Ion analysis apparatus and method
First Claim
1. An ion analysis apparatus comprising an ion guide having an ion optical axis extending from an ion inlet to an ion outlet, the ion guide being configured to guide ions from the ion inlet to the ion outlet along the ion optical axis,wherein the apparatus includes ion axial guide that in use causes the ions to move along the ion optical axis,wherein the ion guide comprises at least one extraction region located between the ion inlet and the ion outlet, the at least one extraction region being configured to extract ions moving along the ion optical axis of the ion guide in an extraction direction, the extraction direction being substantially orthogonal to the ion optical axis of the ion guide,wherein the apparatus includes an ion radial confinement device that in use confines the ions in the radial direction within the ion guide, said ion radial confinement device comprising a first ion radial confinement device associated with a portion of the ion guide located before the extraction region and a second ion radial confinement device associated with the at least one extraction region, andwherein the extraction region is switchable between:
- an extraction mode in which the extraction region has an extraction field to extract ions from the extraction region while ions are being moved along the ion optical axis by the ion axial guide in other portions of the km guide; and
a transmission mode in which the extraction region has a transmission field to allow ions to move through the extraction region salting the ion optical axis.
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Abstract
The present invention is concerned with an ion analysis apparatus comprising an ion guide having an ion optical axis extending from an ion inlet to an ion outlet, the ion guide being configured to guide ions from the ion inlet to the ion outlet along the ion optical axis, wherein the ion guide comprises at least one extraction region located between the ion inlet and the ion outlet, the at least one extraction region being configured to extract ions moving along the ion optical axis of the ion guide in an extraction direction, the extraction direction being substantially orthogonal to the ion optical axis of the ion guide, wherein the apparatus includes ion radial confinement means that in use confine the ions in the radial direction within the ion guide.
16 Citations
20 Claims
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1. An ion analysis apparatus comprising an ion guide having an ion optical axis extending from an ion inlet to an ion outlet, the ion guide being configured to guide ions from the ion inlet to the ion outlet along the ion optical axis,
wherein the apparatus includes ion axial guide that in use causes the ions to move along the ion optical axis, wherein the ion guide comprises at least one extraction region located between the ion inlet and the ion outlet, the at least one extraction region being configured to extract ions moving along the ion optical axis of the ion guide in an extraction direction, the extraction direction being substantially orthogonal to the ion optical axis of the ion guide, wherein the apparatus includes an ion radial confinement device that in use confines the ions in the radial direction within the ion guide, said ion radial confinement device comprising a first ion radial confinement device associated with a portion of the ion guide located before the extraction region and a second ion radial confinement device associated with the at least one extraction region, and wherein the extraction region is switchable between: -
an extraction mode in which the extraction region has an extraction field to extract ions from the extraction region while ions are being moved along the ion optical axis by the ion axial guide in other portions of the km guide; and a transmission mode in which the extraction region has a transmission field to allow ions to move through the extraction region salting the ion optical axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of extracting ions in an ion analysis apparatus, the said ion analysis apparatus comprising an ion guide having an ion optical axis extending from an ion inlet to an ion outlet, the ion guide being configured to guide ions from ion inlet to the ion outlet along the ion optical axis,
wherein the apparatus includes ion axial guide that in use causes the ions to move along the ion optical axis, wherein the ion guide comprises at least one extraction region located between the ion inlet and the ion outlet, the at least one extraction region being configured to extract ions moving along the ion optical axis of the ion guide in an extraction direction, the extraction direction being substantially orthogonal to the ion optical axis of the ion guide, wherein the apparatus includes an ion radial confinement device that in use confines the ions in the radial direction within the ion guide, said ion radial confinement device comprising a first ion radial confinement device associated with a portion of the ion guide located before the extraction region and a second ion radial confinement device associated with the at least one extraction region, and wherein the extraction region is switchable between: -
an extraction mode in which the extraction region has an extraction field to extract ions from the extraction region while ions are being moved along the ion optical axis by the ion axial guide in other portions of the ion guide; and a transmission mode in which the extraction region has a transmission field to allow ions to move through the extraction region along the ion optical axis, the method comprising the steps of; using the ion radial confinement device to radially confine ions within the ion guide, and switching the extraction region from the transmission mode to the extraction mode thereby extracting ions from the extraction region in an extraction direction substantially orthogonal to the ion optical axis while ions are being moved along the ion optical axis by the ion guide in other portions of the ion guide. - View Dependent Claims (20)
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Specification