Focusing structures with non-rectilinear focusing apertures
US9728370B2 · kind B2 · utility
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4References
19Claims
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Key dates
| Filing date | Jan 30, 2015 |
| Grant date | Aug 8, 2017 |
| Priority date | — |
| Expiry date | Jul 3, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J35/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An example embodiment includes a cathode assembly. The cathode assembly includes a cathode head, a filament, a focusing structure, and a non-rectilinear focusing aperture. The cathode head defines a filament slot. The filament is positioned in the filament slot that is capable of emitting electrons by thermionic emission. The focusing structure is positioned at least partially between the filament and an anode. The non-rectilinear focusing aperture is defined in the focusing structure. The non-rectilinear focusing aperture is configured to shape an emission profile of electrons emitted by the filament.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.