实际Paul阱的电参量计算

CALCULATION OF ELECTRIC PARAMETERS OF AN ACTUAL PAUL TRAP

用边界元方法，计算了实际Ｐａｕｌ阱，当存在开孔和轴向装配误差时环帽极的面电荷密度及阱的电容值，给出了它们随孔径大小变化的规律，从而为实验中选择孔径的大小提供了理论依据。

A trap fo charged particles is an important tool in many important experiments in atomic physics. The capacitances of many such traps deviate from the ideal quadrupole capacitances by holes in the ring and cap electrodes. The charge distribution and capacitances of non linear ion traps were calculated by using a general analytical method. The results could be useful for ion trap design and calculation of the dynamic parameters of ion cloud.