21results about "Spectrometer detectors" patented technology

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.

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.

A charge detection mass spectrometer (CDMS) includes an electrostatic linear ion trap (ELIT), a processor, and a memory storing instructions executable by the processor to (a) control the ELIT to trap ions, (b) collect ion measurement information as the trapped ions oscillate back and forth through the ELIT, the ion measurement information including the charge induced by the ions on the charge detector of the ELIT during each passage of the ions through the ELIT and the timing of the induced charges relative to each other, (c) process the ion measurement information in the time domain of each of a plurality of sequential time windows to determine the charge magnitude of the ions during each time window, and (d) determine the charge magnitude of the trapped ions based on the charge magnitude value of each time window.

A method of mass spectrometry, comprising: providing a mass spectrometer having an ion detector; allocating a first time period for mass analysing ions in a manner such that only ions having a first restricted range of mass to charge ratios are able to reach the ion detector; allocating a second, subsequent time period for mass analysing ions in a manner such that only ions having a second, different restricted range of mass to charge ratios are able to reach the ion detector; controlling the mass spectrometer, when the first time period begins, to only transmit ions having said first range of mass to charge ratios to the ion detector; and accumulating the ion signal generated by the ion detector during the first time period so as to determine if the accumulated ion signal rises above a pre-defined value; wherein, if the accumulated ion signal rises above the pre-defined value during the first time period, the mass spectrometer responds by attenuating ions for the remainder of the first time period so as to reduce or stop ions being received at the ion detector during the remainder of the first time period.

The present invention provides a system and a method for performing evolved gas analysis and gas chromatography on a single sample within a single experiment. The system and the method enable the simultaneous acquisition of thermal and compositional data by splitting evolved gases from a micro-furnace into two analytical pathways. A first pathway is directed to an evolved gas analysis (EGA) tube, and a second pathway is directed to a gas chromatography (GC) column following temporary cryogenic trapping. After completion of the EGA stage, the trapped gases are released and transferred into the GC column via an internal cryo-trap, and a GC-MS analysis is performed on the same sample. Upstream and downstream splitter connections and multiple transfer lines route gases efficiently without requiring additional sample preparation.

The present invention relates to the field of transient dynamics and catalytic surface and interface research, and provides a pump-probe TAP instrument. The pump-probe TAP instrument provided in the present invention comprises a sample injection pulse system, a micro-reactor, a liquid nitrogen cooling system, a mass spectrometry system, and a vacuum system; the vacuum system comprises a first vacuum cavity, a second vacuum cavity and a vacuum pump group which are connected in sequence, and the side wall of the first vacuum cavity is provided with a vacuum gauge having a working end extending into an inner cavity of the first vacuum cavity; the liquid nitrogen cooling system comprises an annular liquid nitrogen cavity provided in the first vacuum cavity; the sample injection pulse system comprises a pulse flange provided on the top of the first vacuum cavity, a first pulse valve and a second pulse valve are provided in the pulse flange, and an included angle α is formed between the first pulse valve and the second pulse valve; the pulse flange is also provided with a condensed water piping channel for accommodating condensed water piping; the micro-reactor is provided at the bottom of the pulse flange, the pulse flange is further provided with a pulse channel, the first pulse valve and the second pulse valve are connected to the top of the micro-reactor by means of the pulse channel, and the micro-reactor is suitable for loading a sample; the mass spectrometry system comprises a mass spectrometer, the mass spectrometer is provided on the side wall of the first vacuum cavity, and a mass spectrometer filament of the mass spectrometer extends to the center of the first vacuum cavity; and the bottom of the micro-reactor is further provided with an extension tube extending towards the mass spectrometer filament and located above the mass spectrometer filament. By means of the arrangement, the present invention can realize experiments involving continuous pulses, intermitt

A charge detection mass spectrometer (CDMS) is described, comprising an electrostatic sector field ion trap (40) and an induced charge detector (400), the electrostatic sector field ion trap (40) configured to at least partially define an ion path through the induced charge detector (400). A method is also described.

Method for determining a measure of the decay rate of an ion sample subjected to mass analysis in a mass analyzer with mirror current detection, the method comprising: Receiving a detection signal for the ion sample from a detection of transients of the ion sample obtained using the mass analyzer, wherein the detection signal for the ion sample has a temporal decay rate; and Determining the measure for the decay rate of the ion sample based on an extrapolated resolution for the ion sample, where the extrapolated resolution is an expected resolution of the detection signal under conditions where the temporal decay rate of the detection signal for the ion sample is dominated by collision effects, where the extrapolated resolution for the ion sample is an expected resolution of the detection signal under conditions where the resolution of the detection signal is stable with respect to increasing the number of sample ions in the sample ion cloud used to generate the detection signal for the ion sample, wherein the extrapolated resolution for the ion sample is determined from an extrapolated function that provides an expected resolution of the detection signal under conditions dominated by collision effects, wherein the extrapolated function is determined based on several measures of resolution and several measures of signal intensity that were not obtained under conditions dominated by collision effects.

The application discloses a novel ion trap for mass spectrometry and a mass spectrometer, and the novel ion trap is a core component of the mass spectrometer and is used for ionizing, capturing, storing, fragmenting and separating ions. The application is characterized in that two or more electrically unconnected half electrodes are arranged at the inlet of the ion trap body, and an opening for passing gas molecules is arranged between the half electrodes. The half electrodes are further connected with voltage adjusting devices capable of changing voltage. The voltage adjusting devices can adjust the voltage on the half electrodes to form an electric field to ionize the gas molecules passing through the opening. The voltage on the half electrodes can be changed by the voltage adjusting devices to switch the novel ion trap to work in an ionization mode or a mass analysis mode. Compared with the prior art, the application combines the ion trap and the ionization source into an integrated ion trap, simplifies the internal structure of the mass spectrometer, facilitates integrated design, integrated processing, and installation and maintenance, reduces the weight of the mass spectrometer itself, and increases the possibility of the design direction of a small instrument.

A Fourier Transform electrostatic linear ion trap (ELIT) is disclosed with an electron multiplier detector comprising one of a microchannel plate and a channel electron multiplier. An (ELIT) is provided comprising a central axis along which ions travel; an image current detector disposed at least partially around the central axis of the ELIT; and an electron multiplier detector arranged in an opening of the image current detector, the electron multiplier detector being operable to receive ions deflected from the central axis. The electron multiplier detector may have a front surface that is perpendicular to the central axis of the ELIT. The electron multiplier detector may comprise two separate elements at non-normal angles to the central axis of the ELIT. The image current detector may comprise a cylinder with the opening on one side in which the electron multiplier detector is arranged, a U-shape, or a half-tube detector.

To process data determined from image charge / current signals representing multiple ions of a given charge state (Q), each undergoing vibrational motion at respective oscillation frequencies (f) within an ion analysis apparatus.SOLUTION: A data set includes a measured signal frequency (f0) common to a plurality of measured image charge / current signals, and a plurality of estimated ion charge values corresponding to the respective amplitudes of the measured image charge / current signals. Using an integer charge value ([Qi]) corresponding to one of the estimated ion charge values rounded to the nearest integer, a plurality of different image charge / current signal frequency candidate values (fiCand) is calculated. The plurality of calculated image charge / current signal frequency candidate values (fiCand) is compared with the plurality of different signal frequencies (f) of the measured image charge / current signals to measure a score value representing the similarity between them on the basis of the comparison.SELECTED DRAWING: Figure 2b

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

Evaluate the similarity between spectral datasets. [Solution] The system comprises a memory for storing computer executable components and a processor for executing them, which includes an identification component for identifying a set of first spectral decomposition data for a first compound, an identification component corresponding to a first ion activation energy including a target ion activation energy omitted from conventional spectroscopic measurements of the first compound, an identification component for further identifying a set of second spectral decomposition data for a second compound, and a comparison component that performs a comparison between the set of first spectral decomposition data and the set of second spectral decomposition data at the target ion activation energy, and as a result obtains a target similarity value that defines the similarity between the set of first spectral decomposition data and the set of second spectral decomposition data at the target ion activation energy.

Method for operating an analytical instrument comprising a first ion storage and a second ion storage downstream of the first ion storage, wherein the method comprises: Determine whether a target accumulation time for the second ion storage is greater than a threshold accumulation time; If it is determined that the target accumulation time is less than the threshold accumulation time: accumulation of ions within the second ion storage using an accumulation time based on the target accumulation time; and If it is determined that the target accumulation time is greater than the threshold accumulation time: Accumulate ions within the first ion storage using a first accumulation time based on a difference between the target accumulation time and the threshold accumulation time, transfer the ions accumulated in the first ion storage to the second ion storage, and accumulate further ions within the second ion storage using a second accumulation time based on the threshold accumulation time.

A method for determining a measure of a decay rate of an ion sample undergoing mass analysis in a mass analyzer using image current detection, the method comprising: receiving a detection signal of the ion sample from a transient detection of the ion sample obtained using the mass analyzer, the detection signal of the ion sample having a decay rate over time; and determining the measure of the decay rate of the ion sample based on an extrapolated resolution of the ion sample, the extrapolated resolution being an expected resolution of the detection signal under a condition that the decay rate over time of the detection signal of the ion sample is dominated by collision effects.

A device and method for recording spectral information of charged particle beams, such as ion beams, or of light beams, at a high resolution. Specifically, a mass spectrometer having a focal plane detector. The device and method enable the recording of mass spectral data at both high mass resolving power and mass accuracy, during parallel acquisition of potentially the entire spectrum of a sample beam.

This disclosure primarily provides a method and system comprising the following steps: directing an ion beam to a region of a sample to release charged particles from the region of the sample, wherein the directed ion beam is pulsed at a first repetition rate; deflecting a first subset of the released charged particles from a first path to a second path different from the first path in response to a gate signal synchronized with the repetition rate of the pulsed ion beam; and detecting the first subset of the released charged particles in a time-of-flight (TOF) mass spectrometer to determine information about the sample, wherein the gate signal is a common reference time set for the TOF mass spectrometer for the first subset of charged particles released by each pulse of the ion beam.