Transverse Coupling Impedance of a Simplified Ferrite Kicker Magnet Model

We derive the horizontal and vertical transverse impedance of a ferrite kicker magnet with rectangular aperture. The method is similar to the one developed recently to compute the longitudinal impedance of the same structure. One of the main features is the introduction of an infinite set of image current sources that satisfy the boundary conditions at the lateral conductors of the magnet. The impedance is computed with the help of field coefficients that are determined with the technique of field matching at the vacuum-ferrite boundary. Numerical results for the MKE kicker in the SPS are presented.