Title :
Production of Negative Helium Ions by Nearly-Resonant Charge Exchange in Potassium
Author :
Ennis, R.M., Jr. ; Schechter, D.E. ; Thoeming, G. ; Schlafke, D.B. ; Donnally, B.
Author_Institution :
ORTEC Incorporated, Oak Ridge, Tennessee
fDate :
6/1/1967 12:00:00 AM
Abstract :
The design criteria for a source of 5-10¿A of He- ions suitable for tandem accelerator application have been investigated. The process used is a nearly-resonant charge exchange between He+ ions, from a duoplasmatron, and potassium vapor. In the He+ energy range of 5-25 keV, the He-/He+ yield has been measured as a function of He+ energy. Yields of ~2%/ have been observed. A He- beam emittance of 1.2 × 10-2 cm rad eV1/2 has been measured. The potassium flux into the system was found to be ~1016 particles/s.
Keywords :
Energy measurement; Helium; Ion accelerators; Lakes; Lenses; Magnetic analysis; Magnetic flux; Optical collimators; Production; Temperature;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.1967.4324526
