Calculation of H-wave accelerating structures using qusistatical approximation

H-wave accelerating structures are used in linear resonance ion accelerators with the accelerating field focusing. H-structures formed by a beam of cylindrical canonical waveguides connected by a narror longitudinal irregular slit and short-circuited at the ends by short cylindrical edge regions are considered. H-waves in such structures have localized in a slit (the accelerating channel region) electric component and magnetic component distributed along the waveguide section. When the slit is narrow the field near the channel is described by a scalar potential function (quasistatic approximation), and in partial regions (waveguides) - by one proper function. E-wave contribution is neglected. Using potential function the channel length static parameters - partial capacitances and inductions are determined in the slit. The suggested quasistatic approximation for H-structures permits an easy estimation of the lower spectral part and to investigate the effect of parameters on longitudinal distibution of field