26 results about "Beam trajectory" patented technology

The invention provides a proton dose distribution determination method and device based on a graphics processor, which can be applied to the technical field of medical radiation dose calculation. The method comprises the following steps: calculating pencil beam tracks of a plurality of pencil beams; obtaining respective dose nuclear parameters of the pencil beam at a plurality of intersection points; according to the radiation field dose truncation radius, voxels of interest are determined from tissue voxels in the tissue voxel grid, and the radiation field dose truncation radius represents the upper limit value of the acting distance of all pencil beams in one radiation field to generate remarkable contribution to dose distribution in the transverse direction; calling a plurality of threads to execute dose calculation tasks of the plurality of voxels of interest in parallel based on the respective dose kernel parameters of the plurality of intersection points to obtain voxel deposition doses of the voxels of interest; and determining a dose distribution result related to the specified tissue according to the voxel deposition doses of the plurality of voxels of interest.

This invention discloses a laser engraving system and method for a high-ink-capacity ceramic anilox roller, relating to the field of ceramic roller laser engraving, aiming to solve the problems of limited ink capacity and low production efficiency in existing technologies. The system includes a laser head, a ceramic roller, and a cell observation instrument, and also includes modules for cell image acquisition, test point positioning, engraving control, analysis, and sub-scanning planning. The laser head includes a laser, a high-frequency torque motor, etc. The high-frequency torque motor can drive the movement of a reflector to adjust the laser beam trajectory. The method generates anilox data, positions cells and test points, matches laser power to engrave test points, compares data output strategies, and dynamically adjusts the sub-scanning trajectory before engraving. This invention adopts a dual-scanning trajectory, combined with real-time visual feedback to adaptively control laser power and trajectory, to achieve fine cell engraving, improve ink capacity, ink transfer uniformity, and production efficiency, and avoid ceramic damage.

The invention belongs to the technical field of laser interference precision measurement, and provides a full geometric error displacement calculation method based on non-approximate simplification of a light beam track. All optical machine geometric errors can be completely calculated, the real refraction condition can be completely calculated, no approximate error is introduced in the simplification process, and the displacement calculation process conforms to the real light beam track condition; according to the method provided by the invention, all reflection phenomena in the interferometer are simplified, parameter integration is carried out on a reflecting surface and a receiving surface of a reflected light beam, an originally complicated multi-beam calculation process is optimized, the number of parameter items required for completely describing geometric errors is reduced, and the calculation efficiency is improved. And meanwhile, the light beams which do not influence the calculation of the total optical path difference are deleted, so that the calculation efficiency is high.

The application discloses a kind of for gyro device coil magnet and electron gun collaborative optimization design method, belong to microwave millimeter wave technical field.The application first establishes the mapping relationship between multi-coil configuration parameter and three-dimensional magnetic field distribution;Then establish the potential distribution in the two-dimensional plane of electron gun, solve electron beam trajectory under given magnetic field distribution;Establish the mapping relationship between electron gun electrode structure parameter and electron beam performance parameter;Again establish the mapping relationship between electron gun performance parameter and electron gun electrode shape and solenoid configuration parameter;Finally, establish the fitness function of evaluating electron beam quality, introduce global optimization algorithm to realize the optimization design of electron gun performance.The application has high design freedom, high universality, can realize high-performance comprehensive design, and also has the advantages of fast calculation speed, high precision, good numerical calculation stability.

This invention discloses a sensor-integrated multi-UAV beam trajectory design method for anti-UAV operations. First, a system model is constructed, defining the channel model, signal model, and power consumption model. Then, a mathematical model of the long-term Cramer-Rao bound (CRB) minimization problem is established, and the optimization problem is reconstructed, addressing uncertainties in the optimization objective. Next, the problem is broken down into three sub-problems: joint optimization of transmit and receive beams, joint optimization of user association and UAV scheduling, and UAV trajectory optimization. These sub-problems are solved using Lagrange relaxation, semi-definite relaxation, and penalized successive convex approximation methods, respectively. Finally, an alternating iterative strategy is used to coordinate the solutions to these sub-problems. This invention solves problems in existing technologies such as incomplete coverage, poor sensing performance, signal interference, and positional uncertainty caused by UAV maneuvers, improving cooperative sensing performance and meeting the dual requirements of flexible sensing and reliable positioning.

The application provides a synchronous accelerator multi-harmonic beam trajectory reconstruction method and system, and relates to the technical field of accelerators. The method comprises the following steps: obtaining an accelerating cavity high-frequency signal of the synchronous accelerator, so as to generate a frequency-synchronized reference waveform according to the accelerating cavity high-frequency signal; setting a phase trigger window based on the reference waveform, so as to control the synchronous acquisition of beam signals of a full ring of the synchronous accelerator by a beam diagnosis device of the full ring; performing time domain analysis on the beam signals to obtain an effective beam signal interval, so as to calculate position data of the beam signals based on the effective beam signal interval; and reconstructing the motion trajectory of the beam according to the position data of the beam signals, which can accurately identify and associate the data of the same beam in the multi-harmonic acceleration process.

Provided are a vacuum duct and an accelerator that allow charged particles to pass in intersecting directions, without having to have a plurality of ducts with different degrees of vacuum three-dimensionally intersect with each other. According to one embodiment, a vacuum duct includes: a first duct configured to form a first beam trajectory of charged particles; a vacuum chamber provided in a straight part of the first duct; and a second duct configured to form a second beam trajectory that intersects with the first beam trajectory inside the vacuum chamber.

To provide a vacuum duct and an accelerator that can pass charged particles in directions crossing each other without three-dimensionally crossing a plurality of ducts different in the degree of vacuum.SOLUTION: A vacuum duct 10 comprises: a first duct 21 that forms a first beam trajectory 11 of charged particles; a vacuum vessel 15 that is provided by cutting the middle of a linear portion of the first duct 21; and a second duct 22 that forms a second beam trajectory 12 intersecting the first beam trajectory 11 inside the vacuum vessel 15.SELECTED DRAWING: Figure 1

The application discloses an L-shaped electron beam trajectory electron gun and belongs to the technical field of electron beam processing equipment. The L-shaped electron beam trajectory electron gun comprises a transverse gun barrel and a longitudinal gun barrel connected with the transverse gun barrel, the axis of the transverse gun barrel is perpendicular to the axis of the longitudinal gun barrel; an electron beam generator and a first electron beam correction device are sequentially arranged in the transverse gun barrel along the axis of the transverse gun barrel; a second electron beam correction device and a deflection scanning device are sequentially arranged in the longitudinal gun barrel along the axis of the longitudinal gun barrel; a deflection device is arranged at the joint of the transverse gun barrel and the longitudinal gun barrel, and is used for deflecting the electron beam from the first electron beam correction device by 90 DEG and then introducing the electron beam into the second electron beam correction device; a first air exhaust port is formed in the transverse gun barrel and corresponds to the position of the electron beam generator; and a second air exhaust port is formed in the top end of the longitudinal gun barrel. The application changes the flight path of the electron beam inside the electron gun, and utilizes the screening effect of the electromagnetic field on the charged particles to physically isolate the dust from entering the core area.

A laser welding method, comprising the following steps: setting a laser beam trajectory, and the movement speed of a first weld part and a second weld part, wherein the laser beam trajectory comprises an oscillation trajectory and an oscillation frequency; arranging the first weld part and the second weld part, wherein there are at least two intersection points between the oscillation trajectory and a gap to be welded that is between the first weld part and the second weld part; and moving the first weld part and the second weld part at the movement speed, and activating a laser beam to weld the first weld part and the second weld part along the laser beam trajectory. The method can weld larger gaps by means of at least two intersections between the laser beam oscillation trajectory and the gap to be welded, thereby reducing the arrangement precision between parts to be welded, and also enhancing the effective sealing depth of a weld and improving welding sealing performance. The present invention further relates to a compressor.

The present invention relates to a charged particle beam therapy system comprising: a patient unit (10); an accelerator unit (20) configured to accelerate charged particles; and a beam transport system (30) configured to guide a particle beam having an energy (Ej) between 40 and 450 MeV / u along a corresponding beam trajectory (40e) centered on a central trajectory (40m) to a target (11) located within the patient unit (10), wherein the beam transport system (30) comprises: a bending unit (33) having a gap (33g) between the poles (33p) of a fixed magnetic field dipole, the bending unit being configured to receive and bend the central trajectory (40m) in a bending plane (Y, Z). The beam transport system (30) further comprises an upstream stairer (35u) located upstream of the bending unit (33) and configured to deflect the beam trajectory (40e) from the central trajectory (40m) in a bending plane (Y, Z). The magnitude of the uniform magnetic field (B35) in the upstream stearer (35u) can be controlled to change the entry position (Yij) and entry angle (θ33i) of the beam trajectory at the bending unit entrance (33i) according to the beam energy (Ej) of the particle beam.

The present invention suppresses the influence of secondary electrons on a beam trajectory while using an aperture substrate to detect a beam current. An electron beam lithography device according to the present invention comprises: an emission part which emits an electron beam; an aperture substrate in which an aperture that the electron beam passes through is formed and which partially blocks the electron beam; a deflector which deflects the electron beam that has passed through the aperture of the aperture substrate and which draws a pattern on a drawing target substrate by irradiating the drawing target substrate with the electron beam; a wire which is connected to the aperture substrate and through which current based on the electron beam having been partially blocked by the aperture substrate flows; a current detector which is connected to the wire and which detects the current; and a voltage dropping element which is connected in series to the wire that connects the aperture substrate and the current detector and which applies negative potential to the aperture substrate.

The invention relates to the technical field of optical equipment control, and discloses a control method and system for improving the pointing precision of a galvanometer, and the method comprises the steps: obtaining the related data of the galvanometer, extracting a signal, calculating a charge density deviation vector, and obtaining a disturbance frequency spectrum and charge deviation characteristics; calculating electric field intensity gradient, adjusting voltage amplitude and phase according to deviation, and obtaining charge density distribution; the uniformity of the density distribution is analyzed, the voltage sequence is corrected according to the uniformity, and corrected electric field distribution is formed; calculating a beam deflection angle, performing path compensation, and generating a beam path compensation vector; converting the vector into a voltage control signal and updating a compensation value to obtain a stable light beam pointing sequence; continuously acquiring a real-time light beam track, and calculating a deviation integral value with the pointing sequence; and if the disturbance data exceeds the preset threshold value, reprocessing the disturbance data through backtracking analysis, and formulating an enhanced charge density regulation and control scheme. The method can solve the problem of insufficient pointing precision of the galvanometer in the prior art.

The invention discloses a beam separation device and method based on an isotope electromagnetic separator. The device comprises a receiver panel arranged on a receiver of the isotope electromagnetic separator, a beam receiving pocket, an insulating block and a plurality of tungsten rods used for measuring beam intensity and width. And the baffle blocks are used for blocking particles sputtered in the adjacent beam receiving pockets. The method comprises the following steps: calculating a separation radius R, a valley region width delta R and a beam spot width W of the electromagnetic separator; according to the separation radius R, the valley region width delta R and the beam spot width W, the fixed position of the tungsten rod is obtained; a beam trajectory diagram is obtained according to the separation radius R, the valley region width delta R and the beam spot width W; and the fixed position of the stop block is calculated according to the beam trajectory diagram. According to the method, the target isotope abundance is improved from 98% to 99.5%. The time for adjusting the beam is reduced, the loss caused by the fact that the ion beam is not aligned with the receiving seam is reduced, and the isotope productivity is improved: the productivity of 176Yb is improved from 18g / year to 22g / year.

This invention discloses a method and system for joint optimization of beam trajectories of a UAV millimeter-wave ISAC system under low-altitude rain attenuation. The method includes the following steps: S1, constructing a model of the UAV millimeter-wave ISAC system under rain attenuation conditions, the model including system architecture, dual-function frame structure, and communication and sensing channel models for rain attenuation correction; S2, establishing a joint optimization problem with the goal of maximizing the weighted sum and rate of multiple users within the mission cycle, incorporating multiple types of physical and performance constraints, and determining the communication beam, sensing beam, and UAV three-dimensional trajectory as the core optimization variables. This invention constructs a joint optimization framework for communication beams, sensing beams, and UAV flight trajectories in rain attenuation environments. Under a unified optimization model, it comprehensively considers transmit power constraints, communication QoS constraints, sensing reliability constraints, and UAV kinematic constraints, enabling coordinated adjustment of communication resource allocation and UAV maneuvering strategies, thereby more effectively adapting to link changes in the non-uniform rain attenuation environment of low-altitude space.

To provide a take-away posture confirmation device which enables a user to practice a take-away posture by making it possible to visually recognize the state of a user's club shaft at a take-away stage by using a light source.SOLUTION: The present invention provides a take-away posture confirmation device of a golf club for confirming the take-away posture, which includes a head 100, a shaft 120, and a grip 130. A slit beam irradiation part 200 is arranged on the head 100 or a predetermined portion of the shaft to radiate a slit beam at a predetermined angle. If necessary, the slit beam irradiation part 200 may be arranged on the head 100 or a predetermined portion of the shaft. The slit beam irradiation part includes: a fixing part 210 fixed to the shaft; and a laser generation part 250 fixed by the fixing part to radiate the slit beam 270. The slit beam 270 generated from the laser generation part is radiated onto the ground surface 90 on which a golf ball is placed to form a beam trajectory 255.SELECTED DRAWING: Figure 3

This invention discloses a rapid alignment and adjustment device and method for a Dowell prism rotary cutting system. The device includes a dual-mirror modulation unit, a Dowell prism rotation unit, a CCD viewing unit, and a focusing unit sequentially arranged on the incident laser beam path, as well as controllers connected to each unit. The dual-mirror modulation unit includes X1, X2, Y1, and Y2 mirrors, which respectively adjust the position translation and angle deflection of the laser beam in the X and Y directions. The Dowell prism rotation unit adjusts the static laser beam into a dynamic outgoing beam. The CCD viewing unit observes the processing plane of the workpiece to be processed and acquires the beam trajectory. The focusing unit focuses the incoming laser beam onto the workpiece for processing. The controller controls the angle of the mirrors in the dual-mirror modulation unit according to the beam trajectory. This achieves automatic calibration of the incident beam from the Dowell prism.

The present invention provides a take-away posture confirmation device of a golf club for confirming the take-away posture, which includes a head, a shaft, and a grip, and a slit beam irradiation part, which irradiates a slit beam onto the head or a predetermined portion of the shaft at a predetermined angle, is arranged. If necessary, the slit beam irradiation part may be arranged on the shaft adjacent to the head. The slit beam irradiation part includes: a fixing part fixed to the shaft; and a laser generation part fixed by the fixing part to irradiate the slit beam, wherein the slit beam generated from the laser generation part is irradiated onto the ground surface on which a golf ball is placed to form a beam trajectory.

The present invention provides a vacuum duct and an accelerator which make it possible for charged particles to pass through in intersecting directions without causing a plurality of ducts having differing degrees of vacuum to cross three-dimensionally.　A vacuum duct (10) comprises: a first duct (21) that forms a first beam trajectory (11) of a charged particle; a vacuum container (15) that is provided so as to divide a linear portion of the first duct (21) partway therealong; and a second duct (22) that forms a second beam trajectory (12) which intersects the first beam trajectory (11) inside the vacuum container (15).

The application provides a kind of based on graphics processor's proton dose distribution determination method and device, can be applied to medical radiation dose calculation technical field.The method comprises: calculating the respective pen beam trajectory of multiple pen beams;Obtain the respective dose kernel parameter of pen beam at multiple intersection points;According to field dose cutoff radius, determine the voxel of interest from the tissue voxel in the tissue voxel grid, wherein the field dose cutoff radius represents the upper limit value of the action distance of all pen beams under one field that significantly contributes to dose distribution in the transverse direction;Based on the respective dose kernel parameter of multiple intersection points, call multiple threads and execute multiple dose calculation tasks of voxel of interest in parallel, obtain the voxel deposition dose of voxel of interest;According to the respective voxel deposition dose of multiple voxel of interest, determine the dose distribution result related to specified tissue.

This invention relates to the field of accelerator magnet technology and discloses a magnet structure for a superconducting cyclotron accelerator, including a magnetic support base and a main magnet fixed on the magnetic support base. The main magnet has magnetic pole slots formed at the edges of its magnetic poles along a predetermined beam extraction trajectory. The cross-section of the magnetic pole slots is a U-shaped structure extending along the beam trajectory direction. Support shells are provided on the outer sides of the magnet and the magnetic support base. This invention, by forming magnetic pole slots of a specific shape at the edges of the main magnet's magnetic poles, not only effectively excites coherent radial oscillations of the beam, improving beam extraction efficiency, but also enables rapid beam focusing, improving beam quality. It reduces the number of magnetic channels to two. Simultaneously, it incorporates a shock-absorbing component and a support measuring element, utilizing hydraulic damping and spring buffering mechanisms to provide shock and vibration protection for the magnet structure. Furthermore, the multi-point adjustable positioning function of the support measuring element improves the convenience and flexibility of magnetic field measurement and reduces space waste.

The invention provides a vacuum pipeline and an accelerator, which can enable charged particles to pass through in a mutually intersecting direction without three-dimensionally intersecting a plurality of pipelines with different vacuum degrees. A vacuum duct (10) is provided with: a first duct (21) that forms a first beam trajectory (11) for charged particles; a vacuum container (15) provided so as to cut off the midway of the linear portion of the first duct (21); and a second duct (22) that forms a second beam trajectory (12) that intersects the first beam trajectory (11) inside the vacuum container (15).

To suppress an influence of a secondary electron on a beam trajectory while detecting a beam current by using an aperture substrate.SOLUTION: An electron beam drawing apparatus according to an aspect of the present invention includes: a discharge part that discharges an electron beam; an aperture substrate in which an opening through which the electron beam passes is formed and that shields a part of the electron beam; a deflector that deflects the electron beam that has passed through the opening of the aperture substrate and irradiates a drawing target substrate with the electron beam to draw a pattern; a wiring that is connected to the aperture substrate and through which a current based on the electron beam shielded by the aperture substrate flows; a current detector that is connected to the wiring and detects the current; and a voltage drop element that is connected in series to the wiring that connects the aperture substrate and the current detector and applies a negative potential to the aperture substrate.SELECTED DRAWING: Figure 1

The invention relates to the technical field of accelerator magnets, and discloses a magnet structure for a superconducting cyclotron, which comprises a magnetic support seat and a main magnet fixed on the magnetic support seat, and is characterized in that a magnetic pole groove is formed in the magnetic pole edge of the main magnet along a preset leading-out track of a beam; the section of each magnetic pole groove is of a U-shaped structure extending in the beam trajectory direction, and a supporting shell is arranged on the outer side of the magnet and the outer side of the magnetic supporting base. The magnetic pole grooves in specific shapes are formed in the magnetic pole edges of the main magnets, coherent radial oscillation of the beam is effectively excited, the beam extraction efficiency is improved, the beam can be quickly focused, the beam quality is improved, multiple magnetic channels can be reduced to two, and the vibration protection part and the supporting and testing piece are arranged, so that the detection accuracy is improved. A hydraulic damping and spring buffering mechanism is utilized to provide impact resistance and shock absorption protection effects for the magnet structure, and through the multi-point adjusting and positioning function of the supporting and measuring piece, the convenience and flexibility of magnetic field measurement are improved, and space waste is reduced.

The invention relates to a charged particle beam therapy system comprising: a patient unit (10); an accelerator unit (20) configured for accelerating the charged particles; a beam delivery system (30) configured for directing a particle beam having an energy (Ej) varying between 40 MeV / u and 450 MeV / u along a corresponding beam trajectory (40e) centered on a median trajectory (40m) to a target (11) located within the patient unit (10) wherein the beam delivery system (30) comprises a turning unit (33) comprising a gap (33 g) located between poles (33p) of the fixed field dipoles, the turning unit is configured to receive a median trajectory (40m) and turn the median trajectory in a turning plane (Y, Z). The beam delivery system (30) further comprises an upstream guide (35u) located upstream of the deflection unit (33) and configured for deflecting the beam trajectory (40e) in the deflection plane (Y, Z) away from the median trajectory (40m). The size of the uniform magnetic field (B35) in the upstream guide (35u) can be controlled such that the entry position (Yij) and the entry angle (33i) of the beam trajectory at the bend unit entrance (33i) vary depending on the beam energy (Ej) of the particle beam.

The application discloses a kind of self-accelerating circular airy light beams in nonlinear Kerr medium trajectory control method, this method includes: introducing circular airy light beam in nonlinear Kerr medium;By the phase control function of self-accelerating circular airy light beam trajectory analytical derivation declared in the application;Phase control function is combined with circular airy light beam, and further adjustment of relevant parameters can obtain circular airy light beam along target trajectory transmission.In addition, among numerous nonlinear optical effects, Kerr effect is concerned due to its unique properties, that is, the refractive index of the medium will change with the change of light intensity.This phenomenon not only has important significance in theory, but also shows extensive potential value in practical application.The application can effectively control the propagation trajectory of circular airy light beam in nonlinear Kerr medium by saving time and material cost, improving work efficiency.