Thermal Ionization at Hot Metal Surfaces
Abstract
Ionization on hot tungsten, tantalum, and rhenium surfaces was studied. An atomic beam of neutral atoms effused from a Knudsen-type effusion vessel and struck a hot filament of the metal being studied. A temperature- dependent fraction of these atoms was ionized. This filament served as the ion source of a 60-degree-sector single-directional focusing mass spectrometer. According to the Saha-Langmuir theory of surface ionization the temperature dependence of ionization is related to the difference between the ionization potential of the impinging atom and the work function of the surface under consideration.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1958
- Accession Number
- ADA280294
Entities
People
- Joseph R. Werning
Organizations
- University of California, Berkeley