7 results about "Beam trajectory" patented technology

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.

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.

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.

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.