Abstract: The fourth-order Ｒunge-Kutta method is used to calculate the trajectories of electrons under different cathode and anode radii in orthogonal electromagnetic fields．The calculation results show that when the cathode radius is small，the electrons perform a "figure 8" rotation curve motion，and when the cathode radius is large，it shows an approximate semicircular bounce motion behaviour．The larger the cathode radius，the greater the radius of curvature of the electron's motion curve near the anode．The larger the anode radius，the smaller the radius of curvature of the curve of the electron near the anode．This numerical simulation experiment not only visually shows the motion behaviour of electrons，but also makes up for the limitations of solid experiments in controlling parameter changes．
苏亚凤, 陈贺胜, 王 兴. 电极半径对正交电磁场中电子运动的影响[J]. 大学物理实验, 2025, 38(5): 18-22.
SU Yafeng, CHEN Hesheng , WANG Xing . Influence of Electrode Ｒadius on Electron Motion in Orthogonal Electromagnetic Fields. Physical Experiment of College, 2025, 38(5): 18-22.
