带电粒子在非均匀磁场中运动的教学设计

从大学物理的教学目的出发，对带电粒子在轴对称非均匀磁场中的运动进行了教学设计．带电粒子在均匀磁场中的运动是基础，分析轴对称非均匀磁场的特点是重点、难点，磁约束概念的讲解是结果．所贯穿的教学方法是问题式的引导，设计的特点是：将物理学中经常用到的处理问题的方法“近似”巧妙地应用到“带电粒子在轴对称非均匀磁场中运动”的分析之中，使复杂问题简单化．

INSTRUCTIONAL DESIGN OF CHARGED PARTICLE MOVEMENT IN A NON-UNIFORM MAGNETIC FIELD

With the purpose of college physics teaching, this paper described the instructional design of charged particle movement in axisymmetric non-uniform magnetic field. With the fundamental knowledge of charged particle movement in a uniform magnetic field, the key difficult point was to analyze the characteristics of axisymmetric non-uniform magnetic field, which ended with the explanation of magnetic confinement concepts. Special feature of this instructional design was that the ＂approximation＂ method frequently used in physics was artfully introduced into the analysis of ＂charged particle movement in axisymmetric non-uniform magnetic field＂, thus significantly reduced complexity of this problem.