Poster ID:1140032688

Miniature Ion Source for RGA

click image to enlarge Miniature Ion Source for RGA

Author:Neil France

The ion source is one of the three main components of a Quadrupole Mass Spectrometer (QMS), and it is responsible for ionizing neutral atoms or molecules to create mainly singly charged positive ions. This is achieved using Electron Impact (EI) Ionisation whereby a current is applied to a tungsten or thoria filament, which causes electrons to be emitted thermally. These impact with sample molecules, knocking off electrons to create positively charged ions which can then fragment.

Poster presented at:
Intersect - 2005

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