Some characteristics of tungsten filaments operated as cathodes in a gas discharge
- 1 March 1979
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 50 (3) , 356-361
- https://doi.org/10.1063/1.1135827
Abstract
Some physical properties of tungsten filaments, when operated as cathodes in a gas discharge, are presented. For a 0.1524-cm-diam tungsten wire, the initiation of a discharge is found to be dependent on the filament geometry. The effect of connecting the discharge power supply to either the positive or negative leg of the filament is examined. When the emission current becomes a sizable fraction of the filament heater current, the filament does not emit uniformly. The temperature distribution indicates that the majority of the electrons are emitted from the negative leg of the filament.Keywords
This publication has 4 references indexed in Scilit:
- The double sheath associated with a hot cathodeProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1976
- Structure of the Double Sheath in a Hot-Cathode PlasmaJournal of Applied Physics, 1965
- The Interaction of Electron and Positive Ion Space Charges in Cathode SheathsPhysical Review B, 1929
- Currents Limited by Space Charge between Coaxial CylindersPhysical Review B, 1923