THE WORK FUNCTION OF FILMS EVAPORATED FROM URANIUM CARBIDE

Journal Article · Mon Oct 01 04:00:00 EDT 1962 · Proc. Phys. Soc. (London)

DOI:https://doi.org/10.1088/0370-1328/80/4/124· OSTI ID:4777475

Blott, B H; Hopkins, B J

Measurements of the collector work function during the early stages of the uranium carbide cathode life are reported. The variation with time of the collector work function as material evaporated from a cathode maintained at 1850 deg K is tabulated. The collector was Mo. In a second experiment, again with a Mo collector, the cathode temperature was increased to 2150 deg K, and the time scale was reduced. In the third experiment, a W collector was used and the results obtained were similar to those obtained in the first experiment. Finally, the formation of the film on the W surface was followed with the cathode maintained at 1770 deg K. It is concluded that even at temperatures as low as 1770 deg K within five minutes the collector surface becomes covered with a layer of material evaporated from the uranium carbide cathode, which produces a minimum work function of deg 3.0 ev. (L.T.W.)

• Research Organization: University of Southampton, Eng.
• NSA Number: NSA-17-000680
• OSTI ID: 4777475
• Journal Information: Proc. Phys. Soc. (London), Journal Name: Proc. Phys. Soc. (London) Vol. Vol: 80
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CATHODES
ELECTRODES
EVAPORATION
FILMS
LAYERS
LIFETIME
MEASURED VALUES
MOLYBDENUM
PHYSICS
SURFACES
TABLES
TEMPERATURE
TUNGSTEN
URANIUM CARBIDES
VARIATIONS
WORK FUNCTIONS