An x-ray filament power supply device based on laser energy supply technology
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A filament power supply and laser energy supply technology, applied in laser technology and its application fields, can solve the problems of inability to meet the power requirements of X-ray filament power supply, limitations, etc., and achieve the effect of solving serious electromagnetic interference, good temperature characteristics, and prolonging life.
Active Publication Date: 2019-05-21
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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However, in the prior art, limited by the power of the photoelectric conversion module, its output power is generally 0.3W to 1W, which cannot meet the power requirements of the X-ray filament power supply.
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[0026] Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail, and following embodiment is explanation of the present invention and the present invention is not limited to following example, but can not limit the scope of the present invention.
[0027] like figure 1 As shown, in the process of X-ray emission, the target 7 is made of high melting point metal (generally Fe or Cu). The filament power supply 1 heats the filament 2 after being powered on, and the filament can emit thermal electrons. At the same time, the electrons generated are accelerated by a high-voltage power supply 4 of tens of thousands of volts to hundreds of thousands of volts, and the electron beam bombards the target 7, and the electrons lose kinetic energy and radiate in the form of photons. , X-rays are emitted from the target. At the same time, the filament power supply 1 needs to float on the high voltage power supply 4 . The filament powe...
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Abstract
The invention relates to an X-ray filament power source device based on the laser energy supply technology. The X-ray filament power source device comprises a host computer, a laser emission module, an energy supply fiber, a photoelectric conversion module, a DC / DC power source module, a measurement power source module, a filament voltage current measurement module, a voltage measurement transmission fiber, a current measurement transmission fiber, a fiber reception module, a CPLD module, a high pressure oil tank and a filament, wherein the photoelectric conversion module, the DC / DC power source module, the measurement power source module and the filament voltage current measurement module are arranged in the high pressure oil tank to realize insulation, sealing and heat radiation, and thephotoelectric conversion module, the DC / DC power source module and the measurement power source module are respectively added with heat radiation fins and are fixed at a side wall of the high pressure oil tank. The X-ray filament power source device is advantaged in that the laser energy supply mode is employed, the non-conductive characteristic of the laser is utilized, two ends of the energy supply fiber are made to have no direct electrical connection, so electrical isolation is realized, problems of insulation technical difficulty and severe electromagnetic interference are solved, the filament power in a range of 0-20W is adjustable, and use requirements of a X-ray filament power source are excellently satisfied.
Description
technical field [0001] The invention relates to the field of laser technology and its application, in particular to an X-ray filament power supply device used in a high-voltage environment. Background technique [0002] Currently used X-ray tubes are generally thermal electron X-ray tubes. Its principle is to use the thermal electrons emitted by the cathode filament in the vacuum tube as the electron source, and form a high-speed electron flow under the action of the high-voltage electric field between the two stages to bombard the opposite anode target to generate X-rays. When the X-ray tube is working, the filament power supply provides electric energy for heating the filament. The tube high voltage between the anode and cathode of the X-ray tube needs a DC high voltage power supply, and the filament power supply is generally directly connected to the high voltage output, and is at the same potential as the high voltage power supply. [0003] The current X-ray power supp...
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