In one aspect, an ion trap is disclosed, which includes a curved linear ion trap having a plurality of electrodes arranged around a central curved axis so as to provide a volume for trapping ions, said plurality of electrodes comprising at least one inner electrode and at least one outer electrode radially separated from said inner electrode. The ion trap further includes a pair of inner and outer ion guide electrodes providing a volume therebetween for receiving ions ejected from said curved ion trap and guiding the ejected ions to one or more spatial locations along a focal line, said inner and outer ion guide electrodes being positioned external to said ion trapping volume and in proximity of said at least inner and outer electrodes of the curved ion trap, respectively, wherein a DC voltage is applied between said ion guide electrodes to provide an electric filed therebetween for guiding the ejected ions to said spatial locations.

A multipole assembly configured to be disposed in a mass spectrometer includes a plurality of rod electrodes. Each rod electrode included in the plurality of rod electrodes may be made of molybdenum. The multipole assembly further includes a sacrificial anode in electrical contact with a rod electrode included in the plurality of rod electrodes. The sacrificial anode is made of a material having an electrochemical potential that is more negative than the electrochemical potential of the rod electrode.

A cleaning device for cleaning electrodes of an ion optical multipole device comprises at least one substantially longitudinal cleaning section, at least one handling section extending axially from the at least one cleaning section and at least one direction section extending axially from the at least one cleaning section. The at least one cleaning section has a larger cross section than the at least one handling section. The at least one direction section is capable of allowing a longitudinal movement of the cleaning device in a first axial direction and resisting a longitudinal movement of the cleaning device in a second, opposite axial direction

A mass filter is disclosed having at least one electrode (42-48) comprising an aperture (43) or recess. Voltages are applied to the electrodes (42-48) of the mass filter such that ions having mass to charge ratios in a desired range are confined by the electrodes and are transmitted along and through the mass filter, whereas ions (47,49) having mass to charge ratios outside of said desired range are unstable and pass into the aperture (43) or recess such that they are filtered out by the mass filter. The aperture (43) or recess reduces or eliminates the number of ions that would otherwise impact the electrode surface facing the ion transmission axis and hence reduces degradation of the ion transmission properties of the mass filter.

Provided is an ion transport device 1 including: a drift tube 10 having a plurality of ring-shaped electrodes 11 arranged in an axial direction; a housing 30 containing the drift tube 10; a drift-tube support member 21 supporting the drift tube 10 in relation to the housing 30; a detector 20 fixed to the drift tube 10 and configured to detect ions; and a vibration damper 22 provided on the drift-tube support member 21 and configured to absorb vibration which the drift-tube support member 21 receives from the housing 30. By such a configuration, an occurrence of noise in a detection signal of the detector 20 due to an influence of the vibration can be prevented.

An octa-electrode linear ion trap mass analyzer is formed by eight cylindrical electrodes and at least two end-cap electrodes. The inside surfaces of the eight cylindrical electrodes are free-form. The material of the octa-electrode linear ion trap mass analyzer is a conductive metal material or an insulating material plated with a conductive coating. The eight cylindrical electrodes are divided into four groups of cylindrical electrodes in total, each group of the four groups of cylindrical electrodes comprises two cylindrical electrodes, and each two groups of the four groups of cylindrical electrodes are parallelly placed. At least one through hole is provided with in the center of the end-cap electrode, and the two end-cap electrodes are respectively arranged at both ends of the cylindrical electrode.

A multipole assembly configured to be disposed in a mass spectrometer includes a plurality of elongate electrodes arranged about an axis extending along a longitudinal trajectory of the plurality of elongate electrodes and configured to confine ions radially about the axis, and a piezoelectric actuator configured to adjust a position of a first electrode included in the plurality of elongate electrodes.

The invention provides a mass spectrometer, an ion optical device, and a method for ion manipulation in a mass spectrometer. The mass spectrometer includes a mass analyzer; and an ion guiding device, including two electrode arrays positioned in parallel with each other, each electrode array including at least two ring electrodes concentrically disposed or at least three linear electrode assemblies having a radial distribution; and a power supply means, configured to apply a voltage on at least a part of the ring electrodes, to form a radio-frequency electric field and a DC electric field. By means of the radio-frequency electric field and the DC electric field, ions are allowed to be stored in a region between the two arrays, and controlled to be sequentially released along a radial direction according to a preset mass-to-charge ratio requirement, then exit the ion guiding device and enter the mass analyzer for mass analysis.

Components of scientific analytical equipment and to complete items of analytic equipment. An apparatus and methods useful for detecting an ion in mass spectrometry applications are provided. The apparatus may include an electron multiplier having a high sensitivity and low sensitivity sections, or the combination of an electron multiplier with a separately powered conversion dynode (and particularly a high energy conversion dynode), or the combination of a conversion dynode that is physically incorporated within or about an electron multiplier.

A multipole ion guide includes a plurality of electrodes disposed about a longitudinal axis of the device so as to define an ion transmission volume for transmitting ions along a length of the device between opposite inlet and outlet ends. An electronic controller is operably connected to an RF power source and to at least some of the electrodes and is configured to apply at least an RF potential to the electrodes. During use the electrodes generate an RF-only field along a first portion of the device and an axial DC field along a second portion of the device. Ions are focused radially inward toward the longitudinal axis of the device by the RF-only field within the first portion of the device prior to and/or subsequent to experiencing the axial DC field within the second portion of the device.