X-ray tube

Details X-ray tube X-ray tube

1995-12-14

1997-04-15

Wong, Don

X-ray or gamma ray systems or devices

Source

Electron tube

378136, H01J 3514

Patent

active

056217811

ABSTRACT:
A rotating X-ray tube comprises a cathode assembly including a cathode and a cathode current supply, and an anode assembly having an anode current controlled via the cathode current supply. A filament for emitting electrons is separated from the cathode. A cathode cup supports the filament and provides electron field shaping assistance. The X-ray tube further comprises a distributed capacitance for affecting the cathode cup electron field, and an insulator leakage resistance. The cathode cup is allowed to float on the insulator leakage resistance, whereby voltage associated with the distributed capacitance and the leakage resistance is allowed to remain relatively constant.

REFERENCES:
patent: 4777642 (1988-10-01), Ono

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