OPTIMIZATION OF U(4-SOURCE() OUTPUT OF THE MEVVA ION)

The quadruply charged U4+ ion component of the uranium ion beam produc ed by the Institute for Theoretical and Experimental Physics MEVVA ion source has been investigated and increased. An independent, additiona l power supply has been connected to the trigger electrode, by means o f which the U4+ current was increased up to 30%-40% of the total beam current at the injector output. The charge state distribution was meas ured by time-of-flight and magnetic analysis methods. An accelerated U 4+ ion beam with a mean pulse current up to 50 mA in the bunch has bee n obtained at the TIPr-1 linac. (C) 1996 American Institute of Physics .