超导球在磁场中的受控运动——迈斯纳效应演示实验方案

CONTROLLABLE MOVEMENT OF A SUPERCONDUCTING BALL IN A MAGNETIC FIELD ——DYNAMIC DEMONSTRATION OF THE MEISNER EFFECT

用相互垂直的数个线圈构造空间磁场的极小值点 ,通过计算机改变线圈中的电流 ,使此极小值点做受控运动 ,从而实现通过悬浮于该处的超导球对迈斯纳效应的动态展示 .

Using several mutually perpendicular square coils it is possible to create a spatial minimum point of magnetic field where a magnetically suspended superconducting ball is located. A dynamic demonstration of the Meisner effect can then be achieved by controlling the currents through each coil.The principle and feasibility of this experiment are disscussed.