1989•OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)Requires access
High-current-density thermionic cathodes and the generation of high-voltage electron beams. Final technical report, 1 September 1982-30 April 1989
Marc Herniter, G.A. Lipscomb, K.D. Pearce
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Abstract
The project entitled High-Current-Density Thermionic Cathodes and High Voltage Electron Beams From Thermionic Cathodes is aimed at developing a thermionic cathode of high current density for use intense electron-beam generators. The emitting material under study is lanthanum hexaboride (LaB6). The project breaks down into 3 major parts: development of methods for heating LaB6 disks to the emission-temperature range of 1800{degree}C; measurement of the emission-current distribution over the cathode surface and correlation with thermionic-emission theory; and design and testing of an electron-gun diode with an LaB6 cathode which would be a prototype for use in an intense beam generator.