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“带电粒子在匀强磁场中的运动”课时教学的重点聚焦在质谱仪原理这一理论的探究上。从教材编排体系来讲,通过洛伦兹力演示仪这一实验现象的观察获取磁回旋这一客观物理事实,再通过体验性探究认识质谱仪测量的原理,从而获得磁回旋半径R=mv/qB和周期公式T=2πm/qB的推导。体验运动电荷通过静电场加速再经过匀强磁场的磁回旋先后两个物理过程,这为多次的静电场加速和递进的磁回旋物理过程做好铺垫。
“The movement of charged particles in uniform magnetic field ” class teaching focuses on the theory of mass spectrometry theory. From the teaching material arrangement system, through the observation of Lorentz force demonstrator this experimental phenomenon to obtain the objective physical facts of the magnetic cyclotron, and then through the understanding of the principle of mass spectrometry to explore the principle of magnetic resonance radius R = mv / Derivation of qB and period formula T = 2πm / qB. Experiencing two physical processes after experiencing the movement charge through the electrostatic field accelerating and then passing through the magnetic flux of the uniform magnetic field, this paves the way for the multiple electrostatic field accelerations and the progressive magnetic cyclotronics.