22 results about "Quadrupole magnet" patented technology

The present application belongs to the technical field of high-end medical equipment. Disclosed are a multi-room particle therapy room, a radiotherapy system, and a particle accelerator movement method. The multi-room particle therapy room comprises a plurality of treatment rooms. The radiotherapy system comprises the multi-room particle therapy room and a particle accelerator. Each treatment room is provided with a beam window. The particle accelerator can move outside different treatment rooms and is aligned with the beam windows. The particle accelerator directs particle beams into the treatment rooms by means of the beam windows. The particle beams perform radiotherapy by means of therapy heads in the treatment rooms. The radiotherapy system is not provided with a dipole magnet or a quadrupole magnet. The plurality of treatment rooms share one particle accelerator. The particle accelerator is moved to the outside of the treatment room requiring the particle beam, and the particle beam is directed into the treatment room by means of the beam window. When the treatment in the treatment room is completed, the particle accelerator is moved to other treatment rooms requiring the particle beams and performs treatment work, thereby reducing the overall cost of the radiotherapy system and making proton therapy accessible.

A single-circle injection system for a heavy ion synchrotron cancer treatment device comprises a cutting magnet, a focusing quadrupole magnet, a deflection electrode and an impact magnet, the cutting magnet, the deflection electrode and the impact magnet are all arranged on the two sides of the focusing quadrupole magnet on a synchrotron main ring track, the cutting magnet is located on one side, and the deflection electrode is located on the other side. The deflection electrode and the impact magnet are located on the other side, are directly installed on a main ring track of the synchrotron and are arranged at the positions where an injection beam is about to intersect with a closed track of the synchrotron. And the deflection electrode and the impact magnet are used for compensating the residual angle deviation, so that the beam current is completely matched with the main ring track. The invention has the advantages of high-efficiency beam transmission, simplified structure, reduced cost and flexible energy switching.

The invention provides a standing wave acceleration structure and an acceleration device. The standing wave acceleration structure comprises a light velocity section and a bunching section. The light velocity section comprises a plurality of light velocity cavities which are distributed in the axial direction of the light velocity section and are sequentially communicated. The bunching section comprises a bunching cavity and an entrance port, the bunching section is arranged at the upstream of the light velocity section along the electron beam direction, the entrance port is communicated with the bunching cavity, and the bunching cavity is communicated with the light velocity cavity at the most upstream. Wherein an accelerating electric field in the axial direction of the light velocity section is formed in the light velocity cavity, the phase of electrons entering the light velocity cavity is ahead of the maximum accelerating phase of the accelerating electric field, and the phase of the electrons after acceleration does not exceed the phase corresponding to the maximum value of the electric field intensity of the accelerating electric field. According to the acceleration structure provided by the embodiment of the invention, the energy dispersion of the electron beam can be reduced by adopting a sliding phase method, so that a smaller focus size can be obtained during subsequent quadrupole magnet focusing, the spatial resolution of the acceleration device is improved, and a better effect is achieved during fine defect detection.

The application relates to an arc-shaped superconducting magnet system for proton acceleration, which comprises an arc-shaped superconducting magnet, an ultralow-temperature system and a magnet suspension system, wherein the arc-shaped superconducting magnet comprises a dipole magnet, two quadrupole magnets and a magnet fastening structure; the ultralow-temperature system comprises a vacuum container, a cold shield structure, a liquid helium container, a gas return pipe, a refrigerating unit and a cold conducting structure; the magnet suspension system comprises a liquid helium container pull rod assembly and a cold shield structure pull rod assembly; the arc-shaped superconducting magnet provides a magnetic field required by proton acceleration, the ultralow-temperature system is used for providing a stable ultralow-temperature environment for the superconducting magnet, and the magnet suspension system keeps the arc-shaped superconducting magnet in a stable spatial physical position; the three are combined to form a complete arc-shaped superconducting magnet system suitable for proton acceleration; the application has the advantages of small volume, light mass, low operation cost, safer radiation protection and the like.

The invention provides a tandem double-target-chamber irradiation device, and belongs to the technical field of application of particle accelerators. The device comprises a differential section vacuum cavity, a first irradiation target chamber and a second irradiation target chamber which are connected in sequence. And a first quadrupole magnet, a second quadrupole magnet and an octupole magnet are arranged in the differential section vacuum cavity and are respectively used for defocusing, focusing and homogenizing beam flow. The first irradiation target chamber is provided with a liftable target frame and is isolated from the second irradiation target chamber through a gate valve. The device is configured to automatically switch beam modes under the condition of maintaining high vacuum by controlling starting and stopping of the magnet, lifting of the target material frame and opening and closing of the valve, and samples in the two target chambers are subjected to continuous irradiation with high and low particle number densities in sequence. The device has the advantages of high precision, high cleanliness, high efficiency, compact structure and low cost.

The invention relates to the technical field of simulation design, and particularly discloses a simulation design method of a four-side focusing magnetic field power supply, which comprises the following steps of: receiving a current current instruction and electrical parameters of a quadrupole magnet, the electrical parameters comprising an inductance value and a resistance value; constructing an electrical parameter deviation table, wherein the electrical parameter deviation table is used for storing electrical parameter deviations in different current change scenes; matching a corresponding electrical parameter deviation C from an electrical parameter deviation table according to the change direction and amplitude of the current instruction; the current current instruction is corrected according to the electrical parameter deviation C, a target instruction is obtained, and the target instruction is used for driving simulation operation of the four-side focusing magnetic field power supply. By constructing the electrical parameter deviation table and matching and correcting the current instruction in real time, the simulation model dynamically reflects the hysteresis effect, and the simulation precision and stability of the four-side focusing magnetic field power supply are remarkably improved.

The application relates to the technical field of particle accelerators, and particularly discloses a double-beam deflection type quadrupole magnet device which comprises a control circuit, an iron core, four groups of pole heads and two beam pipes; the four groups of pole heads are fixedly arranged in the iron core and are distributed in a rectangular shape; the control circuit is electrically connected with the four groups of pole heads, and the control circuit is used for changing the current size to adjust the magnetic field intensity of two groups of pole heads adjacent in the vertical direction; the polarities of the two groups of pole heads adjacent in the vertical direction are opposite, and the polarities of two groups of pole heads adjacent in the horizontal direction are opposite; one beam pipe is arranged between the two groups of pole heads adjacent in the vertical direction; the other beam pipe is arranged between the other two groups of pole heads adjacent in the vertical direction; the double-beam deflection type quadrupole magnet device can solve the problem that scientific research and production have a great demand for high-current beam, and the beam does not need to pass through the vacuum chamber excessively when being combined, and the structure is simple.

The application relates to a method for realizing beam expansion and divergence angle compression by a quadrupole magnet and a solenoid, which is used for controlling high-energy electron beams generated by an accelerator, eliminating the influence of the Coulomb force of the electron beams and weakening the divergence angle of the electron beams. The method realizes electron beam expansion and primary compression of the divergence angle by four fixed permanent quadrupole magnetic rings and one electric quadrupole magnetic ring, and realizes ultimate compression of the beam divergence angle by one composite solenoid electromagnet. The electron beam radius is expanded from the millimeter level to the centimeter level in a very short distance, the influence of the Coulomb force is reduced by 1-2 orders of magnitude, and the increment of the divergence angle is controlled in the 0.01 mrad level. The initial divergence angle of the electron beam is compressed from the 1 mrad level to the 0.1 mrad level, and theoretically, the beam spot can be compressed from the meter level to the 10 cm level when the electron beam is transmitted for 1 km, so that the transmission distance of the electron beam is greatly increased.

The invention relates to a quadrupole magnet magnetic field harmonic measuring coil and measuring equipment. The quadrupole magnet magnetic field harmonic measuring coil mainly comprises a coil framework, the length of the coil framework is larger than that of a central channel of a quadrupole magnet, mounting grooves are symmetrically formed in the coil framework in the axis direction, and inner winding grooves used for arranging inner coils are formed in the sides, close to a central shaft, of the mounting grooves in the axis direction; the inlaid strip is arranged in the mounting groove, an outer winding groove used for arranging an outer coil is formed in the side, away from the central shaft, of the inlaid strip in the axis direction, and the center of the outer winding groove, the center of the inner winding groove and the central shaft are located on the same plane; and the driving shaft is arranged at one end of the coil framework and is used for being connected with an external driving part. According to the invention, rapid and accurate measurement of the quadrupole magnet magnetic field harmonic waves can be completed.

Various embodiments include a charged particle beam management and control system for manipulating and controlling a beam of charged particles output from an accelerator to roughly match the size and shape of an irradiation target. Various embodiments achieve dynamic and flexible control of the beam shape at the target by using two octupole magnets in combination with a system of quadrupole magnets that shape the beam before entering each of the two octupole magnets. The magnetic fields of the quadrupole magnets are dynamically controlled by a computer processing system that receives information from beam sensors at or near the target to maintain beam shape and spread at the target. The system allows for the creation and maintenance of a uniform and square or rectangular beam profile at the target, suitable for applications such as isotope production and irradiation. The system is adaptable to different beam types, sizes, and shapes.

The invention discloses a method for improving the magnetic field quality of a pure permanent magnet multi-pole magnet of a particle accelerator. The method comprises the following steps: 1) selecting a double-ring permanent magnet quadrupole magnet based on a Halbach array as a pure permanent magnet multipole magnet of the particle accelerator; the double-ring permanent-magnet quadrupole magnet comprises two rotatable Halbach magnet rings which are coaxially arranged inside and outside, and the Halbach magnet rings are marked as an inner ring and an outer ring; each Halbach magnetic ring comprises a plurality of sub-rings which are arranged along the axial direction, and each sub-ring comprises a plurality of permanent magnet blocks which are arranged along the circumference; the position of each permanent magnet block is adjustable in the radial direction; 2) taking the inner ring and the outer ring as to-be-adjusted magnetic rings respectively; measuring initial harmonic data of the current to-be-adjusted magnetic ring by using a magnetic field harmonic measurement system; 3) fitting harmonic data of each order generated when each permanent magnet block in the current to-be-adjusted magnet ring is moved in the radial direction to obtain a relational expression of the radial displacement of the corresponding permanent magnet block and the magnetic field of each order of the permanent magnet block; and 4) searching an optimal magnetic block adjusting scheme by using a genetic algorithm.

The application provides a compact beam switching deflection device and application thereof, and relates to the technical field of ion accelerator equipment. The device comprises a superconducting beam splitter, a multi-channel vacuum chamber and a superconducting combined magnet which are connected in sequence, wherein the superconducting beam splitter is used for splitting the input beam, the multi-channel vacuum chamber is provided with a plurality of outlet flanges, each outlet flange is connected to a branch beam line pipe, and at least one branch beam line pipe is provided with a superconducting combined magnet. The application adopts a superconducting magnet to deflect the beam, improves the maximum field strength of the deflection magnet, reduces the deflection radius of the beam, and thus reduces the floor area. Furthermore, the combined superconducting magnet is adopted to combine the quadrupole field on the dipole field, reduces the use of the quadrupole magnet, and thus further reduces the floor area.

The embodiment of the invention discloses a storage ring beam transverse phase measurement method and a related device, and the method comprises the steps: obtaining beam orbit values collected by a beam position monitor (BPM) in real time and a quadrupole magnet K value provided by an accelerator control system, and the beam orbit values comprise a horizontal beam orbit value and a vertical beam orbit value; the gradient of the beam track value is calculated through a numerical gradient method, the physical track angle value of the beam track is obtained, and the physical track angle value comprises a horizontal beam track angle value and a vertical beam track angle value; constructing an input vector according to the horizontal beam track value, the horizontal beam track angle value, the vertical beam track value, the vertical beam track angle value and the K value; and inputting the input vector into the beam phase prediction model to obtain a transverse phase value at each beam position monitor. According to the embodiment of the invention, the method can achieve the quick and non-invasive transverse phase measurement, and is good in practicality and robustness.

The present invention relates to a medical proton synchrotron, which comprises eight deflection dipole magnets connected in sequence, four long straight sections connected between two deflection dipole magnets, respectively, and four mini straight sections connected between two deflection dipole magnets, respectively, and the straight sections comprise six horizontal defocusing quadrupole magnets and six horizontal focusing quadrupole magnets. According to the medical proton synchrotron of the present invention, the envelope function is controlled in a smaller level, thereby effectively increasing the acceptance of the synchrotron, maintaining a very compact structure, reducing the manufacturing difficulty of the elements, and improving the extraction efficiency.

A particle accelerator system, preferably including an injection beamline, a return beamline, and a merged beamline, and optionally including a beam separator. The particle accelerator system preferably includes a plurality of electron optics elements, such as dipole magnets, quadrupole magnets, solenoid elements, and / or higher-order magnetic elements, which can function to direct electrons (and / or other charged particles) along the beamlines. A method of operation, preferably including injecting electrons, merging beamlines, accelerating the injected electrons, and / or using the accelerated electrons, and optionally including receiving return electrons, dumping used electrons, and / or returning the accelerated electrons.

The invention discloses a superconducting quadrupole magnet development process method, and belongs to the field of superconducting quadrupole magnets, and the superconducting quadrupole magnet comprises an iron core material, a magnetic shielding material, a superconducting wire material, a heat conduction material and an epoxy material; the development process comprises the following steps: S1, pre-assembling the magnet core; s2, measuring a mechanical center by a laser tracker; s3, assembling the left iron core and the right iron core; s4, assembling a coil and a coil box; s5, wire outgoing head wiring and tin soldering are carried out; s6, coil electrical detection; and S7, magnet final assembly. According to the superconducting quadrupole magnet assembled through the development technology, a left-right two-in-one structure and a conduction cooling mode are adopted, so that the magnet can be independently installed and does not need to be installed together with a superconducting high-frequency cavity in an ultra-clean room, the installation process is simplified, and pollution to the superconducting high-frequency cavity is avoided.

A particle accelerator system, preferably including an injection beamline, a return beamline, and a merged beamline, and optionally including a beam separator. The particle accelerator system preferably includes a plurality of electron optics elements, such as dipole magnets, quadrupole magnets, solenoid elements, and / or higher-order magnetic elements, which can function to direct electrons (and / or other charged particles) along the beamlines. A method of operation, preferably including injecting electrons, merging beamlines, accelerating the injected electrons, and / or using the accelerated electrons, and optionally including receiving return electrons, dumping used electrons, and / or returning the accelerated electrons.

The invention discloses a laser acceleration star beam elimination method, device and equipment. The method comprises the following steps: acquiring an initial beam shape of an initial beam distributed at a target position; the initial beam current distribution is beam current distribution after the preset proton beam current passes through the focusing section with the triple electric quadrupole magnet group; determining whether the initial beam shape is distorted to form a star beam; if it is determined that the initial beam shape is distorted to form a star beam, determining a target magnetic field gradient required for adjusting the initial beam shape to a target beam shape by adopting preset beam dynamics simulation software; and adjusting the magnetic field gradient of the triple electric quadrupole magnet group according to the target magnetic field gradient so as to eliminate the star beam and obtain target beam current distribution. According to the embodiment of the invention, elimination of the star-shaped beam of laser acceleration can be quickly realized.

The invention provides a beam homogenization light path structure of a medium-energy electron irradiation accelerator and a collimation correction method. The light path structure sequentially comprises a permanent magnet strong focusing quadrupole magnet group, a permanent magnet uniform beam expanding magnet group and a vacuum diffusion box along the beam transmission direction, the permanent magnet strong focusing quadrupole magnet group is used for focusing and correcting the shape of the initial electron beam spot; the permanent magnet uniform beam expanding magnet group is used for carrying out horizontal beam expanding and density homogenization on the corrected beam spots, and cooperates with the vacuum diffusion box to finally form a rectangular uniform irradiation field in a target area; the permanent magnet strong focusing quadrupole magnet set and the permanent magnet uniform beam expanding magnet set are made of permanent magnet materials, and external power supply is not needed. According to the beam homogenization scheme of the medium-energy electron irradiation accelerator, special-shaped beam spots can be effectively corrected at the same time, a large-size rectangular uniform irradiation field is stably generated, the structure is compact, and engineering implementation is easy.

The invention provides a permanent magnet quadrupole magnet, which is used for an ion accelerator and comprises a permanent magnet assembly, a positioning structure and a shell assembly, the permanent magnet assembly is an annular quadrupole magnet formed by arranging twelve independent fan-shaped permanent magnet blocks in a surrounding mode. The positioning structure comprises a permanent magnet positioning inner cylinder coaxially arranged on the inner side of the annular magnetic ring and a magnet positioning cylinder coaxially arranged on the outer side of the annular magnetic ring in a sleeving mode. The permanent magnet positioning inner cylinder and the magnet positioning cylinder are matched together, and the circumferential directions of the fan-shaped permanent magnets are clamped and fixed from the radial inner side and the radial outer side; the shell assembly comprises a permanent magnet shell and at least one magnet end plate; one end of the permanent magnet positioning inner cylinder is fixedly connected with the magnet end plate, and the magnet end plate is clamped and positioned with the end part of the permanent magnet shell, so that the permanent magnet assembly and the positioning structure are packaged in the permanent magnet shell.

A kind of test system, method and magneto-optical kerr effect criterion method of high-order magneto-optical kerr effect in ferromagnetic film belong to the field of spintronics and magneto-optics. By building a magneto-optical kerr detection light path, the direction of the external magnetic field is regulated by the quadrupole magnet to regulate the magnetic moment direction of the sample, and the light intensity change curve under the rotating magnetic field is detected by the photodetector. Whether the sample has second-order magneto-optical kerr effect (QMOKE) is characterized, and the intensity is quantitatively observed. The method only needs a single light intensity change curve obtained by vertical incidence as the characterization basis of QMOKE, and the measurement method of small step (5°) rotation of external magnetic field comprehensively characterizes the influence of magnetic field direction on QMOKE signal, and can calculate QMOKE intensity according to amplitude, simplifies the steps of separating first-order magneto-optical kerr effect (LMOKE) and QMOKE, and simplifies the characterization criterion of QMOKE effect of ferromagnetic film system, especially Fe structure film.

The utility model relates to the technical field of particle accelerators, in particular to a quadrupole magnet and a particle accelerator, the quadrupole magnet comprises a first frame, a second frame and four independent winding coils wound between the first frame and the second frame, the first frame and the second frame are symmetrically closed frames and are arranged in parallel at intervals, and the first frame and the second frame are parallel to each other. The particle beams are rotationally symmetrical around a particle beam flow channel positioned in the centers of the two frames; each independent winding coil comprises two transverse bending sections and two longitudinal acting sections, an interval space is formed between the two longitudinal acting sections of the same independent winding coil, and at least one longitudinal acting section of the other independent winding coil is arranged in the interval space; and the geometric length of the transverse bending section is expanded by increasing the extension path. Through the rotational symmetric layout of the symmetric closed frame, the extending winding path of the transverse bending section and the collaborative filling design of the multi-coil interval space, the defect of a traditional acute angle bending process is avoided, and meanwhile the limited space is utilized to the maximum extent.