The ring resonator use the the power packed klystrons for the accelerators of the industrial and therapeutic purposes

Beginning with 1986 year the SR&PC "Toriy" produces the multi-beam klystrons (MBK) of packed design that are intended to use in the electron accelerator apparatus (EA) of the industrial and medical purposes. The distinctive features of these MBK are the low voltage and reverse focusing system with packed permanent magnets. The enumerated distinctive features predetermine the necessity to use a big number of the electron beams (40) and make impossible to employ the traditional toroidal resonators because of the substantial radial irregularity over the interaction gap field. So, the ring resonators (RR), which are the coiling wave-guide of the H- or II-like cross-section, are employed in the klystrons