MEVVA ION-SOURCE FOR THE ITEP SYNCHROTRON

A MEVVA (metal vapor vacuum arc) ion source has been made and tested a t the Institute of Theoretical and Experimental Physics (ITEP), Moscow . The ions are created in the plasma formed from the cathode metal vap or of a vacuum arc discharge. An ion beam current of about 200-400 mA in repetitively triggered pulses of width 0.1 ms has been obtained. Th e ion charge state distributions have been measured for seven elements (Be,C,Al,Fe,Cu,Zr,W) and they are in reasonable agreement with result s of other workers. The MEVVA ion source is simple to operate and has a reliability acceptable for use as an ion source for ITEP synchrotron injection.