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Chacon-Golcher, E.

Paper Title Page
TUPLT160 Development of a 25-mA, 12% Duty Factor (df) H- Source for LANSCE 1500
 
  • G. Rouleau, A. Arvin, E. Chacon-Golcher, E. Geros, G. Jacobson, J. Meyer, P. Naffziger, S. Schaller, J.D. Sherman, J. Stelzer, J. Zaugg
    LANL/LANSCE, Los Alamos, New Mexico
  
  Present operations at the Los Alamos Neutron Science Center (LANSCE) accelerator use a surface conversion source to provide 80-keV, 16 to 18-mA H- beams with typical rms normalized emittance of 0.13 (pmm-mrad). Operational flexibility of the 800-MeV linac and proton storage ring will be increased by a higher current H- source. The present goal is to achieve a 25-mA H- surface converter source with modest (10-20%) emittance increase without sacrificing the present LANSCE production source 12% df and 28 day lifetime. The LANSCE 80-kV ion source test stand (ISTS) has been brought into reliable 24-hour per day operation with computer control and modern electronics. A fourth production source has been fabricated, and is now operating on the ISTS. H- currents up to 25mA have been observed with 0.15 to 0.18(pmm-mrad) rms normalized emittances. An experimental study of surface converter geometries and electron filters at the emitter electrode are planned to optimize source current and emittance.