Results of RF-tuning of the LUMF accelerating sections

Technique and results of radiotechnical tuning of accelerating sections in the high-energy part (100-600 MeV) of the Moscow meson factory linear accelerator are presented. The accelerator comprises 110 sections of the structure with conducting washers and diaphragms. The tuning presupposes two main stages: the tuning of frequency characteristics and flattening of the accelerating field distribution over the section length. Frequency tuning is performed in two-three steps by the washer diameter decrease. The accelerating field flattening is attained by the displacement of all washers in the longitudinal direction at the expense of a slight deformation of the rods. Results of the linear accelerator radiotechnical tuning have shown that all the accelerating sections satisfy the requirements and are ready for operation