86results about "Tube electrostatic deflection" patented technology

An apparatus for spectrometry that includes a spectrometer configured for second order focusing and capable of 2π azimuthal collection.

An ion guide includes a plurality of curved electrodes and an ion deflecting device. The electrodes are arranged about and radially spaced from a central curved axis, and circumscribe a curved ion guide region from an ion entrance to an ion exit. The ion deflecting device may include a device for applying a DC electric field to one or more electrodes in a radial direction. The magnitude of the DC electric field, and thus the ion deflecting force, varies along the curved axis. The ion guide may for example operate as a collision cell or like instrument.

An orthogonal ion injection apparatus and process are described in which ions are directly injected into an ion guide orthogonal to the ion guide axis through an inlet opening located on a side of the ion guide. The end of the heated capillary is placed inside the ion guide such that the ions are directly injected into DC and RF fields inside the ion guide, which efficiently confines ions inside the ion guide. Liquid droplets created by the ionization source that are carried through the capillary into the ion guide are removed from the ion guide by a strong directional gas flow through an inlet opening on the opposite side of the ion guide. Strong DC and RF fields divert ions into the ion guide. In-guide orthogonal injection yields a noise level that is a factor of 1.5 to 2 lower than conventional inline injection known in the art. Signal intensities for low m/z ions are greater compared to convention inline injection under the same processing conditions.

Methods and analysers useful for time of flight mass spectrometry are provided. A method of separating charged particles comprises the steps of: providing an analyser comprising two opposing mirrors each mirror comprising inner and outer field-defining electrode systems elongated along an axis z, the outer system surrounding the inner and defining therebetween an analyser volume, the mirrors creating an electrical field within the analyser volume comprising opposing electrical fields along z, the strength along z of the electrical field being a minimum at a plane z=0; causing a beam of charged particles to fly through the analyser, orbiting around the z axis within the analyser volume, reflecting from one mirror to the other at least once thereby defining a maximum turning point within a mirror; the strength along z of the electrical field at the maximum turning point being X and the absolute strength along z of the electrical field being less than |X|/2 for not more than ⅔ of the distance along z between the plane z=0 and the maximum turning point in each mirror; separating the charged particles according to their flight times; and ejecting at least some of the charged particles having a plurality of m/z from the analyser or detecting the at least some of charged particles having a plurality of m/z, the ejecting or detecting being performed after the particles have undergone the same number of orbits around the axis z.

An ion transfer assembly for transferring ions from an atmospheric pressure ion source into an ion trap mass spectrometer with reduced random noise during analysis of the transferred ions. A method of reducing noise due to charged particles, undesolvated charged droplets, or ions in an ion trap mass spectrometer connected to an atmospheric pressure ionization source.

A device for separating, enriching and detecting ions comprises: a gas tube, in which a carrier gas flows at a uniform rate; an ion source; multiple electrodes provided in the gas tube and applied with electric voltages respectively, so that at least an electric field is produced along the axis of the gas tube; an ion detector; and an ion extraction channel, by which specific enriched ions will be guided across the side wall of the gas tube toward the ion detector and be analyzed. The device enriches ions utilizing the following characteristic: compound ions with specific ion mobility maintain a dynamic balance for a period of time in a flow field under the combination of a carrier gas and a suitable electrical field against the direction of the carrier gas. Simultaneously, multiple compound particles with different ion motilities can be separated and enriched at positions with different electrical field intensities in a flow field in the same manner. The device also comprises synchronously export latitudinally enriched ions at different positions in a flow field, and performs later mass analysis using a mass spectrometer.

The present invention provides a measurement device used for space ions and neutral atoms. The measurement system comprises an ion deflection system, a neutral atom ionization deflection system, an electrostatic analyzer, a flight time system, an electronics processing unit and a device shell. The back-end electrostatic analyzer, the flight time system and the electronics processing unit are shared to measure the ions generated by ionizing the neutral atoms and the ions radiated from the space directly, the measurement of the space ions and the neutral atoms is integrated in a probe, and the as much as possible measurement parts are shared, so that the weight and the power consumption of the device are reduced furthest, the requirements for the satellite platform resources are also reduced, and the fields to which the device is applied are expanded. The measurement device of the present invention has the wide application demands both in the terrestrial space field and the deep space exploration field.

A system includes an electrostatic lens positioned between a charged-particle source and a detector. The lens includes: a first electrode having a first aperture in the path and aligned with a first axis; a second electrode in the path between the first electrode and the charged-particle detector, the second electrode having a second aperture positioned in the path and aligned with a second axis parallel to the first axis and displaced from the first axis along a first direction; a third electrode in the path between the first electrode and the second electrode; and a potential generator coupled to the first, second, and third electrodes.; During operation, the potential generator applies first, second, and third potentials to the first, second, and third electrodes, respectively, so that the electrostatic lens directs a beam of charged particles from the charged-particle source propagating along the first axis to propagate along the second axis.

Instruments are disclosed for analyzing ions from about 1000 to 10,000,000 Daltons by controlling a gaseous medium through which the ions travel under the influence of an electric field so that properties of the ions, such as diameter, electrical mobility, and charge, are measured. One embodiment of the disclosed instruments include an ion source, a nozzle, a jet relaxation region, an ion accumulation region, an electronic gate, a flow chamber and an ion detector.

The invention provides apparatus and methods for performing time-of-flight (TOF) mass spectrometry. A TOF mass spectrometer of the present invention comprises one or more ion focusing electric sectors. At least one of the electric sectors is associated with an ion optical element. The ion optical elements comprise at least one adjustable electrode, such that the adjustable electrode is able to modify the potential experienced by an ion entering or exiting the electric sector with which it is associated.

An ion guide system includes an ion guide with pole rods, a device for laterally introducing ion species, and a mass spectrometer for analyzing product ions of reactions between different ion species. The device is configured and positioned such that an RF field with at least two-fold rotational symmetry with respect to the axis is generated. The device includes shortened pole rods and/or further electrodes. The pole rods and the further electrodes have at least two-fold rotational symmetry. The symmetry of the RF field allows ions to travel straight ahead through the ion guide with no hindrance. Such arrangements are particularly suitable for bringing together largely loss-free positive and negative ion species for reacting them. The reactions may be used to fragment multiply charged biopolymer ions by electron transfer or to remove excess charges of multiply charged biopolymer ions.

The present invention relates to inductively coupled plasma mass spectrometry (ICPMS) in which a collision cell is employed to selectively remove unwanted artefact ions from an ion beam by causing them to interact with a reagent gas. The present invention provides a first evacuated chamber (6) at high vacuum located between an expansion chamber (3) and a second evacuated chamber (20) containing the collision cell (24). The first evacuated chamber (6) includes a first ion optical device (17). The collision cell (24) contains a second ion optical device (25). The provision of the first evacuated chamber (6) reduces the gas load on the collision cell (24), by minimising the residual pressure within the collision cell (24) that is attributable to the gas load from the plasma source (1). This serves to minimise the formation, or re-formation, of unwanted artefact ions in the collision cell (24).