Abstract:
An asymmetric field ion mobility spectrometer (10) with ionization source (18) for ionizing a sample media and creating ions. An ion filter (24) is disposed in the analytical gap downstream from the ionization source for creating an asymmetric electric field to filter the ions. An ion flow generator for creating an electric field in a direction (26) transverse to the asymmetric electric field and which propels the ions through the asymmetric electric field towards a detector (32).
Abstract:
A quadrupole mass spectrometer comprises an ion source (20), a mass filter (22) and an ion collector (24). The ion source comprises an array (30) of quantum wires. The mass filter comprises four glass fibres (32) coated with nickel and the ion collector is an a electrode connected to an integrated complementary metal oxide semiconductor temperature compensated integrated amplifier.
Abstract:
A solid state mass spectrograph includes an inlet, a gas ionizer, a mass filter and a detector array all formed within a cavity in a semiconductor substrate. The gas ionizer can be a solid state electron emitter with ion optics provided by electrodes formed on apertured partitions in the cavity forming compartments through which the cavity is evacuated by differential pumping. The mass filter is preferably a Wien filter with the magnetic field provided by a permanent magnet outside the substrate or by magnetic film on the cavity walls. The electric field of the Wien filter is provided by electrodes formed on walls of the cavity. The detector array is a linear array oriented in the dispersion plane of the mass filter and includes converging electrodes at the end of the cavity serving as Faraday cages which pass charge to signal generators such as charge coupled devices formed in the substrate but removed from the cavity.
Abstract:
A microelectronic field ionizer and alternate fabrication procedures for the same are described. The field ionizer has an array of small diameter gas outlets in the form of microvolcanos. A counterelectrode layer of material is provided on the microelectronic substrate, in registration with the gas outlets.
Abstract:
A nebulizer assembly (10) particularly well adapted as a liquid chromatograph/mass spectrometer (LC/MS) interface including a pair of nebulizer plates (12,14), a base (16), and a cap (18) for tightly holding the nebulizer plates (12,14) against the base (16). A first nebulizer plate (12) has a centrally located outlet orifice (22) and a radially extending groove (24), and the second plate (14) has a centrally located gas inlet orifice (32) and a radially displaced liquid inlet orifice (34). The gas inlet orifice (32) aligns with the outlet orifice (22) and an aperture (20) provided in the cap (18), and the liquid inlet orifice (34) aligns with a section of the groove (24) provided in the first nebulizer plate (12). When the gas inlet orifice (32) is coupled to a pressurized gas source and the liquid inlet orifice (34) is coupled to a pressurized liquid source, uniform droplets (74) having a diameter of approximately 10 microns can be formed from an outlet orifice (22) twice that diameter.
Abstract:
La présente invention concerne un générateur (0) d'un faisceau d'ions, comportant : - une chambre d'ionisation (10) dotée d'une entrée (1) d'un fluide à ioniser, - une source (S) de particules ionisantes configurées pour impacter le fluide dans une zone d'impact (9) de la chambre d'ionisation (10) de sorte à générer des ions, - un extracteur d'ions générés en direction d'une zone de sortie du générateur, caractérisé en ce que l'extracteur comprend au moins deux électrodes (5a,5b,5c) configurées pour générer un gradient de tension dans la zone d'impact, (9) le gradient de tension tendant à diriger les ions générés vers la zone de sortie du générateur.
Abstract:
A method for forming a miniature skimmer cone for a free jet expansion vacuum interface is disclosed. The skimmer cone is formed from electroplated metal, deposited inside a blind hole formed on a silicon substrate. The substrate is partially removed to expose the skimmer cone, together with other features formed by etching, and an outlet orifice is formed. A complete miniature vacuum interface is formed from the stacked assembly of a part containing an inlet orifice, a spacer, and the part containing a skimmer cone described above, mounted in an intermediate pressure chamber at the inlet to a mass spectrometer.
Abstract:
Apparatuses, systems, and methods for ion traps are described herein. One apparatus includes a number of microwave (MW) rails (110) and a number of radio frequency (RF) rails (108) formed with substantially parallel longitudinal axes and with substantially coplanar upper surfaces. The apparatus includes two sequences of direct current (DC) electrodes (106) with each sequence formed to extend substantially parallel to the substantially parallel longitudinal axes of the MW rails (110) and the RF rails (108). The apparatus further includes a number of through-silicon vias (TSVs) (115) formed through a substrate (105) of the ion trap (100) to provide an electrical potential to DC electrodes (106) and a trench capacitor (116) formed in the substrate (105) around at least one TSV (115).