30 results about "Ionization effect" patented technology

This invention discloses a mass spectrometry ionization method based on the Tesla coil principle. It utilizes a Tesla coil to generate a micro-plasma beam, which serves as the ion source. Liquid samples are desorbed and introduced into the micro-plasma beam region for ionization, or gas samples are directly introduced into the micro-plasma beam region for ionization. This invention, by creatively using a Tesla coil-generated micro-plasma beam as the ion source, not only achieves strong ionization capability and good ionization effect on volatile gas samples and low-polarity or non-polar liquid samples, but also requires sample volumes as low as picoliters to microliters, exhibits good solvent compatibility and strong salt resistance, and further possesses advantages such as simple operation, low cost, ease of implementation, and broad applicability.

The invention discloses a method for enhancing a particulate matter LIBS signal by combining conductive substrate migration with electric arc pre-ablation, and belongs to the technical field of environmental monitoring and spectral analysis. The method comprises the following steps: acquiring a sampling medium carrying atmospheric particulates; physically transferring the atmospheric particulates on the sampling medium to a viscous conductive substrate; a laser-induced breakdown spectroscopy system is adopted, based on the assistance of an electric arc pre-ablation unit, spectral signal collection is carried out on atmospheric particulates migrated to the viscous conductive substrate, and the enhancement effect of the device is verified through experimental comparison. The problems of particulate matter splashing and sampling medium matrix interference are effectively solved through conductive substrate migration, the spectral signal strength and stability are remarkably improved by combining the purification and pre-ionization effects of electric arc pre-ablation, rapid, high-sensitivity and stable detection of trace heavy metals in atmospheric particulates is achieved, and the method is suitable for large-scale popularization and application. And a reliable technical means is provided for environmental heavy metal pollution detection.

The application provides an ion source upper cover assembly and an ion source device. The fixed shielding cage in the ion source upper cover assembly can prevent the annular filament from being directly in contact with external structures to cause deformation or damage. The structure of the annular filament can effectively push the hot electrons emitted by the annular filament towards the ionization chamber, improve the ionization effect, and the ion source device is provided with the annular filament. The annular filament, the ionization cylinder and the shielding cage are coaxial, so that the electrons emitted by the annular filament can move in a more uniform electric field, thereby improving the probability of electron bombardment on the sample gas and improving the ionization efficiency and stability of the ion source device. Meanwhile, the ion source device has a wide range of emission current dynamic interval, strong anti-interference ability and wide range of sensitivity linear plateau area. The total pressure focusing electrode structure in the ion source device can also monitor the vacuum value in the detected space in real time, thereby playing a role in protecting the filament and the vacuum system.

The utility model discloses a magnet device for magnetron sputtering coating, which belongs to the technical field of magnetron sputtering coating, and comprises a back plate, a magnetic bar base and magnetic bars, the magnetic bar base is connected onto the back plate through a plurality of adjusting bolts, the magnetic bar base is provided with three horizontal clamping grooves for correspondingly placing the magnetic bars, the magnetic bars comprise square tubes, and the square tubes are arranged in the clamping grooves. The magnets are arranged in the square tubes, and the magnetic poles of the magnets arranged in the adjacent square tubes face opposite directions. A fixing position is provided through the effect of the back plate, the generated peripheral magnetic field intensity is changed by adjusting the distance between the magnetic rod base and the back plate, the collision ionization effect is changed, the thickness of the film layer is adjusted accordingly, and the production application range is wide; the magnet device adopts the stainless steel square tube to package the magnet, effectively prevents the magnet assembly from being damped and corroded, ensures the position stability of the magnet, avoids the influence of position change on the magnetic field effect, and improves the stability and reliability of the device; and the magnet is convenient to disassemble and assemble and can be reused, so that the production cost is reduced.

The invention discloses a dynamic ionization suppression type high-reliability super junction device and a preparation method thereof. The super junction device comprises a substrate layer, a first epitaxial layer, a super junction voltage-resistant structure, a third epitaxial layer and a fourth epitaxial layer which are stacked from bottom to top, the super junction voltage withstanding structure comprises a first second epitaxial layer of a first doping type to a Kth second epitaxial layer of the first doping type which are sequentially stacked from bottom to top, and two first super junction columns of the second doping type are symmetrically arranged in the two ends of each second epitaxial layer at intervals. Two second super junction columns are symmetrically arranged in the two ends of the third epitaxial layer at intervals, two first wells are symmetrically arranged in the two ends of the fourth epitaxial layer at intervals, and a second well is arranged in each first well. According to the super junction voltage withstanding structure of the super junction device, charge balance and voltage withstanding are maintained, meanwhile, the dynamic incomplete ionization effect is effectively restrained, the instantaneous electric field and Cgd are reduced, and the dv / dt reliability, the conduction performance and the short circuit endurance capacity of the device are improved.

The utility model relates to the technical field of wastewater treatment devices, in particular to a wastewater heavy metal removal device based on an organic sulfur medicament, which comprises a support base and a removal component, and the removal component comprises a filter tank, a water inlet pipe, a filter structure, a conveying part, a reaction box, a mixing structure, a liquid outlet pipe, an electromagnetic valve and a medicament storage box, an electromagnetic valve is opened, an organic sulfur agent in an agent storage box is conveyed into the reaction box through a liquid outlet pipe, then a mixing structure is controlled to enable the organic sulfur agent to be fully mixed with the wastewater, and heavy metal ions such as mercury ions, lead ions and zinc ions in the wastewater are reacted, so that the problem that an existing device for removing heavy metals in the wastewater cannot be used for removing heavy metals in the wastewater is solved. The problems that the cost of removing heavy metal ions through a cathode plate and an anode plate in an ionization mode is high, and when the anode plate and the cathode plate are used for a period of time, the ionization effect is prone to decline, and then the removal effect of the heavy metal ions is affected are solved.

The application discloses a plasma module, a plasma assembly, an air purification assembly and an air conditioner. The plasma module comprises a mounting seat, a magnet, an outer electrode and an inner electrode, an air purification channel is formed between the inner electrode and the outer electrode, when there is a potential difference between the inner electrode and the outer electrode, an electric arc is generated at the annular sharp end of the outer surface of the inner electrode. When the air flows in the air purification channel, due to the increasing trend of the radial gap of the air purification channel from the sharp end to the air outlet, the airflow generates a pull arc, the plasma module ionizes the air to generate a plurality of active free radical groups with strong oxidizing property and high-energy particles, so that the effects of degrading VOC, sterilizing and killing viruses are achieved, the magnetic field is increased by the magnet, the movement track of the charged particles is constrained, the reaction time of the charged particles and the pollutants is increased, the ionization effect and the air purification efficiency are improved. And the sliding arc discharge mode is adopted, and the temperature generated by the plasma module itself can degrade ozone.

The utility model provides an ion migration tube to solve the problem of how to improve the ionization effect of an ion migration tube using an ultraviolet lamp type ionization source on substances. The ion migration tube provided by the utility model comprises a sample introduction piece, an ionization assembly, an ion gate assembly, a migration assembly and an ion receiver, the sample introduction piece is provided with a sample introduction port; the ionization assembly comprises a base body and at least two ultraviolet lamps connected to the base body, the base body is provided with an ionization area, the sample inlet is communicated with the ionization area, and the at least two ultraviolet lamps are circumferentially distributed on the periphery of the ionization area; the migration assembly is provided with a migration area, the ion gate assembly is arranged between the ionization area and the migration area, and the ion receiver is arranged on the side, away from the ion gate assembly, of the migration area.

This utility model discloses an ion generating device for a non-vacuum coating gun, including an ion generating gun. The ion generating gun comprises an ion gun head assembly, an ion gun body assembly, an ignition assembly, and an air inlet connector. The ignition assembly is connected to an external ignition power supply and is inserted into the ion gun body assembly, with a ventilation gap between them. The ignition assembly cooperates with the ion gun head assembly to generate ignition ionization. The air inlet connector is connected to the ion gun body assembly and is provided with an air inlet channel. The incoming air passes through the air inlet channel and the ventilation gap and is ionized into plasma gas at the ion gun head assembly. The ion generating device of this utility model has a reasonable structural design and compact size, making it easy to install and use. It has a better ionization effect, improves the contact reaction between the ionized plasma gas and the chemical solution, and further enhances the coating effect.

The invention discloses a method for accurately separating water from crude benzene based on density detection, relates to the technical field of separation equipment, and aims to solve the problems of how to improve benzene-water separation precision and optimize a separation process. Double separation of benzene and water is formed in the benzene-water interphase process through a double-action drainage mechanism of the diversion drainage assembly and the external drainage assembly; specifically, based on real-time density detection, water is distributed on the outer side and benzene is distributed on the inner side during high-speed centrifugal action, an upper layer and a lower layer of a benzene-water solution are formed through an efficient ionization effect, and two separation actions of the benzene-water solution are completed in a reversing communication drainage mode; and by combining the two methods, double separation of the benzene-water mixture is performed by using different density distribution mechanisms among benzene-water phases and adopting centrifugal action and ionization separation modes, so that thorough and accurate separation is ensured.

The present application relates to molecular beam mass spectrometry instrument, especially to a kind of vacuum ultraviolet light photoelectron ionization source device for molecular beam mass spectrometry.It includes vacuum ultraviolet light source, ionization source cavity, ring electrode, photocathode and differential electrode, wherein vacuum ultraviolet light source is arranged on the side wall of ionization source cavity, ring electrode and photocathode are sequentially arranged in ionization source cavity along the light path direction of vacuum ultraviolet light source, coaxial sampling cone and differential electrode are respectively arranged on the two side walls of ionization source cavity along the direction perpendicular to the light path of vacuum ultraviolet light source, the emitted light of vacuum ultraviolet light source irradiates photocathode to generate photoelectron, photoelectron collides with gas sample entering from sampling cone in ring electrode to obtain gas sample ion, and gas sample ion is output through differential electrode.The present application uses VUV light beam to irradiate molecular beam from side vertical intersection, to achieve threshold ionization effect;Single-photon ionization effect is realized simultaneously.

The application discloses a kind of ground electrode in time domain finite difference simulation soil ionization effect characterization method, including obtaining the geometry of the ground electrode to be characterized, soil characteristics, environment and excitation source parameters, construct electrode in FTDT simulation model;The model is meshed, the absorption boundary condition and simulation total length are determined and initialized;Current density and electric field intensity around electrode are calculated, and soil resistivity is updated;The total resistance of electrode under the distribution of current soil resistivity is calculated, and the equivalent radius of electrode is calculated correspondingly;The correction factor of time domain finite difference is calculated using the equivalent radius of electrode, and then the vertical electric field component parameter of electrode is corrected;When the current simulation length reaches the simulation total length, the ground electrode top voltage, resistance, equivalent radius characterizing soil ionization effect are output;Method can accurately characterize soil ionization effect under coarse grid, greatly improve the calculation efficiency.

This invention relates to the field of computer manufacturing technology, and in particular to a computer host power supply with a negative ion generator. The power supply includes a casing and an air inlet and an air outlet. A detachable dustproof frame is located at the air inlet on the casing. By having high-voltage electrode plates slide along with a scraper, the release point of negative ions changes from static to dynamic coverage, achieving wider air purification. Furthermore, while enhancing the ionization effect, it also breaks down the electrostatic saturation layer of dust on the surface of the collection plate, allowing the electrostatic adsorption capacity to be maintained for a long time, significantly improving the continuous collection efficiency of dust and particles. The auxiliary scraping mechanism works in conjunction with the scraper to automatically remove adsorbed dust and impurities. The dustproof frame is detachable, allowing for easy removal when deep cleaning or maintenance is required, thus achieving efficient, long-lasting, and maintenance-free active purification and dust removal of the air inside the computer case.

This invention discloses a plasma generator and a microwave remote plasma source system. The plasma generator includes a reaction housing and at least one microwave radiation component located within the cavity of the reaction housing. The microwave radiation component includes a metal rod and a heat dissipation insulating tube, the heat dissipation insulating tube completely surrounding the entire outer surface of the metal rod within the cavity of the reaction housing. The metal rod is used to receive microwave energy to ionize process gas within the cavity of the reaction housing. This invention provides a plasma generator and a microwave remote plasma source system that can improve the ionization effect of process gas and the plasma density within the cavity of the reaction housing, as well as improve plasma purity and heat dissipation efficiency of the metal rod.

The embodiment of the invention discloses a high-energy photon ray detection device and a preparation method thereof, which can be used in the field of semiconductor devices, and the device comprises a detector chip, a processor chip and a protective layer. The detector chip and the processor chip are stacked in a three-dimensional manner; and the protective layer surrounds the processor chip and is used for isolating high-energy photon rays. Therefore, the protection layer is arranged between the detector chip and the processor chip which are stacked in a three-dimensional manner, so that the processor chip is surrounded by the protection layer, high-energy photon rays from the direction of the detector can be accurately intercepted, and the generation of an ionization effect is blocked from a ray propagation path; the probability of defects such as oxide layer charge traps and leakage current increase of a processor chip is effectively reduced, the failure risk of the device is remarkably reduced, and the service life of the high-energy photon ray detector is prolonged.

The invention discloses a fast erasing method for a nonvolatile memory based on channel hot electron induced hot hole injection and application of the fast erasing method. In a nonvolatile flash memory with split gates, positive source voltage, positive drain voltage and negative storage gate voltage are applied when a selection gate (MG) and a storage node (MS) are started; high-energy channel hot electrons are generated in the channel; high-density hot holes are generated in a channel region through the collision ionization effect of channel hot electrons; hot holes are injected into the charge trapping layer through the tunneling oxide layer, so that the neutralization of stored electrons is completed, and the erasing operation is realized. According to the invention, the collision ionization effect of hot electrons is utilized to generate high-density hot holes, and the hot holes are injected into the charge trapping layer for rapid erasing, so that the erasing efficiency is remarkably improved, the electric field stress is reduced, and the durability and retention performance of equipment are improved.

The invention discloses a strong terahertz light spot positioning system and method based on a four-quadrant light emitting diode, and belongs to the field of strong terahertz photoelectric detection. The system comprises a four-quadrant detector, a four-channel signal integration unit, a programmable logic unit, a static storage unit, a data transmission module, a power supply module and an upper computer. Due to the collision ionization effect, the four-quadrant detector generates four paths of photoelectric signals under the strong terahertz irradiation condition; the signal is collected and processed by the system through a current integration method, and then the system gives the center position of the light spot according to a four-quadrant positioning algorithm. The terahertz light spot positioning and monitoring device can be used for terahertz light spot positioning and monitoring links in occasions of strong terahertz sources, applications and the like.

The invention belongs to the technical field of cable detection, and particularly relates to a crosslinked polyethylene cable insulation layer by-product detection method, which comprises the following steps: adding n-hexane and isopropanol according to a preset proportion before dilution, combining ultrasonic elution and filtration separation under a low temperature condition, and dissolving small molecule by-products by using the strong polarity of the isopropanol, so as to obtain the crosslinked polyethylene cable insulation layer by-product. N-hexane is used for promoting swelling of polyethylene, and low-temperature ultrasound is used for synergistically reducing viscosity, so that complete extraction of cumyl alcohol and other by-products at low temperature is realized, and the detection precision of the corresponding by-products is improved; meanwhile, the ionization effect can be improved by adopting an ionic liquid injection mode, so that the electrification effect of the supernate is improved, the activeness of the supernate is further improved, byproducts are enabled to be more active in the detection process, and the purpose of improving the detection sensitivity is achieved.

The invention provides an ion generator, a humidity detection device and a humidity detection control method. The ion generator comprises a tip electrode and an electrode position adjusting assembly. Deflection of the tip electrode is achieved through the electrode position adjusting assembly, the angle between the tip electrode component and the compressor terminal is adjusted, and therefore the coverage area, around the compressor terminal, of the tip electrode is enlarged. In addition, extension and retraction of the tip electrode are achieved through the electrode position adjusting assembly, so that the distance between the tip electrode part and the compressor terminal is reduced. The matching degree of the point electrode and the physical structure of the compressor terminal is effectively improved, the ionization effect of the ion generator is enhanced, and then the accuracy of humidity detection of the compressor terminal based on the ionization principle is improved.

The utility model discloses an industrial electrodialysis purification device, which belongs to the field of electrodialysis and comprises an electrodialysis box, an anode plate and a cathode plate are respectively and fixedly mounted on the inner side wall of the electrodialysis box, a purification box is fixedly connected to the upper surface of the electrodialysis box, two sockets are arranged on the upper surface of the purification box, and the two sockets are connected with the electrodialysis box. Two positioning seats are fixedly connected to the upper surface of the purifying box, and a mounting plate is arranged above the purifying box. According to the industrial electrodialysis purification device, the purification box, the insertion opening, the positioning seat, the mounting plate, the filter plate, the mounting seat, the sliding rod, the telescopic spring and the positioning sliding cylinder are arranged, the insertion opening is matched with the filter plate, the filter plate can be conveniently and rapidly replaced and positioned, and the resilience force of the telescopic spring is matched; and the positioning sliding cylinder is in sliding connection with the sliding rod, and the positioning sliding cylinder is in sliding connection with the sliding rod, so that the positioning sliding cylinder can be quickly inserted into the positioning seat, the mounting plate and the filter plate are limited, and the ionization effect on sewage is improved.

The application discloses an air purification device, a purification control method and a refrigeration equipment, and belongs to the technical field of electrical equipment, wherein the air purification device comprises a shell and an ionization module; the shell comprises a side plate and a top plate; the side plate is arranged along the outer periphery of the top plate; the side plate is provided with a plurality of first air inlets distributed along the circumference of the side plate; the top plate is provided with a second air inlet; one of the first air inlets and the second air inlet is an air inlet, and the other is an air outlet; the ionization module comprises a first electrode and a second electrode arranged in a spaced manner with the first electrode; and the first electrode and the second electrode both extend along the circumference of the side plate. High-voltage discharge is carried out by cooperation of the first electrode and the second electrode, so that an ionization effect is generated to purify air, odor molecules can be decomposed, and the air purification device has better effects of removing odor and sterilization, thereby achieving the purpose of removing odor, has high odor removal efficiency, and can be used for removing odor of refrigeration equipment such as a refrigerator.

The application discloses a non-volatile memory fast erasing method based on channel hot electron induced hot hole injection and application thereof. In the non-volatile flash memory with split gate, a positive source voltage, a positive drain voltage and a negative storage gate voltage are applied under the opening of a selection gate MG and a storage node MS, so as to generate high-energy channel hot electrons in the channel. High-density hot holes are generated in the channel region through the collision ionization effect of the channel hot electrons. The hot holes are used to inject the charge trapping layer through the tunneling oxide layer, the neutralization of the storage electrons is completed, and the erasing operation is realized. The application generates high-density hot holes through the collision ionization effect of the hot electrons, and the hot holes are used to inject the charge trapping layer for fast erasing, so that the erasing efficiency is improved, the electric field stress is reduced, and the durability and retention performance of the equipment are improved.

The utility model relates to an electrified grinding device of a grinding disc, which comprises a machine body, a rotary table is arranged in the machine body, a power supply unit is arranged in the rotary table, a base plate which rotates synchronously with the rotary table is arranged on the rotary table, the power supply unit is connected with the base plate, and a grinding cushion which rotates synchronously with the base plate is arranged on the base plate. The grinding cushion is clamped on the base plate, and the power supply unit conducts electricity to the grinding cushion through the base plate. According to the electrified grinding device of the grinding disc, through the structures of the power supply unit, the conductive unit, the lug plate and the like, grinding liquid in grinding work can be ionized, the mobility and adhesion of the grinding liquid can be improved through the ionization effect, uniform distribution of grinding materials and a better lubricating effect are facilitated, and therefore the overall grinding effect is further improved; after the grinding liquid is ionized, charged particles and free radicals can be generated, and the charged particles can remarkably enhance the interaction between the grinding material and the surface of a workpiece, so that the grinding efficiency is improved.

The application discloses a protection circuit for anti-radiation SRAM type FPGA configuration storage array power supply, which comprises a protection voltage generating circuit and a driving circuit. The protection circuit utilizes a branch composed of the protection voltage and a MOS transistor to provide an additional current path for the driving circuit. Under radiation conditions, when radiation ionization effect causes a device to generate surface defects and the threshold voltage of a PMOS power transistor is increased, the power supply protection circuit can protect the SRAM power supply voltage and prevent the SRAM from losing data due to power failure.

The invention discloses a hot cathode ion source and neutron tube, and relates to the technical field of neutron application, and the hot cathode ion source and neutron tube comprises a cylindrical cathode and an end cover cathode arranged at the top of the cylindrical cathode; the anode rod is arranged at the central axis in the cylindrical cathode, one end of the anode rod is close to the bottom of the cylindrical cathode, and the other end of the anode rod penetrates through the end cover cathode and extends to the outside of the cylindrical cathode; the hot cathode is mounted on the end cover cathode, and one side of the hot cathode emits electrons towards the interior of the cylindrical cathode; the shielding cathode is arranged on the side, close to the anode rod, of the hot cathode, one end of the shielding cathode extends into the cylindrical cathode, and the other end of the shielding cathode is fixedly connected with the end cover cathode; the invention also discloses a neutron tube comprising the hot cathode ion source. The technical problems that a neutron tube in the prior art is limited by an ion source, so that the size is large, the ionization efficiency is low, and neutron pulses are not ideal are solved, and the hot cathode ion source and the neutron tube which are small in size and good in ionization effect are provided.

This invention discloses a temperature sensor circuit, belonging to the field of semiconductor integrated circuit technology. It includes: a first NMOS transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, an operational amplifier, an analog-to-digital converter (ADC), and a digital logic processing unit. The gate of the first NMOS transistor is connected to a first voltage, the drain is connected to a power supply voltage, and the source is grounded. The substrate is grounded through the first resistor R1 and simultaneously connected to the positive input terminal of the operational amplifier through the second resistor. The inverting input terminal of the operational amplifier is connected to a reference voltage through the third resistor. One end of the fourth resistor is connected to the positive input terminal of the operational amplifier, and the other end is connected to the output terminal of the operational amplifier. The output terminal of the operational amplifier is sequentially connected to both the ADC and the digital logic processing unit before outputting. This invention utilizes the ionization effect of the transistor to construct a temperature detection circuit, resulting in a simple circuit structure and high measurement accuracy.

The application discloses a nano water ion generating device and an air conditioner, wherein the nano water ion generating device comprises a shell, a moisture absorption assembly, at least one electrode and a voltage interface, the shell is formed with a containing cavity; the moisture absorption assembly is arranged in the containing cavity; the electrode is partially arranged in the moisture absorption assembly, and at least one end of the electrode penetrates out of the moisture absorption assembly; and the voltage interface is connected with the electrode. The nano water ion generating device is low in cost, convenient to use and good in ionization effect.

The utility model discloses an electrode plate and an electrostatic dust collection device, and relates to the technical field of air dust collection. The electrode plate comprises a reinforcing substrate, a conductive layer and two insulating layers. The two insulating layers are oppositely arranged on two surfaces of the reinforcing substrate, the conductive layer is arranged between the reinforcing substrate and any insulating layer, and the thickness of the reinforcing substrate is 0.1-1.5 mm. Compared with the prior art, the electrode plate provided by the utility model has the advantages that the reinforcing substrate which is arranged between the two insulating layers and has the thickness within a certain range is adopted, so that the electrode plate has higher structural strength, is not easy to deform, can effectively improve the stability of the space between the air channels, ensures the ionization effect and further enhances the electrostatic dust collection effect.

The invention relates to the technical field of semiconductor device and integrated circuit radiation effect and radiation hardening, in particular to an instantaneous ionization effect laser simulation device based on light beam regulation and control, which comprises a multi-wavelength nanosecond-femtosecond laser source, a light beam shaping and adjusting light path and a control, test and monitoring system, through the multi-wavelength nanosecond-femtosecond laser source and in cooperation with light beam shaping and light path adjusting arrangement, light field reconstruction and energy regulation and control of laser incident on an object to be measured can be achieved, the requirements of different semiconductor materials and devices of the semiconductor materials can be met, and multifunctional application integration of the laser simulation dosage rate effect and the single event effect can be achieved. Meanwhile, a parameter adjusting module and a frequency doubling conversion module are integrated in the multi-wavelength nanosecond-femtosecond laser source, so that the track distribution of charges generated on the surface of a semiconductor and in the semiconductor is adjusted and controlled by adjusting and controlling laser parameters; and the three-dimensional space resolution and the physical authenticity of laser simulation are effectively improved.

The invention relates to an ion mobility spectrometer, which is characterized in that two same dielectric electrodes form an ion source, the inner wall of a quartz capillary dielectric tube of each dielectric electrode is plated with a metal conductive layer, one port of each dielectric tube is sealed, a metal inner electrode of each dielectric electrode is arranged in the corresponding dielectric tube, and a metal outer electrode of each dielectric electrode is arranged in the corresponding dielectric tube. The metal inner electrode is led out from the other port of the dielectric tube through a metal wire, the port is sealed, and the metal wires of the two dielectric electrodes are connected with the positive electrode and the negative electrode of a high-voltage power supply to form a discharge loop. No discharge gap exists between the metal inner electrode and the quartz capillary glass medium tube, exposure and corrosion of the metal inner electrode are avoided, the service life of the ion source is prolonged, discharge is uniform and stable, the ionization effect is good, and the ion yield is high. In addition, ozone in a closed-loop gas path is decomposed at normal temperature, chemical interference is reduced, and a spectrogram is clean. The method is suitable for the scenes of environment VOCs monitoring, food pesticide residue screening, public safety explosive and drug field detection, medical expiration marker analysis and the like.