High luminosity spherical analyzer for charged particles
US4806754A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1987 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Jun 19, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/482
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An energy analyzer for electrons comprises three spherically configured cylindrically symmetric members. An outer member is a hollow spherical section having a first inlet edge. A first inner member is a spherical portion disposed concentrically within the outer member with a defined space therebetween, and has a second inlet edge cooperative with the first inlet edge to form an inlet opening receptive of electrons from a conical lens. A second inner member is a spherical segment disposed concentrically within the outer member and has a second outlet edge cooperative with a first outlet edge of the first inner member to define an exit slot for egress of charged particles having selected trajectories in the defined space. A cylindrical detector is situated within the spherical members for detecting the egressed charged particles. The inlet opening and the exit slot are such that the angle subtended by the selected trajectories between the inlet opening and the exit slot is preferably between about 0.8.pi. and .pi. radians.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.