534 results about "Ionization" patented technology

The invention discloses a non-interception type detector for measuring the beam position and the cross section of proton / heavy ion radiotherapy equipment, and belongs to the technical field of nuclear medicine and electronics crossing. Secondary particles (electrons or ions) obtained after ionization reaction of high-energy protons / heavy ions and residual gas molecules are used as signals, the signals are amplified to reconstruct the original position and cross section distribution of a beam, and the detector is a completely non-interception type detector and can be used as long-term online measurement equipment. According to the invention, the structure of the detector is systematically designed and optimized aiming at the position and section measurement of an extremely weak beam in proton / heavy ion radiotherapy equipment, a test is carried out on an experimental platform, a clear signal image can be obtained, the structure is compact, the performance is good, the work is stable and reliable, and the cost is low. The method is of great significance to debugging, operation and maintenance of proton / heavy ion radiotherapy equipment.

The invention relates to the field of mass spectrometry, and describes a mass spectrometer based on multi-electrode coordination of a Jooden well. A multi-port ion source configured for multi-port input of electrons of ionization of gas molecules in a well and ions in an ion source outside the well, the ports being autonomously usable, comprising two external electrodes and four internal electrodes configured to excite periodic movement of ions in the well along an axis of symmetry and to detect signals caused by ions of secondary potential oscillation in the well, wherein ions are introduced into the trap from an external source with a slot, and ion movement is excited by applying an alternating voltage or the like to the electrodes. Or using a slot to introduce ions from an external source into a well in an external electrode, applying a potential to an internal electrode to create an electric field, the size of which is in a quadratic relationship with the coordinates, the electrodes having a specific equipotential surface geometry. Pulsed potentials can be applied to capture ions, multiple external ion sources can be equipped, and if the ion sources are not combined, each can be provided with a separate port. The mass spectrometer is uniquely designed in the aspects of ion input, excitation, detection, ion source configuration and the like.

The invention belongs to the technical field of microwave plasmas, and particularly relates to a magnetized atmospheric pressure pulse microwave plasma jet discharger. The discharger is reasonable in design, microwave energy is fed into the discharge chamber through the SMA interface, high electric field intensity is formed at the tip of the hollow needle electrode, and fed working gas is disrupted and discharged; a magnet exciting coil outside the quartz tube generates an axial magnetic field inside the quartz tube through direct current, electrons do spiral cycloid motion in an electromagnetic field, and electron cyclotron resonance can be achieved under the field. Through magnetic field constraint, high-energy electrons are constrained in a core area, a motion path is prolonged, effective collision times are increased, gas dissociation efficiency and ionization degree are improved, and collision loss of the electrons and a wall surface is reduced; the plasma jet performance is improved; the device works in an atmospheric pressure environment, does not need a vacuum system, reduces equipment cost and maintenance difficulty, reduces electrode sputtering and cavity corrosion, and prolongs the service life of core components.

The invention provides a target poisoning resisting method and system based on multi-stage pulse reactive sputtering, and belongs to the technical field of magnetron sputtering. According to the method, air serves as reaction gas, a pulse direct-current power source is adopted, and reactive sputtering treatment is conducted on a metal target material; the reactive sputtering treatment comprises a first stage, a second stage and a sputtering voltage feedback control stage in sequence. The sputtering power and the duty ratio are adjusted in three stages, the first stage can stabilize luminance build-up and preliminarily clean the surface of the target material, and the second stage can improve the nitrogen ionization rate (gt; 50%) and suppresses the oxygen ionization rate (lt; and in the sputtering voltage feedback control stage, the sputtering power and the duty ratio are adjusted according to the drop amplitude of the sputtering voltage, an insulating compound layer on the surface of the target material can be efficiently sputtered and stripped, and the poisoning state of the target material is effectively inhibited, so that the method can effectively inhibit target material poisoning, the service life of the target material is prolonged, complex equipment is not needed, and the cost is relatively low.

The invention relates to the technical field of ion characterization and preparation, in particular to a high-throughput preparation mass spectrum device and method giving consideration to high-resolution characterization. The device comprises an ion source, an ion transmission cavity, a quadrupole mass screening cavity, an ion dissociation cavity, an ion deflection cavity, an ion deceleration and deposition cavity and a high-resolution mass spectrum characterization cavity which are sequentially arranged, wherein the high-resolution mass spectrum characterization cavity is formed in one side of the ion deflection cavity in the vertical direction; soft ionization is combined with a quadrupole analyzer to screen ions, the ions are dissociated through a dissociation cavity, an ion deflection cavity is used for selecting a high-resolution characterization or high-throughput preparation function, a high-resolution mass spectrum characterization cavity is used for achieving high-resolution characterization of screened and fragmented ions, and an ion deceleration and deposition cavity is used for high-throughput preparation of the ions. According to the method, perfect compatibility of high-throughput preparation and high-resolution mass spectrum characterization is realized through ion deflection design, and the method has a wide application prospect in the fields of efficient preparation of biological macromolecules, synthetic macromolecules and the like and the like.

Nitric-oxide ionization induced flow tagging and imaging (NiiFTI) is described. In one embodiment a method for characterizing a flow of a gas containing an agent includes ionizing the agent by a source of pulsed light emitting at a frequency overlapping a resonant transition frequency of the agent. In response to ionizing of the agent, a fluorescence of the gas is generated. The method also includes capturing at least one time-delayed image of the flow of the gas, where the capturing is time-delayed with respect to a pulse of the source of pulsed light. The method includes determining at least one property of the flow of the gas by analyzing the at least one time-delayed image of the flow.

The invention discloses a furnace end capable of exciting high-energy plasma through long-distance discharge and an electric flame stove. The furnace end comprises an upper shell, a lower shell, a plurality of plasma combustors, a magnetron and a furnace end fan, wherein the upper shell and the lower shell define a furnace end cavity. According to the microwave-driven gas ionization device, the breakdown working voltage between the anode needle and the cathode tube which are arranged at a long interval is reduced by microwave-driven gas ionization, and the problem of circuit instability is avoided; the magnetron stops working immediately after electrode arc striking succeeds, a special power supply and a cooling system can be omitted, and the failure rate is reduced; the two electrodes are arranged at a long interval, so that the number of times of electron collision is increased by several times, and compared with the prior art, the plasma density is improved, the efficiency is greatly improved, and the electric quantity is saved; the magnetron is directly installed between the upper shell and the lower shell of an existing metal structure of the burner, microwave leakage is effectively prevented, the magnetron does not need to be additionally provided with a shielding piece, the stability of the electric flame stove is effectively improved, and the limited space of the electric flame stove is effectively utilized.

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 method for determining and analyzing primary and secondary elements in dolomite and magnesite based on ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry), and relates to the technical field of determination and analysis of the primary and secondary elements, the method comprises the following steps: obtaining determination samples of the dolomite and the magnesite, pretreating the determination samples, obtaining spectral line interference conditions of each element based on the determination samples, and determining the spectral line interference conditions of the elements based on the spectral line interference conditions; the method comprises the following steps: pre-processing measured data, drawing a calibration curve of each element, obtaining the interference condition of the calibration curve of each element, and carrying out ICP-AES measurement on the pre-processed measured data to obtain a characteristic spectral line. According to the method, the source and the influence degree of the interference spectral line are determined by analyzing the spectral line interference condition, then targeted measures are adopted for correction, and meanwhile, concentration measurement deviation caused by chemical interference, physical interference, ionization interference and other factors is found by evaluating element concentration interference factors, so that the accuracy of the concentration measurement is improved. And correction is carried out by means of optimizing a sample pretreatment method, adjusting instrument working conditions and the like, so that the reliability and the stability of the analysis method are improved.

The invention relates to the technical field of lasers, and discloses a corona-based creeping spark discharge strong pre-ionization pulse gas laser which comprises a main frame chamber, a pre-ionization device is fixedly mounted at the top of an inner cavity of the main frame chamber, a cathode electrode is arranged at the top of the inner cavity of the main frame chamber, and a connecting copper sheet is fixedly mounted on the lateral upper portion of the inner wall of the main frame chamber. A flow guide plate is fixedly installed on the connecting copper sheet, and an anode electrode is fixedly installed at the top end of the flow guide plate. A corona-based creeping spark discharge strong pre-ionization pulse gas laser is characterized in that a pre-ionization area can be formed on a pre-ionization device and structures on the pre-ionization device, electrons in the pre-ionization area move in an accelerated manner under the action of electric field force, and in the movement process, the electrons in the pre-ionization area are separated from the pre-ionization device. And the electrons and other gas particles are subjected to inelastic collision and ionization or excitation, so that high-concentration and uniform initial electrons are generated, a micro-discharge channel is formed, and continuous seed electrons are provided for a core discharge region of the micro-discharge channel.

The present invention relates to a spacecraft electric thruster particularly suitable for both propellant-fed and air-breathing electric space propulsion comprising an ionization chamber (11) for plasma generation which develops along a central development axis (X), wherein the ionization chamber (11) has a chamber inlet (12) configured to allow gas inflow and a chamber outlet (13) configured to allow extraction of ionized gas particles; a power injection assembly (30) configured to perform electron heating for plasma generation inside the ionization chamber (11); a magnetic assembly (20) configured to generate a magnetic field for plasma confinement in the ionization chamber (11); and an ion extraction and acceleration assembly (40) configured to extract ionized gas particles from the ionization chamber (11) through the chamber outlet (13) and accelerate them along an ion acceleration direction (Z), wherein the power injection assembly (30) comprises a microwave power delivery system (31) configured to deliver an electric field oscillating at a selected microwave frequency (f) and to inject the generated oscillating electric field in the ionization chamber (11), and wherein the ionization chamber (11) comprises a plurality of walls (11a, 15,16,41) closed to the passage of microwaves apart from a portion of at least one lateral wall (11a) of the plurality of walls (11a, 15,16,41) at which the power delivery system (31) is coupled to inject the generated oscillating electric field in the ionization chamber (11), and is resonant for electromagnetic fields oscillating at the selected microwave frequency.

The invention discloses a method capable of reducing the refrigeration interval of rare earth fluoride, and belongs to the field of magnetic functional materials. According to the method, diamagnetic ions K < + > are added into rare earth fluoride to reduce magnetic interaction among rare earth ions, so that a magnetic phase transformation point moves to a lower-temperature region, and a lower magnetic ordered temperature and a lower refrigeration interval are obtained while large magnetic entropy change is ensured. The series of materials are LnF3 (Ln = Tb, Dy, Ho, Er, Tm) powder samples and KLn1. 4F5.2 powder samples obtained after K < + > ions are introduced. In order to explore the influence of the addition of K < + > on the magnetic ordered temperature, a 100Oe variable magnetic field is respectively applied to the series of materials. The introduction of K < + > enables the Curivus temperature of the material to be obviously reduced to 3K or below. By comparing the effects of K < + > with different contents on the overall performance of the material, the optimal ratio of K / Gd is found, and under the optimal ratio of LnF3 series samples, before and after the K < + > is introduced, the changes of theta CW values are 4.34 to 2.04 K, 5.31 to 1.76 K, 8.31 to 2.54 K, 14.74 to 1.73 K and 3.59 to 1.75 K in sequence.

Embodiments pertain to a laser arrangement configured for enhancement of an ionizaon process of molecular oxygen by causing a two-photon-based transion followed by a (e.g., disnct) third photon- based transion for ionizing the molecular oxygen. In some examples, the laser arrangement comprises at least one laser source configured to output towards at least one oxygen molecule laser light having mulple wavelengths (WL), as follows: outpu[ng at least one electromagnec (EM) radiaon within a first WL range adapted to cause two-photon-based excitaon of the molecular oxygen into a (e.g., disnct) excited state; and outpu[ng at least one addional EM radiaon that is within a second WL range adapted to cause ionizaon of the molecular oxygen from the (e.g., disnct) excited state.

The invention relates to a gas supply method and device based on nitric oxide controllable pulse ionization generation and a nitric oxide therapeutic apparatus, and the method comprises the steps: carrying out the feature extraction of different dimensions of a to-be-ionized gas, and obtaining the basic features of an ionization environment and the component features of an ionization medium; generating a pulse ionization control sequence according to the basic characteristics of the ionization environment, the component characteristics of the ionization medium and the historical pulse ionization control sequence sample; the pulse ionization control sequence is sent to the ionization generation device to execute pulse ionization operation, a nitric oxide gas product is generated, and gas supply operation is executed according to the generated nitric oxide gas product; monitoring a real-time ionization process state of the pulse ionization operation, and generating a real-time ionization process state set according to an ionization discharge intensity characteristic, a medium temperature distribution characteristic and a gas generation rate characteristic in the real-time ionization process state; and performing matching analysis on the real-time ionization process state set and historical real-time ionization process state characteristics to generate a new pulse ionization control sequence.

A kind of vacuum system for nanodose detector gas density precision control belongs to ionizing radiation nanodose measurement field.The present application includes vacuum pump group unit, vacuum degree detection unit, logic control unit.The present application is aimed at the requirement of nanodose detector to vacuum degree and gas concentration, and realizes that working air pressure is in 1Torr by the pump group in vacuum system and the cooperation of PLC logic control and data monitoring, and gas pressure control precision reaches 0.01Torr.The system can provide ionizing radiation gas and low vacuum environment for nanodose detector, ensure that nanodose detector measurement signal is accurate and stable.The ionization degree of nanodose detector depends on the vacuum degree in cavity, and the vacuum degree of cavity depends on the concentration of gas in sensitive volume.The present application has the advantages of high precision, high accuracy, high reliability and the like.Through the present application, the vacuum environment of nanodose detector can be constant and sensitive gas is single, which can support the accurate measurement of nanodose detector.

The invention discloses a vacuum coating process suitable for an ultrathin film layer circuit board and a coating device thereof, and relates to the technical field of vacuum coating. Comprising the following steps: transferring a circuit board substrate to a vacuum chamber, inputting argon into the vacuum chamber, ionizing the argon into argon ions with positive charges, accelerating the argon ions with positive charges to move towards the surface of a target material with negative charges under the action of an electric field, and knocking out evaporated substance atoms or molecules on the surface of the target material. Positively charged argon ions bombard the surface of the target material after being accelerated by an electric field, so that molecules of an evaporation substance on the target material release high-energy particle flow with high kinetic energy, and the particles move along irregular paths in a plasma environment to effectively cover fine gaps, edges and three-dimensional surfaces of a complex structure of a circuit board, so that the surface of the target material is effectively protected. And the particles can quickly and uniformly form an ultrathin film layer on the surface of the circuit board, so that the probability of non-uniform film thickness distribution caused by vapor natural deposition film coating is reduced, and the film coating effect of the device is improved.

The invention relates to a device and a method for applying matrix material for matrix-assisted ionization, in particular for applying matrix material for matrix-assisted laser desorption / ionization. The invention also relates to the use of a device according to the invention for applying matrix material for matrix-assisted ionization. The invention also relates to the use of a sample carrier comprising matrix material for matrix-assisted ionization, which has been applied by means of a method according to the invention, for ion spectrometric analyses.

The present invention provides a method and system for detecting the neutralization ability of PFG, wherein the method includes: turning on the PFG and using the PFG's gas supply system to deliver an inert gas into the ionization chamber; providing cations and electrons generated by the ionization of the inert gas into the shielding cover of the ion detection module; using the cation detection cup of the ion detection module to detect the distribution of the cations in a direction parallel to the wafer surface; and obtaining the distribution of the electrons in a direction parallel to the wafer surface based on the distribution of the cations. The present application uses the cation detection cup to detect the distribution of cations emitted by the PFG to reversely characterize the distribution of electrons emitted by the PFG in the horizontal direction, thereby effectively detecting whether the overall distribution of free electrons drawn out of the PFG chamber can meet the requirements of positive ions (ion beam current), thereby realizing the detection of the neutralization ability of the PFG.

A novel method for artificial photosynthesis utilizing a chemical system that operates by harnessing visible light and directly capturing carbon dioxide and water from the atmosphere. The system is based on self-organizing complexes comprising visible-light-sensitive chromophores, such as 2-phenyl indole and 2-phenyl benzoxazole, along with titanium tetrachloride, which autonomously perform continuous, complex chemical operations to produce long-chain (C2 to C17) oxygenated organic materials. The process employs earth-abundant metal coordination compounds, including titanium (Ti), zirconium (Zr), hafnium (Hf), and vanadium (V), in the solid state. These compounds form carbonated metal derivatives upon hydrolysis, which are subsequently reduced through proton transfer from water. The system initially generates C1 materials that oligomerize via a novel self-catalyzed mechanism intrinsic to the system's operation. Monitoring and characterization of the chemical transformations have been conducted using high-resolution MALDI-TOF (matrix-assisted laser desorption ionization-time of flight) mass spectrometry, supported by infrared (IR) spectroscopy and nuclear magnetic resonance (NMR) analysis. This innovation represents a sustainable and scalable approach for converting atmospheric CO2 into valuable organic materials.

The invention discloses a gas exchange device in front of a sample introduction cone of an inductively coupled plasma mass spectrometer, the gas exchange device in front of the sample introduction cone is arranged outside an ICP torch tube in a sleeving manner, and the gas exchange device in front of the sample introduction cone is mounted on a partition plate around the sample introduction cone; the sample injection cone front gas exchange device comprises a porous breathable layer and a shell; an argon inlet is formed in one end, close to the sample introduction cone, of the shell; one end, far away from the sample introduction cone, of a space between the porous breathable layer and the ICP torch tube is opened and is communicated with the atmosphere. According to the invention, the environmental gas components in the space between the ICP torch tube and the mass spectrum interface device are exchanged into the preset clean gas, so that the sample ionization process is not interfered by the environmental air components, a lower noise baseline is obtained, and meanwhile, the generation of environmental component ions such as nitrogen oxide ions which possibly interfere mass spectrum analysis is reduced; the sensitivity of mass spectrometry detection and the environment anti-interference capability are improved.

This allows for the measurement of the vacuum level in a vacuum chamber and provides an analytical device that can be miniaturized. [Solution] The analytical device comprises an ionization unit that generates ions by ionizing a sample, a vacuum chamber into which ions are introduced and the inside is kept under vacuum, a detector that detects ions, and a small vacuum gauge 1 that measures the vacuum level of the vacuum chamber. The small vacuum gauge 1 includes a cylindrical CAN package, a substrate housed within the CAN package, and a vacuum level sensor formed on the substrate.

The invention discloses an ionization device. Electrospray is an ionization mode, and after the electrospray is combined with a mass spectrometer or an ion mobility instrument, atoms and molecules can be analyzed or some microorganisms or cells can be directly analyzed. Based on the process that liquid fluid is atomized and expanded firstly and then gaseous fluid is compressed before entering an instrument in the electrospray process, a geometric structure cavity matched with the liquid fluid in shape is designed and used for spraying. By means of the mode that the shape is matched with the introduction process of the fluid, spray moves forwards as much as possible in a laminar flow mode, so that more stable spray fluid is obtained, and ions can be better introduced into an instrument for analysis.

The present invention relates to a method and a device for purifying outdoor and indoor air contaminated with solid particles. The method comprises a specific sequence of measures to promote the aggregation and / or coagulation of the particles, including ionization, followed by a series of filtrations. The invention comprises a device for implementing the method.

A data-dependent analysis (DDA) mass spectrometry technique involves ionizing a sample to generate sample ions, analyzing the sample ions by performing one or more MS1 mass analysis scans to obtain MS1 ​​data, identifying one or more precursor ions from the MS1 data, and subsequently analyzing the sample ions by performing one or more MS2 mass analysis scans. Each MS2 scan targets one of the one or more precursor ions identified from the MS1 data.The procedure further includes, for each of the one or more precursor ions identified from the MS1 data: determining a value from the MS1 data that is indicative of a collision cross section (CCS) of that precursor ion; and selecting, based on the CCS-indicative value(s), which precursor ion(s) the one or more MS2 bulk analysis scans should target, and / or determining, based on the CCS-indicative value(s), an order in which the one or more MS2 bulk analysis scans should target the precursor ions.

To stably form an insulating film of high quality in a reactive ion plating apparatus and method.SOLUTION: In the reactive ion plating apparatus 10, an evaporation material 24 stored in a crucible 20 is heated and evaporated by an electron gun 22. In addition, the ionization power Wd is supplied to the crucible 20 as an anode and the hot cathode filament 34 that emits thermoelectrons as a cathode. Accordingly, the plasma 100 is induced. Further, the reactive gas is introduced into the vacuum chamber 12 through the hollow anode 46, and the hollow anode power Wh is supplied to the hollow anode 46. Accordingly, the hollow anode plasma 200 is induced. A hollow anode filament 48 is provided at a gas discharge port of the hollow anode 46. The hollow anode filament 48 becomes a stable anode by being heated by Joule heat.SELECTED DRAWING: Figure 1

A gas separation device for separating and containing various types of gases from a collection chamber based on different atomic masses is disclosed. The chamber is connected to an ion diverter by a valve that, when opened, allows various types of gases to migrate from the collection chamber to an ionizer in which the gases are ionized. The ionized gas is accelerated by the ion accelerator and distributed into the ion deflector. The ion deflector includes a magnetic field within a channel defined by a pair of split-pole magnets. The trajectory of the ions is based on the ion mass of the separated ions. A plurality of collectors are located at different locations on the exit side of the ion deflector for receiving different ions moving along respective trajectories.

A high-power, high-temperature-stability M-type strontium ferrite belongs to the field of ferrite material preparation technology. The ferrite comprises a main formulation of SrCO3, La2O3, CaCO3, MnO, SnO2, Fe2O3, and Co2O3, and additives composed of CaCO3, SiO2, H3BO3, and La2O3. This invention introduces Sn-Mn ions for co-substitution, thereby constructing a Sn... 4+ -Mn 2+ The charge balance mechanism effectively suppressed the Fe ionization induced by the introduction of high-valence ions. 3+ To Fe 2+ Price change behavior, effective compensation after replacement due to the introduction of non-magnetic Sn 4+ This results in a loss of lattice magnetic moment. Simultaneously, through a stepped pre-sintering and sintering process, a CoFe2O4 hard magnetic spinel phase is induced to precipitate in the M-type strontium ferrite main phase. The negative coercivity temperature coefficient of the CoFe2O4 phase complements the inherent positive temperature coefficient of the matrix.

The invention discloses a plasma electrospray fusion ionization source and mass spectrum combined system and a detection method. The plasma electrospray fusion ionization source and mass spectrum combined system comprises a coaxially nested electrospray needle, a sample injector, an ultrahigh voltage generator, a grounded metal grid mesh, a mass spectrometer and a detector thereof. A grounded metal grid is installed between a spray needle and a mass spectrum inlet, voltage is applied to the spray needle, carrier gas is excited to generate plasmas, the macroscopic plasmas at the front end of the spray needle are fused with electrospray, and the plasmas and micro-droplets at the tip of the spray needle are fused. According to the unique ionization source constructed by the plasma-micro-droplet fusion system, on one hand, the ionization efficiency is improved, mass spectrum signals are enhanced, the application range of analytes is widened, excellent sensitivity to high-polarity compounds is kept, and effective ionization and detection of low-polarity compounds are achieved; on the other hand, higher energy and active species are provided for the micro-droplet reaction, the energy barrier required by traditional synthesis is broken, and efficient spontaneous product generation of the micro-droplet chemical reaction is achieved.

The utility model discloses a plastic particle cooling and deodorizing device, which belongs to the technical field of plastic particle processing devices and comprises a base. The buffering assembly is connected to the base; the cooling and deodorizing mechanism comprises a reaction frame connected to the top of the buffer assembly, a rotating disc is fixedly connected to the reaction frame, a spiral channel is defined by the rotating disc and the reaction frame, the top of the reaction frame communicates with an air inlet pipe, and the side portion of the reaction frame communicates with a plurality of air outlet holes; one end, far away from the reaction frame, of each air outlet hole points to the spiral channel. According to the utility model, an external compressed nitrogen source fills compressed nitrogen into the reaction frame through the gas inlet pipe, the electrodes are electrified to generate a high-voltage electric field, ionize nitrogen, generate high-energy electrons and free radicals, and react and absorb volatile organic compounds released by plastic particles to finish deodorization; and meanwhile, redundant nitrogen is discharged from the air outlet holes, and heat dissipation is conducted on the plastic particles in the spiral channel.

The invention discloses a modeling method for a streamer discharge process in natural ester insulating oil by considering ionization in bubbles. The modeling method comprises the following steps: 1) constructing a two-dimensional non-axisymmetric model for simulating discharge of bubbles to streamers in the natural ester insulating oil under lightning impulse voltage; 2) introducing a plasma chemical reaction, and constructing a natural ester insulating oil stream discharge electrohydrodynamic model coupled with an ionization process of gas molecules in bubbles; and after a set voltage is applied to the two-dimensional non-axisymmetric model, the natural ester insulating oil streamer discharge electro-hydrodynamic model simulates a natural ester insulating oil streamer morphology evolution process. According to the method, the drift-diffusion-reaction process of the plasma in the bubble and the Poisson equation are subjected to self-consistent solution, and the plasma generation process in the bubble under the strong electric field is integrated into the existing streamer discharge model, so that the method is beneficial to understanding the liquid dielectric breakdown theory.