Duo Plasmatron Ion Source for Use in Accelerators

摘要: Evaluations of various sources for accelerator use at proton currents above 10 ma indicate that a variation Von Ardenne's Duo Plasmatron will give performance superior to any other source presently available. Operating characteristics sizes the have been examined H1+, H2+, H3+, H1−, He+, and He++ ions electrons. Experience with protons in current range from 1 30 indicates can deliver up 100 amp/cm2 exit aperture area. Current densities such as this cannot be maintained accelerator‐extractor section because space charge forces, even highest gradients normally available well‐polished electrodes vacuum; thus it said space‐charge‐limited by rather than emission‐limited source. Operation He+ electrons is similar operation. Currents 11 μa H1− 5 were extracted directly which had designed several milliamperes. The most striking features are its remarkably high brilliance, gas efficiency, good power economy, compactness.