X-ray generating mechanism using electron field emission cathode
US6850595B2 · kind B2 · utility
38Cited by
36References
54Claims
0Family size
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Key dates
| Filing date | Dec 4, 2002 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Dec 4, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/939
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An x-ray generating device includes a field emission cathode formed at least partially from a nanostructure-containing material having an emitted electron current density of at least 4 A/cm2. High energy conversion efficiency and compact design are achieved due to easy focusing of cold cathode emitted electrons and dramatic reduction of heating at the anode. In addition, by pulsing the field between the cathode and the gate or anode and focusing the electron beams at different anode materials, pulsed x-ray radiation with varying energy can be generated from a single device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.