| 摘要 |
PURPOSE: To enhance the temperature stability of a device by placing a material having melting latent heat inside a circulation space, and allowing the material to melt during the operating stage of an X-ray tube to absorb heat and to solidify in its stopped stage. CONSTITUTION: An X-ray tube 1 has a high vacuum formed inside a glass case 3. A cathode 4 and an anode 5 are placed within the case 3, the anode 5 is placed at the end of a rotor 6, and the rotor 6 operates together with an external stator 7. A device also has a casing 2 surrounding the X-ray tube 1 and defining a circulation space for coolant flow communicated to a refrigerator, and further has a material 16 placed inside the circulation space and having melting latent heat, the material 16 melting during the operating stage of the X-ray tube 1 to absorb heat, and solidifying during the stopped stage of the X-ray tube 1. The material 16 used has as high melting latent heat as possible, its melting temperature being close to the average temperature of the coolant in the absence of the material 16. Therefore, temperature stability during inspection and in stopped stages can be enhanced.
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