Upgrade of Heavy Ion Injector for ITEP-TWAC Facility

A new scheme of heavy ion injector I-3 designed for improvement of accelerated beam parameters has been proposed for ITEP-TWAC Facility. It is based on the usage of two quarter-wave double gap resonators operated on 5 MHz with accelerating voltage of 3 MV per gap. Existing 2.5 MHz double gap resonator will be retuned for operational frequency of 5 MHz and new additional one will be built. The new injector optimized for acceleration of heavy ions with A/Z in the range of 3-10 will allow accelerating any ions from C to U with beam current up to10 mA. Results of both electrodynamics and beam dynamics simulations of the accelerating structures are presented.