13 results about "Electron motion" patented technology

The invention provides a single / double-module energy-adjustable superconducting electron accelerator device, a medical isotope production system and a medical isotope production method, and the device comprises an injection system which is used for generating an electron beam current with certain energy and current intensity; the acceleration module system comprises single or double parallel acceleration modules, and each acceleration module comprises a superconducting cavity and a low-temperature unit; the low-temperature unit comprises a refrigerator, a high-thermal-conductivity cold chain, and a cold shield and a vacuum shell which sequentially cover the periphery; the radio frequency system is used for feeding microwave power into the superconducting cavity, maintaining the amplitude and phase stability of an electromagnetic field and accurately compensating the frequency deviation of the superconducting cavity; and the electron motion trail control system is used for guiding the electron beam to pass through the acceleration module and the plurality of circulating transmission pipelines with the corner radiuses sequentially enlarged for multiple times. The technical problems that an existing accelerator is limited by serious heating and cannot achieve high-flow-intensity and high-energy operation, a low-temperature cooling system is complex, so that the operation and maintenance cost is high, high energy and high flow intensity cannot be considered at the same time, and medical isotope production is difficult to meet are solved.

The invention provides a single-module double-cavity parallel superconducting electron accelerator device, a medical isotope production system and a medical isotope production method, and the device comprises an injection system which is used for generating an electron beam current with certain energy and current intensity; the acceleration module system comprises a low-temperature unit and a superconducting cavity; the low-temperature unit comprises a refrigerator, a high-thermal-conductivity cold chain, and a cold shield and a vacuum shell which sequentially cover the periphery; the refrigerating machine is connected with the superconducting cavity through a high-thermal-conductivity cold chain; the radio frequency system is used for feeding microwave power into each superconducting cavity, maintaining the amplitude and phase stability of an electromagnetic field and accurately compensating the frequency deviation of the superconducting cavity; and the electronic motion trail control system is used for guiding the electronic beam current to pass through the double parallel superconducting cavities and a plurality of circulating transmission pipelines of which the corner radiuses are sequentially enlarged for multiple times. The technical problems that an existing accelerator is limited by serious heating and cannot achieve high-flow-intensity and high-energy operation, a low-temperature cooling system is complex, so that the operation and maintenance cost is high, high energy and high flow intensity cannot be considered at the same time, and medical isotope production is difficult to meet are solved.

The invention provides an analysis method and system for electron re-collision energy in a non-uniform laser field, and the method comprises the steps: obtaining a field intensity peak value and a space gradient as input parameters, constructing an electron motion equation frame based on a classical re-collision theory, solving and calculating return kinetic energy through employing a perturbation method, calculating output characteristics based on energy-momentum conservation, and obtaining an electron re-collision energy model. The method comprises the steps of obtaining multiple groups of data by repeating more than multiple rounds of operation so as to construct a sample database, and constructing a physical heuristic deep mapping network based on the sample database so as to obtain corrected output characteristics. An efficient physical approximation model is constructed by introducing a perturbation method, and a physical heuristic deep mapping network of physical constraints is constructed according to the efficient physical approximation model, so that a novel analysis method with both physical consistency and calculation efficiency is constructed.

The application discloses a high-efficiency traveling wave tube focusing magnetic field fast optimization method under dynamic input, and belongs to the field of microwave vacuum electron technology.The method firstly constructs a high-frequency structure model in an electromagnetic simulation software, imports an initial PCM magnetic field to perform PIC simulation to obtain electron trajectories and an initial current distribution;then, the electron trajectories are simulated in combination with a three-dimensional electron motion and a space charge force equation, y-direction projection is taken, the outermost two trajectories are selected, and an optimized PCM magnetic field is obtained through an optimization algorithm iteration; subsequently, the magnetic field is imported to perform PIC simulation to obtain a new current distribution, and after convergence is judged, the iteration optimization is repeated, and finally, an optimal PCM magnetic field is obtained.The application realizes accurate optimization of the magnetic field under dynamic signal input, greatly shortens the magnetic system optimization period, effectively reduces the intercepted current, improves the electron flow rate, and guarantees the output power of the traveling wave tube and the overall tube efficiency.

The invention belongs to the technical field of electronic orbital analysis and calculation, and particularly relates to a method for calculating an electronic orbital and an energy state in atoms. The method comprises the following steps: firstly, constructing an electron kinetic equation, namely external force borne by electrons, electron mass, acceleration of the electrons, internal force of the electrons, and displacement representing an electron center position deviating from inertial motion, and finally obtaining an electron motion equation as shown in the specification; by solving the motion equation, orbits and energy levels of electrons in atoms, structures and energy states of molecules and physicochemical properties of semiconductor materials can be calculated. According to the method, hydrogen atoms are taken as an example, and the motion trail and the electron track of electrons in the hydrogen atoms are calculated and described. The method can be expanded to analysis and research of energy states of electrons in molecules or crystals or vacuum and physicochemical properties of materials.

The invention discloses an electron two-dimensional spin detector and application thereof. The electron two-dimensional spin detector comprises a high-transmittance metal net, an electron spin screening film, an electron multiplier and an electron detector which are sequentially arranged in the electron movement direction. Magnetizing devices are arranged around the electron spin screening film in the circumferential direction in an array mode, and positive and negative polarization in multiple directions is achieved. The high-transmittance metal net, the electron spin screening film and the electron multiplier are respectively connected with a voltage source, the voltage is changed, and the voltage difference between the high-transmittance metal net and the electron spin screening film is changed. The electron two-dimensional spin detector designed by the invention is simple in structure, does not need a complex process of coating or surface treatment, can directly detect two-dimensional spin electrons, can be combined with a hemispherical energy analyzer, a time-flight electron energy analyzer and other electron energy analyzers, and meets more measurement scenes.

A non-contact contact detection method and system based on X-ray energy spectrum characteristics includes: Step 1, acquiring point cloud data of the contact surface and establishing a feature vector of contact surface defects; Step 2, constructing a field emission model based on the feature vector in Step 1; Step 3, solving for the electron trajectory using a multiphysics coupling method based on the model in Step 2; Step 4, modeling the X-ray radiation characteristics using a Monte Carlo simulation method based on the electron trajectory in Step 3 to obtain the X-ray energy spectrum distribution; Step 5, extracting feature parameters based on the X-ray energy spectrum distribution obtained in Step 4 to construct an energy spectrum feature vector; Step 6, performing contact surface state inversion and quantitative evaluation based on the energy spectrum feature vector in Step 5, thereby achieving non-contact quantitative detection of contact defects. This invention accurately reflects the influence of the contact surface on local electric field enhancement and field emission behavior, improving the accuracy and physical interpretability of the detection results.

The utility model relates to a micro-focus X-ray device, which belongs to the technical field of X-rays and solves the problem of low resolution of CT (computed tomography) images caused by oval effective focuses of X-rays generated in the prior art. The micro-focus X-ray device comprises an electron beam generator, a focusing assembly, a lens assembly and a target, the electron beam generator is used for emitting electron beams, and the focusing assembly, the lens assembly and the target are all arranged on one side of the emitting end of the electron beam generator and are sequentially arranged in the electron movement direction of the electron beams; the lens assembly comprises two electron optical lenses, the two electron optical lenses are sequentially arranged in the electron movement direction, polar plates of the two electron optical lenses are aligned in the electron movement direction, and the polarities of the two aligned polar plates are opposite. The effective focus of the micro-focus X-ray generated by the micro-focus X-ray device is closer to a circle, so that the resolution of a CT (computed tomography) image can be improved.

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.

The invention provides a module serial type superconducting electron accelerator device, a medical isotope production system and a medical isotope production method, and the device comprises an injection system which is used for generating an electron beam current with certain energy and current intensity; the acceleration module system is composed of a plurality of acceleration modules which are connected in series; the acceleration module comprises a superconducting cavity which is provided with acceleration units connected in series, and two ends of the superconducting cavity are beam pipelines; the low-temperature unit comprises a plurality of refrigerators, a high-thermal-conductivity cold chain, and a cold shield and a vacuum shell which sequentially cover the cold ends of the refrigerators and the superconducting cavity; the refrigerator connects a cold head to the outer surface of the superconducting cavity through a high-thermal-conductivity cold chain; the radio frequency system is used for feeding microwave power into each superconducting cavity, maintaining the amplitude and phase stability of an electromagnetic field and accurately compensating the frequency deviation of the superconducting cavity; and the electronic motion trail control system is used for guiding an electronic beam trail and monitoring beam parameters. The technical problems that an existing accelerator is difficult to meet the requirement for efficient and low-cost acceleration of high-energy electron beams and cannot adapt to medical isotope production are solved.

The application relates to a charged particle beam fixed-point and surface covering delivery method, device, equipment and medium. By constructing a high-energy electron emitter running track, the initial running track height of the high-energy electron is determined; the high-energy electron motion track is determined based on Larmor rotation, reciprocal rebound motion between mirror points of the geomagnetic field and drift motion along the geomagnetic meridian to construct a fixed-point delivery strategy and a surface covering delivery strategy; the outer boundary constraint of the track running of the fixed-point delivery and the inner boundary constraint of the track running of the fixed-point delivery are determined, the high-energy electron emitter runs according to the track, and the high-energy electron beam is emitted based on the fixed-point delivery strategy; the outer boundary constraint of the track running of the surface covering delivery and the inner boundary constraint of the track running of the surface covering delivery are determined, the high-energy electron emitter runs according to the track, and the high-energy electron beam is continuously emitted based on the surface covering delivery strategy; the application can realize rapid and fixed-time delivery to a certain point in space and has the capability of single-ellipsoid surface covering delivery and multi-ellipsoid surface covering delivery.

The invention belongs to the technical field of pressure detection, and particularly relates to a pressure sensor based on electron emission, and the pressure sensor comprises a vacuum chamber which is composed of a bottom plate, an elastic supporting cylinder fixed on the bottom plate, and an electron reflection polar plate fixed at the top end of the elastic supporting cylinder, and is kept sealed; the electron emission and collection assembly is fixedly arranged on the bottom plate and located in the vacuum cavity and comprises a cathode used for emitting electrons, a first anode and a second anode, and the first anode and the second anode are arranged in a spaced mode, coaxial with the cathode and used for collecting the electrons. By detecting the current difference or ratio of the first anode and the second anode, the external pressure causing the displacement of the electron reflection polar plate can be calculated with high sensitivity. The detection mechanism is essentially spatial modulation and differential measurement on an electron movement track, and does not directly depend on the intensity of an inter-electrode electric field.

The invention provides a method, a system and equipment for measuring three-dimensional structure characteristics, which are applied to a characteristic size scanning electron microscope (CDSEM), and mainly comprise: the CDSEM comprises at least two electron guns; the at least two electron guns are arranged opposite to the to-be-detected structure, and meanwhile the distances from the electron beam emitting ends of the at least two electron guns to the to-be-detected structure are the same; enabling the at least two electron guns to emit electron beams along respective corresponding electron motion paths to scan the to-be-detected structure, and generating at least two two-dimensional scanning images; combining the at least two two-dimensional scanning images according to the electron motion paths corresponding to the at least two electron guns, and generating a total contour image of the to-be-detected structure; and extracting three-dimensional structure features of the to-be-detected structure according to the multiple pieces of feature size information. The at least two electron guns are adopted to scan the to-be-detected structure from different angles, the richness of the obtained image data can be improved, and then the accuracy of measuring the three-dimensional structure characteristics of the to-be-detected structure is improved.