E×B ion detector for high efficiency time-of-flight mass spectrometers
US7180060B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2004 |
| Grant date | Feb 20, 2007 |
| Priority date | — |
| Expiry date | Jul 29, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ion detector having a planar electrically conducting entrance plate, a converter assembly including a planar electrically conducting converter plate and a converter member for providing free electrons upon impact of ions, a planar electrically conducting exit plate having an exit window, a magnet assembly, and an electron detection assembly. The planes of the converter plate and the entrance plate are parallel and electrically biasable in order to provide a homogeneous electric field. The magnet assembly provides a homogenous magnetic field between the converter plate and the exit plate, the magnetic field extending parallel to the plane of the converter plate. The ratio between the electric and the magnetic field is such that the electrons emitted from the converter plate travel to the exit window and are detected by the electron detection assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.