Assemblies for ion and electron sources and methods of use
US-2016254132-A1 · Sep 1, 2016 · US
Mass spectrometer vacuum interface method and apparatus
US9012839B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9012839-B2 |
| Application number | US-201214364616-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 12, 2012 |
| Priority date | Dec 12, 2011 |
| Publication date | Apr 21, 2015 |
| Grant date | Apr 21, 2015 |
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Abstract
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A method of operating a mass spectrometer vacuum interface comprising a skimmer apparatus having a skimmer aperture and downstream ion extraction optics. An expanding plasma is skimmed through the skimmer aperture. Within the skimmer apparatus, a portion of the skimmed plasma adjacent the skimmer apparatus is separated from the remainder of the skimmed plasma by providing means to prevent, inhibit or impede, the separated portion from reaching the extraction optics while allowing the remainder to expand towards the extraction optics. This allows removal of ions liberated from deposition matter on the skimmer apparatus surface, thereby discriminating against such ions, and offering reduced memory effects. The remainder of the plasma can expand towards the extraction optics, so interaction and mixing between the boundary layer and the remainder of the plasma can be reduced or minimized.
First claim
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What is claimed is: 1. A method of operating a mass spectrometer vacuum interface comprising a skimmer apparatus having a skimmer aperture and downstream ion extraction optics, the method comprising: skimming an expanding plasma through the skimmer aperture; and separating within the skimmer apparatus a portion of the skimmed plasma adjacent the skimmer apparatus from the remainder of the skimmed plasma by providing means to prevent the separated portion from reaching the ion ex…
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Electricity · mapped topic
Electricity · mapped topic
- H01J49/067Primary
Electricity · mapped topic
- H01J49/06Primary
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US9012839B2 cover?
- A method of operating a mass spectrometer vacuum interface comprising a skimmer apparatus having a skimmer aperture and downstream ion extraction optics. An expanding plasma is skimmed through the skimmer aperture. Within the skimmer apparatus, a portion of the skimmed plasma adjacent the skimmer apparatus is separated from the remainder of the skimmed plasma by providing means to prevent, inhi…
- Who is the assignee on this patent?
- Makarov Alexander Alekseevich, Rottmann Lothar, Thermo Fisher Scient Bremen
- What technology area does this patent fall under?
- Primary CPC classification H01J49/067. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 21 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).