Abstract:
An annular ion guide is disclosed comprising inner 5 and outer 4 electrodes. Ions are confined within an annular ion guiding region by RF or pseudo-potential barriers in both an outward and inward radial direction.
Abstract:
A miniature electrode apparatus is disclosed for trapping charged particles, the apparatus including, along a longitudinal direction: a first end cap electrode; a central electrode having an aperture; and a second end cap electrode. The aperture is elongated in the lateral plane and extends through the central electrode along the longitudinal direction and the central electrode surrounds the aperture in a lateral plane perpendicular to the longitudinal direction to define a transverse cavity for trapping charged particles.
Abstract:
A miniature electrode apparatus is disclosed for trapping charged particles, the apparatus including, along a longitudinal direction: a first end cap electrode; a central electrode having an aperture; and a second end cap electrode. The aperture is elongated in the lateral plane and extends through the central electrode along the longitudinal direction and the central electrode surrounds the aperture in a lateral plane perpendicular to the longitudinal direction to define a transverse cavity for trapping charged particles.
Abstract:
An apparatus for a mass spectrometer comprises: a set of four rod electrodes defining an ion occupation volume therebetween having entrance and exit ends, at least one of the rod electrodes having a slot passing therethrough; first and second ion optics disposed adjacent to the entrance and exit ends, respectively; a voltage supply system; and at least one supplemental electrode disposed at least partially within the at least one slot, wherein the voltage supply system is configured so as to supply a radio-frequency (RF) voltage, a direct-current (DC) filtering voltage and an oscillatory dipole resonant ejection voltage across members of the set of rod electrodes and so at to supply a secondary ion-trapping radio RF voltage and a secondary DC filtering voltage to the at least one supplemental electrode and to supply DC voltages across the rod electrodes and each of the first and second ion optics.
Abstract:
An annular ion guide is disclosed comprising inner 5 and outer 4 electrodes. Ions are confined within an annular ion guiding region by RF or pseudo-potential barriers in both an outward and inward radial direction.
Abstract:
A device for detecting the trace amounts of organic components, which is a device for detecting an organic halide concentration in a gas, and which comprises a capillary column (54) as a sample introducing means for introducing a collected sample (51) continuously into a vacuum chamber (52) as a leaking molecular beam (53), a laser irradiating means (56) for irradiating the leaking molecular beam (53) with a laser beam (55) for laser-ionizing, a converging unit (56) consisting of a plurality of ion electrodes for converging laser-ionized molecules, an ion trap (57) for selectively concentrating the converged molecules, and a time-of-flight mass spectrometer (60) that reflects emitted ions at a specified cycle by means of a reflectron (58) and is provided with an ion detector (59) for detecting reflected ions.
Abstract:
There is provided a quadrupole ion trap mass spectrometer of the type having a plurality of ring electrodes and defining a trapping volume (19). The quadrupole potential faults arising from apertures in the electrodes are corrected by an apertured shim electrode (41, 42) placed within and spaced from the walls of the electrode apertures (16, 18).