High-Current-Density Thermionic Cathodes and the Generation of High-Voltage Electron Beams

High-Current-Density Thermionic Cathodes and the Generation of High-Voltage Electron Beams

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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Herniter, Marc E, Lipscomb, George, Pearce, Kelly D
Format: Report
Sprache:eng
Schlagworte:
BORIDES
CATHODES
CURRENT DENSITY
DIODES
Electrical and Electronic Equipment
ELECTRON BEAMS
ELECTRON GUNS
EMISSION
GENERATORS
HIGH DENSITY
HIGH POWER
HIGH VOLTAGE
INTENSITY
LANTHANUM COMPOUNDS
MATERIALS
Particle Accelerators
SURFACES
THERMIONIC EMISSION
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Beschreibung
Zusammenfassung: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 deg 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. Keywords: LaB6, Lanthanum hexaboride, High-current density thermionic cathodes, High-voltage electron beams.