51 results about "Beryllium window" patented technology

The invention discloses a soft X-ray imaging device for a vacuum flight pipeline, which belongs to the technical field of X-ray imaging, and comprises: an X-ray tube, a sample stage, a vacuum flight pipeline and an X-ray camera; two opposite end faces of the vacuum flight pipeline Coaxial through holes are processed, and the incident beryllium windows and the exit beryllium windows are respectively installed on the two through holes to close them, and the inside of the vacuum flight pipe is in a vacuum state; the vacuum flight pipe is located between the X-ray tube and the X-ray camera , the sample stage used to fix the sample is located between the X-ray tube and the vacuum flight pipe, and the incident beryllium window of the vacuum flight pipe is close to the sample stage, and the exit beryllium window is close to the recording surface of the X-ray camera; the X-ray tube The X-ray emission source point, the center of the sample, the center of the incident beryllium window and the exit beryllium window, and the center of the recording surface of the X-ray camera are located on the same straight line; the device can perform soft X-ray imaging on the sample in the atmospheric environment.

This invention refers to a method for making a device for neutralizing surface static electricity on liquid crystal and semiconductor chip using positive /negative ion generated by x-ray radiating air and soft x-ray tube thereof. Said invention contains head part for anti-static electricity of directly ionizing gas molecular, protector for protecting operator, power source control part for controlling filament current and target voltage used for controlling ion generation and soft x-ray tube for generating high energy x-ray. Said soft x-ray tube is made by firstly producing ceramic tube metal spray film, then coating anode material on beryllium window board, electroplating tungsten on beryllium window, finally making high vacuum brazing. Said invention can neutralize static electricity in combustible powder.

The invention relates to a seabed in situ X fluorescence measurement influence supervision method and device. The method includes the steps: building a Monte Carlo model, and simulating by the Monte Carlo model, to obtain the transmittance of a target element characteristic X ray under a beryllium window containing no impurities and having different thickness; according to the transmittance and with combination of beryllium window security theory analysis results, determining the optimal thickness of the beryllium window; simulating by the Monte Carlo model to respectively obtain the relationships between the target element characteristic X ray intensity and the target element content under conditions that the beryllium window thickness is the optimal thickness and the beryllium window contains impurities and conditions that the beryllium window thickness is the optimal thickness and the beryllium window contains no impurities, and comparing to obtain a comparison result; according tothe comparison result, judging whether the target element characteristic X ray intensity is affected when the beryllium window contains the impurities, and if the target element characteristic X ray intensity is affected when the beryllium window contains the impurities, correcting the target element characteristic X ray intensity when the beryllium window contains the impurities. The seabed in situ X fluorescence measurement influence supervision method provided by the embodiment of the invention effectively improves the accuracy of the measurement result.

The invention discloses small-beam-spot X-ray equipment. A conventional filament electronic gun has the defects of large area of a cathode emitting point source and larger size of an electronic source size. A field emitting electronic gun cathode device is arranged in a X-ray sealing sleeve; the field emitting electronic gun cathode device comprises a field emitting filament connected with a flashing power supply; a field emitting power supply is connected between the field emitting filament and a field emitting power supply anode; the field emitting filament is used for emitting electronic beams under a strong electronic field generated by the field emitting power supply; the electronic beams move towards an accelerating power supply anode through an accelerating power supply, and obtain high energy and become high-energy electronic beams after being accelerated; the high-energy electronic beams are irradiated onto a target cooled by using an annular target cooling water device to generate X-rays; and the generated X-rays are emitted out of the X-ray sealing sleeve through a beryllium window. According to the small-beam-spot X-ray equipment, the electronic beams of very small beam spots generated by a field emitting cathode are used for exciting an anode target, and the light spot effects of the X-rays can reach an approximate spot light source effect.

The invention relates to a welding method and welding equipment for an X-ray tube beryllium window. The welding method carries out welding by adopting the welding equipment for the X-ray tube beryllium window. The welding equipment for the X-ray tube beryllium window comprises a frame and a beryllium window compaction structure for fixing a beryllium window processed part in the frame. The beryllium window processed part is composed of a beryllium window bracket, a beryllium sheet and solder. The frame is different from the beryllium window compaction structure and the beryllium window bracketin coefficient of thermal expansion, and the frame, the beryllium window compaction structure, the beryllium window bracket and the beryllium sheet can tolerate temperature and pressure in thermal treatment. The welding method comprises the following steps of S1, cleaning up an X-ray tube beryllium window part, the frame and the beryllium window compaction structure; S2, fixing the beryllium window processed part in the frame through the beryllium window compaction structure; S3, carrying out thermal treatment on the frame where the beryllium window processed part and the beryllium window compaction structure are fixed; and S4, carrying out leak detection on the thermally treated X-ray tube beryllium window. The invention further comprises the X-ray tube beryllium window welding equipment. The welding equipment is concise in structure, convenient to use, low in cost and equipment-saving, and improves the processing quantity.

The invention discloses a beryllium window sealing method. The method includes the steps: immersing a beryllium sheet in a mixed liquid of sulfuric acid and hydrogen peroxide with a mass ration of 9:11, the temperature of the mixed liquid being controlled within 50-55 DEG C, and the reaction time being 13-17s; cleaning the immersed beryllium sheet with deionized water for 8-12min, drying the beryllium sheet in a 75-85 DEG C baking oven, and storing the dried sheet in a vacuum cabinet for standby application; selecting copper as a core metal of an output window, performing a sealing step at the heating rate of 3 DEG C/min for 60min at the holding temperature of 730 DEG C, then making the temperature rise to 800 DEG C and the holding time last 8min, the beryllium sheet, the copper and a solder dissolving each other at the temperature of 800 DEG C, forming a metallic compound of the beryllium sheet, the copper and the solder on a sealing surface, and thus forming a firm and airtight soldering surface. The sealing reliability of the beryllium window is guaranteed, and the beryllium window can be greatly applied to ray tubes. The well sealed output window exhibits firm and reliable solderability. The output window can stand repeated thermal shock at the temperature of 800 DEG C, and the leak rate of the output window is better than 10<-9>pa.m<3>/s.

The invention provides a polyimide/carbon nano-tube X-ray window thin film and a preparation method thereof, relates to the field of material testing in X-ray application and particularly relates to an X-ray window thin film and a preparation method thereof. The invention aims at solving the problems that a beryllium window prepared by the prior art cannot be exposed to air to be used due to toxicity and is difficult to machine. The polyimide/carbon nano-tube X-ray window thin film is prepared from a modified carbon nano-tube, a diamine monomer, a dianhydride monomer and an organic solvent. The preparation method comprises the following steps: one. premixing so as to obtain a premixing liquid; two. carrying out final mixing so as to obtain a colloid to be coated; and three. carrying out coating and hot-imidization treatment, thus obtaining the polyimide/carbon nano-tube X-ray window thin film. The preparation method is mainly used for preparing the polyimide/carbon nano-tube X-ray window thin film.

The invention discloses an X-ray transmission device under a strong magnetic field. The device comprises a capillary optical lens and a stainless steel vacuum pipeline. The capillary optical lens is connected with one end of the stainless steel vacuum pipeline. The capillary optical lens focuses X-rays emitted by a light source into approximately parallel light; and the approximately parallel light is transmitted in the stainless steel vacuum pipeline and can be transmitted to a sample position in a strong magnetic field environment. The stainless steel vacuum pipeline is provided with a vacuum meter and an extraction opening; the vacuum degree condition in the stainless steel vacuum pipeline is monitored through the vacuum meter; and the stainless steel vacuum pipeline is vacuumized through the extraction opening. Two ports of the stainless steel vacuum pipeline are connected with flanges respectively and beryllium windows are welded to the flanges. The two ports of the stainless steel vacuum pipeline are sealed through the beryllium windows. With the disclosed device, the X-rays can be transmitted to the central position of the strong magnet cavity remotely, so that the intensityloss in the X-ray transmission process is reduced effectively and the X-ray radiation is protected.

The invention discloses a vacuum dynamic sealing mechanism for soft X-ray collimation and flux regulation. The mechanism comprises a vacuum system, a beryllium window regulator and a pinhole regulator, two sides of the beryllium window regulator are respectively connected with the vacuum system and the pinhole regulator, and through the vacuum system, the beryllium window regulator and the pinholeregulator, an integrated structure of soft X-ray collimation and flux adjustment is realized. The mechanism has the advantages that a vacuum pipeline, a pinhole adjuster and a beryllium window adjuster are adopted, the problems of air absorption, collimation, flux adjustment and the like which are often met in soft X-ray measurement are effectively solved at the same time, and the mechanism is quite suitable for a magnetic confinement nuclear fusion device.

The present invention relates to a multifunctional X-ray diffractometer in-situ battery reaction chamber, which comprises: a base, the middle part of which is a circular base through groove, and the circular base through groove forms an upward annular protrusion relative to the peripheral part of the base; a negative electrode pedestal, wherein the middle part of the negative electrode pedestal isprovided with a circular pedestal through groove with an internal thread, and the pedestal through groove forms a downward annular protrusion relative to the peripheral part of the base; the base through groove is connected with the pedestal through groove in a matched mode, and the bottom end of the pedestal through groove is sleeved with the base through groove. The chamber also includes a negative electrode that is of a cylinder structure with external threads, and the upper end of the negative electrode extends into the pedestal through groove and is in threaded connection with the pedestal through groove. A highly toxic beryllium window is prevented from being used, in-situ XRD detection of the battery under different gas atmospheres is realized, and the problem of poor contact between an electrode material and a current collector is avoided; the in-situ XRD battery reaction chamber can be used for testing a two-electrode system of various batteries.

The invention provides a polyimide/graphene X-ray window film and a preparation method thereof, relates to the material testing field of X-ray application, specifically relates to an X-ray window film and a preparation method thereof, and aims to solve the problem that a beryllium window prepared by the prior art cannot be used barely in air due to toxicity and difficult to process. The polyimide/graphene X-ray window film is prepared from graphene or oxidized graphene, a diamine monomer, a dianhydride monomer and an organic solvent. The preparation method of the polyimide/graphene X-ray window film comprises the following steps of: 1, premixing to obtain a premixed solution; 2, finally mixing to obtain a colloid to be coated; 3, coating and carrying out thermal imidization treatment to obtain the polyimide/graphene X-ray window film. The preparation method provided by the invention is mainly used for preparing the polyimide/graphene X-ray window film.

The invention discloses a high-temperature and high-pressure rock core dynamic oil displacement experiment CT scanning apparatus. The apparatus comprises an apparatus shell, the apparatus shell comprises four layers, the apparatus shell is sequentially provided with an autoclave body, a heating sleeve, a heat insulation sleeve and a lead sheath from inside out, the upper end and the lower end of the autoclave body are respectively covered with an upper autoclave body end cover and a lower autoclave body end cover. Compared with traditional semiconductor X-ray detectors, the high-temperature and high-pressure rock core dynamic oil displacement experiment CT scanning apparatus adopting fluorescence paper as an X-ray receiving device realizes an experiment scheme that the receiving device is placed in high-temperature and high-pressure environment. X rays emitted by an X-ray machine permeate a beryllium window, the permeated X rays and confining pressure gas helium irradiate a rock core and form an image on the fluorescence paper to obtain a resolution image of 25 frames/second and being greater than 5 lp/mm. The emitted and received X rays do not traverse through the autoclave body shell, so avoid the influences of the autoclave body shell on the scattering and weakness of the X rays, and experiment requirements of 150 DEG C high temperature and 70 MPA are met.

The embodiment of the invention relates to an X-ray source device. The device comprises an installation base. A fixing groove is formed in the upper surface of the installation base. A vacuum chamberis arranged in the fixing groove. The vacuum chamber comprises a cylindrical cavity and a hemispherical cavity which are hermetically connected with each other. A connecting port and one or more outlet windows are formed in the circumferential direction of the cylindrical cavity. A dry pump is arranged on the upper surface of the installation base. The dry pump is connected with the connecting port of the vacuum chamber. A single-crystal monochromator is arranged in the vacuum chamber. The single-crystal monochromator comprises a double-gear linkage device, a supporting column, a single crystal and a rotary table. A driving motor is arranged in the installation base. An open type X-ray machine is arranged on the rotary table. An X-ray detector is arranged on the installation base. According to the invention, the open type X-ray machine is selected, so that the overall vacuum degree can be controlled. The situation that low-energy X rays are filtered by the beryllium window of the X-raymachine is avoided. The problem that signals cannot be collected by the detector or collected signals are weak can be solved.

The invention discloses a method for measuring a primary ray spectrum of an X-ray tube. The method comprises the following steps: placing the X-ray tube, a first aluminum plate and a detector in sequence; after the X-ray tube is arranged, a spectrogram P1 is obtained through a detector; taking away the first aluminum plate, replacing the first aluminum plate with a second aluminum plate with the thickness of D2, and retesting to obtain a spectrogram P2; according to the energy calibration coefficient of the detector, the channel numbers of the spectrogram P1 and the spectrogram P2 are converted into energy values, and a spectrogram P3 is obtained; obtaining a spectrogram P4 of the rays emitted by the X-ray tube before being absorbed by the first aluminum plate or the second aluminum plate according to the absorption of the rays by the first aluminum plate and the second aluminum plate; and according to the beryllium window of the X-ray tube and the absorption of the air to the rays, obtaining a spectrogram P5 of the rays emitted by the X-ray tube before the rays are absorbed by the beryllium window and the air. According to the measurement method, the aluminum plate is adopted as a ray attenuation medium of the X-ray tube, the measurement path is short, interference is reduced in a differential mode, the measurement accuracy is high, and use is convenient.

The invention belongs to the technical field of X-ray tube preparation, and particularly relates to a beryllium sheet packaging structure of an X-ray tube, which comprises an anode seat (1), a beryllium window mounting seat (4), a beryllium sheet (8) and a rubber sealing ring (9), wherein an X-ray outlet hole (3) penetrating through the anode seat (1) is formed in the middle in the anode seat (1),one end of the X-ray outlet hole (3) is arranged on the inclined plane side of the anode seat (1), and a circular groove (2) and a plurality of mounting holes (7) are formed in the inclined plane side; the circular groove (2) is sleeved outside the X-ray outlet hole (3), the plurality of mounting holes (7) are uniformly distributed at four corners of the circular groove (2), the middle part of the inner wall of the beryllium window mounting seat (4) is provided with a concave platform positioning surface (5), and a beryllium sheet (8) is placed in the concave platform positioning surface (5)and correspondingly arranged in the circular groove (2); the rubber sealing ring (9) is arranged in the circular groove (2); any welding operation on the beryllium sheet 8 is not needed.