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Device contains an ionising source chamber with the central opening, an ion inlet element, an ion-drift zone unit with the central tube of the chamber, a shield grid and Faraday disc, at that the ionising source chamber with the central opening, the ion inlet element, the ion-drift zone unit, the shield grid and Faraday disc are connected in series in front-to-rear direction. At that the ion-drift zone unit contains the first insulator and the first metal plates of electrodes fixed concentrically to the front and rear surface of the first insulator. The ion-drift zone unit contains the first insulator and the first metal plates of electrodes form an integral unit. |
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Ionic source of glow discharge with increased illumination Glow discharge source includes a hollow anode having a shaped bottom part and a hollow cathode arranged in the anode cavity on the side of its open end, which are coaxial and cylindrical and arranged with a gap, and together form a discharge chamber. The chamber outlet is an axial hole for extraction of ions and pumping, which is formed in the bottom part of the hollow anode. The anode bottom part profile has the possibility of simultaneous self-focusing of an electron flow from the hollow cathode to an axial hole zone of the discharge chamber and formation of a parabolic electric field at the chamber outlet; with that, the anode bottom part facing inside the chamber has the shape of a convex cone and the part facing outside the chamber has a surface of a concave spherical shape. |
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Timespan mass spectrometer with non-linear reflector Timespan mass spectrometer with a non-linear reflector comprises a drift tube, a source of ions, an accelerating net, a source of current and voltage, a source of pulse voltage that varies in time, a net that limits the non-linear reflector, a non-linear reflector and a receiver of ions in the form of a microchannel plate. The non-linear reflector is made in the form of a set of rings of various diameter, the source of current and voltage is connected to rings, the source of pulse voltage that varies in time is connected to the accelerating net, the drift tube and the net that limits the non-linear reflector are grounded. |
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Cyclic mass-spectrometer of gas particles Cyclic mass spectrometer of gas particles comprises a receiver of ions, three toroidal deflectors, a unit of processing of ion spectra and grounded nets is additionally equipped with an ion source, connected to a unit of spectra processing, a pushing net connected to a generator of pushing pulses, a diverting electrode, connected to a generator of diverting pulses, a generator of diverting voltage of toroidal deflectors connected to external reflecting electrodes, voltage generators are connected to a synchronisation device, toroidal deflectors are arranged one after another and provide for cyclic flight of ions. In the drift space there are levelling nets and a focusing device, which represent quadripoles or focusing rings. |
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Differential ion mobility spectrometer Differential ion mobility spectrometer has a cylindrical chamber for generating analyte ions, an ionisation source, in the region of which there is generation of reactant ions, an electrode system, an ion aperture, an analytical gap formed by two concentric cylindrical electrodes, an ion detector, a periodic polarity-asymmetric voltage generator, which provides an output on a section of a nonlinear field relationship of ion mobility, a compensating voltage source, a high-frequency voltage source, concentrically arranged relative the inner cylindrical electrode of an additional chamber, having an input and an output for ionising gas, in which there is an ionisation source and an ejecting voltage source is connected. |
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In order to prevent excessive loss of analysed ions, inner walls of input and output diaphragms are divided into segments and alternating or variable voltage is applied to said diaphragms. Mass spectra of product ions during collision-induced dissociation are recorded using a mass analyser which is interfaced with a trap, particularly on a time-of-flight mass analyser with orthogonal ion input. |
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Source of ions for mass spectrometer (versions) Source of ions for a mass spectrometer according to the first version comprises a chamber (1), in the first end (2) of the chamber (1) there is a hole (3), in which a device (4) of sample electric sputtering is located. In the side wall (5) of the chamber (1) near the first end (2) there is at least one pipe (7) installed along the tangent to the side wall (5), for supply of heated compressed gas into the chamber (1). In the second end (9) of the chamber (1) there is the first electrode (11) with a central hole (12) for release of ions surrounded by the second electrode (13) with a hole (14) in the central area, formed with the first electrode (9) an electrostatic focusing lens for ions (15). In the side wall (5) of the chamber (1) there is at least one hole (13) for release of gas and non-evaporated drops of the sample, distant from the second end (8) by the distance d, which meets a certain ratio. According to the second version a hole (44), in which the device (4) is located for electric sputtering of the sample, is made in the side wall (43) of the chamber (40), and in the first end (41) of the chamber (40) there is a hole (42) for gas release. |
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Method of peptide sequencing by mass-spectrometry and defining of their amino acid sequences Method of peptide sequencing by mass-spectrometry and defining of their amino acid sequences is based on fragmentation in mass-spectrometer ion source between the nozzle and skimmer for molecular ions of peptides under the action of controlled electric field and subsequent mass-spectrographic analysis of fragments. Peptide comes to the ion source which electrogasdynamic system allows control of fragmentation degree for molecular ion by means of electric field changing. Further ions are divided in mass analyser and delivered to detector where mass spectrum of the peptide and its fragments with different fragmentation depth in the same spectrum is registered. Mass spectra of the peptide fragments obtained at different values of the electric field force are processes by the recording system, analysed and amino acid sequence is defined for the source peptide in result. Controlled degree of fragmentation in the ion source under action of the varied electrical field within the range of 102-104 V/m and residual gas pressure within the range of 100-2000Pa allows determination of amino acid sequence of peptides containing up to 10-15 amino acid residues which corresponds to an average length of peptides, products of protein enzymatic hydrolysis. |
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Proposed method is based on formation on flat surfaces of discrete linear distributions of high-frequency potential by means of parallel capacitance dividers. The system consists of three flat electrodes, one electrode is earthed and two other electrodes have opposite-phase discrete linear distributions along one axis of high-frequency potentials. Discrete electrodes are made of thin dielectric plates with conducting surfaces applied to them. Outer surfaces are separated diagonally into two halves, one of which is earthed, and high-frequency potentials are applied to the other ones. Inner surfaces that are not connected galvanically to other parts of an analyser, are formed of conducting strips uniformly distributed along one axis. Capacitance dividers of high-frequency voltage with a division coefficient linearly changing along one coordinate are formed between inner and outer conducting surfaces. |
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Device for generation of forceful ion fluxes Device for generation of forceful ion fluxes consists of vacuum chamber with ion source and two electrodes - anode and cathode, between them potential difference is created. Ion source is designed as a tank with fluid connected to heating element or to cryogenic system, inside of which there installed is anode; anode and the tank walls are located with a gap providing capillary movement of fluid flow from the tank; cathode is designed as a plate with a slot located above anode designed as a system of coaxial cylinders arranged with a gap relative to each other; and cathode is designed as a plate with system of slots. |
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Method for formation of two-dimensional liner electric field and device for its implementation Method for formation of two-dimensional linear electric fields consists in formation of one coordinate of potential average value distribution per working area border using device from flat discrete and hyperbolic electrodes. Flat discrete electrodes consist of thin earthed metal fibres evenly arranged on area borders, and hyperbolic electrodes singly arranged in each quadrant have small sizes of half-axes. Under impact of opposite potentials on adjacent hyperbolic electrodes in planes of discrete electrodes there formed are linear per each axis of potential average value distribution, under their impact in working area there formed is two-dimension linear field. |
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Method of measuring gases and corresponding ion mobility spectrometry Method includes steps of ionising a sample gas in a gas flow (10), directing the ionised gas flow through an elongated ion-mobility measuring chamber (12) defined in the cross-section, filtering (14) ions from the ionised gas flow at a distance from measuring electrodes (e1, e2, e3), allowing passage of only ions coming from a selected point of the cross-section of the flow, separating ions (J1-n) with differing ion mobilities in the measuring chamber (12) using a transverse static electric field and at least one pair of measuring electrodes (e1, e2, e3) built-in along the wall of the measuring chamber. |
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Mass-spectral device for quick and direct analysis of samples In a mass spectral device for quick and direct analysis of samples, comprising an ioniser, representing a hollow cathode with a pulse glow discharge, placed into a gas-discharge chamber with inert gas and a time-of-flight mass spectrometer, the hollow cathode is an assembled structure made of two composite parts placed into a pumped cylinder, the end of which with the help of an elastomer vacuum toroidal seal is pressed to the surface of a quartz disc, being a part of a discharge cell, besides, one of the parts of the hollow cathode is a hollow cylinder made of a monoisotope metal and is rigidly fixed in a jacket of the proposed device, and the second part is made in the form of a holder, besides, for analysis of dry residue of solutions, the holder represents a disc made from the same metal, with grooves having spherical surface, and for analysis of solid-state samples - the disc with cylindrical holes, where samples are inserted. |
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Multi-reflection ion-optical device Multi-reflection ion-optical device includes electrostatic field generating means configured to generate an electrostatic field defined by superposition of first and second distributions of electrostatic potential ΦEF, ΦLS. The first distribution ΦEF subjects ions to energy focusing in a flight direction and the second distribution ΦLS subjects ions to stability in one lateral direction, to stability in another lateral direction for the duration of at least a finite number of oscillations in the one lateral direction and to subject ions to energy focusing in the one lateral direction for a predetermined energy range. |
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Bipolar ionisation source includes an ionisation chamber blown by a gas stream containing trace impurities of analysed substances, an ultraviolet source which irradiates the analysed gas, a device for separating and detecting ions connected to the ionisation chamber, a gas stream agitator which enables to convey positive and negative ions in the gas stream from the ionisation chamber to the device for separating and detecting ions. The ionisation chamber further includes an emitter which is blown by the gas stream and emits electrons under the effect of ultraviolet radiation. |
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Basis of the invention is separation of ions from external source according to the mass-to-charge ratio (m/z) in a mass spectrometer with an orbital ion trap without a centre electrode, where a longitudinal ion rotation-averaged electric field which is close to harmonic is formed by applying suitable potential across sections of the surface of the trap. Rotation of the analysed ions is excited when these ions are fed into the cell along its axis by a rotating electric field. Loss of ions on the wall of the cell is prevented by applying an effective potential which arises when ions pass near the surface with alternative potential on its sections. Detection of induced signals from oscillating ions is carried out when the rotating field is turned off, and processing of said signals for relatively wide ranges of m/z is carried out based on fast Fourier transformation. For the selected intervals of m/z, the registered data are approximated with exponentially damped sinusoidal curves whose frequencies characterise m/z of ions, and indices of the damped exponential characterise the average frequency of collision of the analysed ions with atoms and molecules of residual gases. Axial input of ions into the cell enables their accumulation, dissociation, energy analysis and separation according to mass, charge and mobility. |
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Invention relates to separation of ions in a linear radio frequency trap with a gas stream along the axis of said trap based on differences of said ions in appearance energies, mass, charge, mobility, capture cross-sections of slow electrons and metastable excited particles, as well as in efficiency of formation by recharging on ions of a buffer gas when said ions are exposed to alternating and constant electric fields formed inside the trap, including by charges of ions with relatively low m/z, focused around the axis of the trap. In necessary cases, the ions can be additionally separated according to resistance to collision-induced dissociation. The invention is characterised by orthogonal interfacing of the linear radio frequency trap with the subsequent mass analyser using a double-grid electrostatic mirror and pre-detection of ions reflected by said mirror and which do not fall into the mass analyser. |
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Device has reaction region separated from drift region by electrostatic gate. Doping material is fed into reaction region from doping circuit while drift region is not alloyed. Two ion modifiers to create strong field are arranged in drift region, one after another. One modifier to remove alloying adducts from ions or both modifiers may be used to subject ions to fragmentation. |
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Source of ionisation based on barrier discharge In a device for generation of ions, comprising an ionising chamber, including the first electrode, the second electrode arranged opposite to it, and a dielectric element installed between the first and second electrodes and tightly adjacent to the working surface of the first electrode, and also a source of high voltage, according to a utility model, the second electrode is arranged in the form of a metal cap, covering the dielectric element with the first electrode installed on it, besides, the bottom of the second electrode is arranged in the form of a grid, covered with a thin dielectric layer coated at both sides, the area of the working surface of the first electrode is commensurate to the maximum to the area of the grid of the second electrode, and the dielectric element is arranged in the form of the cap and is installed inside the second electrode. |
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Basis of the invention is separating ions from an external source in an ion mobility increment spectrometer (IMIS) with a cylindrical symmetrical shape with a partitioned external electrode, where independently varying dispersion voltage and compensating voltage is applied across sections. These voltages facilitate focusing of the desired ions in the initial section of the drift channel near the middle of the analytical interval of the IMIS, their controlled shift to the outer surface of the external electrode in the middle part of the drift channel and controlled shift to the central electrode in the final part of the drift channel. This enables to primarily transmit desired ions with offset from impurity ions due to their probable dying at electrodes of the IMIS. Surviving ions, under the action of the electric field and a small portion of the gas stream entering the capillary which forms a supersonic gas stream, drift into that capillary and inside the supersonic gas stream coming out of that capillary and enter into the next mass analyser. Separation of signals from all ions focused inside the IMIS is possible based on detecting two-dimensional or four-dimensional distribution of flux density of the detected ions when scanning voltages which shift ions to electrodes of the IMIS. |
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Electrode system of linear ion trap Electrode system of a linear ion trap has four electrodes, each pair oppositely located. Plains of symmetry of electrode pairs are perpendicular to each other. The system differs from prototype in that each electrode of at least one pair has in the cross section substantially the shape of an isosceles triangle. The vertex of the triangle is directed towards the longitudinal axis of the trap. The best result is achieved when angle between lateral sides of the triangle is 130°-152°, i.e, the angle between the working surfaces of the electrodes is 130°-152°. The width of the longitudinal slit for ejecting ions in such an electrode is less than 24% of the inscribed radius of the trap. The disclosed electrode system for a linear ion trap enables to achieve high resolution which is comparable with the resolution of ion traps of hyperbolic electrode section, i.e. significantly higher than can be achieved by the prototype ion trap. At the same time the working surface of electrodes in proposed system is composed of flat surfaces, which are placed at an angle whose vertex is directed towards the axis of the ion trap. Manufacturing of such electrodes is much simpler. An angle in the region of the slit of the electrode compensates for local weakening of the field. |
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Apparatus for manipulating charged particles Apparatus for manipulating charged particles has a set of electrodes arranged to form a channel for movement of charged particles, as well as an electric power supply which applies supply voltage across the electrodes, which enables to form a non-uniform high-frequency electric field in the channel, the pseudopotential of which has one or more local extrema along the length of the channel for movement of charged particles on at least a certain time interval, wherein at least one of said pseudopotential extrema moves in time on at least a certain time interval on at least part of the channel for movement of charged particles. |
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Method of determining isotopic composition of methane Method involves feeding a sample for analysis; converting methane to an analyte in air or oxygen-containing gas; feeding the analyte for analysis; ionising the analyte; isotopic analysis of ions of the analyte using a mass-analyser. The analyte is methanol and conversion is carried out via gaseous electrical discharge. |
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Method of analysing charged particles based on energy mass and apparatus for realising said method Analysis based on energy and mass is carried out in superimposed radial electric field of a Hughes-Rozhansky energy analyser and the magnetic field if a Wien filter and the longitudinal electric field of the Wien filter which lies across said two fields. The Hughes-Rozhansky energy analyser and the Wien filter are merged in a single structure, the Wien filter being cylindrical. The ion detector and the distance between cylindrical plates are determined by focusing conditions of the target ions. |
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Analyser for flight-type quadrupole mass-spectrometer with three-dimensional focusing Analyser has an electrode system and two electrodes which bound the electrode system on the z axis, with two holes in one of said electrodes for inlet and outlet of analysed ions. Coordinate values of the centres of the holes for inlet and outlet of ions on similar coordinate axes are equal in magnitude, but at least one pair of corresponding coordinate values has different signs. |
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Multi-reflecting time-of-flight mass-analyser has two parallel gridless ion mirrors, each having an elongated structure in the direction (Z) of drift. These ion mirrors provide a convoluted ion path formed by multiple reflections of ions in the direction (X) of flight, orthogonal to the direction (Z) of drift. The analyser also has an additional gridless ion mirror for reflecting ions in the direction (Z) of drift. During operation, ions are spatially separated according to the mass-to-charge ratio due to different time of flight along the convoluted ion path and ions having essentially the same mass-to-charge ratio are subject to energy focusing with respect to the direction of flight and drift. |
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Static ion mass analyser comprises a source of ions, a focusing system, an object slot, an aperture diaphragm, energy-dispersed electrostatic sector and magnet sector. The electrostatic sector is installed relative to the magnetic sector so that directions of optical axes rotation in the electrostatic sector and the magnetic sector match each other. The electrostatic sector is installed relative to the source of ions so that the plane of the optical image of the object slot is located between the electrostatic sector and the magnetic sector. In the plane of the optical image of the object slot there is an energy-filtering diaphragm. There is a collimating lens installed between the electrostatic sector and the magnetic sector. |
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Ion mobility spectrometer has a reaction chamber (1), a drift electrode (2) and an ion detector (3). The reaction chamber (1) is fitted with an input port (4) for feeding the analysed substance in a mixture with a carrier gas and a corona discharge source made in form of segment of a hemisphere (5) on whose inner surface facing the drift electrode (2) there are metal spikes (6) with small curvature radius at the apex of the spikes. A controlled grid valve (7) is placed between the ion source and the drift electrode (2). The drift electrode (2) is made from high-resistivity material with resistivity in the range of (0.3-2.0)×104 ohm×m, and is connected to a drift voltage (8) source. An ion detector (3) is placed at the output of the drift electrode (2). |
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Apparatus for orthogonal input of ions into ion-drift or mass-spectrometer Apparatus for separation and orthogonal input of ions is in form of a T-shaped coupling of a gas-dynamic and an input channel, wherein the input channel consists of a diaphragm and an electrostatic lens system. The electrostatic field of the lens system of the orthogonal channel draws ions into the drift region and big droplets fly in the initial direction. |
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Detecting apparatus detects a first part of a beam of charged particles and generates a first output signal based on intensity of the detected first part of the beam of charged particles. The detecting apparatus detects a second part of the beam of charged particles which has traversed a longer trajectory section through a mass-spectrometer than the first part of the beam of charged particles, and generates a second output signal based on the detected second part of the beam of charged particles. A controller controls parameters of the beam of charged particles and (or) detecting apparatus based on the first output signal of the detecting apparatus, so as to control the second output signal of the detecting apparatus. |
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Electrostatic energy analyser with angular resolution Axial-symmetric energy analyser of box type realises the circuit of angular dependencies measurement in the entire range of polar and azimuthal angles with the help of a position sensitive detector. The electron-optical circuit of the energy analyser provides for angular focusing of the fourth order near the central trajectory with an initial polar angle of 90°. Focusing of the fourth order is a criterion of high quality of an energy analyser, since in this case a conflict consisting in simultaneous requirement of high values of illumination and resolution capability compared to the case of focusing with lower orders is considerably weakened. The analyser with energy and angular resolution built in accordance with a proposed circuit may provide for relative energy resolution of less than 0.1% and angular resolution of less than 0.5 degrees, which more than by a factor increases consumer and operational parameters of instruments of such type at considerably more simple configuration of electrodes. |
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Time-of-flight quadrupole mass-spectrometre analyser (mass filter, monopole and tripole type) Time-of-flight quadrupole mass-spectrometre analyser (mass filter, monopole, tripole type) relates to mass-spectrometry and can e used in designing high-resolution and high-sensitivity time-of-flight quadrupole mass-spectrometres. The analyser has a device for sorting ions according to specific charge, a device for inputting the analysed ions into the sorting device and a device for outputting the sorted ions from the sorting device. The input and output devices are in form of double-electrode quadrupole cells which, along with a quadrupolar field, can generate a longitudinal (along axis z) uniform electric field, the electrodes of which are electrically insulated from each other, where the working surfaces of the electrodes of the quadrupole cells are defined within the operating volume of the cell by certain ratios. |
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Method for time-of-flight separation of ions according to mass and device for realising said method Method is based on adding a slowly varying exponential component to an alternating electric field, under the effect of which oscillation of ions in the direction perpendicular the axis of drift becomes unipolar. In this case, the radio-frequency time-of-flight mass analyser used can be a monopolar electronic system. The working region of the analyser, stretched along the axis of drift, is formed by a corner grounded electrode and a potential electrode consisting of two parts - one with a hyperbolic profile and the other in form of a flat discrete surface. High-frequency power of the analyser is single-phase. Input and output of ions takes place through a slit and a hole in the plane y=0 in the corner electrode, spatial separation of which is provided by entry angles of charged particles in the OYZ plane in the order of 1°-3°. The method simplifies the design and reduces the size of radio-frequency time-of-flight mass analysers, improves their high-frequency power system and can be used to design time-of-flight mass spectrometers with good analytical and consumer properties. |
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Method of igniting corona discharge in ion source of ion mobility spectrometer Method is based on use of a pulsed source of corona discharge, having not less one pair of ignitor electrodes, a high-voltage pulsed generator for igniting corona discharge and a pulsed electric field generator in the ionisation region. Before at least on voltage pulse generated at the ignitor electrodes in the basic ionisation phase, at least one additional voltage pulse is generated at the ignitor electrodes, during which electric field intensity in the ionisation region has a value which is lower than the normal level or equal to zero, and at the moment of transmitting to ignitor electrodes one or a series of voltage pulses of the basic ionisation phase, electric field strength in the ionisation region is set at nominal level, thus modulating the field during ignition. |
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Invention relates to devices and methods with increased sensitivity in carrying out diagnostics, for instance, optic biopsy. Method of determining area of interest includes providing one or more ionic probes suitable for demonstration of avalanche effect with shift of emitted irradiation to higher frequency, impact on ionic probe(s) by activation energy and determination of one or more areas with higher concentration of ionic probe(s) on the basis of emission, connected, at least, partially with avalanche effect. System ensures determination of area of interest in accordance with the method. |
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Disclosed composition contains a mixture of isopropyl alcohol as the base and (0.25-2.00)% aqueous solution of b-diethylaminoethyl ether of paraaminobenzoic acid hydrochloride as an aromatic additive with the following ratio of components of the mixture, vol. %: aromatic additive 0.001-0.003 and the base - the rest. The disclosed method involves preparation of a test sample, putting said sample into the spectrometer under test, obtaining an ion mobility spectrum and making a decision on identification of the test sample based on results of comparing the obtained ion mobility spectrum with a reference spectrum. The described composition is used when preparing the test sample. |
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Method of analysing charged particles based on mass and device for realising said method In a Wien filter, capacitor plates which create an electric field are not flat but cylindrical, which enables to focus charged particles in the region of the output diaphragm of a "Wien sector filter", and the input diaphragm of the Wien sector filter is placed at the focal point of a Hughes-Rozhansky energy analyser, having radius of the optical axis equal to the radius of the optical axis of the Wien sector filter, and placed in front of the Wien sector filter. |
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Device for directing ion beam, having electrodes on parallel plates Device for directing an ion beam along an essentially continuous beam line in at least one field which creates a force acting on the ions in the said ion beam, has at least one section having an essentially flat plate-like multi-terminal network having a top flat plate and bottom flat plate. Said force is essentially symmetrical in the parallel direction or essentially asymmetrical in the perpendicular direction relative the centre plane in which the beam line lies. Each of the said plates has first electrode terminals across which corresponding potential values are applied and which generate at least part of the said at least one field. The boundary of the end field lies on each end of the said at least one section and said first electrode terminals are essentially thin and flat. |
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Ion mobility spectrometer has a flow-type ion-drift chamber, a repelling electrode and a collector, an ionisation source and an aperture grid, dynodes, a first gas volume, a second gas volume, a pump and a switching valve. The spectrometer also includes a first atomising jet and a second atomising jet, a third atomising jet and a fourth atomising jet. The first gas volume consists of a first filter for cleaning gas connected to a first receiver, and the second gas volume consists of a second filter for cleaning gas connected to a second receiver. The spectrometer can have a third filter connected to the switching valve and linked to the atmosphere. |
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Focusing system is designed for precision focusing of streams of charged particles (electrons, ions) with high intensity using linearly extended sources. Said task is solved by that, the focusing system has a vacuum chamber, a system of electrical circular loops of permanent magnets and a source of charged particles. The source of charged particles is linear and the system of electrical circular loops or permanent magnets is configured to create a magnetic field of the type: Bz (ρ, 0)=B0p-α, where α=0.75-0.85; - horizontal position of the linear source; or Bz (ρ, 0)-B0p-α, where α=0.15-0.25; - vertical position of the linear source. |
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Electrostatic energy analyser of charged particles Invention refers to energy analysis of flows of charged particles charged with X-ray radiation from solid body surface and can be used for improvement of analytical, operating and consumer properties of electronic spectrometres used for investigation of objects of micro- and nanoelectronics by methods of X-ray-and-electronic spectroscopy. Method is implemented by using three-stage electrostatic energy analyser of charged particles, which provides for angular focusing of the second order of "axis-ring" type and range of entrance angles, within which photoelectrons 60°±2° are analysed, which allows coaxially building of X-ray source into analyser; at that, almost at minimum possible distance from sample. |
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Method and device to produce positive- and/or negative-ionisation gases for gas analysis In compliance with this invention, positive and/or negative gas ions are generated by plasma 6 produced by dielectrically limited discharge. Note here that said discharge is brought about by feeding inert gas through capillary 2 from dielectric material. Note also that two electrically isolated electrodes 3, 4 arranged on capillary and adjoining emission zone of said capillary are used to feed variable voltage and analysed gas is fed into zone of emission outside said capillary. |
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Method of generating two-dimensional linear electric field and device for realising said method Invention relates to mass-spectrometry based on movement of charged particles in two-dimensional linear high-frequency electric fields, and can be used to improve design of mass analysers and improve analytical and commercial characteristics thereof. The device for generating such fields has flat electrodes with potential distribution which is discrete and linear on one coordinate. In order to improve the design and system for high-frequency powering analysers, electric fields which are linear on two coordinates are generated using two discrete electrodes made from thin metal filaments with opposite potential and three continuous earthed electrodes. The required field in the working area of the analyser is generated through non-uniform distribution of coordinates of the filaments in planes of the discrete electrodes, where charges on the electrodes along one of the axis are distributed according to a discrete linear law. |
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Invention is based on separation of ions in a linear radio-frequency trap in a gas stream near the axis of said trap based on differences in mass, charge and mobility of ions when said ions are exposed to alternating and constant electric fields, created inside the trap, including charges of ions with relatively small m/z, focused around the axis of the trap, wherein ions can further be separated based on degree of resistance to collision-induced dissociation. The disclosed method involves detection of directed signals from rotating or oscillating ions derived from the gas stream by volume charge relative small ions or a non-resonance rotating field and also under the effect of fields, close on resonant on frequency, which excite harmonic motion of ions with selected m/z values. Recording of mass-spectra of product ions during collision-induced dissociation can also be carried out using a mass analyser interfaced with the trap, particularly time-of-flight mass analyser with an orthogonal ion input. |
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Method to detect and identify chemical compounds and device for its realisation Device to detect and identify chemical compounds includes chamber of analysed chemical compound entry, chamber of ions analyser, analyser of ions connected to device of data processing. Also device comprises membrane permeable for analysed compounds and arranged between specified chambers, system for supply of sample comprising analysed compound, source of ionisation. Besides, device includes facilities of connection to systems of provision of working atmospheres of chambers, sources of supply and sources of electric working fields. Besides, membrane is arranged with possibility to form ions of analysed chemical compounds on its surface as it is exposed to electromagnet radiation or flow of particles, and source of ionisation is set with the possibility to send electromagnet radiation or flow of particles directly at surface of membrane. At the same time source of ionisation is arranged in the form of source of electromagnet radiation optically joined via scanning device with surface of membrane. |
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Method and filter to entrap contaminating effluents Invention relates to filtration of fluids and can be used for separating components of said fluids. Proposed method consists in applying homogeneous magnetic or electric field to produce Stark effect and, then, applying electric field oscillating in resonance with separation of energy levels caused by said Stark effect, or applying magnetic field oscillating in resonance with separation of energy levels caused by Zeeman effect. Molecules involved in resonance are caught on filter and, then removed by suction system. |
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Barrier discharge-based ionisation source Proposed ionisation source consists of ionisation chamber comprising inducing electrode secured to dielectric plate surface and corona-forming electrode arranged opposite said inducing electrode, and high-voltage pulse source. Note here that corona-forming electrode is separated fro dielectric plate surface by 10-100 mcm-gas gap. Note also that purified gas feed system is connected to ionisation chamber to control rate of gas volume flow. |
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Method involves separation of ions in a linear radio-frequency trap with a gas stream along the axis of this trap based on differences in resistance of ions to collision-induced dissociation. The important feature is detection of induced signals from rotating or oscillating ions under the effect of a non-resonance rotating field which brings the analysed ions out of the gas stream, as well as under the effect of fields which are close to resonant fields on frequency, which excite harmonic motion of ions with selected m/z values. The mass spectrum of product ions during collision-induced dissociation can be recorded using a mass analyser which is interfaced with the trap, particularly a time-of-flight mass analyser with orthogonal ion input. |
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Method of analysing ions from specific charge in quadrupole time-of-flight mass spectrometres (monopole, tripole and mass filter) involves input of analysed ions through an input channel into a mass spectrometre analyser, selective exposure of said ions to a high-frequency quadrupole field, thereby sorting the ions according to specific charge and output of the sorted ions through an output channel to a measurement device. The ions are sorted according to charge through selective phase and selective double spatial focusing of selected ions at the input of the output channel. |
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Drift tube structure for ion mobility spectrometre Ion mobility spectrometre has a bearing flat insulating substrate, a set of electrodes mounted on the substrate for generating an electric field, lying perpendicular to the substrate, a corona discharge based ion source, a collector and a sealed casing around the electrodes. One side of the sealed casing is a flat insulating substrate on which there are heating elements and temperature control sensors. |
Another patent 2513546.