Permanent magnet lens array
US8698094B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2011 |
| Grant date | Apr 15, 2014 |
| Priority date | — |
| Expiry date | Aug 1, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/1534
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnetic lens array for charged-particle focusing includes a first sheet of soft magnetic material, wherein the first sheet of soft magnetic material includes a plurality of snorkel cone protrusions arranged in an array pattern, wherein each snorkel cone is axially symmetric and includes an opening passing from a first surface of the first sheet of soft magnetic material to a second surface of soft magnetic material, and a plurality of permanent magnetic elements, wherein each permanent magnetic element is axially symmetric and arranged concentrically with a snorkel cone of the first sheet of soft magnetic material, wherein the snorkel cones of the first sheet of soft magnetic material and the plurality of permanent magnetic elements are configured to form a plurality of magnetic lenses, wherein each magnetic lens has a magnetic field with an axial component oriented perpendicular to the first surface of the soft magnetic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.