51 results about "Beryllium window" patented technology

The invention relates to an electrochemical analysis in-situ cell for X-ray diffraction and a testing method. The combination of an X-ray diffractometer and a battery charging / discharging tester can be realized. The in-situ cell comprises an upper flange and a lower flange which are fixedly connected together, a cavity formed in the middle of the lower flange, a counter electrode column extending into the cavity, and a positioning device connected with the counter electrode column; a hole is formed in the middle of the upper flange; a beryllium sheet covers the hole to form a beryllium window; an electrode slice, a diaphragm and a counter electrode slice are arranged in the cavity; the upper flange is connected with an electrode lead; the counter electrode column is connected with a counter electrode lead. According to the electrochemical analysis in-situ cell, the X-beam generated by the X-ray diffractometer passes through the beryllium window to detect and analyze the crystal structure of a positive electrode material in real time, and therefore, the problem of difficult real-time detection on the change of the crystal structure in the charging and discharging process of the battery material is effectively solved; the electrochemical analysis in-situ cell is ingenious in design, simple to operate, and low in cost.

The invention discloses an X-ray diffractometer in situ battery accessory which comprises an upper top cover, a lower top cover, a center bolt, a beryllium window, a center cavity insulating part, a cathode conductive sealing part, a center electrode and a center insulator, wherein the upper end of the center bolt is mounted in a second threaded hole; the beryllium window is mounted at the bottom of the second threaded hole; the beryllium window seals the second threaded hole; the center cavity insulating part is mounted in a through hole of the center bolt; the upper end of the center cavity insulating part is in contact with the beryllium window; the cathode conductive sealing part is mounted in the inner chamber of the center cavity insulating part; the center insulator is fixedly mounted in a first through hole; the center electrode is fixedly mounted in a through hole of the center insulator; the upper end of the center electrode is connected with the cathode conductive sealing part. The device is simple in design, convenient to use, and good in air sealing property. The invention also discloses a heating device and a cooling device for the X-ray diffractometer in situ battery accessory as well as a method for measuring a lithium battery material by using the X-ray diffractometer in situ battery accessory.

An X-ray generator uses a high electrical field generated when a hemimorphic crystal is heated or cooled. The crystal may be lithium niobate polarized in one direction. An X-ray target is placed inside a housing inside which a vacuum is maintained. A tungsten line containing thorium is placed between the crystal and the target. When the crystal is heated or cooled by a Pelletier element, an intense electrical field is generated around the crystal. Thermoelectrons released from the tungsten line accelerate as a result of the electrical field and collide with the X-ray target. The X-rays released at this time radiate through a beryllium window exteriorly of the housing. Intense X-rays are generated without using large scale equipment, such as a high voltage power source.

The invention discloses a soft X-ray imaging device of a vacuum flight pipeline and belongs to the technical field of X-ray imaging. The soft X-ray imaging device comprises an X-ray tube, a sample platform, the vacuum flight pipeline and an X-ray camera, wherein coaxial through holes are machined on two opposite end faces of the vacuum flight pipeline; an incidence beryllium window and an emissionberyllium window are mounted on the two through holes respectively and are used for sealing the two through holes; the inner part of the vacuum flight pipeline has a vacuum state; the vacuum flight pipeline is located between the X-ray tube and the X-ray camera; the sample platform for fixing a sample is located between the X-ray tube and the vacuum flight pipeline; the incidence beryllium windowof the vacuum flight pipeline is clung to the sample platform; the emission beryllium window is clung to a recording surface of the X-ray camera; an X-ray emission source point of the X-ray tube, thecenter of the sample, the centers of the incidence beryllium window and the emission beryllium window and the center of the recording surface of the X-ray camera are located on the same straight line; the device can be used for carrying out soft X-ray imaging on the sample under an atmospheric environment.

The invention discloses an X-ray tube adopting a titanium window structure. The X-ray tube comprises a casing, an anode assembly and a cathode assembly, wherein the anode assembly further comprises an anode cap and an anode target assembly, and the anode target assembly is welded with the anode cap; the anode assembly further comprises a titanium window which surrounds and is welded at an exit window of the anode cap. A titanium tape is taken as the exit window of the X-ray tube, can realize equivalent inherent filtration with a beryllium window in a certain thickness, has good extensibility and welding performance and can be tightly connected with the anode cap with the large exit window, and the X-ray tube can output X rays at the large radiation angle and meets the demands of X-ray inspection equipment for the large radiation angle of rays.

An X-ray generator uses a high electrical field generated when a hemimorphic crystal is heated or cooled. The crystal may be lithium niobate polarized in one direction. An X-ray target is placed inside a housing inside which a vacuum is maintained. A tungsten line containing thorium is placed between the crystal and the target. When the crystal is heated or cooled by a Pelletier element, an intense electrical field is generated around the crystal. Thermoelectrons released from the tungsten line accelerate as a result of the electrical field and collide with the X-ray target. The X-rays released at this time radiate through a beryllium window exteriorly of the housing. Intense X-rays are generated without using large scale equipment, such as a high voltage power source.

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 a detector and method for detecting a beam position by using synchrotron radiation polarization, wherein the detector comprises a vacuum cavity (3), and two beryllium windows (4) are parallel to a synchrotron radiation light beam and are symmetrically disposed on the vacuum cavity (3). A magnetic fluid transmission mechanism (2) is connected with the vacuum cavity (3); theatmospheric end of the magnetic fluid transmission mechanism (2) is connected with a motor (7); the vacuum end of the magnetic fluid transmission mechanism (2) is connected with a clamping mechanism of a graphite single crystal wafer (1) in the vacuum cavity (3) and is used for adjusting and positioning the graphite single crystal wafer (1) to enable the graphite single crystal wafer (1) and the synchrotron radiation light beam to form a 45-degree angle or a -45-degree angle, the diffraction intensity of a linear sigma polarization component of the synchrotron radiation light beam is zero, thediffraction intensity of a pi polarization component is not zero, and the pi polarization component diffracts and is emitted to a corresponding fluorescent screen (5). A visible light sensor (6) is used for observing and recording a light-emitting image on the fluorescent screen (5).

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 a device and a method for calibrating the wavelength of an X-ray spherical curved crystal spectrometer, the device comprises a vacuum chamber, and a bicrystal, a detector, a beryllium window and an X-ray source which are arranged in the vacuum chamber, the X-ray source comprises a titanium-X-ray source and a cadmium-X-ray source, and the X-ray source is arranged between the bicrystal and the beryllium window; the bicrystal is arranged at the bottom of the vacuum chamber, one side of the vacuum chamber is communicated with a first chamber, the detector is arranged on the side, away from the vacuum chamber, of the first chamber, and the detector and the bicrystal are oppositely arranged; the vacuum chamber is provided with a high-voltage feed-through for configuring a high-voltage loop; a movement mechanism is arranged on the vacuum chamber, the X-ray source is connected with the movement mechanism, and the movement mechanism is used for controlling movement of the X-ray source so that the center of the X-ray source and the center of the bicrystal can be located at the same horizontal height. According to the invention, the X-ray source is arranged in the vacuum chamber, so that the calibration source is ensured to be static, and the intensity of the calibration spectral line is prevented from being too weak.

The invention belongs to the field of battery in-situ tests and electrochemistry, and relates to a battery for an in-situ XRD (x-ray powder diffraction) test and an assembly method of the battery. According to the battery for the in-situ XRD (x-ray powder diffraction) test and the assembly method of the battery, on the basis of the characteristics and requirements of existing battery in-situ XRD tests, the in-situ XRD test process of a battery electrode material is redesigned; carbon paper, replacing traditional metal beryllium, is adopted as a window material for the in-situ XRD test of the battery electrode material. The assembly method is applied to the in-situ XRD test of the battery electrode material so as to test products and phase change of the battery electrode material during a charging and discharging in a more inexpensive and environmentally friendly manner, so that the reaction mechanism of a battery charging and charging process can be researched. Therefore, the technicalproblems of high cost, environmental pollution and complicated assembly steps of an existing method adopts a beryllium window mold to perform an in-situ XRD test are solved.

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 discloses an in-situ battery accessory for an X-ray diffractometer, which comprises an upper top cover, a lower top cover, a central bolt, a beryllium window, a central cavity insulator, a negative electrode conductive seal, a central electrode, a central insulator, and a center bolt. The upper end is installed in the second threaded hole, the beryllium window is installed on the bottom of the second threaded hole, the beryllium window closes the second through hole, the center cavity insulator is installed in the through hole of the center bolt, and the center cavity insulator The upper end is in contact with the beryllium window, the negative electrode conductive seal is installed in the inner cavity of the central cavity insulator, the central insulator is fixedly installed on the first through hole, the central electrode is fixedly installed in the through hole of the central insulator, the upper end of the central electrode and Negative conductive seal connection. The device has the advantages of simple design, convenient use and good air sealing performance. The invention also discloses a heating device, a cooling device for the in-situ battery accessory of the X-ray diffractometer and a method for measuring lithium battery materials by using the in-situ battery accessory of the X-ray diffractometer.

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 soft X-ray tube for eliminating static electricity. The soft X-ray tube comprises a soft X-ray tube structure, the soft X-ray tube structure is provided with a beryllium window, a beryllium window supporting rod and a ceramic insulator base made of 96% alumina, wherein the beryllium window and the beryllium window supporting rod are brazed on a ceramic insulator base to form a thin circular structure, the cathode part of the soft X-ray tube structure is provided with an annular tungsten filament, a nickel electrode stem and a nickel bundling tube, and the annular tungsten filament and the nickel electrode stem are assembled together with the nickel bundling tube after spot welding. The invention has the following advantages that the soft X-ray tube is mainly usedfor eliminating static electricity, has a lower voltage (about 10Kv) than radiation tubes for other purposes, has the characteristic of simple structure, is easy to eliminate static electricity due toa large irradiation angle (more than 130 degrees), is easier to combine with a heatproof device, and can be mounted in a narrow space due to a small overall size.

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 embodiment of the invention provides a beryllium window assembly welding device and method. The beryllium window assembly welding device comprises a laser device, a controller, an incident light module, a galvanometer scanning module, an emergent light module, a sealing box and a workbench. A fixing clamp is arranged on the table top of the workbench, the workbench is arranged in the sealing box, and the part, corresponding to the fixing clamp, of the sealing box is arranged in a light-transmitting mode. The laser device, the incident light module, the galvanometer scanning module, the emergent light module and the fixing clamp are sequentially arranged on an optical axis of the beryllium window assembly welding device. The incident light module is used for adjusting laser emitted to the galvanometer scanning module. The emergent light module is used for converging the laser emitted to the fixing clamp. The controller is electrically connected with the laser device and the galvanometer scanning module. A beryllium window assembly is placed in the sealing box after being fixed through the fixing clamp, laser precision welding is conducted through the galvanometer scanning modulealong the preset welding track, and the device is simple in structure, convenient to use, capable of conveniently drawing the welding track and good in welding quality.

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 invention relates to a packaging method suitable for an outer space detector beryllium window. The packaging method comprises the following steps: S1, weighing a compound A and a compound B of 2216Gray epoxy resin glue according to the mass ratio of (1-3): 1 for standby use; S2, putting the compound A and the compound B weighed in the step S1 in a vacuum environment with the vacuum degree of smaller than 100 Pa for mixing, stirring uniformly until no bubble exists on the surface of the glue, and then charging pure nitrogen in the vacuum environment until the environment is at one standard atmospheric pressure for standby use; S3, uniformly coating the epoxy resin mixture obtained in the step S2 on the sealing surface of the beryllium window, and then pressing a beryllium plate on the sealing surface; and S4, carrying out heating curing on the beryllium window in the step S3, wherein the heating temperature is 90-100 DEG C, and the heating time is 0.5-1.5 h. The beryllium window packaging method solves the defect that the outgassing rate of the beryllium window packaged by the beryllium window packaging method in the prior art is high.

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 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.