Study of direct-current, pulsed, and temperature--field emission from LaB/sub 6//tungsten field emitter

Journal Article · Sat Jul 01 00:00:00 EDT 1989 · J. Vac. Sci. Technol., A; (United States)

DOI:https://doi.org/10.1116/1.575782· OSTI ID:5931884

Khairnar, R S; Dharmadhikari, C V; Joag, D S; Kanitkar, P L; Nigavekar, A S

This paper reports dc, temperature--field (/ital T/--/ital F/), and pulsed emission from a lanthanum hexaboride (LaB/sub 6/)--tungsten (W) field emitter. Various parameters are drived from the Fowler--Nordheim plots for the three configurations of the emitter, viz., clean tungsten, LaB/sub 6/ overgrowth on W(111) plane (''two spot''), and LaB/sub 6/ equilibrated W surface (''well spread''). The current stability is observed at 300, 730, and 850 K, (and 1065 K for well spread) under /ital T/--/ital F/ operation. A comparison is made with various types of field emitting cathodes and the results are discussed from the point of view of LaB/sub 6//W field emitting cathodes.

• Research Organization: Department of Physics, University of Poona, Pune-411 007, India(IN)
• OSTI ID: 5931884
• Journal Information: J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. 7:4; ISSN JVTAD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
BORIDES
BORON COMPOUNDS
CATHODES
CURRENTS
DIRECT CURRENT
ELECTRIC CURRENTS
ELECTRODES
ELECTRON SPECTRA
ELEMENTS
EMISSION
FIELD EMISSION
FUNCTIONS
HIGH TEMPERATURE
LANTHANUM BORIDES
LANTHANUM COMPOUNDS
MEDIUM TEMPERATURE
METALS
PULSES
RARE EARTH COMPOUNDS
SPECTRA
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
TUNGSTEN
VERY HIGH TEMPERATURE
WORK FUNCTIONS