32 results about "Electron bombardment" patented technology

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 device for preparing a thin film material by thermal evaporation and electron beam composite epitaxial deposition, which comprises a rack main body, a vacuum cavity and a vacuum pump, the vacuum pump is used for vacuum operation in the vacuum cavity, a cover body is arranged on the vacuum cavity, and the device also comprises a variable temperature sample table arranged in the vacuum cavity, the electron beam evaporation structure is mounted, and a deposition preparation source material is placed; the resistance heat evaporation source is arranged in the vacuum cavity and located under the variable-temperature sample table, the electron beam evaporation structure comprises a sample support, a substrate embedded in the upper surface of the sample support and a tungsten filament clamping plate used for installing a plurality of groups of tungsten filaments, and the tungsten filaments emit electrons to bombard the sample support to heat and prepare a thin film material. The device can support two film material preparation methods of thermal evaporation and electron beam evaporation at the same time, so that the purpose of multifunctional deposition epitaxy is achieved, and material preparation under different process requirements can be met.

The embodiment of the present application provides a beam-down X-ray conversion device. The beam-down X-ray conversion device comprises a bremsstrahlung target and a shielding device. The bremsstrahlung target comprises a target body, and the shielding device has an electron incidence port, a containing cavity and an X-ray emission port, the electron incidence port and the X-ray emission port are communicated with the containing cavity respectively, and the bremsstrahlung target is located in the containing cavity; the electron incidence port is located on one side of the shielding device along a first direction, and the X-ray emission port is located on one side of the shielding device along a second direction; wherein the first direction is perpendicular to the second direction. An opening of the electron incidence port is directed to the target body, so that the target body is bombarded by electrons entering the containing cavity from the electron incidence port. An opening of the X-ray emission port is directed to the target body, so that X-rays generated by the target body are emitted out of the containing cavity. The beam-down X-ray conversion device has high conversion efficiency.

The camera device includes a photocathode having a photoelectric surface, a solid-state imaging element that detects photoelectrons emitted from the photoelectric surface and outputs a detection signal, a vacuum housing that holds the photocathode and the solid-state imaging element in a vacuum state, and a signal processing section that processes the detection signal output from the solid-state imaging element. The solid-state imaging element detects photoelectrons multiplied by electron avalanche multiplication by accelerated photoelectron incidence and outputs a detection signal, and the signal processing section binarizes the detection signal of each frame based on a first threshold value related to a signal intensity set in advance in a manner capable of recognizing the presence or absence of a photon, and performs photon counting by accumulating the binarized signals of the frames after the binarization.

The application discloses an escape electron monitoring method, device and equipment for a tokamak fusion system and a readable storage medium, and relates to the technical field of optical fiber damage positioning. The method comprises the following steps: at least one sensing optical fiber is arranged on the outer surface of the cladding and / or shielding layer of the tokamak device in a poloidal-toroidal integrated winding mode, so that the single sensing optical fiber is continuously distributed on the toroidal path around the tokamak torus and the poloidal path along the height direction of the torus, and a two-dimensional distributed sensing network covering a preset monitoring area is formed; a probe light signal is injected into the incident end of the sensing optical fiber, and a transmission light signal is detected in real time at the outgoing end; whether the sensing optical fiber is irradiated and damaged is judged according to the power attenuation and / or transmission performance change of the transmission light signal; when the transmission light signal is detected to be abnormal, the damage area caused by the escape electron bombardment is positioned according to the overlapping position of the toroidal and poloidal laying paths corresponding to the sensing optical fiber with the abnormality.

The present application relates to the field of pharmaceutical analysis, and more particularly to a method for simultaneously determining the contents of multiple components in Yinhu Ganmao Powder based on GC-MS technology, which comprises a method for simultaneously determining the contents of multiple components in Yinhu Ganmao Powder or volatile oil. The method comprises the following steps: (1) performing GC analysis on the extract of Yinhu Ganmao Powder or volatile oil; (2) performing mass spectrometry identification using a mass spectrometry library, with the mass spectrometry conditions being: ion source is electron impact ionization (EI), energy is 70 eV, ion source temperature is 200 DEG C, interface temperature is 250 DEG C, full scan mode is m / z 45-500, electron multiplier voltage is 1.5 kV, and collision gas is argon (99.99%). The present application establishes a method for simultaneously determining the contents of multiple components in Yinhu Ganmao Powder or volatile oil based on GC-MS technology, wherein more than 50 compounds are identified in the volatile oil of Yinhu Ganmao Powder, and more than 25 compounds are identified in the n-hexane extract of the powder.

The invention relates to a process for preparing a proton-exchange polymer membrane containing a crosslinked ionomer, which process comprises the electron bombardment of an ionomer in the form of a film, the ionomer being a block polymer of formula (A-B)n-A, the symbol A representing a polyvinylaromatic block bearing sulfonic acid functions, the symbol B representing a hydrogenated block of a poly(1,3-diene) or of a copolymer comprising monomer units of a 1,3-diene and of a vinylaromatic monomer, and n being an integer equal to or greater than 1. The membrane for use in a fuel cell or an electrolyser has good properties with respect to water uptake and service life.

The invention provides a preparation method and application of a fiber material with a nanopore structure. The preparation method of the fiber material with the nano-pore structure comprises the following steps: preparing polyether-ether-ketone fibers, constructing a chelate coating formed by chelating phytic acid and strontium ions on the surfaces of the polyether-ether-ketone fibers, and carrying out electron bombardment treatment on the chelate coating to form the nano-pore structure on the surfaces of the chelate coating. The application is that the fiber material with the nano-pore structure is woven into the artificial ligament fabric. According to the invention, the biological activity of strontium, the chelation function of phytic acid and the physical advantages of a nano-pore structure are creatively combined to realize a synergistic effect of multiple functions, continuous and controllable strontium ion release can be provided, osteogenesis biochemical signals can be activated, bionic physical attachment points are provided for cells, cell behaviors are guided, and the bioactivity of the cells is improved. The composite material can be used for adjusting the microenvironment around the implant and relieving oxidative stress injury, provides a novel solution and material for promoting tendon-bone healing and bone regeneration, and has great popularization and application values.

One X-ray source comprising: at least one enclosure configured to contain a first area at a pressure of less than one atmosphere (atm) and configured to separate the first area from an environment outside the at least one enclosure, wherein the at least one enclosure includes a window for x-ray transmission with an x-ray transmittance of more than or equal to 20% for at least some x-rays with an x-ray energy of less than 1 keV; an electron source in the at least one housing, wherein the electron source is configured to produce at least one electron beam; an anode arrangement within the at least one housing, configured to generate X-rays in response to electron bombardment by at least some of the electrons of the at least one electron beam from the electron source; at least one X-ray optic in the at least one housing, wherein the at least one X-ray optic is configured to receive at least a portion of the X-rays from the anode arrangement and to direct at least a portion of the received X-rays towards the window to generate an X-ray beam.

A computer-assisted method for determining an element fraction of a determination element, in particular with a small atomic number, especially lithium, of an examination region of a sample bombarded with primary electrons, wherein a backscattered electron signal, preferably a backscattered electron image, captured using a backscattered electron detector and a spectroscopy element composition of the examination region determined using an X-ray spectroscopy detector, such as an EDX detector, are obtained. A practicable quantitative determination can be achieved if a measured gray value SM determined from the backscattered electron signal is combined with element fractions of the spectroscopy element composition in order to determine a fraction of the determination element. A device for processing data and to a computer product for carrying out the method is also disclosed.

An X-ray generating apparatus and an imaging device. The X-ray generating apparatus includes: a casing; a heat-conduction member, the heat-conduction member being arranged to run through the casing, and a through-channel being provided in the interior of the heat-conduction member, the through-channel being configured to circulate a cooling medium; an anode target, the anode target being configured to receive electron bombardment in order to generate X-rays, and the anode target is arranged in the casing and surrounding the heat-conduction member in a rotatable fashion. The imaging device includes a cooling system and an X-ray generating apparatus. The cooling system is in communication with two ends of the heat-conduction member, and the cooling system is configured to convey a cooling medium into the heat-conduction member.

This invention provides an islandless half-slot folded waveguide slow-wave structure, a slow-wave circuit, and a traveling wave tube. The folded waveguide slow-wave structure includes a multi-periodic cavity structure defined by multiple staggered upper and lower gratings. The folded waveguide slow-wave structure includes a connected straight waveguide section, a waveguide connecting section, and an electron beam channel. The waveguide connecting section includes an inner boundary located within the boundary defined by the electron beam channel. The intersection of the centerline of the inner boundary and the axis of the electron beam channel is located on the inner boundary. This folded waveguide slow-wave structure eliminates the island structure found in conventional folded waveguides, improves the slow-wave circuit's resistance to electron bombardment, and provides stronger structural toughness at the electron beam channel, thus solving the problem of insufficient strength in slow-wave structures at terahertz high frequencies.

The invention discloses a P-type gate enhanced device for an extreme environment and a preparation method of the P-type gate enhanced device. The P-type gate enhanced device comprises a substrate; the middle function layer is stacked on the substrate; the barrier layer is stacked on the side, away from the substrate, of the middle functional layer, and the source electrode makes contact with the surface of the barrier layer; the AlN spacer layer is stacked on one side, far away from the middle functional layer, of the barrier layer, and the drain electrode is in contact with the surface of the AlN spacer layer; the P-GaN cap layer is stacked on one side, far away from the barrier layer, of the AlN spacing layer, and the grid electrode is in contact with the surface of the P-GaN cap layer; the diamond film layer is stacked on the surface of the P-GaN cap layer and covers the source electrode, the drain electrode and the grid electrode. The AlN spacer layer is added between the P-GaN cap layer and the barrier layer, so that the Fowler-Nordheim tunneling probability of hot electrons is remarkably suppressed, the lattice damage chain reaction induced by electron bombardment is blocked, and the interface state density is reduced. And the diamond film layer is arranged, so that the long-term reliability of the device in an extreme environment can be effectively improved by virtue of ultrahigh thermal conductivity, extreme thermal stability and a high irradiation damage resistance threshold value of the diamond film layer.

The invention discloses a method for protecting a high-frequency ceramic window of a cyclotron to reduce electron bombardment. The method comprises the following steps: calculating magnetic field distribution B near the high-frequency ceramic window of the cyclotron; by changing the shape of the high-frequency ceramic window or changing the position of the high-frequency ceramic window or additionally arranging a solenoid on the periphery of the high-frequency ceramic window, the included angle between the magnetic field distribution B direction and the surface of the high-frequency ceramic window is close to 90 degrees, so that bombardment of charged particles to ceramic is reduced, and the stability of the ceramic window is improved. The core value of the invention is to effectively solve the problem of reliability bottleneck caused by electron bombardment of the high-frequency ceramic window in the cyclotron. The biggest highlight of the method is that three flexible complementary technical paths are provided to realize optimal control of the magnetic field angle, and the problem that in the prior art, when a magnetic field distribution B is parallel to a ceramic included angle and a ceramic window feed-in high-power signal is generated, the ceramic is broken due to electron bombardment under the influence of improper magnetic field distribution is solved.

The invention relates to a process for preparing a proton exchange polymer membrane containing a crosslinked ionomer, which process comprises electron bombardment of an ionomer in the form of a film, the ionomer being a block polymer of formula (AB)nA, the symbol A representing a polyvinylaromatic block bearing sulfonic acid functions, the symbol B representing a hydrogenated block of a poly(1,3-diene) or of a copolymer comprising monomer units of a 1,3-diene and a vinylaromatic monomer, n being an integer equal to or greater than 1. The membrane intended for use in a fuel cell or an electrolyzer exhibits good properties with regard to water uptake and lifespan.

An electron bombardment ion source assembly for use in a mass spectrometer and including an anode extending along an axis and surrounding an ionization volume. At least two filaments are each configured to thermionically emit electrons and are positioned outside the ionization volume and proximate to the anode. The at least two filaments each comprise an elliptically-shaped portion and non-elliptical portions on either end of the elliptically-shaped portion. The non-elliptically-shaped portions are configured to be mounted in a fixed position relative to the anode to maintain a constant distance between the elliptically-shaped portion and the anode. The elliptically-shaped portion extends along a plane that intersects a plane perpendicular to the axis of the anode at a non-zero angle.

The application discloses a damage monitoring positioning method and device for a tokamak fusion reactor, and relates to the technical field of damage monitoring. The method comprises the following steps: winding at least one optical fiber sensitive to ionizing radiation on a surface to be monitored of a tokamak torus, so that the optical fiber is arranged along the toroidal direction to form a toroidal optical fiber path and is arranged along the poloidal direction to form a poloidal optical fiber path; injecting a probe light signal into an input end of the optical fiber; collecting a transmitted light signal of an output end of the optical fiber, and monitoring the light intensity attenuation of the transmitted light signal in real time; judging whether the surface to be monitored is damaged by escaping electron bombardment according to whether the light intensity attenuation exceeds a preset threshold; and when it is judged that the damage occurs, determining the damage position according to the toroidal position information corresponding to the toroidal optical fiber path where the light intensity attenuation occurs and the poloidal position information corresponding to the poloidal optical fiber path. The above scheme greatly reduces the system cost and the laying difficulty.

The invention discloses a testing device and a testing method for an X-ray tube anode assembly, and the testing device comprises a housing which is provided with a first side and a second side which are opposite to each other, and comprises an accommodation cavity; the electron emission part is contained in the containing cavity, the electron emission part is used for emitting electrons to an anode target of the anode assembly, the electron emission part is directly or indirectly connected to the first side, the anode assembly is fixedly connected to the second side and points to the direction of the second side along the first side, and the electron emission part is used for emitting electrons to the anode target of the anode assembly. Electrons emitted by the electron emission part bombard a first area of the anode target, and the first area is suitable for simulating an equivalent bombardment area of the anode target in a rotating state during the working period of the X-ray tube; and the detection module is at least used for collecting temperature information of the anode assembly. By adopting the technical scheme of the invention, the test precision of the X-ray tube anode assembly can be improved.

The invention discloses a backside illuminated CMOS chip processing method for electron bombardment imaging, which comprises the following steps of: S1, removing a glass cover plate of a commercial CMOS chip by using an engraving and milling machine to expose the surface of the CMOS chip, and cleaning and drying the surface of the CMOS chip; s2, EDS is used for element analysis and size measurement of the area A of the CMOS chip located on the outer side of the CMOS internal circuit wiring layer and the outer side of the MOS tube structure, and a back-illuminated CMOS chip surface structure and a back-illuminated CMOS chip surface structure are obtained; and S3, after the purple tantalum oxide layer is exposed, cleaning and drying are performed to obtain the backside illuminated CMOS chip for electron bombardment imaging. The passivation layer on the surface of the CMOS chip processed by the method is comprehensively removed, and the processed CMOS chip has an electron sensitive characteristic and can be used for producing EBAPS.

The invention discloses an electrode plate device, an accelerating tube device, an electron accelerator and an accelerating tube for the electron accelerator, the accelerating tube comprises a plurality of electrode plate devices, each electrode plate device comprises an electrode plate main body, a beam hole and an annular conductor, the beam hole is arranged in the center of the electrode plate main body, and the annular conductor is arranged in the beam hole. And the annular conductor is arranged below the electrode plate main body and is coaxial with the beam hole, and the annular conductor is arranged on the outer side of the beam hole and is electrically connected with the electrode plate main body. According to the electrode slice device, the potential difference on the electrode slice can be balanced, the voltage at the position of a beam hole of the electrode slice when the electron accelerator works is reduced, heat generation is reduced, meanwhile, heat dissipation performance is improved, the overall safety of an accelerating tube is improved, the focusing effect can be improved, and stray electrons are prevented from being bombarded to the electrode slice.

The invention discloses a nanoscale electron beam spot testing knife edge, a manufacturing method thereof, a measuring device and a measuring method, and belongs to the technical field of electron beam measurement. The nanoscale electron beam spot testing knife edge comprises a substrate layer, a conductive layer and a slit structure; the substrate layer serves as a knife edge main body material, and the surface of the substrate layer has atomic-scale flatness; the conductive layer is a metal layer deposited on two sides of the silicon nitride film and is used for exporting charges and eliminating charge accumulation caused by electron bombardment; the slit structure is formed through focused ion beam etching, the upper conductive layer is completely etched, then 30-70% of the thickness of the silicon nitride film is etched to form a slit, and the side wall of the slit is used for absorbing scattered electrons; the plane of the nanoscale electron beam spot testing knife edge and the horizontal plane form an inclination angle, so that the incident direction of electron beams is parallel to the side wall of the slit. According to the invention, the collision probability of the electron beam and the edge of the knife edge is reduced, so that the signal-to-noise ratio of the electron beam signal received by the Faraday cup in the moving process of the knife edge is greatly improved.

The invention discloses an EBAPS-oriented low-light image denoising method and system and a data set construction method, which are used for solving the problem of nonlinear noise of an electron bombardment active pixel sensor (EBAPS) under an extremely low-light condition. According to the data set construction method, clear-noisy image pairs of pixel-level alignment are obtained by adjusting the aperture of a light source instead of changing exposure at a fixed geometric position. The denoising method adopts a two-stage neural network, and the core of the denoising method is a frequency domain-based noise estimation module (FANS). The FANS module generates a noise priori parameter accurately corresponding to illumination by calculating an under-curve area (AUC) of a normalized radial power spectrum of an input image. According to the network, by using the parameter, through low-rank guided decomposition (LROD), two-way adaptive spatial fusion (DASF) and other modules, denoising is carried out on a noisy image. According to the method, EBAPS noise under 10 <-5 > lx limit illumination can be effectively removed, and image details are reserved.

The electronic gun comprises an anode, an insulation structure, a cathode supporting piece, a cathode cylinder, a cathode and a focusing electrode, the insulation structure is a conical multi-section insulation structure, the conical multi-section insulation structure comprises a plurality of conical ceramic sections, a metal sealing sheet is arranged between every two adjacent conical ceramic sections, and the metal sealing sheet is arranged between every two adjacent conical ceramic sections. One side, close to the vacuum sealing cavity, of the metal sealing sheet is bent to form an arc-shaped structure. Compared with the prior art, through the synergistic effect of the conical ceramic section and the inwards-bent metal sheet, a normal electric field component facing the surface of the insulator is constructed in vacuum near an insulator-vacuum interface, so that electrons emitted from an insulator-vacuum-metal combination point are far away from the surface of the insulator under the action of electric field force; and secondary electron multiplication caused by electron bombardment on the insulator is avoided, so that the surface flashover voltage is improved.

The invention relates to a method for preparing an anion-exchange polymer membrane which contains a crosslinked ionomer, which method comprises the electron bombardment of an ionomer in the form of a film, the ionomer being a block polymer of formula (A-B)n-A, the symbol A representing a polyvinylaromatic block bearing quaternary amine groups, the symbol B representing a hydrogenated block of a poly(1,3-diene) or of a copolymer comprising monomer units of a 1,3-diene and of a vinylaromatic monomer, n being an integer equal to or greater than 1. The membrane intended for use in a fuel cell or electrolyzer has good resistance to alkaline media.

The invention discloses wastewater advanced treatment equipment with a wastewater recycling function, and belongs to the field of environmental protection and wastewater multi-stage treatment.The wastewater advanced treatment equipment comprises a shell and a liquid inlet part arranged on one side of the shell, and a pulsed electric field reaction treatment part, an electrolytic oxidation part and a magnetic flocculation separation part are arranged in the shell; the pulsed electric field reaction treatment part comprises a treatment cavity I formed in the shell and communicated with the liquid inlet part, a hollow ring body fixedly connected to the inner wall of the treatment cavity I, and a cathode I fixedly connected to the inner wall of the hollow ring body; a pulsed electric field can be formed in the treatment cavity I through an anode in the center of the treatment cavity I and a cathode I on the inner wall of the treatment cavity I, and macromolecular organic matters in the wastewater are subjected to electron bombardment, electrostriction and electroporation effects under the action of the high-intensity electric field; chemical bonds are selectively broken, so that ring opening and chain scission are realized, and the compound is converted into small and medium molecular fragments which are easier to be oxidized subsequently; efficient physical sterilization is realized, and biotoxicity is eliminated.

An oxide decomposition apparatus can include: a housing having a material inlet configured to receive oxide material into the housing, the oxide material including oxygen and an oxide base material; an oxide material holder in the housing and configured to hold the received oxide material; an oxide material heater configured to heat the oxide material held in the oxide material holder; an electron beam gun configured to bombard the heated oxide material with electrons in the housing so that the oxide material is decomposed into oxygen and the oxide base material; and an oxygen collector configured to collect the oxygen in the housing. A method of decomposing an oxide material containing oxygen and an oxide base material can include: heating the oxide material; bombarding the heated oxide material with electrons from an electron gun so that the heated oxide material is decomposed into oxygen and the oxide base material.

The application discloses a sewage treatment process for organic wastewater, and belongs to the field of sewage treatment, and comprises the following steps: S1, pumping wastewater containing nitrogen-containing organophosphonic acid metal complex into a dielectric barrier discharge reactor, and reducing P-C bond energy through high-energy electron bombardment; S2, adding a modified layered metal hydroxide containing intercalated carbon quantum dots and persulfate and black aspergillus immobilized microspheres into the wastewater treated by plasma; S3, using a magnetic layered metal hydroxide material to deeply adsorb heavy metal ions in the wastewater treated by the composite oxidation under a gradient magnetic field; S4, sequentially passing the wastewater after magnetic adsorption through an anaerobic ammonia oxidation coupling reactor and an aerobic biofilm-activated sludge system to degrade pollutants; S5, using a layered immobilized algal-bacterial symbiotic system to remove phosphorus from the wastewater treated by the biological treatment; and S6, terminal magnetic recovery and water disinfection. The application solves the problems of low and incomplete decomplexing efficiency of the prior art.

The invention relates to the technical field of plant active ingredient extraction, and discloses a method for extracting soy isoflavone from soybean meal by using a low-temperature plasma assisted deep eutectic solvent, which comprises the following steps: selecting a deep eutectic solvent with special composition, and extracting soy isoflavone from soybean meal under the action of high-energy electron bombardment and the like of the low-temperature plasma, the deep eutectic solvent can effectively permeate fiber, protein and grease in the soybean meal, soy isoflavone in the soybean meal is rapidly extracted, the extraction rate is remarkably improved, meanwhile, the deep eutectic solvent with special composition selectively does not extract impurities which are easily introduced by a conventional method and are not easy to remove, and therefore the membrane separation technology can be directly used for purification; the whole process is green, pollution-free, low in cost, efficient and high in yield, can be used for continuous operation, and has a wide industrial application prospect.

The embodiment of the application discloses an anti-electron bombardment folded waveguide slow wave circuit, a traveling wave tube and a method, which comprise a slow wave circuit with multi-periodicity formed by a plurality of upper grids and a plurality of lower grids staggered with each other; the slow wave circuit comprises a straight waveguide section, a curved waveguide connecting section and an electron beam channel; characterized in that the curved waveguide connecting section comprises an inner circular arc boundary C in , the inner circular arc boundary C in penetrates the electron beam channel in the wide edge direction of the straight waveguide section. The application provides a folded waveguide slow wave circuit structure, which eliminates the weak point of the conventional folded waveguide slow wave circuit in the high-efficiency slow wave circuit design, and greatly improves the anti-electron bombardment capability of the slow wave circuit.

The invention relates to a target arrangement for generating X-ray radiation, an electron linear accelerator and a fixed anode transmission-type X-ray tube. The invention relates to a target arrangement for generating X-ray radiation, comprising: a heat sink; and-a target element for electron bombardment, said target element being embedded in a cooling body in order to cool the target element and being structurally distinguishable from the cooling body, characterized in that the target element has a subdivided structure that differs from the cylindrical shape.