Improved Surface Plasma Negative Ion Source
Abstract
The features of an improved a surface plasma source (SPS) with cesium catalysis for negative ion production are discussed. The advantages of semiplanotron SPS (BINP, Novosibirsk) with a drift of thin layer, high density plasma in crossed fields and hot cathode discharge SPS (SITEX, ORNL) with a magnetic field and low gas density have been combined in an optimized configuration. The form of the emitter surface is optimized for focusing of surface negative ions to emission hole. A supersonic jet of atoms will be used for cooling the surface negative ion flux by resonant charge-exchange. Rapid pumping of atoms directly into the source chamber will keep a low gas density and a low destruction of negative ions. Intense beams of hydrogen isotopes with temperatures less than 1 eV and emission current density up to 1 A/cm2 should be reached in a continuously operated SPS. Research sponsored by the LDRD Program of ORNL, managed by Lockheed Martin ER Corp. for the USDOE under Contract No. DE-AC05-96OR22464.
- Publication:
-
APS Meeting Abstracts
- Pub Date:
- May 1997
- Bibcode:
- 1997APS..PAC..6W07D