22 results about "Electron radiation" patented technology

The application relates to the technical field of medical equipment, and particularly provides a medical X-ray imaging device and a solid sealing and filling device thereof. The X-ray imaging device comprises a shell, an X-ray tube is fixedly arranged in the shell, an anode target assembly and a cathode assembly are respectively arranged at two ends of the X-ray tube, and a ceramic tube is arranged between the anode target assembly and the cathode assembly. The anode target assembly comprises a target material and a transmission window, the cathode assembly comprises a filament assembly, the filament assembly emits electrons to the target material in a vacuum environment, and X-rays are generated through the transmission window. A collimator and a baffle are respectively fixedly arranged at two ends of the shell and correspond to the anode target assembly and the cathode assembly, a beam outlet corresponding to the transmission window is arranged at the center of the collimator, and the beam outlet limits the electron radiation range. The X-ray imaging device has the advantages of small volume, wide application range, good insulation effect, strong use environment tolerance, high voltage bearing capacity and excellent radiation shielding performance.

The present invention discloses a method for strengthening the radiation resistance of electronic devices based on perovskite / resin composite materials, which belongs to the field of radiation resistance strengthening. The radiation resistance strengthening method of the present invention includes three parts: preparation of Lewis base-modified perovskite powder, preparation of Lewis base-modified perovskite / resin slurry, and radiation resistance strengthening of electronic devices. A precursor solution containing a Lewis base is added to a reaction solvent containing a ligand and vigorously stirred to obtain a Lewis base-modified perovskite material, which is then compounded with a resin and coated on the surface of an electronic device to achieve radiation resistance strengthening of the electronic device. The interaction between the perovskite / resin composite material of the present invention and the incident high-energy electrons significantly attenuates the radiation energy, thereby reducing the energy deposition in the device and ensuring the electrical performance stability of the electronic device under high-energy electron radiation. It also has broad application prospects in aerospace engineering, radiation medicine, nuclear engineering and other fields.

The utility model relates to a perovskite cell space environment multifunctional protection composite packaging structure comprising a bottom frame, the upper end face of the bottom frame is provided with a containing groove, and a perovskite cell is placed in the containing groove; the composite packaging film comprises an anti-reflection layer, a first packaging film and a second packaging film which are stacked, and the anti-reflection layer is arranged on the upper end face of the perovskite cell; the first packaging assembly is arranged on the upper end face of one side of the bottom frame so as to clamp one side of the composite packaging film; the second packaging assembly is arranged on the upper end face of the other side of the bottom frame so as to clamp the other side of the composite packaging film; and the protective layer comprises an anti-radiation coating and an atomic oxygen protective layer which are sequentially evaporated on the second packaging film, and the anti-radiation coating is coated with the atomic oxygen protective layer. The packaging film provided by the utility model has the advantages of anti-reflection, high and low temperature resistance, electron radiation resistance and atomic oxygen corrosion resistance, and can meet the low-orbit space application of the perovskite laminated cell; and the cost is lower than that of a glass cover plate applied to an existing gallium arsenide solar cell.

The invention discloses a transition radiation polarized wave regulation and control method and system based on an isotropic material. The regulation and control method comprises the following steps: calculating an equivalent current according to an oblique incidence electronic pulse velocity vector and converting the current into a frequency and wave number space; calculating an electron radiation field equation and an interface radiation field equation according to the Maxwell equation set; solving the electron radiation field equation and the interface radiation field equation to obtain an electron radiation field and an interface radiation field; adopting a phase matching algorithm to calculate a total field on two sides of the regulation and control material interface; calculating a transverse magnetic wave far-field radiation angular spectrum and a transverse electric wave far-field radiation angular spectrum excited during electron incidence by adopting boundary phase matching; and regulating and controlling the separation of the transition radiation polarized waves in space according to the relationship between the calculated energy angular spectrum spatial distribution of the transition radiation field and the incident angle of the electronic pulse and / or the electromagnetic parameters of the regulation and control material. According to the invention, the problem that excitation of different modes of transition radiation waves and separation of different modes of radiation fields in space are difficult to autonomously regulate and control in the prior art is solved.

The present invention relates to the technical field of wastewater treatment, and in particular to a low-temperature plasma stirring device for treating oilfield drilling wastewater. The device comprises a stirring shaft and a stirring impeller, wherein one end of the stirring shaft is blocked, and the other end is connected to an inner cavity to form an air inlet. The stirring shaft is provided with a plurality of groups of air outlet holes along its axial direction, the apertures of each group of air outlet holes are different, and a crushing impeller is provided at a portion of the stirring shaft corresponding to the large-diameter air outlet holes, and a spoiler is installed along its axial direction. The present invention introduces a low-temperature plasma external field, and can treat drilling wastewater through various methods such as high-energy electron radiation, oxidation of active particles such as free radicals, and ultraviolet decomposition, thereby improving treatment efficiency while reducing the demand for chemical catalysts, thereby reducing not only capital costs but also environmental pollution. In addition, the stirring impeller and the spoiler are used to significantly improve the liquid-solid mixing in the stirring tank, improve reaction efficiency, and make wastewater treatment more thorough.

The invention provides a PI-based anti-electron radiation composite material and a preparation method thereof, and relates to the technical field of anti-radiation materials.The preparation method comprises the steps that S1, boron carbide powder, a silane coupling agent and an organic solvent are mixed and then subjected to dispersion treatment, and dispersion liquid is obtained; s2, 4, 4-diaminodiphenyl ether and pyromellitic dianhydride are added into the dispersion liquid, then stirring treatment, filtering and defoaming treatment are sequentially conducted, and a composite glue solution is obtained; and S3, coating a mold with the composite glue solution, and carrying out heating treatment to obtain the electron radiation prevention composite material. The composite material prepared by the method disclosed by the invention has relatively low density and relatively good electron radiation resistance.

The invention belongs to the field of photovoltaic packaging, and relates to an organic silicon packaging adhesive film for a space photovoltaic module and a preparation method of the organic silicon packaging adhesive film, the organic silicon packaging adhesive film is prepared by coating on a basement film and thermocuring preforming, the organic silicon packaging adhesive film comprises a composite matrix and a composite radiation-resistant agent, the composite matrix comprises phenyl-containing linear silicone oil, and the composite radiation-resistant agent comprises phenyl-containing linear silicone oil. The phenyl-containing body type silicon resin is in chemical combination connection with the linear silicone oil; the composite radiation-resistant agent comprises titanate modified nano cerium oxide and silane modified nano zirconium oxide which have a synergistic effect; the ultraviolet radiation resistance of the adhesive film obtained by compounding the composite matrix and the composite radiation-resistant agent is 11000 ESH, the electron radiation resistance is 1 * 10 < 15 > e / cm < 2 >, and the temperature resistance range of the adhesive film is-196 DEG C to 400 DEG C.

The utility model relates to a photovoltaic cell testing device in a simulated besides-satellite environment, which is used for testing the performance of a photovoltaic cell assembly in the simulated besides-satellite environment, and specifically comprises a device main body which comprises a main cavity, an upper functional flange, a lower functional flange and a working platform; the vacuum simulation module is used for simulating the vacuum environment of the besides-star surface and comprises a vacuum pump assembly and a pressure measurement and control assembly; the temperature simulation module is used for simulating the environment temperature of the besides-star surface and comprises a heating assembly, a refrigeration assembly and a temperature control assembly; the illumination simulation module is used for simulating the illumination condition of the besides-star surface and comprises an optical window and a xenon lamp light source; and the irradiation simulation module is used for simulating irradiation conditions of the besides-satellite surface and comprises an electron radiation light source and an ultraviolet light source. Compared with the prior art, the device can be used for performing photovoltaic cell performance test on the photovoltaic cell assembly under different environment conditions of simulating a besides-star.

The utility model provides a system for simulating a space orbit electron radiation environment. The system comprises a femtosecond laser generating device, a vacuum chamber, an optical system, a composite target, a magnet for generating a focusing magnetic field, a beam detector and an electron spectrometer, the composite target, the focusing magnetic field, the beam detector and the electron spectrometer are all arranged in the vacuum chamber; the composite target is T-shaped and comprises a target I and a target II which are perpendicular to each other; the femtosecond laser generating device is used for generating femtosecond laser, the femtosecond laser is emitted into the optical system to obtain modulated femtosecond laser, the modulated femtosecond laser is firstly emitted into the composite target middle target I in parallel and then is vertically emitted into the target II, the femtosecond laser interacts with the composite target to obtain an accelerated electron beam, and the accelerated electron beam is emitted into the femtosecond laser. And after passing through the focusing magnetic field, the electron beam is sequentially emitted into a beam detector and an electron spectrometer to obtain an energy spectrum of the electron beam, so that ground simulation of electron radiation environments of different orbits in space can be realized.

A downhole tool is provided that includes radiation shielding using a material that is lighter, stronger, less expensive, and / or more commercially available than tungsten radiation shielding. Such a downhole tool may include an electronic radiation generator that emits photons through a source window located on an outer surface of the downhole tool. A detector may detect at least some of the photons through a detector window. Radiation shielding of the downhole tool may attenuate photons that travel from the electronic radiation generator toward the detector without passing through the detector window. The radiation shielding may include a material that has a density less than 10.5 g / cc and an element of atomic number greater than 40.

A method for producing a power semiconductor device comprises providing a semiconductor body based on SiC, irradiating at least a first portion of a top side of the semiconductor body with low-energy electron radiation, and producing an electrical insulation layer at least in the at least one irradiated first portion.

The invention relates to a method for producing a nonwoven material suitable for removing anions which present a health hazard from an aqueous solution by modifying a surface of the nonwoven material. The method according to the invention has the steps of: a) providing a nonwoven material selected from the group comprising polypropylene, polyethylene, viscose, polyamide, polylactide, polyester, polyethersulfone, polysulfone, and polyvinylidene fluoride; b) applying a coating solution onto the nonwoven material, the coating solution containing polyallylamine hydrochloride (PAH) and / or polyhexamethylene biguanide (PHMB) as a modification reagent; c) treating the nonwoven material and the coating solution with electron radiation; and d) purifying the modified nonwoven material.

The present invention provides a method and system for simulating the electron radiation environment in a space orbit. The system comprises a femtosecond laser system, an optical system, a composite target, a magnet, a beam detector, and an electron spectrometer, all connected in sequence. The method for simulating the electron radiation environment in a space orbit using this system includes acquiring target orbit information and obtaining electron energy spectrum information corresponding to the target orbit; while keeping the laser and target II parameters fixed, varying the density and length of target I, collecting information on the energy and number of electron beams generated by target II, and obtaining electron beam energy spectrum information as well as its corresponding electron temperature and electron cutoff energy; when the electron temperature and electron cutoff energy obtained by adjusting the density and length of target I match those of the target orbit, the target orbit electron radiation environment is obtained. The present invention enables ground-based simulation of the electron radiation environment in a space orbit, filling a gap in the field of ground-based simulation of radiation environments in different orbits.

A method for determining the chemical composition of a sample using electron spectroscopy is described, the method including ablating material from a region by irradiating a surface of the sample with one or more laser pulses on the region, irradiating at least a portion of the region with an excitation beam of electron radiation or electromagnetic radiation, measuring the intensity and energy of electrons emitted from at least a portion of the region of the sample as a result of the excitation beam, and repeating the steps of ablat- ing material, irradiating with the excitation beam, and measuring the intensity and energy to determine a quantitative surface depth profile of the chemical composition of at least a portion of the sample. An electron spectroscopy apparatus for determining the chemical composition of a sample is also described.

The invention belongs to the technical field of medical equipment, and particularly relates to a module-separable CT-Linca structure which comprises an annular rack, a linear accelerator shell, a CT source, a CT detector, a linear accelerator treatment head, an electron radiation field imaging device and a shielding structure. A fixed mounting center connecting line is perpendicular to a separated mounting position center connecting line, a CT source and a CT detector are arranged in the fixed mounting position, the electron radiation field imaging device and the shielding structure are integrated into a separable module and are arranged in the separated mounting position, and the linear accelerator treatment head is integrated into a separable module and is arranged in the separated mounting position; and a storage position is arranged on the linear accelerator shell. The linear accelerator treatment head, the electron radiation field imaging device and the shielding structure are designed into a separable module, and are matched with corresponding quick connection locking, storage grabbing and rotation control mechanisms, so that efficient switching between a CT imaging mode and a radiotherapy mode is realized, the diagnosis and treatment precision and efficiency are improved, and meanwhile, the equipment maintenance cost is reduced.

The present application belongs to the technical field of medical apparatus and provides a treatment device, which comprises a beam limiter, a uniform assembly and an outer cover. The beam limiter has a beam channel for the electron beam to pass through. The uniform assembly is arranged at the end of the beam limiter and has a radiation cavity in communication with the beam channel. The outer cover is made of radiation shielding material and is sleeved on the outside of the uniform assembly. The outer cover is provided with a notch for the electron beam to project. The treatment device of the present application only needs to aim the notch at the patient's lesion before irradiation treatment, and then inject the electron beam, so as to maximize the irradiation of the lesion while reducing the radiation dose to the healthy tissues of the human body, and significantly reduce the toxic and side effects of radiotherapy.

The application provides an anti-electron radiation MOSFET reinforced packaging structure and belongs to the technical field of electronic power devices, and specifically comprises: a first anti-radiation conductive sheet, a second anti-radiation conductive sheet and a buffer conductive sheet; the first anti-radiation conductive sheet and the second anti-radiation conductive sheet cover a MOSFET chip; and the first anti-radiation conductive sheet and the second anti-radiation conductive sheet are both high-Z materials; one end of the first anti-radiation conductive sheet is connected with a source above the MOSFET chip through the buffer conductive sheet; one end of the second anti-radiation conductive sheet is connected with a drain below the MOSFET chip; the first anti-radiation conductive sheet is used for resisting electron radiation above the MOSFET chip; and the second anti-radiation conductive sheet is used for resisting electron radiation below the MOSFET chip. The application realizes a compromise between anti-radiation performance, volume, weight and cost.

This invention discloses an integrated system for purifying CO2 and regenerating O2 in a confined space using low-energy electron radiation, comprising: a CO2 reduction reaction chamber with a reaction cavity inside, a stage for placing a catalyst within the reaction cavity, and an electron gun interface; a low-energy electron source connected to the CO2 reduction reaction chamber via the electron gun interface, with its electron beam extraction port corresponding to the stage; a CO2 enrichment device connected to a circulation pump, containing a CO2 capture module and a heating module connected to the CO2 capture module; the CO2 enrichment device being connected to the CO2 reduction reaction chamber via a pipeline; and a steam generator connected to the CO2 reduction reaction chamber via a pipeline. This invention utilizes controllable low-energy electrons to reduce and regenerate CO2 into O2, achieving timely purification of CO2 and regeneration of O2 in a confined space, solving the problem of non-renewable traditional CO2 capture agents and oxygen generators.

The utility model discloses an underground water purification system based on integration of multiple technologies, which belongs to the technical field of underground water purification and comprises a cylindrical micro-nano molecular sieve, a water inlet pipe is fixedly communicated with the upper surface of the cylindrical micro-nano molecular sieve, and a water outlet pipe is fixedly communicated with the lower surface of the cylindrical micro-nano molecular sieve. Through the arrangement of a water inlet pipe, an extreme ultraviolet light generator, a main water pipe, a first water guide hole, an auxiliary water pipe, a second water guide hole, a multi-component compound filter material, a photocatalytic material reaction assembly and a multi-stage direct-current electrolytic electric flocculation reactor, low-temperature plasma is a substance state generated by converting stable gas into ionized gas by providing energy for the stable gas; the equipment realizes effective treatment of pollutants through the combined action of various methods such as high-energy electron radiation, ozone oxidation and ultraviolet decomposition, has the remarkable characteristics of low energy consumption, high efficiency and no secondary pollution, can filter impurities in sewage through the arrangement of the supporting plate, the filter screen and the cover plate, and also has the advantages of simple structure and low cost. And people can replace and clean the filter screen.

The present invention relates to the field of electron detectors and discloses an ultrafast, high-efficiency electron detector based on nano-polycrystalline boron nitride. The detector comprises a nano-polycrystalline boron nitride scintillator, a light guide, and a photomultiplier tube. The nano-polycrystalline boron nitride scintillator and the photomultiplier tube are connected to the front and rear ends of the light guide, respectively. The nano-polycrystalline boron nitride material of the nano-polycrystalline boron nitride scintillator is produced by epitaxial growth in a chemical vapor deposition furnace using a sapphire single crystal wafer as a substrate and NH3 and BCl3, or NH3 and BF3, as raw material gases. In the present invention, the nano-polycrystalline boron nitride scintillator has a short electron decay time and a high scintillation light yield. When used in an electron detector, it can achieve ultrafast and high-efficiency electron radiation detection. The electron detector of the present invention can be used for secondary electron and backscattered electron detection in electron beam detection systems, providing a new option for electron beam detection technology.

The application belongs to the technical field of spacecraft space radiation shielding, and discloses a polyetherimide composite medium preparation and grounding configuration method and system with deep layer charge-discharge resistance, which comprises the following steps: preparing long rod-shaped zinc oxide nanoparticles; preparing polyetherimide-based composite material film samples, polyetherimide-based composite material sheet samples and polyetherimide-based composite material special-shaped structural members; and applying the samples to grounding configuration in a space radiation environment. The application provides a complete PEI / ZnO composite material preparation process and grounding configuration method, which mainly comprises the preparation of long rod-shaped zinc oxide nanoparticle dopants, the preparation of thin film and sheet-shaped PEI / ZnO composite materials, the preparation of special-shaped PEI / ZnO composite material members, and corresponding grounding configuration methods. Finally, the deep layer charge-discharge resistance of the prepared PEI / ZnO composite material is verified through a vacuum electron radiation experiment.