Patent classifications
H01J49/065
DEVICE FOR MANIPULATING CHARGED PARTICLES
The present invention is concerned with a device for charged particle transportation and manipulation. Embodiments provide a capability of combining positively and negatively charged particles in a single transported packet. Embodiments contain an aggregate of electrodes arranged to form a channel for transportation of charged particles, as well as a source of power supply that provides supply voltage to be applied to the electrodes, the voltage to ensure creation, inside the said channel, of a non-uniform high-frequency electric field, the pseudopotential of which field has one or more local extrema along the length of the channel used for charged particle transportation, at least, within a certain interval of time, whereas, at least one of the said extrema of the pseudopotential is transposed with time, at least within a certain interval of time, at least within a part of the length of the channel used for charged particle transportation.
DEVICE FOR RAPID EXCHANGE OF ION SOURCES AND ION TRANSMISSION DEVICES
A mass spectrometer is disclosed comprising a rotatable isolation valve 1 having a curved, spherical, cylindrical or concave portion. At least a portion of an ion guide 2 is positioned so as to extend within a swept volume of the isolation valve 1 enabling the ion guide 2 to be positioned close to a second downstream ion guide 3 and for ions to be transmitted from the first 2 ion guide to the second ion guide 3 with high ion transmission efficiency.
CURVED ION GUIDES AND RELATED SYSTEMS AND METHODS
An ion guide includes a plurality of lenses arranged in series along a curved central axis. Each lens includes a body and a central opening, and the central openings of the plurality of disks define a curved ion guide region. The ion guide includes an ion deflector configured to apply a radial DC electric field across the ion guide region and along the curved central axis. The ion deflector includes at least one DC voltage source that is configured to apply a positive DC voltage to at least some of the plurality of lenses and a negative DC voltage to at least some of the plurality of lenses.
Mass spectrometer
A mass spectrometer is disclosed comprising an ion optics device housing having one or more external electrical connectors (1719) provided thereon. An ion optics device (301) is arranged inside the ion optics device housing, the ion optics device (301) comprising one or more electrodes for manipulating ions, the one or more electrodes being electrically connected to the one or more external electrical connectors (1719) provided on the ion optics device housing. A voltage supply housing (1717) is provided having one or more external electrical connectors provided thereon. One or more voltage supplies are arranged inside the voltage supply housing (1717), the one or more voltage supplies being in electrical communication with the one or more external electrical connectors provided on the voltage supply housing. The one or more external electrical connectors provided on the voltage supply housing are directly physically and electrically connected to the one or more external electrical connectors (1719) provided on the ion optics device housing.
METHOD AND ION GUIDE ASSEMBLY FOR MODULATING A STREAM OF IONS
The invention relates to a method for, in an ion guide (10), modulating a stream of ions according to a modulation function, wherein the stream of ions includes at least N different ion species, wherein N is at least 1. This ion guide (10) forms an ion guide path, wherein the ions of the stream of ions are conveyed along the ion guide path in a conveying direction to form the stream of ions. The ion guide (10) includes an ion gate (12) arranged at an ion gate position on the ion guide path, wherein the ion gate (12) is adapted to provide an open state for allowing the ions passing the ion gate position when being conveyed along the ion guide path and a closed state for preventing the ions from passing the ion gate position. The ion guide (10) further includes a first arrangement (13) of conveying electrodes (230) arranged along the ion guide path, the first arrangement (13) of conveying electrodes (230) extending over a first section of the ion guide path, wherein the first section of the ion guide path reaches from at least the ion gate position downstream to at least a transition position on the ion guide path, wherein the first arrangement (13) of conveying electrodes (230) is adapted for generating first travelling waves having a first travelling wave amplitude and travelling along the first section of the ion guide path at a first travelling wave velocity for conveying the ions along the first section of the ion guide path. Furthermore, the ion guide (10) includes a second arrangement (14) of conveying electrodes (240) arranged along the ion guide path, the second arrangement (14) of conveying electrodes (240) extending over a second section of the ion guide path, wherein the second section of the ion guide path reaches from the transition position downstream, wherein the second arrangement (14) of conveying electrodes (240) is adapted for generating second travelling waves having a second travelling wave amplitude and travelling along the second section of the ion guide path at a second travelling wave velocity for conveying the ions along the second section of the ion guide path. According to the method, the stream of ions is modulated with the ion gate (12) according to the modulation function and AC voltages are applied to the first arrangement (13) of conveying electrodes (230) for generating the first travelling waves and to the second arrangement (14) of conveying electrodes (240) for generating the second travelling waves for conveying the ions downstream of the ion gate (12<
Ion guide with varying multipoles
An ion guide includes electrodes elongated along an axis from an entrance end to an exit end and spaced around the axis to surround an interior. The electrodes have polygonal shapes with inside surfaces disposed at a radius from the axis and having an electrode width tangential to a circle inscribed by the electrodes. An aspect ratio of the electrode width to the radius varies along the axis. The electrodes are configured to generate a two-dimensional RF electrical field in the interior having a multipole composition comprising one or more lower-order multipole components and one or more higher-order multipole components and varying along the axis in accordance with the varying aspect ratio, and having an RF voltage amplitude that varies along the axis.
ION GUIDE WITH VARYING MULTIPOLES
An ion guide includes electrodes elongated along an axis from an entrance end to an exit end and spaced around the axis to surround an interior. The electrodes have polygonal shapes with inside surfaces disposed at a radius from the axis and having an electrode width tangential to a circle inscribed by the electrodes. An aspect ratio of the electrode width to the radius varies along the axis. The electrodes are configured to generate a two-dimensional RF electrical field in the interior having a multipole composition comprising one or more lower-order multipole components and one or more higher-order multipole components and varying along the axis in accordance with the varying aspect ratio, and having an RF voltage amplitude that varies along the axis.
COMPLEMENTED ION FUNNEL FOR MASS SPECTROMETER
A mass spectrometry method comprises: (a) introducing ions and gas into a first electrode section of an ion transport apparatus along an axis, the ion transport apparatus further comprising a second electrode section including: a plurality of stacked, mutually parallel ring or plate electrodes; and an ion outlet aperture configured to receive the ions from the second electrode section and to transfer the ions to the vacuum chamber; (b) providing only non-oscillatory voltages to electrodes of the first electrode section of the ion transport apparatus that divert motion of the ions away from that axis and towards an entrance aperture of the second electrode section; (c) transporting the ions through the second electrode section to and through the ion outlet aperture to the vacuum chamber; and (d) removing a major portion of the gas through an exhaust port that is offset from the ion outlet aperture.
Atmospheric pressure ion focusing device employing nonlinear DC voltage sequences
Apparatus comprise an electrode arrangement comprising a plurality of electrodes defining a volume, an ion entrance, and an ion exit, and a voltage source coupled to the plurality of electrodes and configured to apply a nonlinear DC voltage sequence to the electrodes between the ion entrance and the ion exit that directs ions through the volume with the volume at a pressure of at least 1 Torr. Ions can be focused using nonlinear DC voltage sequences, including at atmospheric pressure. Related methods are also disclosed.
Ion focusing device
Apparatus include a plurality of electrode arrangements spaced apart from each other opposite an ion propagation axis and defining an ion transfer channel that extends along the ion propagation axis that tapers between an input end that is situated to receive ions and an output end that is situated to couple the received ions to an input end of an ion guide. Methods include positioning a plurality of electrode arrangements at oblique angles opposite an ion propagation axis so as to form a ion transfer channel that tapers between an input end and an output end, and coupling the output end of the ion transfer channel to an input end of an ion optical element so as to direct ions in the ion transfer channel into the ion optical element. Related systems are also disclosed.