Radiant energy – With charged particle beam deflection or focussing – With target means
Patent
1977-09-30
1980-01-01
Church, Craig E.
Radiant energy
With charged particle beam deflection or focussing
With target means
250417, 250413, H05G 130
Patent
active
041818571
ABSTRACT:
An X-ray apparatus for a computed tomography scanner comprises a capacitor device formed of a plurality of capacitors which have the same capacitance and are successively connected to a first changeover switch between the filament and anode of an X-ray tube. There are connected in series between the anode of the X-ray tube and the first changeover switch a high voltage switch for intermittently applying a high voltage across the anode and filament of the X-ray tube and a wave tail cut circuit whose contact is opened when a drop takes place in the voltage of the capacitor connected to the first changeover switch. The capacitor device is connected to the secondary winding of a high voltage transformer through a second changeover switch and a diode connected to the plural capacitor in turn. Between the second changeover switch and the secondary winding of the high voltage transformer are connected a rectifier and the contact of a charge-interrupting circuit which is opened when a rise occurs in the voltage of the capacitor connected to the second changeover switch. The plural capacitors of the capacitor device are successively charged with high voltage of a prescribed level. The high voltage of the prescribed level with which the plural capacitors of the capacitor device are charged is successively applied at a short interval across the filament and anode of the X-ray tube, which emits the prescribed amount of X-radiation succession of short burst.
REFERENCES:
patent: 2129646 (1938-09-01), Bouwers
patent: 3069548 (1962-12-01), Bavor
Church Craig E.
Tokyo Shibaura Electric Co. Ltd.
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