| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotating anode X-ray tube capable of easily detecting liquid metal leakage. SOLUTION: In the case that a vacuum vessel 3 is made of a metal, it is hard to confirm the leakage of a liquid metal 26 from the outside of the vacuum vessel 3. The leakage of the liquid metal 26 does not become evident immediately in a withstand voltage. A monitor electrode 32 penetrates and is electrically insulated through/from the vacuum vessel 3. When the liquid metal 26 leaks from a gap between a rotating member 15 and a fixed shaft 21 and flows into a recessed part 34, insulation resistance between the vacuum vessel 3 and the monitor electrode 32 becomes low. The insulation resistance between the vacuum vessel 3 and the monitor electrode 32 is measured by a leakage detector. If the insulation resistance between the vacuum vessel 3 and the monitor electrode 32 is low, it can be decided that the liquid metal 26 leaks. Therefore, the leakage of the liquid metal 26 can be detected with ease and reliability. COPYRIGHT: (C)2006,JPO&NCIPI
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