Device for the achromatic magnetic deflection of a beam of charged particles and an irradiation apparatus using such a device
US4322622A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1980 |
| Grant date | Mar 30, 1982 |
| Priority date | — |
| Expiry date | Apr 3, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2005/1089
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An achromatic magnetic deflection device for deflecting by an angle .phi. between .pi. and 2.pi. a beam of charged accelerated particles having different momentum. This device comprises an electromagnet provided with pole pieces delimiting three contiguous sectors, the whole of these sectors, having an axis of symmetry XX, presenting flat input E and output S faces and common faces F.sub.1 and F.sub.2 in an arc of a circle, the position, the radius of curvature of these faces F.sub.1, F.sub.2 as well as the value of the magnetic induction in the sectors being chosen so that the different paths are substantially orthogonal both to faces F.sub.1, F.sub.2 and to axis XX.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.