High voltage capacitance discharge system for x-ray tube control

Details High voltage capacitance discharge system for x-ray tube control High voltage capacitance discharge system for x-ray tube control

1990-07-05

1991-12-31

Westin, Edward P.

X-ray or gamma ray systems or devices

Electronic circuit

X-ray source power supply

378103, 315161, 31511101, 315156, H05G 110

Patent

active

050777700

ABSTRACT:
An exposure control (A) selectively applies electrical power across a transformer (10) of a high voltage power supply (B). The high voltage power supply boosts the voltage such that an output voltage on the order of 150 kV is provided on output lines (20+, 20-). The output lines, typically long cables, are connected with a high voltage device such as an x-ray tube (C) to control the generation of a beam of x-rays (D). Due to high internal capacitance (22, 28) of the power supply, the cables, and the x-ray tube, the output lines continue to carry a potential (34) after the end t.sub.2 of the selected duration. At the end of the selected duration, a pulser (62, 80) applies an electrical energy pulse which causes a medium in a gap (56, 76) between electrodes (52, 54; 72, 74) to be ionized. Once the medium is ionized, the stored electrical energy arcs through the ionized medium and flows quickly to ground as indicated at (42).

REFERENCES:
patent: 2214441 (1940-09-01), Seaman et al.
patent: 3243650 (1966-03-01), Hawkins et al.
patent: 3393338 (1968-07-01), Lee et al.
patent: 3611433 (1971-10-01), Erst et al.
patent: 4550272 (1985-10-01), Kimura et al.
patent: 4730352 (1988-03-01), Rovacchi

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