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Welton, R.F.

Paper Title Page
THPEC072 High Brightness Surface Plasma Sources of Negative Hydrogen Ions 4223
 
  • V.G. Dudnikov, R.P. Johnson
    Muons, Inc, Batavia
  • M.P. Stockli, R.F. Welton
    ORNL, Oak Ridge, Tennessee
  
 

Development of novel modifications of H- source designs is proposed. The new source will be an advanced version of a Penning DT SPS (Dudnikov-Type Penning Surface Plasma Source) which will generate brighter beam in noiseless discharge, deliver up to 20 mA average current with better electrode cooling using new materials, and have longer lifetime, fast beam chopping capability, and reduced cesium loss.

  
THPEC073 RF H- Ion Source with Saddle Antenna 4226
 
  • V.G. Dudnikov, R.P. Johnson
    Muons, Inc, Batavia
  • G. Dudnikova
    UMD, College Park, Maryland
  • M.P. Stockli, R.F. Welton
    ORNL, Oak Ridge, Tennessee
  
 

In this project we are developing an RF H- surface plasma source which will synthesize the most important developments in the field of negative ion sources to provide high pulsed and average current, high brightness, good lifetime, high reliability, and higher power efficiency. We describe two planned modifications to the present SNS external antenna source in order to increase the plasma density near the output aperture: 1) replacing the present 2 MHz plasma-forming solenoid antenna with a 13 MHz saddle-type antenna and 2) replacing the permanent multicusp magnetic system with a weaker electro-magnet. Progress of this development will be presented.