Purity of He(23S) beams produced by coaxial electron impact sources

Purity of He(23S) beams produced by coaxial electron impact sources

Under certain operating conditions a helium metastable atom source based on coaxial electron impact excitation is observed to produce a beam that comprises principally fast neutral, rather than metastable, atoms. Implications of this are discussed.

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Bibliographische Detailangaben
Veröffentlicht in:Rev. Sci. Instrum.; (United States) 1982-02, Vol.53 (2), p.257-258
Hauptverfasser: Onellion, M., Riddle, T. W., Dunning, F. B., Walters, G. K.
Format: Artikel
Sprache:eng
Schlagworte:
640301 - Atomic, Molecular & Chemical Physics- Beams & their Reactions
ANNULAR SPACE
ATOMIC BEAMS
BEAMS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONFIGURATION
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FERMIONS
FLUIDS
GASES
HELIUM
LEPTONS
MATHEMATICAL MODELS
METASTABLE STATES
NONMETALS
RARE GASES
SPACE
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Beschreibung
Zusammenfassung:Under certain operating conditions a helium metastable atom source based on coaxial electron impact excitation is observed to produce a beam that comprises principally fast neutral, rather than metastable, atoms. Implications of this are discussed.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1136949