Ion guide for mass spectrometry
First Claim
1. An ion guide, comprising:
- an enclosure extending longitudinally around a central axis from a proximal inlet end to a distal outlet end, the proximal inlet end being configured to receive a plurality of ions entrained in a gas flow flowing through an inlet orifice;
a deflection plate disposed within said enclosure between the proximal and distal ends, said plate deflecting at least a portion of the gas flow away from a central direction of the gas flow; and
a plurality of electrically conductive, elongate elements extending from the proximal end to the distal end within said enclosure, said elongate elements generating an electric field via a combination of RF and DC electric potentials applied to at least one of the enclosure and the elongate elements, said electric field deflecting said entrained ions away from the central direction of the gas flow proximal to said deflection plate and confining said deflected ions in proximity of said elongated elements as said ions travel downstream.
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Accused Products
Abstract
An ion guide is provided having an enclosure extending longitudinally around a central axis from a proximal inlet end to a distal outlet end. The proximal inlet end receives a plurality of ions entrained in a gas flow through an inlet orifice. A deflection plate is disposed within the enclosure between the proximal and distal ends and deflects at least a portion of the gas flow away from a central direction of the gas flow. A plurality of electrically conductive, elongate elements extend from the proximal end to the distal end within the enclosure and generate an electric field via a combination of RF and DC electric potentials. The electric field deflects the entrained ions away from the central direction of the gas flow proximal to the deflection plate and confines the deflected ions in proximity of the elongated elements as the ions travel downstream.
13 Citations
20 Claims
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1. An ion guide, comprising:
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an enclosure extending longitudinally around a central axis from a proximal inlet end to a distal outlet end, the proximal inlet end being configured to receive a plurality of ions entrained in a gas flow flowing through an inlet orifice; a deflection plate disposed within said enclosure between the proximal and distal ends, said plate deflecting at least a portion of the gas flow away from a central direction of the gas flow; and a plurality of electrically conductive, elongate elements extending from the proximal end to the distal end within said enclosure, said elongate elements generating an electric field via a combination of RF and DC electric potentials applied to at least one of the enclosure and the elongate elements, said electric field deflecting said entrained ions away from the central direction of the gas flow proximal to said deflection plate and confining said deflected ions in proximity of said elongated elements as said ions travel downstream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of transmitting ions, comprising
receiving a plurality of ions entrained in a gas flow at an inlet end of an enclosure, said enclosure extending longitudinally around a central axis from a proximal inlet end to a distal outlet end; -
applying RF and DC electric potentials to at least one of the enclosure and a plurality of electrically conductive, elongate elements within said enclosure and extending from said proximal end to said distal end, said electric field deflecting at least a portion of said entrained ions away from the central axis and confining said deflected ions in proximity of at least one said elongated elements as ions travel toward said distal outlet end, deflecting at least a portion of the gas flow to an opening for exiting the enclosure subsequent to deflecting said deflected ions. - View Dependent Claims (18, 19)
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20. An ion guide, comprising:
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a proximal, inlet plate having an inlet aperture configured to receive a plurality of ions entrained in a gas flow; a distal, outlet plate having an outlet aperture configured to transmit a plurality of ions to a mass analyzer; a plurality of electrically conductive elements surrounding a central axis and extending within a region between said inlet plate and said outlet plate; and a deflection plate disposed between said inlet and outlet plates, said deflection plate configured to deflect at least a portion of the gas flow away from a central direction of the gas flow, wherein said electrically conductive elements are configured to separate said entrained ions from said gas flow proximal to said deflection plate and focus said separated ions along the central axis distal to said deflection plate.
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Specification