Study of the four-chamber H-resonator

Investigations of experimental models of the four-chamber resonator for accelerating section of a linear accelerator with spatially-homogeneous quadrupole focusing are described. The approximate method of estimation of eigen frequency of an infinitely long resonator is described. Eigen frequencies of resonators are measured. Two methods of suppression of revealed dipole oscillation modes are compared experimentally: by antidipole plates in the face part of the resonator and by bonds in chambers. The difficulty of compensation of magnetic field drop at resonator ends is pointed out