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本文导出了可用于研究含第二稳定区的环流器微观气球模的本征方程,其中保留了各种最重要的动力效应。对圆截面环流器,相应的本征方程中保留了对第二稳定区中模的特性有重大影响的磁面位移效应及极向场曲率效应。采用数值打靶法求解本征方程,详细分析了各种位形参数对模的结构及稳定性的影响。与理想磁流体理论结果对比,发现在第二稳定区参数范围内,存在一类新的弱不稳定模式。此外,在各种参数范围内都存在临界稳定模式。详细考察了这些模式的存在形式及结构,以及剪切和极向场参数对它们的影响。The kinetic ballooning-mode eigenequation, which can be used to study the stability criterion in the second stability regime, is derived. It retains various most important kinetic effects. The corresponding form of this equation for circular tokamak is deduced to include the effects of the magnetic surface displacement and the poloidal magnetic field that become important in the second stability regime. The structures of the modes and the stability criteria for various configuration parameters are studied by using a numerical shooting code. Compared to the ideal MHD case, it is found that a new unstable branch of the mode exists in the second stability regime, having a very weak growth rate. In addition, there are several sorts of marginal stable modes, their behaviours have been studied to examine the effects of the magnetic shear and the poloidal magnetic fields.
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