度和电子压力梯度与IBW沉积轮廓空间相关。建议离轴IBW加热修改了电子压力曲线，并且可以重新分配电流密度曲线，从而抑制了磁流体动力学（MHD）的不稳定性。它为稳定撕裂模式和控制压力曲线提供了一种集成方式。

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