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本文分析了任意截面环电流器(托克马克)的局部稳定条件,得到了一个一般的近似判据βc,η为纵磁阱。由此我们讨论了多极场对等离子体磁阱和剪切的影响。指出,对于椭圆截面环电流器,引入小的三角场及八极场是改善稳定性的强有力手段。The local stability of the Tokamak is discussed and a general approximate criteria β c obtained, where η is the longitudinal magneticwell. Furthermore, the influence of multipole' fields on the longitudinal magnetic well and the magnetic shear is discuss. It is observed that small triangular and octopole field components may considerably stabilize a Tokamak of elliptical cross-section.
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