SECONDARY ELECTRON EMISSION OF TUNGSTEN, TANTALUM, AND YTTRIUM OXIDE IN THE PRESENCE OF THERMAL EMISSION CURRENT

Journal Article · Sun Sep 01 04:00:00 EDT 1963 · Soviet Phys.-Solid State (English Transl.)

OSTI ID:4630525

Shul'man, A R; Morozov, Yu A; Petrov, I N

ABS>The results of measurements on the secondary electron emission coefficient, sigma , as a function of the energy V/sub p/ of the primary electrons, of the target temperature, and of the length of the primary current pulses for Ta, W, and Y/sub 2/O/sub 3/ are presented. It is shown that, for the materials investigated, the thermal emission current has no effect on the form of the secondary current pulse. The value of sigma is independent of the temperature for metals, and decreases with increase in temperature for yttrium oxide. It was concluded that, having a thermal emission current and high temperatures is a necessary, but not sufficient condition for the occurrence of anomalies in the secondary emission at high temperatures, and that the anomalies come from the specific properties of barium oxide (oxide cathode). (auth)

• Research Organization: Leningrad Polytechnic Inst.
• NSA Number: NSA-17-037546
• OSTI ID: 4630525
• Journal Information: Soviet Phys.-Solid State (English Transl.), Journal Name: Soviet Phys.-Solid State (English Transl.) Vol. Vol: 5
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BARIUM OXIDES
CATHODES
CURRENTS
ELECTRONS
EMISSION
ENERGY LEVELS
MEASURED VALUES
METALS, CERAMICS, AND OTHER MATERIALS
TANTALUM
TEMPERATURE
THERMIONICS
TUNGSTEN
YTTRIUM OXIDES