Geometry for a linear time-of-light mass spectrometer with very

Details Geometry for a linear time-of-light mass spectrometer with very Geometry for a linear time-of-light mass spectrometer with very

1997-09-09

1999-04-27

Nguyen, Kiet T.

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

H01J 4940

Patent

active

058981748

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.

REFERENCES:
patent: 5504326 (1996-04-01), Reilly et al.
patent: 5510613 (1996-04-01), Reilly et al.
Steven M. Colby et al., Anal. Chem. 1996, 68, Space-Velocity Correlation Focusing, pp. 1419-1428.
F. Chandezon et al., Rev. Sci. Instrum. 65(11), Nov. 1994, A New-Regime Wiley-McLaren Time-Of-Flight Mass Spectrometer, pp. 3344-3353.
P. Piseri et al., International Journal of Mass Spectrometry and Ion Processes 153 (1996), Parameterization Of A Two-Stage Mass Spectrometer Performing Second-Order Space Focusing, pp. 23-28.
J.M. Grundwurmer et al., Int. J. Mass Spectrom. Ion Processes 131 (1994), High-Resolution Mass Spectrometry In A Linear Time-Of-Flight Mass Spectrometer, pp. 139-148.

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