New broad-beam alkali ion source for use in ultra high vacuum

Ilija Terzic, Momcilo M. Tosic, Jovan Elazar

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


A new broad-beam ion source of alkali (K+) ions for use in ultra high vacuum was designed, built and tested. The basic principles used have advantages over gas-fed broad-beam ion sources, because there is no need for differential pumping, and because an intrinsically pure ion beam obviates the necessity for charge-to-mass analysis. The source is based on the effect of thermionic emission of K+ ions from solid potassium aluminosilicate (K2O · Al2O3 · 2SiO2) emitter. An ion beam current of 0.4 mA has been achieved at an extraction voltage of 3.5 kV with 1.5 cm beam diameter. The degassed broad-beam ion source in operation does not appreciably influence the background pressure in the ultra high vacuum system.

Original languageEnglish
Pages (from-to)944-948
Number of pages5
JournalMeasurement Science and Technology
Issue number6
StatePublished - 1 Jun 1996
Externally publishedYes

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics


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