Geometry for a linear time-of-light mass spectrometer with very high resolution
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United States of America Patent
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Apr 27, 1999
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N/A
app pub date -
Sep 9, 1997
filing date -
Sep 11, 1996
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Expired
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Abstract
A linear time-of-flight mass spectrometer which operates using ionization of analyte substances adsorbed on a sample support plate and an improvement in mass resolution through delayed acceleration of the ions in front of the sample support plate. The geometric design of the mass spectrometer consists of focusing the flight time of the ions in second or higher order by maintaining geometric requirements for the lengths of acceleration paths in the ion source relative to the field-free flight path length. In computer simulations, resolutions of flight time greater than one million have been obtained even for very high ion masses provided there is a correlation in space and velocity distribution when switching on the acceleration.
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