46 results about "Energy dispersion" patented technology

The invention discloses a MeV-level wide-energy-spectrum gamma energy selection amplification imaging system and a design method thereof. The technical problem that an existing gamma ray beam energy selection imaging device is low in detection efficiency is solved. The imaging system comprises a radiation conversion unit, an energy selection beam amplification unit and an imaging unit, the radiation conversion unit is a radiation conversion target and is used for converting gamma rays from a to-be-detected target into electron beams; the energy selection beam amplification unit comprises a collimator, a first magnet and a second magnet which are sequentially arranged along the transmission path of the electron beam; the collimator is used for limiting the collection angle of the electron beam; the parameter specifications of the first magnet and the second magnet are different, the first magnet and the second magnet are respectively used for changing a transmission path of an electron beam through a magnetic field, and a first beam limiting device is arranged between the first magnet and the second magnet and is used for removing electrons which can be dispersed in the y direction and are large in angle; and a second beam limiting device is arranged between the imaging unit and the second magnet and is used for removing electrons which can be dispersed in the x direction and have large angles.

The invention discloses a high-flux electron beam quality cooperative control system and method, belongs to the technical field of electron beam control, and aims to solve the problems that the beam intensity and quality are difficult to consider, the subsystem collaboration is poor and the stability is insufficient. The cooperative control module is in communication connection with the sensing module and is used for receiving the state parameters, analyzing the state parameters based on a preset multi-target optimization algorithm and generating a cooperative control instruction, and the execution module is in communication connection with the cooperative control module and is used for receiving the cooperative control instruction and executing the cooperative control instruction according to the cooperative control instruction. Cooperative control of beam intensity and quality is realized. Through a multi-objective optimization algorithm, the limitation of traditional single parameter control is broken through, the beam intensity is larger than or equal to 100 mA, the emittance is smaller than or equal to 5 pi mm mrad and the energy dispersion is smaller than or equal to 0.5% can be achieved at the same time, and the technical problem that the beam intensity and the emittance are difficult to consider is solved.

The invention belongs to the technical field of petroleum and natural gas mineral geochemical experiment research, and discloses a research method for a mechanism of extracting elemental gold in hydrothermal fluid from crude oil. In-situ visualization experiments are carried out in a transparent fused quartz capillary tube, and analysis is carried out in combination with a scanning electron microscope, an energy dispersion X-ray spectrum and a transmission electron microscope, so that continuous evolution of water droplets near an interface of oil and a solution containing HAuCl4 at a high temperature is successfully proved. According to the method disclosed by the invention, hydration electrons released in a conversion process from OH <-> to OH < * > in the water droplets are extracted, the hydration electrons and H2O2 formed in the droplets have a synergistic effect, Au3 < + > is promoted to be reduced to form natural gold atoms, the atoms are gathered into nano-scale and micron-scale gold particles in a droplet coalescence process, and a clear and reasonable mechanism is provided for formation of elemental gold in crude oil extraction hydrothermal fluid.

The invention relates to the technical field of spectral measurement and analysis, and discloses an in-situ cell for rapid and continuous synchrotron radiation X-ray absorption spectrum measurement, the in-situ cell comprises a housing 1, one side of the housing 1 is provided with two through holes, and a counter electrode and a reference electrode are respectively fixed in the two through holes; the first shell and the second shell are correspondingly arranged, and square optical windows are arranged in the center of the second shell and the center of the first shell; the first shell and the second shell are each provided with a hole channel, the two hole channels are located on the two sides of the square optical window respectively, and a working electrode is fixedly arranged between the second shell and the first shell. The in-situ synchrotron radiation X-ray absorption spectrum measuring device is suitable for in-situ synchrotron radiation X-ray absorption spectrum measurement in a time-resolved energy dispersion / transmission mode, and through real-time supply and circular flow of the electrolyte on the surface of the working electrode, the uniformity of the X-ray penetrating through a solution layer is ensured, the elimination of product gas is accelerated, the influence of solution disturbance on a test signal is reduced, and the test stability is improved.

The invention provides a standing wave acceleration structure and an acceleration device. The standing wave acceleration structure comprises a light velocity section and a bunching section. The light velocity section comprises a plurality of light velocity cavities which are distributed in the axial direction of the light velocity section and are sequentially communicated. The bunching section comprises a bunching cavity and an entrance port, the bunching section is arranged at the upstream of the light velocity section along the electron beam direction, the entrance port is communicated with the bunching cavity, and the bunching cavity is communicated with the light velocity cavity at the most upstream. Wherein an accelerating electric field in the axial direction of the light velocity section is formed in the light velocity cavity, the phase of electrons entering the light velocity cavity is ahead of the maximum accelerating phase of the accelerating electric field, and the phase of the electrons after acceleration does not exceed the phase corresponding to the maximum value of the electric field intensity of the accelerating electric field. According to the acceleration structure provided by the embodiment of the invention, the energy dispersion of the electron beam can be reduced by adopting a sliding phase method, so that a smaller focus size can be obtained during subsequent quadrupole magnet focusing, the spatial resolution of the acceleration device is improved, and a better effect is achieved during fine defect detection.

The invention discloses a 10 MeV-level high-brightness ultrafast electron beam source based on quasi-linear laser wake field acceleration and a generation device thereof. Miniaturized repetition frequency ten-megawatt-level femtosecond laser interacts with a gas target capable of generating special gas flow distribution; based on a new quasi-linear laser wake field electron acceleration mechanism, the generation of a 10 MeV-level high-brightness high-performance ultrafast electron beam source can be accelerated. The device effectively solves the problem that it is difficult to accelerate generation of ultrafast electron beams with low energy dispersion, low emittance, high flow intensity, femtosecond pulse width, high brightness and high performance in a sub-ten-megawatt femtosecond laser driving wake field. Therefore, the method is expected to be widely applied to advanced fields such as ultrafast electron diffraction imaging and pumping detection, laser wake field and plasma diagnosis and measurement, high-energy particle acceleration, novel ultrafast coherent radiation source generation and the like.

The invention provides an improved camera for electron diffraction pattern analysis, and particularly relates to a device for detecting a Kikuchi diffraction pattern. The apparatus comprises: an electron column adapted to provide, in use, an electron beam directed toward the sample, the electron beam having an energy in the range of 2 keV to 50 keV, and; an imaging detector for receiving and counting electrons from the sample due to the interaction of the electron beam with the sample, the detector comprising an array of pixels and having a count rate capability of at least 2000 electrons per second for each pixel wherein: the imaging detector is adapted to provide electron energy filtering of the received electrons, the particle detector has an active region and a diffraction pattern for counting received electrons representing said diffraction pattern, and the particle detector has an inert layer on a surface on which electrons enter towards the active region of the detector, where the inert layer disperses the detection energy of 20 keV incident electrons having an energy dispersion of a full width at half maximum of less than 3.2 keV. The invention also provides a method for detecting the Kikuchi diffraction pattern.

In order to provide a charged particle beam device capable of returning to a usable state in a short time after completion of flushing processing for continuously and stably using an electron beam having a high luminance and a low energy dispersion and capable of shortening the downtime of the device, the charged particle beam device is configured as follows.　The charged particle beam device comprises: an electron source that emits electrons; an extraction electrode that faces the electron source and generates an electric field for causing the electron source to emit electrons; a first voltage power supply that applies a first voltage to the electron source in order to emit electrons from the electron source; a second voltage power supply that applies a second voltage to the extraction electrode; and a cooling device that cools the electron source. The charged particle beam device further comprises: a third voltage power supply that, in order to remove gas molecules adsorbed onto the electron source in the process of a specimen inspection, applies a third voltage having a polarity opposite to that of the first voltage to the electron source and thereby can set an electric field generated between the electron source and the extraction electrode such that the electron source is positive and the extraction electrode is negative; and a control unit for performing control so as to stop applying the first voltage from the first voltage power supply when applying the third voltage from the third voltage power supply to the electron source.

With a multi-electron beam system in which hundreds of beamlets are formed, it is possible to focus and converge these beamlets, reduce the effect of Coulomb interaction, and improve the resolution of these beamlets. By means of the electrostatic and magnetic deflection fields of a Wien filter, it is possible to separate the secondary electron beam from the primary electron beam and simultaneously correct the spherical aberration and source energy dispersion blur for all beamlets.

A multi-electron beam system that forms hundreds of beamlets can focus the beamlets, reduce Coulomb interaction effects, and improve the resolution of the beamlets. A Wien filter with electrostatic and magnetic deflection fields can separate the secondary electron beam from the primary electron beam and can correct for astigmatism and source energy dispersion blur for all the beamlets simultaneously.

A method for determining the tungsten and molybdenum content in a high-tungsten and low-molybdenum solution by using an energy dispersive X-ray fluorescence analyzer, 1) preparing multiple standard samples for determining the WO3 curve; 2) using a colorimetric method to determine the WO3 and Mo values ​​of each sample in step 1); 3) preparing multiple standard samples for determining the Mo curve; 4) using a colorimetric method to determine the WO3 and Mo values ​​of each sample in step 3); 5) using an energy spectrometer to determine the working curve of WO3 in the high-tungsten and low-molybdenum solution; 6) using an energy spectrometer to determine the working curve of Mo in the high-tungsten and low-molybdenum solution; 7) a correction coefficient working curve; 8) determining the sample to be tested, obtaining the correction coefficient of the sample Mo and calculating the Mo content. The method solves the problem of inaccurate determination of the molybdenum content in the high-tungsten and low-molybdenum solution by an energy dispersive X-ray fluorescence analyzer, is simple to operate, has accurate measurement data, saves analysis time, and avoids environmental pollution.

The application discloses a high-efficiency double-light-path method of an energy dispersion X fluorescence spectrometer, which is characterized by the following steps: arranging multiple light path modules, one of which is in a fixed mode, and the others of which can adjust the displacement amount by moving the module, and optimizing the configuration of integrated light gates, collimation, filter switching components and light path accessories; and according to different specifications and sizes of samples, the test unit adjusts the displacement amount of the movable light path according to an algorithm to realize high efficiency and high performance, thereby meeting the test requirements of different products and simultaneously meeting the accuracy and efficiency requirements of the test process.

The invention discloses an X-ray residual stress testing device and method based on an energy dispersion type, and belongs to the technical field of X-ray stress testing. The testing device comprises an X-ray source, a first incident collimator, a second incident collimator, a sample table, a first diffraction collimator, a second diffraction collimator and an X-ray detector which are sequentially arranged along a light path, wherein the first incident collimator and the second incident collimator are arranged in parallel, and the first diffraction collimator and the second diffraction collimator are arranged in parallel; and an X-ray diffraction angle theta is formed between the sample table and the first diffraction collimator. According to the testing device and method provided by the invention, the rapid and nondestructive measurement of the internal residual stress of the material and the component is realized through the micro-focusing composite X light source, the confocal light path and the solid-state detector technology.

The present technology relates to an oxide thin film. An oxide thin film according to the present technology comprises: a single crystal substrate; the present invention relates to a thin film transistor including a single crystal substrate, and a main oxide layer laminated on the single crystal substrate and doped with a dissimilar metal element, the dissimilar metal element and a metal element of a metal oxide constituting the main oxide layer being capable of being uniformly distributed in energy-dispersive X-ray analysis (EDX) using a transmission electron microscope (TEM). The present technology can provide an oxide thin film exhibiting MIT characteristics with improved reliability, sensitivity, accuracy, and reproducibility.

The invention discloses a microdefect identification method for a molecular beam epitaxy tellurium-cadmium-mercury film. The method comprises the following steps: providing the molecular beam epitaxy tellurium-cadmium-mercury film; removing a surface oxide layer by chemical corrosion; corroding the thin film based on a defect-sensitive oxidizing corrosive agent to obtain defect distribution (corresponding to corrosion pit distribution) in the tellurium-cadmium-mercury thin film; cutting and thinning the corrosion pit area by using a focused ion beam; a defect atomic image arrangement structure in the corrosion pit is observed through a transmission electron microscope, and typical dislocation and stacking fault atomic arrangement structures are distinguished; a specific area is tested through an X-ray energy dispersion spectrometer, and element distribution states of different defect areas are identified. The method directly reflects the structure, distribution and origin of the microdefects in the molecular beam epitaxy tellurium-cadmium-mercury thin film, and has great application value in the aspects of inhibiting tellurium-cadmium-mercury defects, improving the quality of the molecular beam epitaxy tellurium-cadmium-mercury crystal and the like.

1. The name of the design product: Spectrometer shell (606 type). 2. The use of the design product: The shell for energy dispersion x fluorescence spectrometer. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The invention belongs to the technical field of traditional Chinese medicine identification, and provides an energy dispersion type X-ray fluorescence spectrometry-based dragon bone authenticity identification method, which comprises the following steps of: detecting a dragon bone sample to be detected by adopting an energy dispersion X-ray spectrometer, and calculating element composition and content in the detected sample by adopting a standard-sample-free basic parameter method; taking the occurrence characteristics of the U element as fingerprint characteristics for identifying the authenticity of the keel, if the EDX does not detect the U element, preliminarily judging that the to-be-detected keel sample is a counterfeit product, and if the U element is detected, preliminarily judging that the to-be-detected keel sample is a genuine product; and the determination result is further supported by combining the SrO content. The identification method disclosed by the invention is simple and convenient to operate, efficient and accurate, realizes nondestructive detection, and is particularly suitable for identifying precious medicinal materials.

The invention discloses a characterization method for a nano structure of an X-ray photoetching grayscale mask, and relates to the technical field of micro-nano processing. The method comprises the following steps: before preparing a focused ion beam cross section, sequentially depositing a multi-layer composite protective film on the surface of a to-be-detected X-ray photoetching gray scale mask nanostructure, and sequentially comprising a first carbon layer, a first tungsten layer, a second carbon layer and a second tungsten layer from bottom to top; according to the structure, pollution of the tungsten layer is isolated through the carbon layer, the purity of interface component analysis is ensured, meanwhile, mechanical support and ion sputtering resistance are provided through the tungsten layer, the original three-dimensional shape of the nanostructure is protected, finally, focused ion beam cutting is carried out, and detection and analysis are carried out through a scanning electron microscope-energy dispersion X-ray spectrometer. Accurate characterization of the depth, the side wall morphology and the elemental components of the X-ray photoetching grayscale mask nanostructure is realized.

The invention relates to a method for testing the content of free mica in machine-made sandstone powder, which comprises the following steps: pre-treating machine-made sand, and plating a carbon layer on the surface of a pre-treated sample; performing grating type point-by-point scanning on the surface of the prepared sample to generate and obtain a high-resolution back scattering image; calculating the area of stone powder particles according to the back scattering image, and calculating the area of a mica particle region to obtain the content of free mica in the stone powder; performing EDS scanning on the range of the free mica particles to obtain an X-ray spectrum, and analyzing the X-ray spectrum through software to generate a multicolor layered element diagram; and combining the element diagrams to generate a multicolor layered energy dispersion spectrum element diagram, calculating the area of a corresponding region according to the monochromatic energy dispersion spectrum diagram of the potassium element, calculating the area of a corresponding region according to the monochromatic energy dispersion spectrum diagram of the magnesium element, and further calculating the content of free muscovite and the content of other free mica.

An object of the present disclosure is to provide a noble metal vapor deposition material for use in a vacuum vapor deposition method capable of suppressing the occurrence of the bumping phenomenon during vacuum vapor deposition. Provided is a vapor deposition material composed of a noble metal, wherein, when a surface area of 50 μm×50 μm of the vapor deposition material is analyzed using energy dispersive X-ray spectroscopy, Fe is less than 10 wt %, and when analysis is performed using ICP atomic emission spectroscopy, Fe is 10 wtppm or less.

The present invention relates to a toner. A toner includes toner particles, the toner particles including: a core particle containing a resin component, a shell covering the surface of the core particle, and a polyvalent metal. The resin component contains a polyester resin, and the shell contains an amino resin; in an electron image of a cross section of the toner taken using a transmission electron microscope, the content P(M) of the polyvalent metal obtained at and near the core / shell interface by energy dispersive X-ray analysis is 0.0010 to 2.00 atomic %; and according to nanoindentation measurement of the toner, the surface storage elastic modulus of the toner at 25°C under a load of 30 μN is 6.50 GPa to 12.00 GPa.

The application discloses a kind of MIMO multi-view radar correlation imaging method, device and medium based on image entropy, for the new problem that radar correlation imaging unit scattering intensity fluctuation with uncertainty of view angle causes radar echo and corresponding imaging unit reference signal correlation mismatch, using the strategy of "result-oriented", from the energy dispersion of imaging unit, based on the sparse reconstruction of imaging scene, join image entropy to construct new optimization model, and using soft threshold iterative shrinkage algorithm to solve the optimization model, obtain the multi-view MIMO radar correlation imaging result of high resolution.The application increases the number of imaging channels, expands the observation angle, increases the randomness of radiation field, and can achieve high-precision imaging under the condition of unit scattering intensity fluctuation.

The invention discloses an ECMO pipeline blood flow state monitoring method and system based on video analysis, and belongs to the technical field of medical monitoring. The method comprises the following steps: acquiring a video stream of an ECMO pipeline, dynamically positioning the center of the pipeline, and extracting a one-dimensional average gray scale time sequence signal; calculating a dynamic baseline for the time sequence signal, and extracting a normalized waveform event segment; an optical polarity index and a normalized energy dispersion index of the waveform event segment are calculated, the optical polarity index represents a positive and negative energy distribution difference, and the normalized energy dispersion index represents an energy concentration or dispersion form; and finally, constructing a feature vector based on the optical polarity index and the normalized energy dispersion index, and discriminating bubbles by using a classifier to realize monitoring. According to the invention, the dependence on signal absolute intensity is abandoned, and the accuracy and reliability of bubble monitoring in a complex clinical environment are obviously improved.

An image generation device according to the present invention comprises a Wien filter (108) that has a multipole structure, an operation control unit (150) that applies the same voltage to all of the poles while causing an electric field and a magnetic field that satisfy Wien conditions to be formed at the Wien filter to cause an axisymmetric lens field to be formed at the Wien filter, a lower shaft (120) that is provided below the Wien filter (108) and has a through hole (123), and an electron detector (107) that detects at least secondary electrons that have a prescribed energy from among secondary electrons dispersed by the Wien filter (108) according to energy.

The invention relates to the technical field of core homing research, and particularly discloses a shale core homing method. The method comprises the following steps: accurately analyzing an Al element in a rock core sample through an energy dispersion X-ray fluorescence spectrophotometer, combining the Al element and a natural gamma logging curve by utilizing the obvious positive correlation between the Al element and the natural gamma logging curve, and gradually adjusting the marking depth of the rock core to obtain the target value of the rock core. The homing result is optimized by utilizing the correlation between the Al element content change and the natural gamma logging curve, the influence of human subjective factors is reduced in the process, the homing accuracy and consistency are ensured, the operation process is simplified, the homing process cost is reduced, the defects in the prior art are effectively overcome through the technical scheme, and the homing efficiency is improved. And a more reliable technical support is provided for accurate exploration of shale resources.

This cemented carbide is provided with a plurality of multiple tungsten carbide particles and a binding phase. The cemented carbide contains a total of 80 vol% or more of the tungsten carbide particles and the binding phase. The cemented carbide contains 0.1-20 vol% of the binding phase. The cemented carbide contains one or more first elements selected from the group consisting of titanium, tantalum, niobium, zirconium, cerium, yttrium, and boron. The cemented carbide contains a total of 0.01-20 at% of the first elements. The binding phase contains 50 mass% or more of cobalt. In a first graph indicating, in a coordinate system in which the X-axis represents the distance from a position at which cobalt exhibits the maximum intensity and the Y-axis represents the standardized intensity, the result obtained through a line analysis performed in a first direction from the binding phase to an adjacent one of the tungsten carbide particles by using an energy dispersion type X-ray spectroscopy device that is accessory to a transmission electron microscope, the maximum peak M of each of the first elements exists between a peak W1 of tungsten located closest to the point of origin and another peak W2 of tungsten located closest to the peak W1, and the ratio IB / IA of an intensity IB with respect to the maximum peak intensity IA of the maximum peak M for each of the first elements is 0.5 or less, where the intensity IB is the intensity of the first element at a distance P2 which is 0.2 nm beyond a distance P1 of the maximum peak intensity IA toward the opposite side with respect to the point of origin.

The invention provides a device and method for measuring beam energy dispersion distribution by using laser, and the device comprises a central housing, the central housing comprises a closed central housing body, the left side wall of the central housing body is provided with an electron inlet, the right side wall of the central housing body is provided with a photon inlet, and the inner side wall of the central housing body is also provided with a plurality of detectors. The left side of the center shell body is further provided with an electronic movement channel in the transverse direction, and the right end of the electronic movement channel is connected with the left side wall of the center shell body and internally communicated with the center shell body. The right side of the center shell body is further provided with a photon movement channel, the photon movement channel and the electron movement channel are coaxially arranged, and the left end of the photon movement channel is connected with the center shell body and internally communicated with the center shell body. The photon motion channel is coaxially sleeved with a shielding cover, and an electron shunting field is arranged in the shielding cover. The laser and the electron beam are collided, result particles are measured and collected, initial collision conditions are deduced reversely, and fine indexes of energy dispersion of the to-be-measured beam emitter are obtained.

1. The name of the design product: Spectrometer housing (616 type). 2. The use of the design product: The housing for energy dispersion x fluorescence spectrometer. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

1. The name of the product of this design: Energy Dispersive X-ray Fluorescence Spectrometer (FL5). 2. Purpose of the product of this design: to obtain X-ray spectra. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The application relates to a material testing method based on an energy dispersion X-ray spectrometer, and an electronic device, the testing method sets different fitting calculation peak strengths and peak positions for single-peak, overlapping-peak and light-element-dominant peaks, and cooperates with a quantitative calculation method of a peak area-sensitivity factor method, so that the success rate of material analysis and the analysis result accuracy can be effectively improved; by extracting EDX energy spectrum diagrams to perform characteristic analysis on peak fitting degrees, signal-to-noise ratios, energy intervals and total peak numbers, a random forest classifier is used to perform classification analysis on input characteristics to output energy spectrum type labels, and then corresponding algorithms in an algorithm library are automatically matched, the reproducibility of material analysis results is improved, batch processing is supported, 1000+ samples per day can be analyzed, and the testing results are reliable, accurate, and have good reproducibility.