Method for sweeping charged particles out of an isochronous cyclotron, and device therefor
US6057655A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1998 |
| Grant date | May 2, 2000 |
| Priority date | — |
| Expiry date | Apr 3, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H7/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for extracting a charged particle beam out of an isochronous cyclotron (1) comprising an electromagnet forming a magnetic circuit that includes at least a number of sectors (3, 3') known as "hills" where the air-gap is reduced, and separated by sector-shaped spaces (4) known as "valleys" where the air-gap is larger. According to the extraction method, the particle beam is extracted without using an extraction device as the magnetic field has a special arrangement produced by designing the electromagnet air-gap at the "hills" (3, 3') of the isochronous cyclotron in such a way that the aspect ratio between the electromagnet air-gap at the "hills" in the region of the maximum radius, and the radius gain per turn of the particles accelerated by the cyclotron at said radius is less than 20.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.