Electron gun for convergent beam, and a device, particularly a v

Details Electron gun for convergent beam, and a device, particularly a v Electron gun for convergent beam, and a device, particularly a v

1981-05-07

1984-12-04

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural concentrating, accelerating, and/or de-accelerating...

313449, 313424, H01J 2946, H01J 2956

Patent

active

044866879

ABSTRACT:
For reducing as much as possible the dimension of converging electron beams, at their point of minimum section, the invention provides in this zone an ionic charge counterbalancing the space charge of the beam, by means of an equipotential electrode disposed about this point. Said electrode is the tube in the figure. When further modulation is applied to the beam, the electrode which ensures it is placed after it in the path thereof.

REFERENCES:
patent: 3141993 (1964-07-01), Hahn
patent: 3904913 (1975-09-01), Spencer
patent: 3924153 (1975-12-01), McIntyre
patent: 4009410 (1977-02-01), Pommier et al.
patent: 4044282 (1977-08-01), Balandin et al.
patent: 4268777 (1981-05-01), Van Roosmalen
Positive Ion Trapping in Electron Beams, E. L. Ginzton and B. H. Wadia, Proceedings of the IRE.

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