Electron tube with reduced secondary emission

Details Electron tube with reduced secondary emission Electron tube with reduced secondary emission

1979-03-05

1980-11-11

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

313106, 313107, 427 77, H01J 2308

Patent

active

042335396

ABSTRACT:
Secondary electrons emitted from an electron-collecting electrode of a vacuum tube degrade the performance. Emission of high-speed secondaries is reduced by coating the electron-collecting surface with a material of low atomic number. Emission of low-speed secondaries is a less predictable function of the surface material and structure. The invention comprises a coating of aluminum boride or similar substance, which has low secondary emission and is also easy to outgas.

REFERENCES:
patent: 2171230 (1939-08-01), Wamsley
patent: 2516841 (1950-08-01), Arditi et al.
patent: 2821496 (1958-01-01), Perl
patent: 2990495 (1961-06-01), Spencer
patent: 3389285 (1968-06-01), Thomson
patent: 3936695 (1976-02-01), Schmidt

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