带电粒子在交变电场中由于受到的电场力作周期性变化,从而引起粒子做往复运动.1.带电粒子进入电场时的方向跟电场方向平行时,带电粒子在交变电场力的作用下,做加速、减速交替的直线运动,通常运动用动力学分析求解. Charged particles in the alternating electric field due to periodic changes in the electric field force, causing the particles to do reciprocating motion. 1. Charged particles into the electric field when the direction is parallel with the direction of the electric field, the charged particles under the action of the alternating electric field force, do Accelerate and decelerate alternate linear motions, usually by dynamic analysis.