X-ray tube and X-ray generation device
US10999918B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 11, 2018 |
| Grant date | May 4, 2021 |
| Priority date | — |
| Expiry date | Dec 11, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2235/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An X-ray tube, including: an envelope (11) that holds inside thereof at a predetermined pressure; a filament (12) for emitting electrons and a focus electrode (13) provided in the envelope: and a target (15) for generating X-ray provided in the envelope facing to the filament (12) and the focus electrode (13), wherein the envelope (11) has an envelope body (11a) and an X-ray window portion (16) having a higher X-rays transmissivity and a higher electric conductivity than the envelope body (11a), when the X-ray window portion (16) or the anode (14) is set to a lower electric potential than both of an electric potential of the anode (14) or the X-ray window portion (16) and an electric potential of the filament (12) and the focus electrode (13), detection of at least one of an ion current (Ii) or an electron current (Ie) through the X-ray window portion (16) or the anode (14) is possible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.