Resonance method for production of intense low-impurity ion beams of atoms and molecules
US7365340B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2005 |
| Grant date | Apr 29, 2008 |
| Priority date | — |
| Expiry date | May 17, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/31705
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention comprehends a compact and economical apparatus for producing high intensities of a wide variety of wanted positive and negative molecular and atomic ion beams that have been previously impossible to previously produce at useful intensities. In addition, the invention provides a substantial rejection of companion background ions that are frequently simultaneously emitted with the wanted ions. The principle underlying the present invention is resonance ionization-transfer where energy differences between resonant and non-resonant processes are exploited to enhance or attenuate particular charge-changing processes. This new source technique is relevant to the fields of Accelerator Mass Spectroscopy; Molecular Ion Implantation; Generation of Directed Neutral Beams; and Production of Electrons required for Ion Beam Neutralization within magnetic fields. An example having commercial importance is ionization of the decaborane molecule, B10H14 where an almost perfect ionization resonance match occurs between decaborane molecules and arsenic atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.