To the calculation of the H-wave structure with end region

Low-energy ion linear accelerator H-resonator parameters were investigated theoretically and experimentally. Using modification of partial region method, where finite element method is used for determination of normal waves, in every subregion the solution of three-diminsional problem is being constructed. Dependences of frequency, proper Q-factor and relative losses at flanges for operating oscillation on front region length were measured. For structures with spatial-uniform quadropole RF-focusing the technique allows to remove restrictions for cross section configuration and to take into account the front region - basic element within the structure with longitudinal magnetic field