136 results about "Quadrupole" patented technology

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.

The utility model is applied to the technical field of mass spectrometry, and particularly relates to an ion deflection device which comprises a shell, a U-shaped channel is arranged in the shell, and openings communicated with the U-shaped channel are arranged at two ends of the shell; the first quadrupole rod is arranged in the U-shaped channel in a U shape, the two ends of the first quadrupole rod correspond to the openings in the two ends of the shell respectively, and the first quadrupole rod is connected with a first electrifying bolt; and the second quadrupole rod is arranged at the openings in the two ends of the shell, the ion channel of the second quadrupole rod is aligned with the ion channel of the first quadrupole rod, and the second quadrupole rod is connected with a second electrifying bolt. According to the device, the first quadrupole rod is connected with alternating current through the first electrifying bolt, the second quadrupole rod is connected with alternating current through the second electrifying bolt, and when ions enter an ion channel of the first quadrupole rod from the ions of the second quadrupole rod and finally reach a monitor, the ions are detected. And a linear cascading form is avoided, so that the overall size is smaller, and the occupied area is smaller.

The invention relates to the technical field of vacuum detection, in particular to a system for quickly judging whether a complex vacuum chamber has vacuum leakage or not. Aiming at the problem of vacuum leak detection, the invention provides the following technical scheme: the judgment system consists of a test vacuum chamber, a background vacuum chamber, a quadrupole mass spectrometer, a vacuum gauge tube and a vacuum unit; the test vacuum chamber is connected with the background vacuum chamber through a corrugated pipe; the vacuum gauge tube and the background vacuum chamber are connected through a CF35 knife edge sealing flange, and the quadrupole mass spectrometer and the background vacuum chamber are connected through a CF35 knife edge sealing flange. According to the invention, the leakage detection requirements of non-standard complex vacuum systems and various high-requirement vacuum systems in the nuclear fusion field at the present stage are met, and non-intrusive, rapid and high-reliability leakage judgment is realized through multi-interface adaptation, high-vacuum stable maintenance, dual precise monitoring and low-leakage-rate sealing design; the method is suitable for batch detection and on-line monitoring of fusion subsystems or engineering occasions with strict requirements for leak detection efficiency and accuracy.

An ion implantation system has a first linear accelerator for accelerating ions of an ion beam to a first energy along a beam path. A second linear accelerator positioned downstream of the first linear accelerator along the beam path accelerates the ions to a second energy. A charge stripper has a stripper tube with a passageway positioned between the first and second linear accelerators. A charge stripping medium is provided in the passageway to strip at least one electron from the ions as the ion beam passes through the charge stripping medium. A focusing apparatus is associated with the stripper tube to control a trajectory of the ions within the passageway of the stripper tube. The focusing apparatus can be two or more quadrupoles and include an electrostatic lens, a magnet, a solenoid, or a Einzel lens.

The invention discloses a high-throughput detection method for liquid crystal monomers in sediments, which comprises the following steps: extracting, enriching, purifying and removing impurities from the sediments, measuring by using a gas chromatograph-quadrupole rod-electrostatic field ion orbitrap combined high-resolution mass spectrometer, and analyzing to obtain the types and contents of the liquid crystal monomers in the sediments. According to the method, various liquid crystal monomers can be simultaneously and rapidly determined, impurity interference in a sample is effectively removed by utilizing extraction, enrichment and purification impurity removal, the chromatographic separation efficiency is improved, the anti-interference capability is improved by utilizing the extremely high resolution of the electrostatic field ion orbitrap high-resolution mass spectrum, the background interference is effectively reduced, and the detection accuracy is improved. Meanwhile, ultrasonic-assisted extraction and solid-phase extraction technologies are combined to purify a target object, so that the tedious steps of sample pretreatment are simplified, and the detection limit of the detection method is reduced.

1. The name of the design product: liquid chromatograph mass spectrometer (2050 triple quadrupole). 2. The use of the design product: the design is used for quantitative and semi-quantitative analysis of organic components. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model relates to the technical field of mass spectrometer maintenance equipment, and discloses quadrupole mass spectrometer maintenance auxiliary equipment, which comprises a base, two protection blocks are slidably connected in the base, a stabilizing seat is arranged on the inner walls of the two protection blocks, the top of the stabilizing seat is fixedly connected with a quadrupole body, and the quadrupole body is fixedly connected with the quadrupole body. A toothed plate is fixedly connected to the interior of the base, a driving assembly used for rotation is installed in one of the protection blocks, auxiliary plates are rotatably connected to the exteriors of the two adapter rods, a chuck is slidably connected to the interior of the supporting rod, and a limiting assembly used for limiting movement is installed in the chuck. According to the quadrupole rod, the quadrupole rod body can be limited through the protection block and the chuck, in the maintenance process, the unique structure and design of the quadrupole rod provide great convenience for maintenance personnel, the maintenance time is shortened, the working efficiency is improved, and the reliability of equipment is improved.

An abnormal site identification method according to the present disclosure is an abnormal site identification method for a triple quadrupole mass spectrometer comprising a first quadrupole and a second quadrupole on opposite sides of a collision cell. The abnormal site identification method includes: a step (S20) of acquiring comparison data; a step (S30) of acquiring reference data; a step (S50) of identifying an abnormal site in the triple quadrupole mass spectrometer on the basis of the reference data and the comparison data; and a step (S60) of reporting the abnormal site.

The invention discloses a method for detecting residual chloroacetamide in piracetam. A sample to be detected is detected by adopting gas chromatography-triple quadrupole tandem mass spectrometry (GC-MS / MS); the gas chromatography parameters are as follows: the temperature of a sample inlet is 245-255 DEG C; the heating procedure is as follows: the initial temperature is 45-55 DEG C, the temperature is raised to 275-285 DEG C at the heating rate of 35-45 DEG C / min, the post-operation temperature is 295-305 DEG C, and the post-operation time is 4.5-5.5 minutes; the mass spectrum parameters are as follows: the temperature of an ion source is 225-235 DEG C, the temperature of a quadrupole is 145-155 DEG C, and the temperature of a transmission line is 245-255 DEG C; the sampling mode is MRM, the solvent delay is 1.5-2.5 min, and the post-operation time is 2.00-5.00 min. The method disclosed by the invention is simple to operate and high in detection speed, and has the advantages of high sensitivity, high precision and high repeatability.

The invention discloses a refractive index and temperature decoupling sensing system and method based on a polarization adjustable dual-mode all-dielectric metasurface. The system comprises a light source, a polarization adjustment module, a metasurface sensing array and an optical detection and data processing module which are arranged along a light path. A square nanopore structure is uniquely and diagonally segmented, polarization rotation is utilized to respectively excite a symmetric protection continuous domain bound state mode and a magnetic quadrupole dominated fano resonance mode, a low-coupling and low-condition-number sensitivity matrix is constructed, and the problems of signal crosstalk and noise interference in multi-parameter detection are effectively solved. And in combination with a phase inquiry technology, the sensitivity is further improved, and high-precision and crosstalk-free parallel measurement of the refractive index and the temperature is realized. The system is compact in structure, high in tunability, good in anti-interference capability and suitable for trace biochemical analysis and environment monitoring.

The present invention discloses a mass spectrometry ion extraction device and method, comprising an ion source, an air curtain chamber, a sampling chamber and an ion optical component arranged in sequence for generating ions of an object to be detected; the inlet end of the air curtain chamber is composed of a conical air curtain plate with an air curtain hole, and a branch is arranged on its side wall to provide air curtain gas, and a strong focusing electrode assembly is arranged in the air curtain chamber, and a slit is formed between one end of the strong focusing electrode assembly close to the air curtain hole and the inner wall of the air curtain plate; the sampling chamber includes a sampling cone and a high-pressure ion transmission component, and a second differential hole is arranged at the outlet end of the sampling chamber. The present invention improves the extraction interface, increases the distance between the air curtain hole and the sampling cone, focuses the ions extracted through the air curtain hole by applying a spatial strong focusing electrostatic quadrupole electric field, and increases the density of the ion group, thereby improving the extraction efficiency of the sampling cone and reducing the concentration of solvent ion adducts.

The invention provides a notch signal generator, which comprises an FPGA (Field Programmable Gate Array) module for calculating corresponding resonant frequency parameters according to mass-to-charge ratios of a plurality of target mass number ions and generating amplitude and phase information required by each frequency; the plurality of DDS modules output digital waveform signals of a plurality of frequencies according to the resonant frequency parameters; the multi-frequency mixing module is used for superposing the plurality of digital waveform signals into a composite notch waveform according to a preset amplitude proportion and a phase relation; the digital-to-analog conversion module and the power amplification module are used for converting the composite notch waveform into a composite notch signal and carrying out power amplification so as to meet the amplitude requirement under a radio frequency driving condition; and the control module is used for dynamically adjusting the composite notch signal, so that different frequency components generate resonance interference on the target mass number ions in a proper time window. According to the invention, the quadrupole rod structure does not need to be changed, and frequency control can be applied to multiple target mass number ions and synchronous elimination can be realized.

The present invention relates to a tandem mass spectrometer and a collision cell and a working method thereof. The collision cell of the tandem mass spectrometer comprises: a chamber, a front-stage high-order field N-pole and a rear-stage quadrupole. After ions with a wider mass range enter the chamber through an introduction center hole of an introduction electrode, they can smoothly enter the front-stage high-order field N-pole, and the front-stage high-order field N-pole can capture ions with a wider mass range. In addition, collision gas enters the chamber corresponding to the front-stage high-order field N-pole through a vent, and the collision gas collides with the ions entering the front-stage high-order field N-pole, so that the ions are cracked to form fragments. The rear-stage quadrupole can realize that the fragmented and wider range of fragment ions are concentrated near the central axis, so that the fragment ions have a better focusing effect, and efficiently pass through the extraction center hole of the extraction electrode, that is, the ion mass range can be wider and the transmission efficiency can be higher, and the residence time of the ions in the high-pressure collision cell can be effectively reduced.

A magnetic system capable of creating electron minibeams includes a first dipole, a second dipole, a third dipole, a fourth dipole, and a quadrupole. The first dipole defines a first central aperture, the second dipole defines a second central aperture, the third dipole defines a third central aperture, the fourth dipole defines a fourth central aperture, and the quadrupole defines a quadrupole aperture. The first central aperture, the second central aperture, the third central aperture, and the fourth central aperture are coaxially aligned to define a dipole axis. The first dipole, the second dipole, the third dipole, and the fourth dipole are rotatable about the dipole axis and translatable along the dipole axis relative to each other. The quadrupole is selectively spinnable about a quadrupole axis defined by the quadrupole aperture.

The utility model discloses a quadrupole rod for a mass spectrometer, which belongs to the field of quadrupole rods and comprises an insulating fixing part, a through hole is arranged in the middle of the front surface of the insulating fixing part, concave fixing grooves are arranged at four corners of the insulating fixing part, and metal connecting sheets are fixedly mounted in rectangular grooves at the four corners of the insulating fixing part. A locking piece is fixedly installed in the middle of the upper surface of the metal connecting piece, the connecting assembly is arranged in the insulation fixing piece in a sleeved mode to be matched with the insulation fixing piece to fixedly install the four electrode rods, the gap error between every two adjacent electrode rods is controlled and kept within the range, and then assembling of the four-pole rod fixing device can be completed. According to the assembly of the quadrupole rod assembly and the insulation fixing piece and the assembly of the connecting assembly and the electrode rods, the assembly precision is high, the assembly process is simple and convenient, stray capacitance introduced by electrical connection between the electrode rods can be avoided through assembly, the qualified rate of machining production of the quadrupole rod can be improved, and then the production economic benefits of enterprises are improved.

A combined ion discharge tube and an ion guide system is disclosed. The ion discharge tube comprises of a cathode tube and an anode surface. The discharge tube acts as the cathode, whereas the anode can be any number of different configurations. In one embodiment the discharge tube is set inside a quadrupole ion guide, with the walls of the ion guide being the anode. In other embodiments, the discharge tube is placed inside the rods of the quadrupole and the inner walls of the rods or a separate plate acting as the anode. In all configurations, the ions are formed by the discharge tube and are introduced into the RF confinement of an ion guide to increase ion transfer efficiency.

A shield member for a mass sensor includes a body including an outer shield surface and an inner shield surface defining shield sides and a body portion that is positioned between the shield sides. The shield member further includes a support member configured to support at least a portion of the body and structured to enable airflow though the support member. The body of the shield member is configured to shield one or more components of a mass sensor from a magnetic field.

To improve manufacturing yield while maintaining performance such as mass resolution. [Solution] One embodiment of the method for manufacturing a quadrupole mass filter according to the present invention is a method for manufacturing a quadrupole mass filter including four rod electrodes, comprising: a first step (S1, S2) of forming a hyperbolic surface by cutting at least a part of the side surface or circumferential surface of four rod-shaped members, each having a length in the range of 80 mm to 120 mm, in the longitudinal direction; and a second step (S3) of using a holding member to position and fix the four rod-shaped members, each having a hyperbolic surface formed on it, as rod electrodes, so that the four rod electrodes surround a central axis and the hyperbolic surface of each rod electrode faces the central axis.

A borehole sonic logging tool and method for imaging. The borehole sonic logging tool may comprise a transmitter configured to transmit a sonic waveform into a formation, wherein the transmitter is a dipole, and a receiver configured to record a reflected wave as waveform data, wherein the receiver is a quadrupole. A method may comprise disposing a downhole tool into a borehole, selecting a frequency range for the transmitter to a horizontally-polarized shear formation body wave, broadcasting the sonic waveform as the horizontally-polarized shear formation body wave into the formation penetrated by the borehole with the transmitter, recording a reflected wave on the receiver as waveform data, wherein the reflected wave is the horizontally-polarized shear formation body wave reflected from a reflector, and processing the waveform data with an information handling system.

The invention discloses a magnetic quadrupole lens, an X-ray bulb tube and a method for focusing and femtofocusing an electron beam. The magnetic quadrupole lens comprises a frame iron core; the four magnetic pole assemblies are arranged on the inner periphery of the frame iron core and used for generating a focusing magnetic field for focusing the electron beams and a femtofocus magnetic field for performing femtofocus on the electron beams. The magnetic pole assembly comprises a main pole arranged on the inner periphery of the frame iron core and extending towards the center of the frame iron core; the first focusing coil sleeves the main pole and is used for generating a first focusing magnetic field for focusing the electron beam; and the first femtofocus coil sleeves the main pole and is used for generating a first femtofocus magnetic field for performing femtofocus on the electron beam. Wherein the first femtofocus coil is closer to the frame core than the first focus coil.

Systems and methods are disclosed for ion injection into an electrostatic trap. Various aspects of this disclosure provide a mass spectrometer system including a primary ion path including a plurality of quadrupoles; and a secondary ion path coupled to the primary ion path utilizing turning elements. The secondary ion path may include an electrostatic linear ion trap (ELIT), the ELIT being operable to analyze ions diverted from the primary ion path and return them to the primary ion path. The primary ion path may include a time-of-flight mass analyzer. The secondary ion path may be bi-directional. Ions may travel in a first direction when coupled into the secondary ion path using a first turning element in the primary ion path and may travel in a second direction when coupled into the secondary ion path utilizing a second turning element in the primary ion path. The secondary ion path may include a collision quadrupole.

The invention provides a double-curved-surface quadrupole rod device, a double-curved-surface quadrupole rod system and a manufacturing method of the double-curved-surface quadrupole rod device. The double-curved-surface quadrupole rod device comprises at least one pole rod and a fixing structure. The fixing structure comprises a fixing seat, a positioning ball, a spring and a fastening screw; one part of one side of the outer surface of the pole rod is a hyperboloid, one part of the other side of the outer surface of the pole rod is a round surface, a pair of parallel planes are arranged between the hyperboloid and the planes, and the four planes jointly form the outer surface of the pole rod; the fixing base is of a three-dimensional columnar structure, the center of the fixing base is hollow, the pole rod is arranged in the fixing base, and the round face of the outer surface of the pole rod is matched with the inner surface of the fixing base. Through the design of the hyperboloid pole rod, a more ideal hyperboloid electric field can be generated, the influence of a high-order field is reduced, the trajectory offset of charged particles is avoided, and the resolution and sensitivity of the mass spectrometer are improved.

The invention belongs to the technical field of mass spectrometry, and particularly relates to an on-line soil detection quadrupole mass spectrometer based on an element analysis technology and an analysis method. The sampling system comprises an automatic sampling mechanical arm moving device, a washing device, a blowing device, a sample cabin, a sealing O ring, a sample transmission mechanism, a laser and a primary reflecting plate, and the analysis system comprises a laser reflecting lens, a transmission lens, an ion source, a mass analyzer, a detector, a vacuum transfer cavity, a vacuum analysis cavity, a mechanical pump, a molecular pump and a control computer. A mass analyzer, an ion source and a transmission lens are arranged in a cavity body of the vacuum transfer cavity, the molecular pump is connected with the vacuum transfer cavity, and the vacuum transfer cavity and the analysis vacuum cavity are two-stage differential systems. Laser and ion source double ionization is adopted to improve the ion yield, interference is reduced in combination with a two-stage differential vacuum system, and the quadrupole mass spectrometer is high in vibration tolerance and suitable for field complex environments such as unmanned farms.

A charge stripper has a stripper tube 174 with a passageway, which may be positioned between the first and second linear accelerators of an ion implantation system, the first linear accelerator for accelerating ions of an ion beam to a first energy along a beam path, and the second linear accelerator positioned downstream of the first linear accelerator along the beam path accelerates the ions to a second energy. A charge stripping medium is provided in the passageway to strip at least one electron from the ions as the ion beam passes through the charge stripping medium. A focusing apparatus 200 is associated with the stripper tube to control a trajectory of the ions within the passageway of the stripper tube. The focusing apparatus can be two or more quadrupoles 202 and include an electrostatic lens, a magnet, a solenoid, or a Einzel lens.

This invention discloses a segmented quadrupole system incorporating phase control, comprising a segmented quadrupole structure, a direct digital synthesizer, a first phase shifting device, a second phase shifting device, a first radio frequency high voltage output device, and a second radio frequency high voltage output device. Compared to traditional quadrupole systems that increase radio frequency high voltage and frequency, this invention achieves high resolution while reducing electrical noise and power loss in the radio frequency system and improving power supply control accuracy, as it eliminates the need to increase high voltage and frequency. This results in higher instrument reliability while maintaining high resolution. By dividing the long quadrupole into multiple short segments—at least one first quadrupole and at least one second quadrupole—the manufacturing precision requirements for single-segment quadrupole electrodes are effectively reduced, simplifying the manufacturing process, improving overall mechanical stability, and minimizing the impact of thermal deformation and mechanical vibration on mass spectrometer performance.

To provide a device capable of reducing variations at least in a shape and a focusing angle at an intermediate image plane position of multi-electron beams.SOLUTION: A multi-electron beam irradiation device includes: a shaping aperture array substrate 203 in which a portion of each of electron beams traveling in a divergence direction passes through a plurality of first openings to form multi-electron beams traveling in the divergence direction; a multi-stage lens array 210 of three or more stages including a plurality of lens arrays of two or more stages in which each lens has a multipole of at least a quadrupole disposed on the trajectory of each beam, the multi-stage lens array deflecting the multi-electron beams traveling in a divergence direction to form substantially parallel multi-electron beams and also performing magnification correction and focal length correction in two orthogonal directions; and an angle limiting aperture array substrate 211 in which a plurality of second openings are formed and the multi-electron beams that have passed through the multi-stage lens array pass through the plurality of second openings, to thereby limit a divergence angle or a focusing angle of each electron beam.SELECTED DRAWING: Figure 1

A method for determining an operating frequency of an acoustic transmission system includes a primary element and a secondary element arranged on either side of a wall, the primary element including a first electro-acoustic transducer for generating and detecting acoustic waves, the secondary element including a second electro-acoustic transducer and being configured to controllably change an electrical impedance across the terminals of the second transducer between an open-circuit state and a short-circuit state; wherein the operating frequency is determined from the change as a function of the frequency of the phase difference between an input impedance, on the primary element side, of an electric quadrupole modelling the assembly formed by the first and second acoustically coupled transducers, with the second transducer in a short circuit and in an open circuit. A system for carrying out such a method is also provided.

Beam delivery and / or beam aiming subsystems included in a fast neutron therapy system. The beam delivery subsystem comprises a beamline having linear and curved portions. Quadrupoles along the beamline focus particles conveyed between an axled input and a neutron source (e.g., beryllium). A bend magnet(s) directs the particles to collide with the neutron source to release neutrons. A gantry (e.g., concrete, steel) includes an annular rim and opposing annular flanges that form a radial cavity and a perimeter “shield zone” channel. A collimator assembly (e.g., steel) projects radially inward from a slot void in the annular rim. A secondary collimator (e.g., steel, hydrogenous material) presents a barrel extending radially toward the gantry isocenter. The two collimators contour the neutrons into a high linear energy transfer (LET) beam. A drive rotates the gantry to set the delivery angle over approximately 360 degrees about the isocenter (e.g., patient table).

The present invention relates to a synchrotron continuous variable energy extraction method, comprising the following steps: using a synchrotron high-frequency system to adjust particle energy so that the particle energy passes through a predetermined variable energy range; during this process, by controlling the synchrotron high-frequency system and the strength of the dipole iron, quadrupole iron, and hexapole iron magnetic fields, the particles are allowed to stably run in a circular orbit of the synchrotron; during the entire process of the particle beam energy passing through the variable energy range, a radio frequency excitation device is used to continuously excite the particles to overflow from a transverse phase space stable region and enter an electrostatic deflector, and the particles are separated from the circular orbit of the synchrotron under the action of the electrostatic deflector, wherein the energy time interval and energy value interval of the particles overflowing from the transverse phase space stable region are sufficiently narrow so as to be considered to meet the requirements of continuous energy extraction.

The invention discloses a current measurement circuit and device for a quadrupole mass spectrometer, and relates to the technical field of current measurement, and the circuit comprises a current input end, an operational amplifier integral output module, a first negative feedback module and a second negative feedback module. The current input end is connected with the operational amplifier integral output module, the first negative feedback module and the second negative feedback module, the operational amplifier integral output module is connected with the first negative feedback module and the second negative feedback module, the first negative feedback module is provided with a first analog switch, and the second negative feedback module is provided with a second analog switch. When the first analog switch is switched off, the first negative feedback module forms a first negative feedback loop; when the second analog switch is switched off, the second negative feedback module forms a second negative feedback loop; the operational amplifier integral output module counteracts the current to be detected through the positive current and the negative current to achieve a balance state, and the output voltage and the input current of the operational amplifier integral output module are in a linear relation. The circuit has the advantages of low cost and high measurement precision.