METHOD AND APPARATUS FOR IMPROVED SENSITIVITY IN A MASS SPECTROMETER
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Dec 25, 2014
app pub date -
Feb 1, 2013
filing date -
Feb 1, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Ions are generated in a high pressure region and are passed into a vacuum chamber having an inlet and an exit aperture. The configuration of the inlet aperture and the pressure difference between the high pressure region and the vacuum chamber provides a supersonic free jet expansion that has a barrel shock of predetermined diameter. At least one ion guide is provided between the inlet and exit apertures having a predetermined cross-section defining an internal volume wherein the cross-section of the at least one ion guide is sized to be at least 50% of the predetermined diameter of the barrel shock of the supersonic free jet expansion. An RF voltage is provided to the at least one ion guide. Radial gas conductance is reduced in a first section of the at least one ion guide for damping shock waves resulting from the supersonic free jet expansion.
First Claim
Other Claims data not available
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 7 Citation Count
- H01J Class
- 10.83 % this patent is cited more than
- 11 Age