59 results about "Quadrupole" patented technology

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.

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 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 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.

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.

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 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.

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 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.

The invention relates to the technical field of mass spectrometry instruments, in particular to a bent ion trap, a control method of the bent ion trap and a mass spectrometer. According to the bent ion trap, a bent quadrupole electrode group is designed to be matched with a capture electrode group to form the bent ion trap, corresponding voltage is applied to each electrode of the bent ion trap structure at different time sequences, and ions are accurately controlled, so that the ions can be trapped in a bent part of the bent ion trap; compared with a linear ion trap, the bent ion trap provided by the invention has the advantages that the overall size is obviously reduced, the integration and miniaturization of the ion trap structure are facilitated, and the application range of the bent ion trap is widened. And the ion transmission efficiency is ensured.

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 relates to the technical field of mass spectrum detectors, in particular to a quadrupole mass spectrum detector. The device comprises a case, a front operation panel connected with the front end of the case, and a rear cover plate connected with the rear end of the case; a first insertion plate is fixedly arranged at one end of the top of the front operation panel, and guide rods are distributed on one side of the first insertion plate. Through the arrangement of the front operation panel, the case, the rear cover plate, the lock rod and other structures, the whole device can be conveniently and rapidly assembled subsequently, the whole case is assembled, then connection through bolts is not needed in the subsequent disassembly and assembly process, the whole device is more convenient and rapid, disassembly is easy, and the practicability is high. The whole device can be disassembled without using auxiliary tools, the practicability is higher, during use, only the rear cover plate needs to be inserted into the case, then the front operation panel is connected with the case, and the front operation panel is positioned, so that quick connection of the rear cover plate, the front operation panel and the case can be realized, and convenience and rapidness are achieved.

The present application belongs to the technical field of mass spectrometer, and particularly relates to a mass axis correction method for a quadrupole mass spectrometer. The method obtains the relationship between the mass number and the AC / DC voltage through the ion motion equation in the quadrupole, obtains the relationship between the RF voltage DAC code value and the AC / DC voltage through experiments, and further obtains the relationship between the RF voltage DAC code value and the mass number. Meanwhile, according to the mass axis and resolution correction requirements, the mass axis and resolution coefficient corresponding to multiple mass numbers meeting the requirements are obtained, and finally the mass axis and resolution coefficient in the full mass range are obtained by using polynomial fitting. The present application realizes the consistency of the mass axis and resolution in the full mass range by using the polynomial fitting method, improves the sensitivity at the low mass number end, and further improves the mass axis accuracy and test performance of the instrument.

The application provides a novel plasma detection and analysis device, which comprises an ion extraction module, a transient sampling module, a focusing module, a quadrupole rod area and a signal collection module, the ion extraction module is connected to an ion source, the transient sampling module is connected to the ion extraction module, the focusing module is connected to the transient sampling module, the quadrupole rod area is connected to the focusing module, the quadrupole rod area comprises two groups of electrodes, and the signal collection module is connected to the quadrupole rod area. By adopting the same hardware structure, three kinds of ion analysis applications are realized through different electric field operations and signal collection modes; meanwhile, when mass spectrum energy spectrum mixed analysis is carried out, an energy selection window is not used to filter out ions with different energies, but time of flight is used to distinguish the energy of ions; for ions with different initial energies, only those passing through the pulse gate are measured and counted, so that the measured ion energy spectrum truly represents the energy spectrum of ions in the plasma, thereby obtaining the ability of simultaneously analyzing ion mass and energy.

This application relates to a cascade mass spectrometry system and apparatus. By controlling the combined radio frequency and DC electric fields of a quadrupole mass filter, an ion control unit, an ion trap mass analyzer, and a time-of-flight mass analyzer, functions such as linear ion transport, diverted transport, ion selection, and ion dissociation can be achieved. Combined with voltage timing control of the control unit, switching between three different cascade operating modes—Q-LIT analysis mode, Q-TOF analysis mode, and Q-LIT-TOF analysis mode—can be realized. This mass spectrometry analysis scheme enables multi-stage mass spectrometry analysis and possesses high sensitivity, high resolution, and good qualitative capabilities. By combining the advantages of quadrupole, ion trap, and time-of-flight mass analysis, rapid switching between different operating modes is achieved, effectively expanding the application scenarios of mass spectrometry analysis and demonstrating strong reliability.

The invention discloses a 3D printing manufacturing method of a quadrupole rod mass analyzer for a QTRAP composite mass spectrum system, and belongs to the technical field of mass spectrometer core component manufacturing. Aiming at the problems of low machining and assembling precision, limited material performance, serious thermal mismatch, insufficient structural design freedom degree and the like in traditional quadrupole rod manufacturing, a metal electrode rod is printed by adopting a selective laser melting technology, and high-precision forming is realized through pre-deformation compensation and electrolytic polishing; printing a PEEK-like insulating support structure by adopting a photocuring technology to form functional structures such as self-concentric positioning, internal dot matrix, stress release and the like; and then precise assembly is carried out through a thermal compensation flexible fastening system. Integrated high-precision manufacturing of the metal electrode and the polymer insulation structure is achieved, the electric field uniformity, the structural reliability and the thermal stability are remarkably improved, and the strict requirements of a QTRAP system for ion transmission efficiency and quality analysis precision can be met.

The present invention relates to a residual gas measurement system in a vacuum container, using a chemical reaction calculation model, and a method therefor, and, more specifically, to a residual gas measurement system and a method therefor, in which a calibration parameter for residual gas is calculated using an electron energy density distribution of an ionizer of a quadrupole mass spectrometer and a calibration parameter function calculated using inert gas, and the density of residual gas in a process chamber is measured, on the basis of the chemical reaction calculation model, from a measurement signal of the residual gas received from the quadrupole mass spectrometer.

A method for measuring a variation in a dimension (L) of a mechanical part along a direction called the longitudinal direction (x), includes the steps of: a) providing at least a first and second piezoelectric transducer arranged at two different positions along the longitudinal direction and acoustically coupled via the mechanical part; b) performing, at different times, a plurality of electric measurements in order to determine at least one value of an electric parameter dependent on an off-diagonal term of an impedance matrix of an electric quadrupole modeling the assembly formed by the acoustically coupled first and second piezoelectric transducers; and c) deducing from the results of the electric measurements the variation in the dimension of the mechanical part. A system for implementing this method is also provided.

A quadrupole mass filter (50) has a main-rod section (500) including rod electrodes arranged around a central axis C and a first pre-rod section (501) including pre-rod electrodes. Along with an RF voltage having a frequency corresponding to the m / z of an ion, DC voltage is applied to the pre-rod electrodes. The DC voltage and the amplitude of the RF voltage are determined so that a-value and q-value substantially satisfy the conditions that a≠0, (π−βx·π)N={(½)+m}π and βy·π·N={(½)+n}π, where m, n and N are natural numbers, with the X-axis direction connecting the centers of two rod electrodes facing each other across the central axis in a plane perpendicular to the central axis, the Y-axis direction connecting the centers of the other two rod electrodes in the plane, and βx and βy representing β values (0<β<1) related to a secular oscillation of an ion in the X and Y directions, respectively.

The invention relates to the technical field of transformer station grounding grid evaluation, and provides a dynamic evaluation method and system for power station grounding short circuit transfer potential, and the method comprises the steps: employing a Wenner quadrupole method to measure the apparent resistivity of soil, and constructing an apparent resistivity-depth change curve; reversely deducing the resistivity and the thickness of each layer of soil by adopting an inversion algorithm and combining an analysis kernel function and Bessel function expansion, so as to obtain soil layering parameters of a multi-layer and non-uniform structure; and obtaining a short-circuit current, a grounding grid structure and the obtained soil layering parameters, and obtaining a grounding short-circuit transfer potential of the grounding grid of the to-be-evaluated power station by adopting coupling simulation analysis mixed with a finite element method and a moment method. According to the method, the real soil model is constructed by combining the Wenner quadrupole method measurement and the inversion algorithm, and the finite element and moment method coupling simulation is introduced, so that the grounding short circuit transfer potential is accurately evaluated, and the prediction precision and the system safety under the complex geological condition are remarkably improved.