Development of microwave ion source and low energy beam transport system for high current cyclotron

A 2.45GHz microwave ion source and a low energy beam transport system have been developed to study the high intensity proton beam injection into a 10MeV, 5mA compact cyclotron. We have extracted proton beam more than 10mA at 80kV as measured by the DCCT after the extraction and a well collimated beam of 7mA (through 1cm×1cm slit) at the faraday cup 1.5m away from the source. The transport of protons from the ion source in the presence of H2+, H3+ species has been studied using PIC simulations through our transport line which consists of two solenoids. We have also installed a small dipole magnet with similar field as that of the cyclotron along with vacuum chamber, spiral inflector and few diagnostic elements at the end of the beam line. In the preliminary testing of inflection, we achieved 1mA beam on the faraday cup at the exit of inflector with ∼60% transmission efficiency.