A strongly focusing high-intensity He+ ion source has been designed and constructed as a beam source for a high-energy He0 beam probe system for diagnosis of fusion produced alpha particles in the thermonuclear fusion plasmas. The He+ beam was extracted from the ion source at an acceleration voltage of 18-35 kV. Temperature distributions of the beam target were observed with an IR camera. The 1e -holding beam profile half-width was about 15 mm at optimum perveance (Perv) of 0.03 (Ibeam =2.4 A). A beam current about 3 A was achieved at an acceleration voltage of 26.7 kV with an arc power of 10 kW (Perv=0.023).
ASJC Scopus subject areas