Interface for transporting ions from an atmospheric pressure environment to a low pressure environment
Abstract:
An interface transports ions from a first pressure environment to a lower pressure analysis instrument and may include a first region pumped to a second pressure less than the first pressure, a first ion funnel disposed in the first region, a first ion carpet in the first region opposite an ion outlet end of the first ion funnel, a second region pumped to a third pressure less than the second pressure and greater than the instrument pressure, a second ion funnel disposed in the second region and a second ion carpet in the second region opposite an ion outlet end of the second ion funnel. Ions from the environment pass sequentially through the first and second ion funnels and into the analysis instrument. Each of the first and second ion funnels define a tapered axial passageway therethrough each defining a respective virtual jet disrupter therein.
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