Low background cold cathode ion source for molecular beam detection |
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Authors: | Faubel M Holber W M Toennies J P |
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Affiliation: | Max-Planck-Institut für Str?mungsforschung, 34 G?ttingen, Germany. |
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Abstract: | An extractor gauge type electron bombardment ion source using carbon fiber bundles as field electron emitters is described. The cold cathode permits operation of the ionizer within a liquid He cooled cryopump. The high pumping speed for all molecules (except helium) together with its low background pressure make this ion source a very promising detector for crossed molecular beam scattering experiments. |
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