Acceleration of heavy ion beams by means of direct injection into RFQ Linac

A heavy ion source based on a new principle of direct plasma injection system was developed at Tokyo Institute of Technology. This heavy ion source combines directly a laser ion source and a radio frequency quadrupole (RFQ) LINAC. We carried out an acceleration test of carbon ions on this source and proved this principle. An observed total carbon beam current of 8 mA at 214 keV/u was observed. Beam analysis using a bending magnet downstream of the RFQ LINAC showed that accelerated beam includes 4.0 and 0.8 mA C4+ and C3+, respectively.