Mass Spectrometer
First Claim
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1. A time of flight mass analyser comprising:
- an ion guide comprising a plurality of electrodes;
first means arranged and adapted to confine ions radially within said ion guide; and
second means arranged and adapted to apply a time varying inhomogeneous axial electric field along at least a portion of the axial length of said ion guide.
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Abstract
A mass spectrometer is disclosed comprising a time of flight mass analyser (7). The time of flight mass analyser (7) comprises an ion guide comprising a plurality of electrodes (1) which are interconnected by a series of resistors (2) forming a potential divider. Ions are confined radially within the ion guide by the application of a two-phase RF voltage to the electrodes (1). A single phase additional RF voltage is applied across the potential divider so that an inhomogeneous pseudo-potential force is maintained along the length of the ion guide.
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Citations
92 Claims
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1. A time of flight mass analyser comprising:
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an ion guide comprising a plurality of electrodes; first means arranged and adapted to confine ions radially within said ion guide; and second means arranged and adapted to apply a time varying inhomogeneous axial electric field along at least a portion of the axial length of said ion guide. - View Dependent Claims (11, 15, 18, 19, 20, 23, 26, 27, 28, 29, 38, 39, 40)
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2-10. -10. (canceled)
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12-14. -14. (canceled)
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16. (canceled)
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21. (canceled)
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30-37. -37. (canceled)
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41-87. -87. (canceled)
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88. A method of mass analysing ions according to their time of flight comprising:
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providing an ion guide comprising a plurality of electrodes; confining ions radially within said ion guide; and applying a time varying inhomogeneous axial electric field along at least a portion of the axial length of said ion guide.
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89. (canceled)
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90. (canceled)
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91. A method of temporally separating ions according to their mass to charge ratio and/or ion mobility, comprising:
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providing an ion guide comprising a plurality of electrodes; confining ions radially within said ion guide; and applying a time varying inhomogeneous axial electric field along at least a portion of the axial length of said ion guide. - View Dependent Claims (92)
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Specification