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Electron ionization
Videos
Electron ionization is an ionization method in which energetic electrons interact with solid or gas phase atoms or molecules to produce ions. EI was one of the first ionization techniques developed fo
Arthur J. Dempster
Arthur J. Dempster
Ion source
Videos
An ion source is a device that creates atomic and molecular ions. Ion sources are used to form ions for mass spectrometers, optical emission spectrometers, particle accelerators, ion implanters and io
Electron ionization
…where M is the analyte molecule being ionized, e− is the electron and M+• is the resulting molecular ion. In an EI ion source, electrons are produced through thermionic emission by heating a wire filament that has electric current running through it. The kinetic energy of the…
Mass spectrometer EI/CI ion source
Mass spectrometer EI/CI ion source
Electron ionization source schematic
Electron ionization source schematic
NASA's NEXT space craft propulsion system
NASA's NEXT space craft propulsion system
Capillaritron with quartz capillary in operation within a vacuum chamber: On the left the glowing capillary with the plasma up to the extraction catho
Capillaritron with quartz capillary in operation within a vacuum chamber: On the left the glowing capillary with the plasma up to the extraction cathode and on the right behind it the bluish glowing ion beam.