X-ray or gamma ray systems or devices – Electronic circuit – X-ray source power supply
Patent
1988-02-12
1991-08-27
Church, Craig E.
X-ray or gamma ray systems or devices
Electronic circuit
X-ray source power supply
378106, 378122, H05G 110
Patent
active
050440047
ABSTRACT:
An apparatus for producing high energy, pulsed, flash X-rays which is of a useful laboratory-scale size. The apparatus includes a hydrogen thyratron coupled between a D.C. power source and a low impedance Blumlein, and a low impedance X-ray head. The thyratron is in a grounded grid configuration and provides a commutated input voltage to the Blumlein at a high repetition rate. The switching waveform output of the Blumlein is applied across a pair of spaced electrodes in the X-ray head to produce an X-ray emitting discharge therebetween. A portion of the electrode assembly is preferably cast integral in an insulating base plate of the head. A pair of foil sheet conductors are preferably cast in the base plate to respectively connect the electrodes to the Blumlein. An apertured cover plate is mounted over the base plate with a seal ring interposed between the plates around the electrodes to establish a sealable evacuatable chamber around the discharge gap between the electrodes. In the high voltage embodiment, eight Blumleins are stacked to be charged in parallel and synchronously commuted by a single thyratron at one end stacked in series at the other end. Significant voltage gain is maintained for periods around 20 ns to produce discharge voltages to 200 kV in an x-ray diode at peak currents of 0.5 kA for a 60 kV charging voltage.
REFERENCES:
patent: 2341483 (1944-02-01), Stephen
patent: 2900542 (1959-08-01), McEuen
patent: 3432664 (1969-03-01), Robison
patent: 3783288 (1974-01-01), Barbour et al.
patent: 4429228 (1984-01-01), Anderson
patent: 4517497 (1985-05-01), Malone
patent: 4563584 (1986-01-01), Hoffman et al.
patent: 4570106 (1986-02-01), Sohval et al.
patent: 4947415 (1990-08-01), Collins
"Scaling, to High Average Powers of a Flash X-Ray Source . . . ", by Davanloo et al., Rev. Sci. Instr., vol. 58, #11, Nov. 1987, pp. 2103-2109.
Flash X-Ray Tube for Diffraction Studies . . . Johnson et al., Rev. Sci. Instrum 51(6), Jun. 1980, p. 741.
A High Intensity, Fine Focus, Source of Continuous . . . by Ottewell et al., J. Phys E. (G.B.), vol. 4, No. 10 (Oct. 1977).
A High Energy Flash X-Ray Facility-by Gilbert et al., British Journal of NDT, May 1974.
Cook et al., "Off-Resonance Transformer Charging for 250 kV Water Blumlein", 10/79, vol. ED-26, No. 10, IEEE Trans. on Electronic Devices, pp. 1512-1517.
Swift et al., "Flash X-Ray Actuated Trigger Switch", 5/68, vol. 30, No. 5, The Review of Scientific Instruments, pp. 728-730.
Bowen T. S.
Collins C. B.
Coogan J. J.
Davanloo F.
Krause R. K.
Board of Regents , The University of Texas System
Church Craig E.
LandOfFree
Flash X-ray apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flash X-ray apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flash X-ray apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1420617