479results about "Linear accelerators" patented technology

The invention discloses an accelerator parameter optimization allocation method based on digital twinning, which relates to the technical field of accelerators, and comprises the following steps: installing at least one beam position detector with a strip-shaped structure along a linear accelerator, and measuring the orbit change of a particle beam along the accelerator; describing the motion state of the particles in a two-dimensional phase space by adopting a two-dimensional vector; analyzing an element off-axis of the linear accelerator and a beam off-axis caused by a stray magnetic field; calculating the amplitude and phase change caused by the cavity coupler on the transverse plane; judging whether the position of the output particle flow exceeds a preset threshold range or not; using a one-to-one correction method to optimize the syndrome to reduce the beam off-axis at the beam position detector with the maximum beam off-axis change; sequentially optimizing all correctors at the upstream by using an overall orbit correction method; the particle beams coming out of the accelerating tube are transmitted along a direction close to the central axis. The orbit of the beam in the accelerator is strictly controlled by optimizing the parameters of the corrector in the accelerator.

The invention discloses a movable low-temperature collimator. The movable low-temperature collimator comprises an outer Dewar; the cold shield is mounted in the outer Dewar; the low-temperature vacuum cavity is installed in the cold shield, and the cold shield is used for shielding heat radiation of the outer Dewar to the low-temperature vacuum cavity; the heat insulation corrugated pipe cavity is installed in the outer Dewar, one end of the heat insulation corrugated pipe cavity penetrates through the end of the outer Dewar and then is connected with the normal-temperature vacuum pump chamber assembly, the other end of the heat insulation corrugated pipe cavity is connected with the low-temperature vacuum cavity, and the heat insulation corrugated pipe cavity is used for reducing heat conduction of the normal-temperature vacuum pump chamber assembly to the low-temperature vacuum cavity; the collimator target head is fixed through the outer Dewar and installed in the low-temperature vacuum cavity, and the collimator target head can move in the radial direction of the low-temperature vacuum cavity and absorb the high-energy ions so as to maintain the high vacuum degree of the low-temperature vacuum cavity. The device can be used for inhibiting the dynamic vacuum effect of a high-current heavy ion beam in a heavy ion superconducting synchronous ring, and the phenomena of ion loss, magnet quenching and vacuum degree avalanche caused by the dynamic vacuum effect are avoided.

A solid-state power source system based on a standardized design specification, and a use method therefor. The system comprises a cabinet (1), driver stages, distributors (2), power amplifier plug-ins (3), synthesizers (4), liquid cooling systems (5), a DC power source (6) and a control system (8), wherein several layers (11) are provided in the cabinet (1), and a corresponding driver stage, distributor (2), power amplifier plug-in (3), synthesizer (4) and liquid cooling system (5) are arranged in each layer (11); the DC power source (6) and the control system (8) are further arranged in the cabinet (1); an input end of the driver stage is connected to a signal output port, an output end of the driver stage is connected to an input end of the corresponding distributor (2), each output end of the distributor (2) is connected to an input end of the corresponding synthesizer (4) by means of the corresponding power amplifier plug-in (3), and an output end of the synthesizer (4) is connected to the control system (8); and each driver stage and power amplifier plug-in (3) are connected to the DC power source (6), the liquid cooling system (5) and the control system (8). The solid-state power source system can be widely applied to the field of accelerators.

The invention relates to a closed circulation 226Ra solution target system for producing 225Ac. The closed circulation 226Ra solution target system comprises a solution type 226Ra target, an isotope target bin, a valve, a 226Ra solution circulation structure, a radium actinide separation structure, a radium lead separation structure, a photon detection system I, a photon detection system II, a heat exchange system, a pressure reduction radon evaporator and a radon treatment system, and the solution type 226Ra target comprises a solution circulation pipeline and a radium-containing solution. The radium-containing solution is contained in the closed solution circulating pipeline; the solution circulating pipeline comprises a main loop pipeline and two branch pipelines; the photon detection system I, the 226Ra solution circulation structure, the pressure reduction radon evaporator, the heat exchange system, the valve and the photon detection system II are sequentially arranged on the main loop pipeline; and the radium actinide separation structure and the radium lead separation structure are respectively arranged on the two branch pipelines. The system can improve the preparation efficiency and yield of 225Ac.

An ion implanter includes a high energy multi-stage linear acceleration unit including a plurality of linear acceleration units, wherein each of the linear acceleration units includes high frequency accelerators respectively in a plurality of stages; and a control device controlling an operation of the high energy multi-stage linear acceleration unit in accordance with a data set defining a voltage amplitude, a frequency, and a phase of the high frequency accelerator in each of the plurality of stages.

One ECR ion source generates a He < 2 + > ion beam, the other ECR ion source generates a H2 < + > ion beam, the He < 2 + > or H2 < + > ion beam is selected by a deflection magnet and then transmitted and focused by LEBT to enter an RFQ, the focusing factor of the RFQ is increased and then reduced, DTL is IH-DTL designed by adopting KONUS beam dynamics and comprises two KONUS periods, the working frequencies of the RFQ and the DTL are respectively 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, 425MHz, after He < 2 + > or H2 < + > ion beams are accelerated by RFQ and DTL, the MEBT distributes and transmits the ion beams to a downstream accelerator and an isotope production device. According to the proton helium ion implanter provided by the invention, the particle beam can meet the injection requirement of a subsequent synchrotron, the miniaturization of the proton helium ion implanter is realized, and the production of medical isotopes is considered.

A method for constructing a photon source model function of a medical linear accelerator, for calculating the dose of rays in a radiation therapy scheme is disclosed. A source model of a therapeutic photon beam of the accelerator includes a primary ray photon source model and a scattered ray photon source model. Physical parameters in the two parts of source model functions include the position coordinates of an emission point of a particle, a projection value of a unit momentum vector in a three-dimensional orthogonal direction, and the energy of the particle. By utilizing the model functions, photon fluence information, energy spectrum information, and unit momentum direction information of photons on any phase space plane can be accurately calculated. The method and thought for constructing the source model are applicable to construction of source models of photon beams with various nominal energies of the accelerator used in a radiation therapy.

The present relates to device for ultra-high dose rate radiation treatment to a patient, comprising: —a radiation source for providing a radiation beam, and—a linear accelerator for accelerating said radiation beam until a predetermined energy, and—a beam delivery module for delivery the accelerated radiation beam. The device is arranged for generating an accelerated radiation beam having a predetermined energy between about 50 MeV and about 250 MeV, to deliver rate radiation dose of at least 10 Gy, during an overall time less than about 200 ms in order to generate a radiation field for treating a target volume of at least about 30 cm3, with said ultra-high dose rate radiation dose and / or a target volume located at least about 5 cm deep in the tissue of the patient with said ultra-high dose rate radiation dose.

The present invention relates to a device-produced medical isotope 225 Photonuclear reaction preparation in Ac production technology 225 Ac radium target design, specifically involving a method for producing 225 Ac's 226 Ra isotope target and its application. 226 The Ra isotope target comprises a nickel substrate, 226 Ra isotope sample, nickel electroplating layer and nickel protective shell; wherein, 226 The Ra isotope sample is evenly concentrated in the center of the nickel substrate, and the nickel electroplating layer covers 226 The outer surface of the Ra isotope sample, and the nickel substrate and nickel electroplating layer will 226 The Ra isotope sample is wrapped in the middle; the nickel protective shell wraps the nickel electroplating layer. 226 Ra isotope targets can be used in electron linear accelerators as a photonuclear reaction production 225 Ac raw material target, can improve 225 Production of Ac isotopes.

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 present disclosure relates to an electron beam output device for medical use, and the electron beam output device may comprise: an electron beam generation unit for generating an electron beam in the form of a pencil beam; an electron beam acceleration unit that receives the electron beam generated by the electron beam generation unit and accelerates the received electron beam; a conduit for allowing the electron beam received from the electron beam acceleration unit to pass through and be disposed opposite to a target site or enter an internal passage of the target site; and a first magnetic field generation unit that is provided in the conduit and generates a magnetic field that refracts the electron beam output from the conduit.

A ray generating device and a control method thereof are provided. The ray generating device includes: an electronic beam generating device; a microwave generating device; a microwave circulator, having a power input port and at least two power output ports, the power input port being connected to the microwave generating device; a plurality of accelerating tubes respectively connected to at least two power output ports, configured to respectively receive a plurality of electronic beams, and accelerate electronic beams respectively through microwaves received from the at least two power output ports, and to respectively generate a plurality of rays having at least two different energies; and a controller, configured to perform chronological control on microwave power of the microwave generating device, and chronological control on beam loadings of the electronic beams generated by the electronic beam generating device and respectively corresponding to accelerating tubes.

Embodiments of systems, devices, and methods relate to initiating beam transport for an accelerator system. An example method includes increasing a bias voltage of one or more electrodes of the accelerator system to a first voltage level and extracting a charged particle beam from a beam source such that the beam is transported through the accelerator system. The beam has a beam current at a first beam current level that results in a first transient voltage drop of the accelerator system within a threshold. The method further includes increasing the beam current at a rate that results in one or more subsequent transient voltage drops of the accelerator system until the accelerator system has reached nominal conditions. The one or more subsequent transient voltage drops are within the threshold. Another example method includes biasing one or more electrodes of an accelerator system to a voltage level and selectively extracting, according to a duty cycle function, a charged particle beam from a beam source such that the charged particle beam is transported through the accelerator system. The duty cycle function can be linear or non-linear and can include a frequency f. The duty cycle function can include a variable pulse duration such that the variable pulse duration increases over time with each selective extraction of the charged particle beam.

The invention relates to a low-pressure ionization chamber, a design method and a medical linear accelerator, and belongs to the technical field of radiotherapy dose monitoring, the low-pressure ionization chamber comprises a shell, a closed cavity is formed in the shell, a low-pressure environment lower than standard atmospheric pressure is formed in the closed cavity, and the ion recombination ratio of positive and negative charges is not larger than 0.01; according to the invention, the technical problem in the prior art that the monitoring result is inaccurate under the ultrahigh dose rate due to the influence of ion recombination on the penetration type air ionization chamber can be solved.

Disclosed herein is a waveguide cell having a helical cavity. The waveguide cell has a central axis and a cavity having a transverse cross section whose rotational position about the central axis varies along the central axis. There is also disclosed a method a determining the shape of a waveguide cell.

The present invention relates to a production 225 Closed cycle of Ac 226 Ra solution target system. The closed cycle 226 Ra solution target system includes solution type 226 Ra target, isotope target chamber, valve, 226 Ra solution circulation structure, radium-actinium separation structure, radium-lead separation structure, photon detection system I, photon detection system II, heat exchange system, vacuum radon evaporator and radon treatment system, among which, solution type 226 The Ra target includes a solution circulation pipeline and a radium-containing solution, and the radium-containing solution is contained in a closed solution circulation pipeline; the solution circulation pipeline includes a main loop pipeline and two branch pipelines; the photon detection system I, 226 The Ra solution circulation structure, vacuum radon evaporator, heat exchange system, valve and photon detection system II are sequentially arranged on the main loop pipeline; the radium-actinium separation structure and the radium-lead separation structure are respectively arranged on the two branch pipelines. 225 Preparation efficiency and yield of Ac.

The invention belongs to the field of particle accelerator microwaves, and particularly relates to a C-band compact spherical microwave pulse compression device which comprises a shell, a dual-polarization mode coupler and a circular waveguide, a spherical energy storage cavity is formed in the shell, and the circular waveguide and the spherical energy storage cavity are communicated through a coupling hole; the dual-polarization mode coupler comprises a rectangular waveguide, a butterfly-shaped matching section and a cylindrical matching section. According to the klystron radio frequency pulse compression circuit, the radio frequency pulse with the pulse width of 2.5 microseconds of the klystron can be compressed to 300ns, the average power gain in a single pulse is more than 4 times, the peak power gain is 6.3 times, and the compression efficiency is about 54%. According to the dual-polarization mode coupler, the functions of power distribution, mode conversion and polarization mode generation are synchronously realized, a TE10 mode in a rectangular waveguide is converted into two polarization TE11 modes which are equal in amplitude and orthogonal in phase, and then the two orthogonal TE114 modes are excited in a spherical energy storage cavity.

The invention provides a multi-leaf grating assembly, radiotherapy equipment and a blade locking method. The multi-leaf grating assembly comprises a frame and at least two grating blades arranged at intervals. Each grating blade is in sliding connection relative to the frame and can slide along a first direction; the device further comprises a driving device and a locking piece connected with the driving device. When the grating blade slides into the initial position in the frame, the driving device can drive the locking piece to abut against the grating blade in the second direction, and the grating blade abuts against the frame. The first direction and the second direction are perpendicular to the thickness direction of the grating blade, and the first direction and the second direction are not parallel. The driving device can drive the locking piece to abut against the grating blade so that the grating blade can abut against the frame, and therefore the grating blade is fixed through friction force between the grating blade and the frame and friction force between the grating blade and the locking piece. Therefore, mechanical collision of grating blades or weakening of mechanical collision strength in acceleration and deceleration stages of high-speed rotation of the multi-leaf grating assembly is avoided.

The invention relates to the design of a radium target for preparing 225Ac through a photo-nuclear reaction in the technical field of production of a mechanical produced medical isotope 225Ac, in particular to a 226Ra isotope target for producing 225Ac and application of the 226Ra isotope target. The 226Ra isotope target comprises a nickel substrate, a 226Ra isotope sample, a nickel electroplated layer and a nickel protective shell; wherein the 226Ra isotope samples are uniformly concentrated at the central position of the nickel substrate, the nickel electroplated layer covers the outer surfaces of the 226Ra isotope samples, and the nickel substrate and the nickel electroplated layer wrap the 226Ra isotope samples in the middle; and the nickel protective shell wraps the nickel electroplated layer. The 226Ra isotope target can be applied to an electron linear accelerator and can be used as a raw material target for producing 225Ac through a photo-nuclear reaction, and the production quantity of the 225Ac isotope can be increased.

The invention relates to the technical field of heavy ion accelerators, in particular to a high-precision assembling device and method for a superconducting multi-pole combined magnet. The assembling device comprises a double-layer three-dimensional adjustable support used for adjusting the superconducting multi-pole magnets so that the adjacent superconducting multi-pole magnets can be accurately aligned; the superconducting multi-pole magnet butt joint tool is used for adjusting the axial angles of the superconducting multi-pole magnets and connecting the adjacent superconducting multi-pole magnets to form a superconducting multi-pole combined magnet; and the center shaft leading-out tool is used for converting the virtual center of the inner cavity of the superconducting multi-pole magnet into a solid center shaft. According to the invention, the double-layer three-dimensional adjustable bracket can be used for positioning the bracket position so as to adjust the position collimation of each group of superconducting multi-pole magnets; according to the superconducting multi-pole magnet butt joint tool, the axial angle of each group of superconducting multi-pole magnets can be adjusted with high precision; the center shaft leading-out tool can be used for converting the virtual center of the inner cavity of each superconducting multi-pole magnet into an entity center shaft so as to realize concentricity collimation of multiple groups of superconducting multi-pole magnets.

The utility model discloses a miniaturized beam unit module, and belongs to the technical field of electron linear accelerators. A miniaturized beam unit module comprises a magnetron assembly, a microwave system, a circulator assembly, an accelerating tube assembly, a primary collimating cone assembly and a fixed bottom plate. The magnetron assembly, the microwave system, the circulator assembly, the accelerating tube assembly and the primary collimating cone assembly are fixedly mounted on the fixed bottom plate; the magnetron assembly comprises a magnetron, and the magnetron is used for generating microwaves; the accelerating tube assembly comprises an accelerating tube; the microwave system is used for connecting the magnetron and the accelerating tube and feeding microwaves generated by the magnetron into the accelerating tube; the circulator assembly comprises a circulator, a waveguide port of the circulator is higher than a waveguide port of the magnetron, the circulator is arranged in the microwave system, and the circulator is used for isolating microwave power fed back to the magnetron; the position of the magnetron is moved downwards, so that the height of the waveguide port of the magnetron is lower than that of the waveguide port of the four-end circulator, and the purpose of miniaturization of the beam unit module is achieved.

The invention provides a cooling system of a coupling type linear acceleration device, which comprises a coupling piece and two accelerators, the two accelerators are coupled and connected by the coupling piece to form the coupling type linear acceleration device, and the coupling piece and the accelerators are internally provided with cooling channels for a cooling medium to flow; the cooling channel is connected with an external cooling medium conveying device; according to the characteristics of the coupling type linear acceleration device, the coupling piece and the accelerator are independently cooled, so that the temperature rise, deformation and frequency drift of the coupling type linear acceleration device are controlled within a controllable range, and the operation stability of the coupling type linear acceleration device is guaranteed.

The invention belongs to the technical field of linear accelerator optimization, and particularly relates to a linear accelerator beam optimization method, which comprises the following steps of: constructing a linear accelerator simulation model based on parameters, appearance and power of a linear accelerator, simulating various linear accelerators by adopting the linear accelerator simulation model, and optimizing the beam of the linear accelerator based on a display screen and a controller. Displaying and adjusting parameters in the simulated linear accelerator; through the cooperation of the above structures, the parameter and beam comparison table is generated, the beam condition of the linear accelerator is optimized and the beam state of the linear accelerator is adjusted based on the data on the parameter and beam comparison table, so that beam optimization of the linear accelerator is completed, and the linear accelerator simulation model is utilized to simulate the non-standard linear accelerator. Parameters in the non-standard linear accelerator and the beam state are compared and stored, so that the linear accelerator simulation model can simulate linear accelerators of different models.

The present invention relates to the field of accelerator technology, and in particular to an RFQ water supply system that is convenient for real-time monitoring and maintenance; the water supply system comprises a mounting bracket, a water circulation system and a real-time monitoring system, the mounting bracket is mounted above the RFQ accelerator cavity, and the water circulation system and the real-time monitoring system are mounted on the mounting bracket; the water supply system is structurally separated from the cavity, the water supply system is completely located above the cavity, and there is a large gap between the water supply system and the cavity except for the hose connection, so that the structure is more compact, the influence of the vibration of the water system on the cavity is greatly reduced, and it is convenient for workers to operate and maintain; the water system not only solves the cooling of the RFQ accelerator cavity and auxiliary equipment, but also plays a role in cavity field tuning; the acquisition terminal of all water flow switch signals adopts a point-surface-line method to completely solve data acquisition and signal return, and the advantage of this data acquisition method is that a control cabinet is omitted, so that the control method is light and easy to implement.

An ion implantation system including an ion source for generating an ion beam, an end station for holding a substrate to be implanted by the ion beam, and a linear accelerator disposed between the ion source and the end station and adapted to accelerate the ion beam, the linear accelerator including a beam tube for transmitting the ion beam, the beam tube having at least five adjoining sidewalls, at least one resonator coupled to the beam tube, and at least one turbomolecular pump coupled to the beam tube, wherein at least one of the at least five adjoining sidewalls of the beam tube has an opening formed therein for providing access to an interior of the beam tube.

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 present invention provides a radionuclide production system, a radionuclide production method, and an accelerator system with which a beam profile of radiation irradiated on a target can be monitored in real time using a destructive monitor, and with which appropriate irradiation on the target can be carried out according to the beam profile. The radionuclide production system comprises: an accelerator that accelerates charged particles; and a target that produces a radionuclide by nuclear reaction upon being irradiated with an accelerated charged particle beam or radiation generated by a charged particle beam. The radionuclide production system further comprises, behind targets (T205, T207) in the direction of advancement of the charged particle beam, destructive monitors (T206, T209) which are detectors for detecting radiation and which interact with the radiation. On the basis of a spatial distribution of intensity of the charged particle beam or radiation measured by the destructive monitors, the radionuclide production method produces a radionuclide while determining, as a beam profile at positions of the targets, at least one of a spatial distribution of intensity, a position of a beam center, and a beam spread.

A linear accelerator is provided. The linear accelerator includes a plurality of cells. Each cell includes an outer ring comprising a first material; an inner ring, comprising a second material, and at least one end plate in physical contact with the outer ring and the inner ring and having beam aperture therethrough. The first material is substantially electrically conductive and the second material is substantially not electrically conductive. The inner ring is centered within the outer ring. The beam aperture of each cell of the plurality of cells are aligned to define a beam path.

The invention discloses a quality control method based on a medical linear accelerator, and the method comprises the following steps: S1, data collection: periodically collecting multi-source built-in parameters from the medical linear accelerator, the multi-source built-in parameters comprising beam performance parameters, mechanical performance parameters and subsystem state parameters; s2, an intelligent analysis step: performing intelligent analysis on the multi-source built-in parameters acquired in the step S1, including S2.1, a dynamic baseline comparison step; s2.2, a trend prediction step; s2.3, a root cause analysis step; and S3, a decision feedback step: generating and outputting quality control decision information according to a result of the intelligent analysis step. The quality control method based on the medical linear accelerator aims to realize predictive early warning, intelligent root cause analysis and adaptive threshold management, so that the perspectiveness, the accuracy and the automation level of quality control are improved. The invention further discloses a quality control system based on the medical linear accelerator, a storage medium and a device.

A particle accelerator includes an acceleration cavity chain and at least one energy switch side cavity. The energy switch side cavity is communicated with two adjacent main cavities in the acceleration cavity chain through coupling openings respectively. The energy switch side cavity includes a pair of asymmetric side cavity noses arranged therein and an energy switch probe arranged at a top position thereof. The energy switch probe is configured to extend from the top position of the energy switch side cavity to a space between the pair of side cavity noses.