161results about "Spectrometer detectors" patented technology

A power supply device applies a voltage to a quadrupole mass filter. The power supply device has a main substrate and a wave-detection substrate. The main substrate includes a detector. The wave-detection substrate includes a wave detector and an identifier. The wave detector detects an AC component of a voltage to be applied to the quadrupole mass filter as a wave-detection voltage. The identifier outputs identification information of the wave detector defined in correspondence with the configuration of a rectifying device of the wave detector. The detector detects identification information output by the identifier, and supplies the detected identification information to a corrector that corrects a deviation of voltage caused by a leakage current of the rectifying device.

The invention relates to the field of mass spectrum equipment, in particular to a low-noise and high-sensitivity mass spectrometer Faraday cup. The Faraday cup comprises a rectangular housing, one side of which is open; the suppression grid is arranged in the shell and is close to the opening; the collector is arranged in the shell and is adjacent to the suppression grid; a slit baffle is arranged at the opening of the shell; the collector is fixed through the insulating lining, insulated from the shell, and used for receiving the ion beam and generating current; the suppression grid electrode is fixed through an insulating lining and a metal positioning block, and negative bias voltage is applied to suppress escape of secondary electrons; the top cover is assembled on the shell to form a sealed whole; the collector connecting piece is arranged on the lower portion of the collector, one end of the Faraday cup outgoing line is welded to the collector connecting piece, and the other end of the Faraday cup outgoing line is led out of the shell. Noise is remarkably reduced, and the detection sensitivity of a mass spectrometer is improved.

Methods and systems for identifying or classifying charge states of detected ions. An example method for classifying a charge state of detected ions may include generating a pulse for each ion in a plurality of ions detected by a detector, wherein each pulse has a pulse characteristic; generating a pulse-characteristic distribution of the generated pulses; and based on the pulse-characteristic distribution, generating an identification of the charge state of one or more ions in the plurality of ions.

In a mass spectrometer (10) for gas analysis, comprising: a mass spectrometer housing (12) evacuated by a vacuum pump; an ion source (16) for ionizing gas atoms or molecules entering the mass spectrometer enclosure (12) and accelerating ions in the mass spectrometer enclosure (12); an ion trap (22) made of an electrically conductive material for collecting ions generated by the ion source (16); an electrical measurement device (24) for measuring the potential or current of the ion trap (22) and connected to the ion trap (22) for inferring the ions collected by the ion trap (22) from the measured potential or current; a magnetic or electromagnetic deflection device configured to deflect or map ions having a specific mass-to-charge ratio to the ion trap (22); an electron barrier (30) made of an electrically conductive material is provided at the ion trap (22), the electron barrier having a lower potential than the ion trap (22) and being configured to generate a reverse electric field to return electrons released from the ion trap (22) onto the ion trap (22).

The invention discloses a current measuring circuit based on a quadrupole mass spectrometer, and the circuit comprises an input module which is used for receiving a current signal from the quadrupole mass spectrometer; the current detection module is used for carrying out current measurement on the current signal; wherein the current measurement module comprises a positive current measurement unit and a negative current measurement unit, the positive current measurement unit is used for measuring the positive current of the quadrupole mass spectrometer, and the negative current measurement unit is used for measuring the negative current of the quadrupole mass spectrometer; according to the current measurement circuit, small current linear amplification and large current logarithmic amplification are realized through the current measurement module, so that a high-range measurement effect is achieved, fA level-uA level current measurement can be realized, and meanwhile, automatic range switching is realized through circuit characteristics; and the cost is about one fiftieth of that of a reed switch range switching scheme.

Provided are a scintillator and the like capable of improving emission intensity. A scintillator (S) comprises a sapphire substrate (6), a GaN layer (4) that is provided on the incident side to the sapphire substrate (6) and includes GaN, a quantum well structure (3) provided on the incident side to the GaN layer (4), and a conductive layer (2) provided on the incident side to the quantum well structure (3), wherein a plurality of emitting layers (21) including InGaN and a plurality of barrier layers (22) including GaN are alternatively stacked in the quantum well structure (3), and an oxygen-containing layer (23) including oxygen is provided between the quantum well structure (3) and the conductive layer (2).

An ion guide or ion trap that comprises a plurality of electrodes (102) is disclosed. The ion guide or ion trap includes a detector (205) that can detect light or particles (114) emitted from the ion guide or ion trap due to electrical breakdown, and a control circuit (111) that can control the ion guide or ion trap in response to the detector (205) detecting light or particles (114) emitted from the ion guide or ion trap.

Embodiments provide for an ion mass spectrometer. An example ion mass spectrometer includes a laminated collimator, a laminated electrostatic analyzer (ESA) positioned downstream from the laminated collimator, a magnetic sensor analyzer positioned downstream from the laminated ESA, and a position sensitive cross-delay anode (XDL) assembly having a micro-channel plate (MCP) and a cross delay-line (XDL) anode.

A high mass ion detector for a mass spectrometer, a mass spectrometer, and a method for detecting high mass ions are provided.

A detection apparatus and method for detecting charged particles. The device relies on a detection assembly comprising microchannel plates. The useful surface of the microchannel plate device is maximized in time through the use of beam deflection means upstream of the detection front.

A charge detection mass spectrometer (CDMS) comprises an electrostatic sector field ion trap 40, an inductive image charge detector 400 and a fragmentation device. The electrostatic sector field ion t

Embodiments described herein relate to evaluating similarities between spectral data sets. One system may include a memory storing a computer-executable component, which may include an identification component identifying a first set of spectral decomposition product data of a first compound, and a processor executing the computer-executable component, the first set corresponds to a first ion activation energy comprising a target ion activation energy missed from a previous spectral measurement of a first compound; wherein the identification component further identifies a second set of spectral decomposition product data of a second compound, the second set corresponding to a second ion activation energy; and a comparison component that performs a comparison of the first set of spectral decomposition product data at the target ion activation energy and the second set of spectral decomposition product data, thereby generating a target similarity value that defines a similarity between the first set of spectral decomposition product data at the target ion activation energy and the second set of spectral decomposition product data.

A method of checking calibration of a dual-mode secondary electron multiplier (SEM) detector of a mass spectrometer using non-analyte ions, the method comprising: recording, using a counting mode dete

A process for charge detection mass spectrometry includes: acquiring a time-varying signal representative of a current induced on a detector by oscillatory motion of ions within a trapping region; processing the time-varying signal to derive a frequency of the oscillating motion; generating resonant ion selective time overview (STORI) data representing a relationship of STORIreal value to time and a relationship of STORIimag value to time based on the amplitude of the time-varying signal and the derived frequency of the oscillatory motion; regenerating STORI data based on a change in the frequency of the oscillatory motion over time; and determining a state of charge of the ion based on the regenerated STORI data.

To provide a leak detector and an ion source for a leak detector that improve the insulation durability between electrodes without changing the size and weight of the ion source. A leak detector that guides a gas from an object to be inspected to an analysis tube that is evacuated, ionizes the gas using an ion source provided in the analysis tube, and detects the ionized gas to thereby perform a leak inspection on the object to be inspected, wherein the ion source includes a filament that emits hot electrons that ionize the gas, an electrode that is electrically connected to the filament, a base member through which the electrode passes and that separates an internal space in which the filament is disposed from the outside, a first insulation member that is provided in a through-hole for the electrode formed in the base member and that insulates the electrode from the base member, and a second insulation member that is provided around the electrode and that extends toward the internal space side more than a surface of the base member that faces the internal space.

A system and method for detecting high-energy particles, the system comprising a detector unit and an AC coupler, the detector unit having a differentially biased detector having a first terminal for coupling to a positive bias voltage and a second terminal for coupling to a negative bias voltage, and the AC coupler having capacitively coupled input and output positive and negative terminals. The capacitive coupling is embedded in a transmission line structure, with the input positive terminal coupled to the first terminal of the detector and the input negative terminal coupled to the second terminal of the detector. Some advantages include reducing or eliminating resonance between the storage capacitor inductance and the detector capacitor, ringing due to common-mode excitation from the coaxial cable and the AC coupler circuitry, and undershoot and ringing due to reflections of low-frequency components blocked by the remotely mounted AC coupler.

A method of operating an instrument which comprises a first and second ion stores, comprising determining whether a target accumulation time for the second ion store is greater than a threshold accumulation time. When the target accumulation time is less than the threshold accumulation time, ions are accumulated within the second ion store using an accumulation time that is based on the target accumulation time. When the target accumulation time is greater than the threshold accumulation time, ions are accumulated within the first ion store using a first accumulation time, the ions accumulated in the first ion store are passed to the second ion store, and further ions are accumulated within the second ion store using a second accumulation time.

The performance of a power supply module is to be improved. The occurrence of discharge in the power supply module is to be prevented, and the size of the power supply module is to be reduced. In a power supply module, substrates are provided being stacked in a planar view. A low voltage circuit and a high voltage circuit are formed on a first substrate such that a distance is kept for preventing surface discharge, and a low voltage circuit is formed on a second substrate. A distance between a component of a high voltage alternating current circuit on the high voltage circuit and a component of the low voltage circuit is three times a shortest distance, at which space discharge does not occurs, between a component that constitutes a high voltage direct current circuit on the high voltage circuit and a component that constitutes the low voltage circuit.

The mass spectrometry method consists of the following steps: identifying charge state distribution (CSD) groups within the deconvoluted mass spectrometry data, each CSD consisting of at least one common mass spectral peak value assigned to each distinct charge state within each CSD in each group; assigning a weighting factor to each CSD within each group; calculating a score-weighted average molecular weight for each compound CSD within each group using the weighting factor; identifying a single target CSD within each group that corresponds to the molecular weight closest to the calculated average; summing the intensities of each common assigned mass spectral peak across the entire group for each identified common peak in each group; assigning the summed intensity to a single target CSD for that group; discarding all CSDs other than the target CSD; and using the summed intensity to calculate the abundance of each component compound.

In a TOFMS measurement unit, an ion acceleration section accelerates ions to send them into a flight space, within which a flight-field creation section creates, an electric field for causing ions to fly. A controller unit operates the measurement unit so as to repeat a measurement for a predetermined sample while varying a voltage applied to an electrode in the measurement unit, and calculates mass-resolving power based on each measurement result. An approximate function calculator unit finds an approximate function representing a relationship between the voltage and the mass-resolving power, based on data of combinations of the voltage and the mass-resolving power obtained under the control of the controller unit. A voltage determiner unit determines a voltage value corresponding to a target value of the mass-resolving power by the approximate function, and determines the voltage value as a voltage to be applied to the electrode in the TOFMS concerned.

A method for controlling an ion detector is provided. The method includes converting a received ion into emitted electrons, multiplying the emitted electrons, detecting the multiplied electrons, generating a detection signal in response, and determining the ion intensity from the detection signal.

To reduce variation of a measurement result by aligning a mass resolution of a plurality of devices.SOLUTION: In an embodiment of a TOFMS according to the present invention, the TOFMS includes a measurement part (1) containing: each flight magnetic field formation part that forms a magnetic field for flying an ion into a flight space (153, 154, and 155); and each ion acceleration part (151 and 152) that accelerates the ion as a measurement object and feeds it into the flight space. The TOFMS comprises: a control part (3) that repeatedly executes a measurement to a predetermined sample while changing a voltage applied to an electrode contained in the measurement part, and operates the measurement part so as to calculates a mass resolution on the basis of the measurement result in each measurement; an approximate calculation part (3) that calculates an approximate for approximating a relation of them on the basis of data of a plurality of pairs of an application voltage to the electrode and a resolution corresponded to them, obtained under a control by the control part; and a voltage determination part (3) that calculates a voltage value corresponded to a target value of the mass resolution by using the approximate, and determines the voltage value as an application voltage to the electrode in the device.SELECTED DRAWING: Figure 1

A charge-detection mass spectrometry process includes capturing a time-varying signal, representing a current induced by the oscillatory motion of an ion within a capture region at a detector; processing the time-varying signal to derive a frequency of the oscillatory motion; and generating, based on the amplitude of the time-varying signal and the derived frequency of the oscillatory motion, Selective Temporal Overview of Resonant Ion (STORI) data. Real -Values ​​over time and HISTORY Imag -Represent values ​​over time; regenerate the STORI data based on a variation of the frequency of the oscillation over time and determine a charge state of the ion based on the regenerated STORI data.

An aspect of the disclosure provides a method of reducing electrical measurement noise in a detection apparatus configured to detect the arrival of ions at a collector electrode, wherein the detection apparatus comprises an air mover to provide a flow of air in the apparatus, the method comprising: operating the air mover, at an operating level, to provide the flow of air; reducing operation of the air mover for a quiet period; and operating the detection apparatus to allow ions to travel to be detected by a collector electrode during the quiet period.

An ion detection current conversion circuit includes: a conversion amplifier coupled to a conversion resistor assembly to convert an ion detection current generated by an ion detector into an ion detection voltage, the conversion resistor assembly including a resistor with high resistance and a capacitor compensation element; and a compensation voltage circuit for obtaining a compensation voltage from the ion detection voltage and feeding the compensation voltage to the capacitor compensation element, the compensation voltage circuit including a variable resistor for adjusting the compensation voltage. The conversion circuit may further include: a voltage reduction circuit for obtaining a reduced voltage from the ion detection voltage; and a neutralization amplifier unit for at least partially neutralizing the voltage reduction of the voltage reduction circuit. The reduced voltage allows the use of low-voltage components, such as digital variable resistors.

The disclosure provides multimode configurable spectrometers, a method of operating a multimode configurable spectrometer, and an optical monitoring system. In one embodiment the multimode configurable spectrometer includes: (1) an optical sensor configured to receive an optical input and convert the optical input to electrical signals, wherein the optical sensor includes multiple active pixel regions for converting the optical input to the electrical signals, (2) conversion circuitry, having multiple selectable converting circuits, that is configured to receive and convert the electrical signals to a digital output according to a selected one of the selectable converting circuits, and (3) a sensor controller configured to set a synchronized operating mode to direct operation of the optical sensor and select, based on the synchronized operating mode, at least one of the selectable converting circuits to provide the digital output.

To provide a multi-reflection time-of-flight mass spectrometer.SOLUTION: Correction electrodes extend along the Y direction in or near a space between mirrors. Each correction electrode has a surface parallel to the Y-Z plane shaped such that its separation from one of the mirrors varies along the Y direction. The correction electrodes are biased to produce a combined voltage offset which varies as a function of distance along the Y direction. A first component corrects an intended aberration arising from a mirror tilt, and a second component corrects unintended aberrations arising from perturbations to the ideal time of flight extending from maximum to minimum perturbations. The shapes of the correction electrodes are such that some or all of the correction electrodes may be energized to generate a range of combined voltage offsets that compensate for a range of time-of-flight aberrations corresponding to the intended and unintended aberrations.SELECTED DRAWING: Figure 4

An ion detection current conversion circuit (153) comprises: - a conversion amplifier (152) coupled with a conversion resistor assembly for converting an ion detection current produced by an ion detector into an ion detection voltage, the conversion resistor assembly comprising a resistor (151) having a high resistance and a capacitive compensation element (157), and - a compensation voltage circuit (158) for deriving a compensation voltage (Vcomp) from the ion detection voltage (Vout) and feeding the compensation voltage to the capacitive compensation element (157), the compensation voltage circuit comprising a variable resistor (201) for adjusting the compensation voltage. The conversion circuit may further comprise a voltage reduction circuit (R15, R16, 220) for deriving a reduced voltage (Vred) from the ion detection voltage (Vout) and a neutralizing amplifier unit (211) for at least partially neutralizing the voltage reduction of the voltage reduction circuit. The reduced voltage allows low-voltage components, such as digital variable resistors, to be used.

A high voltage power supply system for a mass spectrometer includes a ground referenced power supply having a first transformer with a primary winding and a secondary winding, the primary winding electrically coupled to a first AC power source, and a floating bias power supply having a second transformer with a primary winding and a secondary winding, the primary winding of the second transformer electrically coupled to a second AC power source. A return electrical path of the floating bias power supply is electrically coupled to the ground referenced power supply to bias an output voltage of the ground referenced power supply. A floating shield is disposed about the floating bias power supply and at least one resistive element is located in the return electrical path of the floating bias power supply to reduce noise coupled from the floating bias power supply to the ground referenced power supply.

The application provides a mass spectrometry imaging device and method. The device comprises an adjustment channel for adjusting the flight direction and vertical direction offset of the ion beam emitted by the emission unit, so that the ion beam flies through the ion lens focusing beam spot shape at different angles, and is bombarded to the target area of the sample target along the optical axis; a plurality of deflection plate groups are arranged in the adjustment channel, each deflection plate group comprises four deflection plates of the same size and arranged oppositely, and the plurality of deflection plate groups are arranged horizontally; each deflection plate group is connected with an adjustable voltage signal, the amplitude of the adjustable voltage signal is associated with the target flight direction of the ion beam, the size of the deflection plate and the arrangement position of each deflection plate group in the adjustment channel through which the ion beam passes; and a detection unit is arranged for receiving the secondary ions generated after the ion beam bombarded to the surface of the sample target in the adjustment channel. The mass spectrometry imaging device and method are used for accurately positioning the sampling point of the secondary ion mass spectrometry.