X-Ray tube grid bias supply

Details X-Ray tube grid bias supply X-Ray tube grid bias supply

1980-09-29

1982-06-08

Smith, Alfred E.

Radiant energy

With charged particle beam deflection or focussing

With target means

250403, H05G 100, H05G 134

Patent

active

043341535

ABSTRACT:
An adjustable focus x-ray tube has its cathode connected to the negative side of a dc power supply which is below ground by half of the total voltage applied to the tube and its anode connected to the positive side of the supply which is above ground by half of the applied voltage. A voltage divider is connected between the negative side or cathode and ground and an intermediate point on the divider is connected to a focusing electrode in the x-ray tube for providing a focusing bias voltage. Since the bias voltage is derived from the cathode-to-ground voltage it will always track or remain proportional to the cathode voltage so the effect of variations in the latter on focusing will be negated.

REFERENCES:
patent: 1567012 (1925-12-01), Pilon
patent: 1946286 (1934-02-01), Kearsley
patent: 2146889 (1939-02-01), Franke et al.
patent: 2798963 (1957-07-01), Saget
patent: 3916202 (1975-10-01), Heiting et al.

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