The results of a reduced magnetohydrodynamic model for the interchange mode in a stellarator are reported. The model is based on Strauss equations, with the addition of resistivity, viscosity and perpendicular heat conductivity on the one hand, and ion and electron diamagnetic effects on the other hand. The ideally unstable and stable mode growth rate and frequency are studied. The main result is that the ideally unstable mode can rotate in the electron direction even in the absence of electron diamagnetic effects, due to a linear bifurcation caused by the heat conductivity. The presence of the bifurcation is explained analytically. The diamagnetic effects can be destabilizing. For the ideally stable (resistive) mode, we find that the presence of viscosity and heat conductivity causes rotation in the electron direction in the case where .
恒星器中互换模的约化磁流体动力学模型研究结果被报告。该模型基于Strauss方程，并分别加入了电阻率、黏性以及垂直热导率，同时考虑了离子和电子的反磁性效应。研究了理想不稳定和理想稳定模的增长率与频率。主要结果表明，即使在没有电子反磁性效应的情况下，理想不稳定模也能因热导率引起的线性分岔而沿电子方向旋转。该分岔的存在已通过解析方法加以解释。反磁性效应可能具有去稳定作用。对于理想稳定（电阻性）模，我们发现在特定条件下，黏性和热导率的存在会导致模沿电子方向旋转。