TWI748296B
An X-ray tube (120) is provided with: a cathode (140) and an anode (150) sealed inside a vacuum envelope (121); and an ion-collecting conductor (130) attached to the vacuum envelop so as to be in contact with an internal space of the vacuum envelope. A first current sensor (210) measures a value of...
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Main Authors | , , , |
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Format | Patent |
Language | Chinese |
Published |
01.12.2021
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Subjects | |
Online Access | Get full text |
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Summary: | An X-ray tube (120) is provided with: a cathode (140) and an anode (150) sealed inside a vacuum envelope (121); and an ion-collecting conductor (130) attached to the vacuum envelop so as to be in contact with an internal space of the vacuum envelope. A first current sensor (210) measures a value of a first current (Ii) flowing between the ion-collecting conductor (130) and a node (Ng) for supplying potential for attracting positive ions in the vacuum envelope (121). A second current sensor (180) measures a value of a second current (Ie) flowing between the anode (150) and the cathode (140). A control circuit (190) generates diagnostic information on the degree of vacuum of the X-ray tube (120) based on a current ratio Ii/Ie of the first current value (Ii) measured by the first current sensor (210) to the second current value (Ie) measured by the second current sensor (180). |
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Bibliography: | Application Number: TW20198143780 |