X-RAY TUBES, METHODS AND SYSTEMS FOR ADJUSTING FOCAL POINTS OF X-RAY TUBES, AND CATHODE ASSEMBLIES
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Mar 27, 2025
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Sep 25, 2024
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Sep 25, 2024
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Abstract
Embodiments of the present disclosure provide an X-ray tube. The X-ray tube may include a cathode assembly. The cathode assembly may include: a cathode configured to emit an electron beam; a cathode adjustment window disposed at a periphery of the cathode; and a controller configured to adjust emittance of the electron beams emitted from the cathode at different tube voltages by adjusting a potential difference between the cathode adjustment window and the cathode, so that a size of an electron beam spot formed by the electron beam matches a target focal point size.
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