Bevatron local injector duoplasmatron ion source performance

Performance tests of the Bevatron local injector duoplasmatron ion source using singly charged particles of helium and deuterium are described. Initial measurements of the 8.4-keV/nucleon helium 1+ beam and deuterium 1+ beams indicated intensities of 12 particle mA and 8 particle mA, respectively. The low-energy beam transport line uses a tape-wound solenoid and an x-y dipole for matching into the 200-MHz RF quadrupole (RFQ) linac. A beam profile monitor and Faraday cup are located in the diagnostic box pumping manifold assembly. The computer control system, the AC distribution network, and pulsed gas control system are similar to those of the local injector PIG source in that they are housed in an insulated four bay rack in a room directly above the source. The source lifetime of 150 h is governed by the evaporation rate of the 1-mm diameter tantalum filament, and is increased to several months during operation with the directly heated lanthanum hexaboride filament