21 results about "Particle acceleration" patented technology

A particle acceleration and extraction system includes a cyclotron having a stripping assembly and a target. The cyclotron includes an acceleration chamber and is operable to generate a magnetic field and an electric field in the acceleration chamber such that charged particles in the acceleration chamber are accelerated along a spiral path extending outward and at increasing energies from an initial energy E1 to a final energy E2, E2 being greater than E1. The target defines a target location outside of the acceleration chamber. The stripping assembly is positioned in the acceleration chamber and is operable to extract a charge from the charged particles at an intermediate location of the outward spiral path whereby the post-stripping assembly particles are directed towards the target location. The charged particles have an intermediate energy E3 at the intermediate location that is between E1 and E2.

The invention discloses a microwave measurement and control device, and relates to the technical field of particle acceleration. The antenna comprises a backboard, a radio frequency unit and a tuning unit. The backboard is provided with a high-speed serial transmission channel; the radio frequency unit is connected with the backboard to collect radio frequency field state data of the accelerator cavity; the tuning unit is connected with the backboard to output a driving signal to adjust the resonant frequency of the cavity. Wherein the radio frequency unit and the tuning unit establish a direct connection link through a high-speed serial transmission channel, and the tuning unit cooperatively adjusts the resonant frequency of the cavity according to radio frequency field state data. A traditional CPCI architecture is optimized through the backboard, the high-speed serial transmission channel comprises the first communication channel, radio frequency field state data does not need to be transferred and is directly transmitted to the tuning unit through the high-broadband and high-performance first communication channel, the problems of large transmission delay and cooperative lagging caused by bandwidth sharing of an existing CPCI architecture are effectively solved, and the communication performance of the CPCI architecture is improved. Tuning can be rapidly carried out through closed-loop control, and the stability of the accelerator beam is remarkably improved.

The invention provides a calculation compensation method for an isochronous magnetic field of a cyclotron, and relates to the technical field of data processing, and the method comprises the steps: carrying out the particle tracking through a numerical integration method, and adjusting the initial parameters of particles through iterative search, when the deviation between the position and the momentum of the particle after the particle moves for one circle and the initial value is within a preset error range, obtaining a closed orbit of the charged particle; on the basis of a closed orbit, radial and axial tiny disturbance is applied to the initial state of the particles, multi-circle movement of the particles is tracked, oscillation data is recorded, fast Fourier transform analysis is conducted on the oscillation data, and radial oscillation frequency and axial oscillation frequency of the particles are extracted; and calculating the cyclotron frequency of the particles according to the closed orbit, and generating parameters for evaluating and compensating the isochronous magnetic field of the cyclotron in combination with the radial oscillation frequency and the axial oscillation frequency. The operation stability and the particle acceleration efficiency of the accelerator can be effectively improved.

The application relates to an acceleration measuring device based on a particle image velocimetry, which comprises at least two CCD cameras, the center points of the mirrors of the two CCD cameras are located on a straight line through a limiting device; a tracer particle generator is used for emitting tracer particles along the direction vertical to the normal of the mirror of the CCD camera; a four-pulse laser is used for sequentially emitting four pulse laser beams along the direction vertical to the direction of the particle flow to illuminate the tracer particles; a control device is connected with the CCD camera and the four-pulse laser respectively, and is used for synchronously controlling the CCD camera and the four-pulse laser, so that the CCD camera acquires the tracer particle images under the irradiation of different pulse lasers in a double-exposure mode, and the speed and acceleration of the particles are acquired based on the tracer particle images. Since the four-pulse laser capable of sending four high-energy pulse lasers at a time is adopted, at least four particle images with a very short time interval are acquired by using two CCD cameras, and then the particle acceleration can be acquired.

The invention discloses an electron cyclotron synchronous acceleration method and system based on dynamic magnetic field modulation, belongs to the technical field of particle acceleration, and aims to solve the problems that in the prior art, the magnetic field adjustment precision is low, and the stability of the acceleration process is difficult to guarantee due to the non-uniform frequency change of the magnetic field in the dynamic magnetic field modulation process. Comprising the following steps: S1, monitoring electron energy change in real time; s2, dynamically adjusting magnetic field intensity and distribution based on energy change; s3, adjusting the electromagnetic wave frequency to be matched with the electron cyclotron frequency; s4, optimizing space-time distribution of the magnetic field; the electronic energy change is accurately matched, the acceleration energy loss is greatly reduced, the speed and position of the electron beam are tracked through high-precision detection equipment by means of the energy monitoring module, the electronic energy change information is acquired and calculated in real time, and accurate data support is provided for magnetic field adjustment; after receiving the energy data, the control unit drives the magnetic field adjusting module to dynamically adjust the magnetic field intensity to ensure that the electron cyclotron frequency is always synchronous with the magnetic field.

The invention discloses a method for calculating the mode purity of a high-quality factor TM010 over-mode cylindrical resonant cavity, and belongs to the field of electromagnetic field propagation. According to the method, structural details of a coupling hole, an end cover step and a fit clearance are covered in modeling; all possible competition modes are covered through functional region decomposition and electromagnetic field mode decomposition in combination with a mode excitation rule of an over-mode cavity; introducing power normalization processing, and establishing a unified amplitude comparison reference; based on the synergistic effect of scattering matrix cascading and electromagnetic field mode decomposition, the transmission, reflection and coupling processes of multiple modes in the cavity are completely described; according to the invention, the problems that only the mode purity of the port plane and the electromagnetic field distribution in the volume can be obtained and the mode purity of a specific mode in the volume of the resonant cavity cannot be accurately calculated in the prior art are solved; the method is applied to the core technologies of microwave communication, satellite load, particle acceleration, precision measurement and the like depending on high-quality factor resonant cavities to accurately calculate the TM010 mode purity in the volume of the resonant cavity.

The invention discloses an integrated bunching and energizing standing wave acceleration structure, and relates to the technical field of particle acceleration, the integrated bunching and energizing standing wave acceleration structure comprises a cavity structure, a hollow pipeline is arranged in the cavity structure, the inlet end of the hollow pipeline is a bunching gap, and the outlet end of the hollow pipeline is an energizing gap; the voltage of the beam bunching gap is lower than that of the energy increasing gap, so that beam bunching and large-amplitude energy increasing of the beam with relatively low energy can be realized at the same time; according to the integrated bunching and energizing standing wave acceleration structure, bunching and acceleration, namely energizing, of beam current can be achieved at the same time.

The invention discloses a synchrocyclotron, and relates to the technical field of accelerators, and the synchrocyclotron comprises a particle acceleration space formed in an accelerator body, a particle source placing port formed in the accelerator body, and a particle extraction channel formed in the accelerator body and communicated with the particle acceleration space, along the movement direction of a particle beam in the particle acceleration space, the regenerator is located on the upstream side of the first magnetic field extraction structure, the second magnetic field extraction structure is located on the downstream side of the first magnetic field extraction structure and on the upstream side of the particle extraction channel, and the regenerator is used for driving the particle beam to enter the first magnetic field channel; the first magnetic field lead-out structure is used for deflecting the particle beam track to drive the particle beam to enter the second magnetic field channel; the second magnetic field lead-out structure is used for focusing the particle beam to enable the particle beam to enter the particle lead-out channel through the second magnetic field channel. Therefore, the particle extraction rate can be improved, and compactness and miniaturization of the synchrocyclotron are facilitated.

Provided are a structure for particle acceleration and a charged particle beam apparatus, which enable the suppression of electric field concentration occurring near a negative electrode part. The structure for particle acceleration includes: a ceramic body 1 having a through hole 10 formed by an inner wall surface; and a negative electrode 2 and a positive electrode 3 which are arranged, respectively, on one end and the other end of the through hole 10 in the ceramic body. The inner wall surface of the ceramic body 1 is configured such that a first region 22, which is electrically connected with the negative electrode 2, and a second region 23, which is electrically connected with the positive electrode 3, are electrically connected to each other. The surface resistivity of the first region 22 is lower than the surface resistivity of the second region 23.

The present application relates to the technical field of particle acceleration apparatuses and applications thereof. Disclosed are a radio frequency quadrupole accelerator and a charged particle accelerator system. The quadrupole accelerator comprises an accelerator housing, wherein four long-strip-shaped acceleration electrodes which are symmetrically mounted around a central axis of the accelerator are arranged in the accelerator housing, an acceleration area formed by arranging the four acceleration electrodes opposite each other is provided near the center axis of the accelerator, and a vacuum isolation pipe which is made of a non-metal material and configured to surround the acceleration area to form a vacuum acceleration cavity area is mounted around the acceleration area. In the present application, a non-acceleration area operates under the atmospheric pressure condition, and there is no need to consider the vacuum sealing requirements of the accelerator housing, thereby enabling a light weight and a simplified structure.

This invention relates to the field of particle acceleration technology, and provides a radio frequency quadrupole accelerator for multiple vacuum scenarios. The accelerator includes a radio frequency cavity and a vacuum cover. The cavity wall of the radio frequency cavity has grid holes for evacuation. The vacuum cover is detachably installed at the grid hole location. When the vacuum cover is installed at the grid hole location, it maintains a vacuum environment within the radio frequency cavity in independent vacuum applications. When the vacuum cover is detached from the grid hole location, it places the radio frequency cavity within a vacuum chamber in integrated vacuum applications. This invention, by providing evacuation channels through grid holes in the cavity wall of the radio frequency cavity, eliminates the need for the welded vacuum flange structure of existing radio frequency cavity walls, effectively reducing the lateral dimensions of the radio frequency cavity and thus its volume, enabling miniaturized accelerator design. Furthermore, the grid hole structure effectively reduces the impact of the vacuum channels on the radio frequency performance of the radio frequency cavity.

The invention discloses tail field equipment, and relates to the technical field of particle acceleration, the tail field equipment is used for regulating and diagnosing free electron laser beam flow, and the tail field equipment comprises a vacuum chamber which extends along the beam flow direction and is used for providing a vacuum environment; the inner beam assembly is arranged in the vacuum chamber, the inner beam assembly comprises four groups of corrugated beams which are uniformly distributed in the circumferential direction of the vacuum chamber, the four groups of corrugated beams are symmetrically arranged relative to the center of the axis of the beam, a gap between every two adjacent corrugated beams extends in the radial direction of the vacuum chamber, and the four groups of corrugated beams define a beam channel through which the beam passes; the vacuum chamber is fixedly arranged on the supporting structure; the transmission structure is arranged on the supporting structure, each folded beam is at least provided with a hanging rod, and the transmission structure is in driving connection with the hanging rods so as to drive the four sets of folded beams to synchronously move in the radial direction, and then the distance between the four sets of folded beams is adjusted. According to the technical scheme, the tail field intensity of the tail field equipment is convenient to adjust.

The invention provides a method for measuring the center positioning error of a superconducting magnet framework trunking, and is applied to the technical field of particle acceleration equipment. The method comprises the following steps: acquiring theoretical coordinates and actual coordinates of a plurality of vector points on two opposite surfaces of a wire duct; according to the theoretical coordinates and the actual coordinates, target theoretical coordinates and target actual coordinates of a plurality of center points are determined, and the center points are the center positions between two corresponding vector points in the two opposite faces; determining a first coordinate system according to the theoretical coordinates and the actual coordinates; and based on the first coordinate system, determining the offset of the target theoretical coordinate and the target actual coordinate of the central point, and obtaining a trunking center positioning error.

The application relates to the technical field of particle acceleration, and particularly discloses a high-repetition nanosecond beam pulsing system and method, wherein the high-repetition nanosecond beam pulsing system comprises, in sequence along a beam transmission direction, a direct current ion source, a low-energy beam transmission section, a radio frequency quadrupole field accelerator, a high-energy beam transmission section and a target chamber, adopts a three-stage structure of 'front-end pulsing + middle-stage acceleration + rear-end purification', and is helpful to stably realize high-repetition, nanosecond narrow pulse width output; through pre-chopping and post-bunching, the pulse width is ensured, and invalid particles are reduced to enter a subsequent acceleration channel; the working frequency of the radio frequency chopper is half of the target pulse repetition frequency, the difficulty of synchronous control can be reduced, time sequence accuracy and phase synchronization can be ensured, beam loss and phase disorder can be avoided, pulse time sequence consistency can be ensured, and beam utilization rate can be improved; and the high-repetition nanosecond beam pulsing is stably ensured.

The invention relates to the technical field of particle acceleration, in particular to a stripping film rotating device and a double-beam distribution system. The stripping film rotating device comprises a box body, a rotating disc and a driving mechanism, the box body is provided with a vacuum chamber, the rotating disc is arranged in the vacuum chamber and rotationally connected with the vacuum box body, the rotating disc is provided with a mounting hole and a through hole, the mounting hole and the through hole are arranged in the radial direction of the rotating disc, and a stripping film is mounted in the mounting hole. The vacuum box body is provided with a first beam pipeline and a second beam pipeline which are communicated with the vacuum chamber, the first beam pipeline and the second beam pipeline are arranged on the two axial sides of the rotating disc respectively, and the first beam pipeline and the second beam pipeline directly face the mounting hole; the distance between the mounting hole and the circle center of the rotating disc is equal to the distance between the through hole and the circle center of the rotating disc, and the rotating disc is arranged at the output end of the driving mechanism which is used for driving the rotating disc to rotate. The stripping film rotating device is simple in structure and small in occupied space, and the production cost and the use cost are reduced.

The present application relates to the technical field of particle acceleration, in particular to a neutron radiation detection device based on a superconducting quantum interferometer and a particle accelerator, the neutron radiation detection device comprising a neutron conversion mechanism, a magnetic flux coupling mechanism and a superconducting quantum interferometer arranged in sequence, the magnetic flux coupling mechanism comprising a superconducting induction coil adjacent to the neutron conversion mechanism and a magnetic flux concentrator adjacent to the superconducting quantum interferometer, so as to utilize the ultrahigh sensitivity of the superconducting quantum interferometer to the magnetic signal of the order of picotesla, combine the neutron conversion mechanism and the magnetic flux coupling mechanism, and construct an efficient conversion link of "neutron-charged particle-magnetic flux-electrical signal", wherein the superconducting quantum interferometer greatly improves the neutron radiation detection sensitivity, realizes accurate detection of neutron radiation, and is further provided with a signal processing mechanism connected with the electrical signal of the superconducting quantum interferometer, so as to realize real-time monitoring of the neutron flux change and provide early warning for the safety of nuclear facilities.

The invention discloses a metamaterial resonant cavity and an accelerator beam flow intensity measuring device and method, and relates to the field of particle acceleration equipment, the metamaterial resonant cavity comprises an insulator and an electrode body formed by a substrate and a metamaterial unit array arranged on the substrate; the electrode body is disposed in the cavity, and the insulator is disposed between the electrode body and the cavity. The metamaterial resonant cavity provided by the invention can greatly improve the signal-to-noise ratio of a signal, is applied to beam current intensity measurement, and aims to overcome the contradiction between the sensitivity and the time resolution of a traditional non-interception type measurement method so as to thoroughly solve the problems of the acceleration and the time resolution of an accelerator. And particularly, the problem of real-time accurate monitoring in a low-flow-intensity and short-pulse beam device is solved.

A cyclotron includes a particle acceleration chamber, an upper part above the particle acceleration chamber and a lower part below the particle acceleration chamber, a plurality of rotatable pieces for generating a magnetic field in the particle acceleration chamber, wherein: at least one of the rotatable pieces is at least partly made of a permanent magnet material, the at least one of the rotatable pieces extends along a respective axis, the at least one of the rotatable pieces is rotatable about the respective axis between a plurality of angular positions, the at least one of the rotatable pieces has a plurality of cross sections. A first of the cross sections closer to the central axis of the cyclotron is smaller than a second of the cross sections farther from the central axis of the cyclotron.

The invention relates to the technical field of particle acceleration, in particular to a neutron radiation detection device based on a superconducting quantum interferometer and a particle accelerator, and the neutron radiation detection device comprises a neutron conversion mechanism, a magnetic flux coupling mechanism and the superconducting quantum interferometer which are sequentially arranged, the magnetic flux coupling mechanism comprises a superconducting induction coil adjacent to the neutron conversion mechanism and a magnetic flux aggregator adjacent to the superconducting quantum interferometer, so that the neutron conversion mechanism and the magnetic flux coupling mechanism are combined by utilizing the ultrahigh sensitivity of the superconducting quantum interferometer to a Picesla magnitude magnetic signal; an efficient conversion link of neutron-charged particle-magnetic flux-electric signal is constructed, the superconducting quantum interferometer greatly improves the neutron radiation detection sensitivity and achieves accurate detection of neutron radiation, and a signal processing mechanism is further arranged to be connected with the superconducting quantum interferometer through an electric signal, so that the neutron flux change is monitored in real time. And early warning is provided for nuclear facility safety.

The application discloses a quasi-monochromatic proton beam generation method based on a picosecond laser driven CH target, and comprises the following steps: a linearly polarized Gaussian laser with a long pulse is shot into a plasma CH target with a density gradient converter, the linearly polarized Gaussian laser and the plasma CH target continuously interact with each other, and then a long-time annular magnetic field is formed by the current formed by accelerated electrons and the electron backflow; an electric field generated by the annular magnetic field accelerates various particles to different degrees, separates the particles, and makes the protons in the negative gradient of the acceleration electric field, so that the protons are accumulated in the phase space, and a quasi-monochromatic proton beam is obtained. The application is applied to the field of particle acceleration, can generate a quasi-monochromatic proton beam with high energy and low energy dispersion, has low requirements on laser intensity, has a certain robustness, and has high energy, good monochromaticity and low energy dispersion (as low as 3.1%) of the obtained proton beam.

This application discloses a radio frequency quadrupole accelerator and charged particle accelerator system, relating to the field of particle acceleration equipment and its application technology. The quadrupole accelerator includes an accelerator housing containing four elongated accelerating electrodes symmetrically mounted around the accelerator's central axis. Near the accelerator's central axis, an accelerating zone is formed by the four accelerating electrodes facing each other. A vacuum isolation pipe composed of a non-metallic material is installed around the accelerating zone to enclose the accelerating zone and form a vacuum accelerating cavity. The non-accelerating zone of this application operates under atmospheric pressure, eliminating the need for vacuum sealing requirements for the accelerator housing, allowing for lightweight and simplified structure.