Enhanced secondary electron emitter

Details Enhanced secondary electron emitter Enhanced secondary electron emitter

1989-03-31

1990-12-04

Mullins, James B.

Amplifiers

With secondary electron emission tube amplifying device

313311, 313346R, 330 47, 445 50, 445 51, H03F 354, H01J 132, H01J 904

Patent

active

049756567

ABSTRACT:
The present invention discloses an enhanced secondary electron emitter cathode suitable for use in a typical crossed-field amplifiers. The emitter surfaces of the cathode are formed into protuberances or knurls. The cathode's secondary emission characteristics are enhanced by providing protuberances with more surface area for electrons to bombard and for electrons to be emitted from. The protuberances increase the variety of angles of incidence of bombarding electrons thereby increasing the probability that bombarded electrons can escape the cathode's surfaces.

REFERENCES:
patent: 3255422 (1966-06-01), Feinstein et al.
patent: 3619709 (1971-11-01), Dudley et al.
patent: 3998678 (1976-12-01), Fukase et al.
patent: 4260665 (1981-04-01), Aida et al.
patent: 4700109 (1987-10-01), MacPhail
Jepsen, R. L., and Muller, M. W., entitled "Enhanced Emission From Magnetron Cathodes", Journal of Applied Physics, Sep., 1951, vol. 22, No. 9, pp. 1196-1207.

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