Quadrupole lens for dynamic focus and astigmatism control in an elliptical aperture lens gun
椭圆膜孔透镜电子枪中用作动态聚焦和象散控制的四极透镜
An Exact Electrostatic Quadrupole Lens with Square Boundaries
正方边界的静电四极场透镜
To calculate the transfer matrix in the fringe region of a quadrupole lens, three kinds of methods are used.
文中阐述了四极磁透镜边缘场的三种处理方法，用这三种方法计算了透镜的输运矩阵。
In this paper the equations of motion for charged particles in radio-frequency quadrupole lenses are studied, the transfer matrix elements are derived and the relations between the focusing properties of the lenses and the lens parameters are discussed.
研究了带电粒子在射频四极透镜中的运动方程，导出了传输矩阵元，讨论了透镜聚焦特性和透镜各参数间的关系。