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The field emission cathode and the beam current measurement technology which adjust thermally
The field emission cathode and the beam current measurement technology which adjust thermally
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机译：热调节的场发射阴极和电子束电流测量技术
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摘要
X-ray source of this invention with the laser light which is spread alongside the optical fiber cable includes the carbon nano- tube field emission cathode which is heated. 2 terminal x-ray tube of this invention which is produced as the result makes the voltage of the and the control where electric current of the becomes independent possible. Control of voltage of the is achieved usually, using the control electrode, electric current of the is controlled by the thermal adjustment. This invention offers the technology in order to measure the beam current of x-ray source accurately. This technology until the dose of desire of thing and the output x-ray emission which activate the cathode is achieved includes the fact that you adjust the strength of the laser, and the fact that all electric current of the x-ray tube is measured. Next, the cathode is turned off in order to turn off the electron beam. And, electric current of the x-ray tube is measured for the second time. The cathode is turned on after that directly, again. Difference between two values of electric current of the above-mentioned x-ray tube gives the beam current of the accurate x-ray tube.
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