DEVELOPMENT OF LINEAR ACCELERATORS AS INJECTORS FOR MEDICAL ACCELERATORS IN IHEP-PROTVINO
Yu. Budanovª, O. Belyaev, I. Zvonarev, A. Maltsev, E. Mazurov, S. Strekalovskyh, V. Teplyakov
Institute of High Energy Physics, Protvino, Russia
Advantage of use of the accelerated ions to the medical purposes has been proved in the middle of the last century. However, only recently this idea began to be used widely in applied medicine. It became possible owing to qualitative development of accelerating technique. An essential role in invention and a practical realization of acceleration and focussing of ions in systems with high-frequency quadrupole focussing (RFQ) here has played. In IHEP first-ever such accelerator has been implemented, and then some more various accelerators with RFQ  have been produced. RFQ application as an initial part of the accelerator now is applied in the in most cases of accelerators of ions to the medical purposes all over the world. In IHEP accelerators with drift tubes and simultaneous use of high-frequency focusing RFQ DTL also are developed and put into operation. Application RFQ DTL is practically realized for acceleration of protons up to 30 MeV .
Now in IHEP working on creation of two accelerators with use RFQ for the medical purposes are carried out. In the report theoretical calculations, sketches and design decisions for projects of these accelerators are submitted. The accelerator of carbon ions up to energy 286 keV/u is intended for injection of carbon ions in existing accelerator I-100 according to medical ion IHEP program. This accelerator will represent section RFQ with application of a special structure of electrodes and radio engineering division into two subsections, providing work of second subsection RFQ as debuncher. Other accelerator for protons with energy 5 MeV is planned as injector in the ring accelerator for the center of proton-beam therapy of Botkin's hospital (Moscow). The accelerator will consist of two sections, in first section is used conventional RFQ, in the second section the RFQ DTL structure is applied. Sections are planed on the basis of resonators with a longitudinal magnetic field.
ª – corresponding author