ION GUIDE FOR MASS SPECTROMETERS
First Claim
1. An apparatus that facilitates the transmission of ions in a mass spectrometer, said apparatus comprising:
- a plurality of segmented electrodes,wherein each segmented electrode includes alternating electrically insulating and electrically conducting regions,wherein said each segmented electrode includes an aperture for passage of sample ions therethrough,wherein said plurality of segmented electrodes are aligned along a common axis such that said electrically conducting regions of each said segmented electrode is aligned with said electrically conducting regions of adjacent said segmented electrode, andwherein said each electrically conducting region that is aligned along an axis of said each segmented electrode comprises an RF potential that is 180°
out of phase from an RF potential of an adjacent electrically conducting region that is aligned along said axis on an adjacent segmented electrode.
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Abstract
The present invention relates generally to mass spectrometry and the analysis of chemical samples, and more particularly to ion guides for use therein. The invention described herein comprises an improved method and apparatus for transporting ions from a first pressure region in a mass spectrometer to a second pressure region therein. More specifically, the present invention provides a segmented ion funnel for more efficient use in mass spectrometry (particularly with ionization sources) to transport ions from the first pressure region to the second pressure region.
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Citations
15 Claims
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1. An apparatus that facilitates the transmission of ions in a mass spectrometer, said apparatus comprising:
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a plurality of segmented electrodes, wherein each segmented electrode includes alternating electrically insulating and electrically conducting regions, wherein said each segmented electrode includes an aperture for passage of sample ions therethrough, wherein said plurality of segmented electrodes are aligned along a common axis such that said electrically conducting regions of each said segmented electrode is aligned with said electrically conducting regions of adjacent said segmented electrode, and wherein said each electrically conducting region that is aligned along an axis of said each segmented electrode comprises an RF potential that is 180°
out of phase from an RF potential of an adjacent electrically conducting region that is aligned along said axis on an adjacent segmented electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification