414 results about "Beam energy" patented technology

The invention discloses a beam current testing device for accelerator beam current debugging, which comprises an integrated short-distance testing device without a focusing or deflecting magnet, and is characterized in that the testing device comprises a vacuum chamber, and at least two beam current position detectors are integrated on the vacuum chamber along the beam current ejection direction of an accelerator; the two beam position detectors connected with the vacuum chamber are symmetrically arranged on the two sides of the vacuum chamber, and the center distance is adjustable; the vacuum pipeline where the beam position detector is located is coaxially provided with a flow intensity measuring device and a beam garbage target, and the flow intensity measuring device is provided with an insulation sealing structure for preventing generation of mirror current; and a vacuumizing device is also integrated on the vacuum chamber. The testing device is not provided with any magnet, does not focus or deflect the beam current, is simple in structure, achieves the measurement of the beam current intensity, beam current energy and beam spot size through the simplest structure, is small in installation space, meets the requirements of ACCT current intensity measurement for isolating mirror current, and can be flexibly installed according to the needs.

This application presents ideas for devices that solve energy generation problems and space exploration. This application show idea that is using device such using conductor / element or device. And this application show idea that is using device such using conductive line or carrier device. This application show idea that is using device such using photon or particle related device.

An apparatus, system and method are disclosed for two-dimensional (2D) and three-dimensional (3D) imaging including ultrasonic imaging and treatment of tissue micropathology within a body. An apparatus may include two or more arrays of ultrasonic transducers with a volume of tissue or other region or object between the arrays. Groups of elements in the first array are pulsed together, with the pulses time-delayed (phased) to create ultrasonic or electric beam patterns that focus the beam energy through the tissue, region or object onto individual elements of the second array. Computed tomography (CT) techniques process the signals to reconstruct a 2D or 3D structure. Micropathology within a tissue may be treated by transmitting pulses from both arrays, by pulsing groups of elements together, and / or by phasing the pulses to focus on and ablate the region of micropathology.

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 an electron linear accelerator for radiotherapy equipment in an X-ray operation. The microwave power source sequentially passes through the circulator and the power divider and then is connected with the first coupler and the second coupler, the first coupler is connected with the first acceleration cavity to provide an independent microwave magnetic field, and the second coupler is connected with the second acceleration cavity to provide an independent microwave magnetic field. An electron gun of the electron linear accelerator is sequentially connected with the first acceleration cavity and the second acceleration cavity and then outputs electron beams; the first coupler inputs the microwave power to the first acceleration cavity, so that the first acceleration cavity optimizes the electron beam energy spectrum monochromaticity; and the second coupler inputs the microwave power into the second acceleration cavity, so that the second acceleration cavity accelerates the electron beam to required energy. According to the electron linear accelerator, the needed electron beam energy can be achieved only through the two cavities, a large amount of energy of the finally obtained electron beam is concentrated on the needed energy through the acceleration mode, and in other words, the energy spectrum monochromaticity is better.

The invention discloses a piezoelectric cantilever beam energy collector, and the collector comprises a fixed part 1 which is used for fixing the collector at a certain position; the supporting beam and the fixing piece 1 are connected into a whole, the supporting beam comprises a bionic bamboo joint structure 2 close to one end of the fixing piece 1 and a mass structure 3 far away from one end of the fixing piece 1, and at least one micropore 6 penetrating through the upper surface and the lower surface of the supporting beam is formed in the bionic bamboo joint structure 2 and used for forming alternate rigid segments and flexible nodes on the bionic bamboo joint structure 2; the supporting beam swings with the end close to the fixing piece 1 as the circle center in the vibration environment. The mass block 5 is arranged on the mass structure 3; the number of the piezoelectric films 4 is two, the two piezoelectric films 4 are arranged on the upper surface and the lower surface of the bionic bamboo joint structure 2 respectively, and the piezoelectric films 4 cover the micropores 6 formed in the bionic bamboo joint structure 2.

The invention discloses a marine pipeline leakage point and oil leakage accurate detection system and method, a focused ultrasonic detection module of the system emits ultrasonic focused sound beams to a pipeline wall, a signal acquisition and analysis module is used for receiving an ultrasonic echo signal and performing feature extraction, a fluid noise elimination and compensation module filters and corrects the signal, and a detection module is used for detecting the leakage point and oil leakage of a marine pipeline. The sensor array attached to the pipe wall can monitor the temperature, pressure and environment change of the marine pipeline in real time, the control and feedback unit automatically adjusts the focus depth and acoustic beam energy according to an analysis result, fine scanning and enhanced detection of a target area are achieved, and finally leakage point space coordinates and leakage rate estimated values are output. The system can stably operate for a long time in a high-noise and high-pressure marine environment, is high in detection sensitivity and strong in anti-interference capability, can achieve millimeter-level leakage point positioning precision, and is suitable for online health monitoring and intelligent safety management of marine oil and gas conveying pipelines, offshore wind power cooling systems and deep sea energy channels.

The invention discloses a device and method for measuring beam parameters of a neutral beam source, the device comprises the neutral beam source, a deflection magnetic field, an ion receiving electrode and a neutral particle receiving electrode, the deflection magnetic field is located at the downstream of the particle emitting direction of the neutral beam source, and the ion receiving electrode comprises a plurality of tungsten blocks distributed at certain intervals. Water cooling channels are arranged in all tungsten blocks, the neutral particle receiving electrode is positioned at the downstream of the ion receiving electrode and is opposite to the neutral beam source, the neutral particle receiving electrode comprises a neutral particle measuring probe, and a water cooling channel is arranged in the neutral particle measuring probe. The device can realize accurate measurement of neutral beam energy and beam intensity at the same time, and has the characteristics of time saving, high efficiency, simple structure, real-time online detection, capability of displaying instantaneous energy change caused by system state change, high resolution, long service life and the like.

The application provides a one-time forming electron beam welding method for a titanium alloy component with single-sided incidence and double-layer welds, which comprises the following steps: a closed cavity structure titanium alloy component is formed by a plurality of mutually shielded multi-layer thin plates through single-direction electron beam incidence; the focusing current of the electron beam is adjusted; the converging effect of the electromagnetic coil is changed to change the focus position, and then the electron beam keyhole depth and size are changed; the keyhole is adjusted to be an energy channel through which the electron beam passes; the electron beam energy can pass through the first layer of welds to reach the second layer of welds; the controllable linear energy is provided by combining the acceleration voltage, the welding current and the welding speed to ensure that the remaining energy that penetrates reaches the second layer of welds to complete the welding of the second layer of welds again; the low-frequency scanning is combined with the electron beam movement to drive the first layer of molten pool metal to flow and fill the rear channel, and the front channel is opened, so that the channel is dynamically smooth and stable, and the electron beam keyhole effect behavior is adjusted.

Systems for the aiming of a laser beam of wireless power towards the photovoltaic cell of a receiver, using an adjustable beam deflection unit, enabling accurate orientation of the mirror used to deflect the laser beam. Insufficient aiming accuracy may result in the spilling over of beam energy intended for absorption by the photovoltaic cell, into the surroundings. The criteria of accuracy and stability required of an electronically controlled beam aiming mirror must be such that the angular deviation of a beam, from the direction intended by the electronic control, is such that the level of optical power transferred into the surroundings, when a beam having the maximum power which the system can transmit is aimed at the target, does not exceed that allowed by a regulatory requirement. One common regulation limits the allowed dissipated power to the power of a class 3B laser.

The invention discloses a quantitative channel contrast imaging method based on a scanning electron microscope, electronic equipment and a medium, and the method comprises the steps: putting a polycrystalline sample into a scanning electron microscope system, determining an ROI, and obtaining crystal data; adjusting the state of the polycrystalline sample to obtain a cross-correlation diagram of the back scattering electron image and the diffraction contrast value image, so that a back scattering electron beam scanning area is overlapped with the ROI; any position is selected in the ROI, and ECP under the current electron beam energy is calculated; determining a target orientation on the ECP, and determining an optimal path for rotating the polycrystalline sample to the target orientation; acquiring back scattering electron images before and after rotation, performing cross correlation, and moving the polycrystalline sample to enable back scattering electron beam scanning areas before and after rotation to coincide; the scanning electron microscope system is adjusted through the steps, and a series of back scattering electron images of the ROI are collected. According to the invention, the scanning electron microscope can characterize and analyze crystal defects such as dislocation, nano-twin crystal, stacking fault and the like of a block-shaped sample.

The invention discloses an electron beam bunch superposition method and device, and the beam bunch energy of the head part and the tail part of an electron beam bunch is different by adopting a beam energy absorption effect. And then a plurality of alpha magnets are utilized, so that the movement path of the high-energy beam bunches at the head of the beam bunch string is long, the movement path of the low-energy beam bunches at the tail of the beam bunch string is short, and longitudinal superposition and compression of the beam bunch string are achieved. And the alpha magnet can simultaneously realize an achromatic function, so that the transmission envelope after the beam bunch is compressed and superposed is not greatly increased. And the obtained shorter pulse beam can be used for scientific research application such as nuclear data measurement.

The invention provides a structure for improving electron beam energy distribution after beam-wave interaction. The structure comprises a traveling wave interaction circuit, a standing wave interaction circuit and a step-down collector which are sequentially arranged in the electron beam transmission direction. The standing wave interaction circuit comprises a resonant cavity; an electron beam channel of the traveling wave interaction circuit is communicated with an electron beam channel of the standing wave interaction circuit; and the step-down collector is communicated with an electron beam channel of the standing wave interaction circuit. The structure can solve the problem that the whole optimization process becomes more complex due to the existing mode of improving the energy recovery efficiency by optimizing the traveling wave interaction circuit.

A converterless method for converting 226Ra to 225Ac by direct electron beam bombardment with high energy electron beam having an average effective beam power of about 20 to about 250 kW at a beam energy of about 25 to about 100 MeV to impact the 226Ra is disclosed. Contrary to other electron-based bombardment methods, the present method is carried out without a converter that slows the electrons and transforms their kinetic energy into Bremsstrahlung photons, but rather into the production of virtual photons that transmute the target 226Ra to 225Ra that decays to 225Ac.

The invention discloses a nanosecond pulse hollow cathode electron beam current evaluation system, which aims at the problem of limited capacity of a current satellite communication channel, researches a nanosecond pulse high-current electron beam for driving a terahertz radiation source, and measures electron beam current and energy density distribution. The device is fixed on a four-axis motion platform through a Faraday cup with a slit hole, and the four-axis platform comprises an x axis, a y axis, a z axis and an R axis. Under the driving of the four-axis platform, the nanosecond time response Faraday cup can rotate around the z axis and sweep the section of the electron beam at a certain rotation angle in the direction perpendicular to the slit, and accordingly parallel projections of the electron beam at different angles are obtained. And current density distribution of a certain section of the electron beam is obtained through a filtering back projection algorithm program of the computer. On the basis, the three-dimensional density distribution of different energy electrons is obtained by changing the axial distance and the electron energy screening voltage, and then the time-space domain distribution of the electron beam energy density is obtained.

The invention discloses a heat input control method for a multi-electron-beam powder bed melting additive manufacturing process, which adopts a finite element simulation means to control heat input in the additive manufacturing process and can be applied to research and development of powder bed preheating process parameters in the multi-electron-beam powder bed melting additive manufacturing forming process. Through cooperative work of a forming electron beam and a preheating electron beam, a temperature field is dynamically regulated and controlled in combination with finite element simulation, and the problems of large temperature gradient, high residual stress and multiple crack defects in a traditional process are solved; the electron beam is preheated to continuously heat the non-melting area, double-beam energy distribution is optimized in combination with an energy balance equation, and the forming quality and the process efficiency are remarkably improved.

The invention relates to the technical field of semiconductor manufacturing, in particular to a 12-inch wafer matte damaged layer repairing method, which comprises the step of carrying out repairing treatment on the surface of a wafer by adopting multi-stage energy regulation and control type surface repairing equipment, and the equipment comprises a rotary bearing platform, a multi-stage energy injection assembly and a rectification module. By accurately controlling the energy density and the action time of the flow beam, a matte damaged layer on the surface of the wafer is effectively removed, and meanwhile secondary damage is avoided. Embodiments show that the method can reduce the wafer surface roughness from the initial 50-60 nm to below 5 nm, significantly improve the wafer regeneration quality and efficiency, and meet the actual production requirements. According to the invention, efficient and accurate repair can be realized, and reliable technical support is provided for wafer reutilization.

The invention belongs to the technical field of laser accelerators, and particularly relates to a wedge-shaped supersonic gas target for a laser accelerator, which comprises a target body and a base, the upper end face and the lower end face of the target body are respectively provided with a gas nozzle and a gas inlet, a wedge-shaped cavity is arranged in the target body, and the wedge-shaped cavity is respectively communicated with the gas inlet and the gas nozzle. The density distribution of the supersonic gas jet jetted from the gas jet hole in the laser transmission direction is in positive gradient distribution; the target body is arranged on a base, and the base is provided with a slit matched with the air inlet. According to the wedge-shaped supersonic gas target conforming to the electron transport characteristic of the laser accelerator, the density distribution of supersonic gas jet in the laser transmission direction is in positive gradient distribution, and the gas density can be continuously increased; the phase loss effect of phase mismatching generated by the electron beam is avoided, the energy and monoenergy of the electron beam are effectively improved, and the high-quality electron beam is provided for the laser accelerator in the aspects of ultrafast radiation source driving, ultrafast process diagnosis, high-resolution imaging and the like.

The invention discloses an ion thinning instrument control method based on a self-adaptive gradient energy reduction algorithm, and belongs to the technical field of transmission electron microscope (TEM) sample preparation. The problem that a traditional ion thinning technology has many limitations is solved, dynamic optimization of parameters such as ion beam energy, beam current density and sample temperature is achieved through the self-adaptive gradient energy reduction algorithm, and the sample preparation efficiency is remarkably improved; by combining multi-modal data acquisition and dynamic gradient optimization, the thinning process can be accurately controlled, and the sample quality is improved; sample damage is effectively avoided by combining a damage constraint mechanism and self-adaptive step length control, and the stability of the preparation process is improved; the method is suitable for various materials through a pre-stored optimization path library, and has wide applicability; therefore, the energy of the ion beam is optimized, the incident angle and the beam density are dynamically adjusted, and the thinning instrument is controlled.

The invention relates to the technical field of accelerator beam diagnosis, in particular to a non-interception probe for real-time measurement of beam energy and beam intensity and a use method thereof, the non-interception probe comprises a vacuum pipeline and two sensing mechanisms, the end part of the vacuum pipeline is provided with a mounting flange, and the mounting flange is used for connecting an accelerator; the two induction mechanisms are arranged on the peripheral side of the vacuum pipeline in a spaced mode in the axial direction of the vacuum pipeline, and the induction mechanisms are used for inducing beam currents passing through the vacuum pipeline and generating induction current signals; the two induction mechanisms are respectively provided with a first signal output port feed-through, a second signal output port feed-through and a third signal output port feed-through which are used for outputting induction current signals, and the first signal output port feed-through and the second signal output port feed-through are electrically connected with data acquisition equipment; the third signal output port feed-through is electrically connected with data acquisition equipment through an IV conversion circuit, so that the occupied space can be effectively reduced, and the design and implementation of a miniaturized accelerator are greatly facilitated.

The present invention concerns a charged particle beam therapy system comprising: • a patient unit (10), • an accelerator unit (20) configured for accelerating charged particles, • a beam transport system (30) configured for guiding the particles beam of energies (Ej) varying between 40 and 450 MeV / u, along corresponding beam trajectories (40e) centred on a median trajectory (40m) to a target (11) located within the patient unit (10), wherein the beam transport system (30) comprises, • a bending unit (33) comprising a gap (33g) between poles (33p) of a fixed field dipole configured for receiving and bending the median trajectory (40m) in a bending plane (Y, Z). The beam transport system (30) further comprises an upstream steerer (35u) located upstream of the bending unit (33) and configured for deflecting the beam trajectories (40e) away from the median trajectory (40m) in the bending plane (Y, Z). A magnitude of the uniform magnetic field (B35) in the upstream steerer (35u) can be controlled to vary an entry position (Yij) and an entry angle (θ33i) of the beam trajectory at the bending unit inlet (33i) as a function of a beam energy (Ej,) of the particles beam.

The invention discloses a stainless steel plate laser cutting machine, and belongs to the field of laser cutting machines. A connecting plate is fixedly connected to the top of the base, a first rotating rod is rotatably connected to the top of the connecting plate through a bearing, a rotating disc is fixedly connected to the bottom of the first rotating rod, a frame is fixedly connected to the bottom of the rotating disc, a limiting rod is fixedly connected to the front face of the frame, and a connecting block is slidably connected to the outer wall of the limiting rod. The bottom of the connecting block is fixedly connected with a laser cutting head, and the top of the rotating disc is slidably connected with a sliding block. By adjusting rotation of the motor and the first rotating rod, the laser cutting head can conduct cutting along a machined part, the problem that light beam energy distribution is uneven during beveling operation, the uneven distribution possibly causes the problem that the upper portion of a bevel edge is wide and the lower portion of the bevel edge is narrow is solved, through accurate adjustment, it is guaranteed that light beam distribution is even during cutting, and cutting efficiency is improved. Therefore, the non-ideal cutting effect caused by inclined cutting is avoided.

The invention discloses a migration distribution analysis method for inclusions in electron beam cold bed furnace smelting, a storage medium and equipment, and belongs to the technical field of metal smelting simulation. Actual working condition data of an electron beam cold bed furnace are obtained, and a cold bed unit model is constructed based on numerical simulation; and then electron beam energy input setting and metal solidification and melting setting are carried out in sequence, and cold bed unit heat exchange setting is carried out based on a convective heat exchange model. Performing steady state simulation on the cold bed unit, and when the field domain of the physical field reaches a steady state, simulating the movement of the inclusion in the melt by adopting a discrete random track model; movement tracks of the inclusions under different operation conditions are simulated, the migration process of the inclusions is tracked, and migration distribution of the inclusions is obtained. Migration behaviors of different types of inclusions in the cold bed unit are accurately simulated through numerical simulation, it is ensured that the inclusions flow into a crystallizer as little as possible, and the overall efficiency of the smelting process and the final product quality are improved.

A dual-radionuclide production target includes a first radionuclide target that produces a first radionuclide when irradiated by a particle beam from a radionuclide production system, and a second radionuclide target that produces a second radionuclide when irradiated by the particle beam that has passed through, and been degraded by, the first radionuclide target. With this design, the first radionuclide target serves two purposes: it reduces the beam energy to a suitable energy for isotope production on the second radionuclide target, and in-doing so becomes activated with a medically relevant radionuclide that can be easily extracted. In this way, in a single production run can produce two or more radionuclides.

The invention relates to a device and method for testing a deep ultraviolet laser damage threshold of an element, and the device comprises a first laser module which is set to emit deep ultraviolet laser; the second laser module is set to emit ultrashort pulse laser with the same light spot size as that of the first laser module; the beam combining module is arranged to enable the laser emitted by the first laser module and the laser emitted by the second laser module to be coaxial and emit the modulated laser to a test element; the detection module comprises a first detection unit and a second detection unit which are used for detecting light beam energy, the first detection unit is arranged on a light path of the beam combining module and the test element, and the second detection unit is arranged in a light path penetrating out of the test element; and the control module is respectively connected with the first laser module and the second laser module and is used for controlling laser energy emitted by the first laser module and the second laser module and determining a deep ultraviolet laser damage threshold value of the test element according to information sent by the first detection unit and the second detection unit.

A system for shaping a beam and adjusting a beam energy density includes a laser source, a collimator mirror, a spatial light modulator, an X-direction mirror, a focusing assembly, and a Y-direction mirror. The spatial light modulator includes a binary grating and a mask which are disposed in sequence. A laser beam emitted by the laser source sequentially passes through the collimator mirror, the spatial light modulator, the X-direction mirror, the focusing assembly, and the Y-direction mirror, the laser beam is shaped by changing a diffraction period of the binary grating, an energy density distribution of the laser beam is changed by adjusting a grating density of the mask, and the X-direction mirror and the Y-direction mirror are used for a dynamic scanning movement of the laser beam.

The invention discloses a manufacturing method of a three-dimensional gray scale structure and a three-dimensional micro-nano structure based on low-voltage ice gel electron beam exposure. The manufacturing method comprises the following steps: depositing an ice layer on a processing surface; then, low-energy electron beam layered exposure is utilized, the ice layer of the specific part of each layer is removed, and finally a three-dimensional gray scale ice sculpture structure with a specific gray scale pattern is formed; selectively depositing a material on the three-dimensional ice sculpture structure by adopting physical vapor deposition to form a three-dimensional micro-nano structure; the ice layer is water ice; and the energy of the low-voltage electron beam is lower than 5keV. According to the method, a three-dimensional ice sculpture structure without a supporting structure can be obtained by utilizing the characteristics of iEBL and low-energy exposure in water ice, and gray scale ice sculpture can be successfully converted into a high-purity three-dimensional metal structure. The breakthrough provides potential for improving nano device manufacturing by adopting a water ice resist, and establishes a key technical position of the iEBL in construction of a fine and pollution-free three-dimensional metal nano structure.

Radiation treatment planning includes accessing values of parameters such as a number of beams to be directed into sub-volumes in a target, beam directions, and beam energies. Information that specifies limits for the radiation treatment plan are accessed. The limits include a limit on irradiation time for each sub-volume outside the target. Other limits can include a limit on irradiation time for each sub-volume in the target, a limit on dose rate for each sub volume in the target, and a limit on dose rate for each sub-volume outside the target. The values of the parameters are adjusted until the irradiation time for each sub-volume outside the target satisfies the maximum limit on irradiation time.

The invention relates to an under-beam device for treating sewage through electron beam irradiation. The device comprises a water storage tank, an inclined flow channel, a rectifying device, a sewage outlet and an irradiation area. The sewage storage tank is arranged at the topmost end and used for collecting sewage; the inclined flow channel is positioned below a beam outlet of the electron accelerator and is used for guiding sewage to flow along a preset path and receiving electron beam irradiation; the rectifying device is arranged at the upper part of the runner and is used for adjusting and optimizing the flowing state of sewage; an electron accelerator is arranged above the irradiation area and is used for carrying out irradiation treatment on the sewage; the sewage outlet is used for discharging the treated sewage. The speed distribution of the sewage flowing layer is regulated and controlled by adjusting the inclination angle and the gradual shrinkage angle of the inclined flow channel and the structure of the vertical baffle, and the uniformity of the sewage absorbing dose is improved. The device can improve the utilization rate of electron beam energy and enhance the sewage treatment effect, and has remarkable economic value.

The present invention belongs to the technical field of laser damage measurement, and relates to a real-time multi-angle damage measurement system and method for an optoelectronic imaging detector. The measurement system includes: a laser emission unit, a first incident unit, a second incident unit, a detection light source, a measurement unit, and a controller. The laser emission unit is used to emit a laser beam with adjustable energy and type. The laser beam irradiates the same preset area on the optoelectronic imaging detector along the optical path constructed by the first incident unit and along the optical path constructed by the second incident unit, and the energy of the laser beam is equal. The detection light source enables the optoelectronic imaging detector to be controllably in a light-illuminated working condition or a non-light-illuminated working condition. The measurement unit is used to measure the damage image output by the optoelectronic imaging detector, the energy distribution characteristics of the laser spot, and the surface damage morphology image of the optoelectronic imaging detector. The controller receives the images output by the measurement unit and can issue four control commands. The present invention can achieve damage measurement under the action of multi-angle co-irradiation of the laser.