Charged particle accelerator
US8659243B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2011 |
| Grant date | Feb 25, 2014 |
| Priority date | — |
| Expiry date | Aug 20, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/04735
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a charged particle accelerator, voltage of several tens of kV is applied between accelerating electrodes. In such a case, electric discharge is sometimes generated between the accelerating electrodes. In the charged particle accelerator, part or entirety of the accelerating electrodes is coated with an electric discharge suppressing layer made of ceramics or alloy having a high melting point as compared with metal. When impurity fine particles are accelerated by an electric field and collide with the electrodes, the electric discharge suppressing layer made of ceramics or alloy prevents metal vapor from being easily generated from the electrodes and an ionized plasma from being easily produced, thus suppressing electric discharge between the electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.