An rf driven ion source has been developed and tested at LBL for positive hydrogen ion production. Studies of this new source on ion species and current densities for a dc arc discharge are made in the 60hyphen;kV PSI ion source test stand and the results compared with those obtained using the rf discharge. This source, using both discharge modes, will be installed in the PSI Cockcroftndash;Walton preinjector to increase the 870hyphen;keV dc proton beam intensity from the present 8ndash;10 mA operation to about 25 mA.
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