带电粒子垂直进入有界匀强磁场中,由于受洛伦兹力作用,故粒子做匀速圆周运动,其速度方向会不断地发生变化,根据这一特点,人们可以设计特定的有界磁场来控制带电粒子的运动,以达到某种预期的目的。1.磁场对单个粒子的控制单个带电粒子进入匀强磁场中发生偏转,如果粒子的初、末速度方向均已知,我们可以设计磁场来实现这样的偏转。 The charged particles enter the bounded uniform magnetic field vertically. Because of the Lorentz force, the particles move at a constant speed and their speed direction changes continuously. Based on this feature, one can design a specific bounded magnetic field to control. The movement of charged particles to achieve some desired purpose. 1. Control of individual particles by a magnetic field A single charged particle is deflected into a uniform magnetic field. If the initial and final velocity directions of the particles are known, we can design the magnetic field to achieve such deflection.