Low-energy, electron-spin-polarized 4He+ ion source

Academic Article


  • A source of low-energy, electron-spin-polarized 4He+ ions based on an optically pumped, rf-excited helium discharge is described. Ion polarizations P+ of ∼0.13 are achieved at beam currents of ∼0.1 nA, decreasing to ∼0.09 at currents of ∼0.5 nA. Ion beam energies as low as 10 eV have been realized, with an energy spread of ≲ 3 eV full width half maximum. The ion polarization can be reversed (P+ → -P+) simply by changing the sense of circular polarization of the optical pumping radiation. The source is suitable for use in a wide variety of applications including surface physics studies. © 1998 American Institute of Physics.
  • Published In

    Digital Object Identifier (doi)

    Author List

  • Bixler DL; Lancaster JC; Popple RA; Dunning FB; Walters GK
  • Start Page

  • 2012
  • End Page

  • 2016
  • Volume

  • 69
  • Issue

  • 5