Mass spectrometer system including an ion source operable under high pressure conditions, and a two-stage pumping arrangement
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United States of America Patent
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Nov 17, 1992
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N/A
app pub date -
Feb 28, 1991
filing date -
Feb 28, 1991
priority date (Note) -
Expired
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Abstract
A mass spectrometer system includes an ion source effective to produce ions within a viscous flow region. A pumping arrangement is effective to produce a further viscous flow region of lower pressure than the first region, ions passing through the further region into a molecular flow region. The energy of the ions is defined as they enter the molecular flow region.
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