Achromatic deflector and quadrupole lens
US4590379A · kind A · utility
14Cited by
5References
5Claims
0Family size
Inventor
Key dates
| Filing date | Sep 16, 1982 |
| Grant date | May 20, 1986 |
| Priority date | — |
| Expiry date | Sep 16, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J3/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The process of achromatic deflection by substantially uniform, crossed electric and magnetic fields with certain magnitudes. When the magnetic force is opposite to the electric force and twice as large, deflection is independent of particle velocity. An achromatic deflector produced by proper excitation of the poles of an achromatic quadrupole lens by means of suitable power supplies, without additional parts within the lens. An achromatic quadrupole lens having no yoke and only four electrodes, suitable for deflections varying at high frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.