X-ray or gamma ray systems or devices – Source support – Source cooling
Patent
1989-04-13
1991-02-19
Church, Craig E.
X-ray or gamma ray systems or devices
Source support
Source cooling
378 4, 378101, H01J 3512
Patent
active
049950690
ABSTRACT:
An alternating-current voltage of a commercial power supply is converted to a direct-current voltage by a rectifier and the output direct-current voltage of the rectifier is converted to an alternating-current voltage again by a DC/AC inverter. The alternating-current voltage is boosted by a transformer up to an intermediate voltage (e.g., 1-20 KV). The output voltage of the transformer is supplied through the slip-ring provided between a frame stationary section and a frame rotating section of a voltage multiplier provided within the rotating section to be multiplied to a high voltage (e.g., .+-.60-.+-.70 KV). Outputs of the voltage multiplier are supplied to the anode and cathode of an X-ray tube. A voltage multiplier for producing an anode supply voltage and a voltage multiplier for producing a cathode supply voltage are constructed in separate units. The two voltage multiplier units and the X-ray tube unit are disposed within a housing of the rotating section shaped like a ring at equal angular intervals of 120.degree.. The X-ray tube unit contains a protective resistor. The protective resistor is connected in at least one of positions between the anode of the X-ray tube and an anode voltage supply terminal, between a center metal of the X-ray tube and a center metal terminal and between the cathode of the X-ray tube and a cathode voltage supply terminal.
REFERENCES:
patent: 2216210 (1940-10-01), Mutscheller
patent: 3309523 (1967-03-01), Dyke et al.
patent: 4117334 (1978-09-01), Strauts
patent: 4192997 (1980-03-01), Baumann
patent: 4324978 (1982-04-01), Kalender et al.
patent: 4651338 (1987-03-01), Hahn
patent: 4720844 (1988-01-01), Bougle
patent: 4783795 (1988-11-01), Yahara
patent: 4856036 (1989-08-01), Malcolm et al.
Church Craig E.
Kabushiki Kaisha Toshiba
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