利用保罗机械阱探究囚禁粒子的动力学特性

摘要

Using the motion video analysis software Logger Pro ,the motion of particles in self‐made rotating‐saddle trap was analyzed ,and different motion states were shown .The critical value of neutral stability was 2q=0 .989 .The particles were bound in girdle in the stable state ,and q and vigor coefficient were positively correlated .The destabilization of the particle appeared to obey an exponen‐tial rule ,and in the late phase of the motion ,obvious destabilization caused by friction force occurred .%在自制保罗机械阱上利用运动视频分析软件Logger Pro分析囚禁粒子的运动轨迹，形象地展现了囚禁粒子在势阱中的不同运动状态．实验测得失稳临界值2 q＝0．989．稳定条件下粒子被束缚在环形带中，且 q与跃动系数正相关．粒子失稳按指数规律变化，在运动后期，摩擦力导致的失稳明显显现．