Method and system for vacuum driven mass spectrometer interface with adjustable resolution and selectivity
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United States of America Patent
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Aug 20, 2013
Grant Date -
Nov 8, 2012
app pub date -
Jul 3, 2012
filing date -
May 30, 2008
priority date (Note) -
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Abstract
A mass spectrometer system and method of operating same are provided. The system comprises an ion conduit for receiving ions; a boundary member defining a curtain gas chamber containing the ion conduit; a curtain gas supply for providing a curtain gas to an inlet of the ion conduit to provide a gas flow into the conduit, and a curtain gas outflow out of a curtain gas chamber inlet; a mass spectrometer at least partially sealed to, and in fluid communication with, the conduit for receiving the ions from the conduit; a vacuum chamber surrounding the mass spectrometer operable to draw the gas flow including the ions through the conduit and into the vacuum chamber; and, a gas outlet for drawing a gas outflow from the gas flow located between the conduit and the mass spectrometer to increase the gas flow rate through the conduit.
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