254 results about "Cyclotron" patented technology

The invention discloses a method for improving fusion plasma ion cyclotron heating efficiency, and belongs to the technical field of magnetic confinement fusion. The method comprises coupling use of an ion cyclotron antenna and a helical wave antenna, the ion cyclotron antenna is installed in a Tokamak vacuum chamber, is connected with an external radio frequency power supply through a coaxial line, and is used for exciting an ion cyclotron frequency band electromagnetic wave to heat plasma; and the helical wave antenna is arranged at a Tokamak window adjacent to the ion cyclotron antenna, is connected with a radio frequency power supply through a coaxial line or a rectangular waveguide, and is used for exciting a helical wave to increase the plasma density of a scraping layer and improve the accessibility of the ion cyclotron wave. The plasma is excited through the spiral wave antenna, so that the density of the scraping layer is improved, the coupling efficiency of the ion cyclotron wave and the plasma is improved, and technical support is provided for application of ion cyclotron heating in future high-parameter Tokamak.

The invention relates to the field of cyclotrons, and discloses a cavity electron beam welding device and method for a high-frequency cavity of a proton cyclotron, and the device comprises a base which comprises a switching part and two fan-shaped parts; the limiting mechanism comprises first components, a second component and a third component, and the third component, the second component and the two first components jointly define a first limiting space; the first supporting component is detachably arranged on at least one fan-shaped part, and a second limiting space is formed between the first supporting component and the second component; the second supporting part is detachably arranged on one fan-shaped part, and a third limiting space is formed between the second supporting part and the second part; a third support member selectively disposed on an upper side of the second support member; and the lateral limiting piece is arranged on the other side, close to the switching part, of the fan-shaped part, and the lateral limiting piece is detachably connected with the fan-shaped part. The number of welding tools and the welding frequency can be reduced, and the welding efficiency is improved.

A superconducting proton cyclotron (100). The superconducting proton cyclotron (100) comprises a main cyclotron system (10), a cyclotron auxiliary system (20) and a cyclotron control system (30). The main cyclotron system (10) comprises an ion source (11), a central region (12), a superconducting magnet system (13), a radio frequency system (14) and a lead-out region (15). The ion source (11) is used for generating a proton beam; the central region (12) is used for leading out the proton beam of the ion source (11) and performing beam focusing inside the central region (12); the radio frequency system (14) leads out and accelerates the beam of the central region (12); a static magnetic field generated by the superconducting magnet system (13) can constrain the proton beam and accelerate same to target energy; the lead-out region (15) can lead out the proton beam.

The invention relates to the technical field of magnetic field distribution detection, in particular to a magnetic field distribution detection method for a medical cyclotron magnet, and the method comprises the steps: equally dividing a to-be-detected medical cyclotron magnet into magnetic field regions; collecting the magnetic field intensity at each moment in each magnetic field area, and dividing all the magnetic field areas into various categories; determining a magnetic field current disturbed value of any magnetic field area at the current moment; acquiring the coil current disturbance of any magnetic field area at the current moment; and combining the magnetic field current disturbed value and the coil current disturbed degree of each magnetic field region to determine the measurement error degree of the magnetic field intensity measured by each magnetic field region, and judging and screening the magnetic field intensity data of each magnetic field region. The magnetic field distribution detection precision of the medical cyclotron magnet is improved.

The invention discloses a radio frequency plasma generating device with a radial confinement magnetic field, and belongs to the technical field of plasma generating devices. Comprising a plasma generation area and a diffusion area which are vertically distributed and communicated, a quartz glass cover is arranged outside the plasma generation area, a water-cooling shielding device is arranged in the quartz glass cover, a magnet exciting coil is arranged outside the quartz glass cover, a quartz shell is arranged outside the diffusion area, and an outer annular magnet is fixedly arranged on the periphery of the quartz shell in a sleeving mode. An inner annular magnet matched with the outer annular magnet is fixed to the inner bottom of the quartz tube, and the bottom end of the quartz glass cover is fixedly connected with the top end of the quartz shell. The beneficial effects of the invention are that magnetic field configuration is optimized, and an induced potential field generated by electron cyclotron motion and an external constraint magnetic field are mutually counteracted; lateral diffusion of electron beams is effectively inhibited, spatial non-uniformity of plasma density is remarkably reduced, and the electron beams can be highly and uniformly diverged and distributed in a whole plasma area.

The invention relates to the technical field of axial focusing enhancement of a cyclotron, and provides an axial focusing enhancement method and system for a medical cyclotron, and the method comprises the steps: collecting vibration data, a beam intensity value, temperature data, the positions of all particles in a particle beam, the average magnetic field intensity, the magnetic field intensity difference, and the current; the divergence angle and energy of the particle beam are measured; determining an axial focusing effect evaluation value at the current sampling moment; determining the particle beam stability at the current sampling moment, and determining the magnetic field uniformity at the current sampling moment by combining the average magnetic field intensity and the magnetic field intensity difference at the current sampling moment; and the axial focusing effect evaluation value, the average magnetic field intensity and the current at the current sampling moment are combined to realize the axial focusing enhancement of the medical cyclotron. According to the invention, the focusing precision of axial focusing enhancement of the medical cyclotron and the stability of the focusing effect can be improved.

A beam equipment controlling method is provided. The method includes: proton beam regulatory steps, including: generating a first proton beam after confirming that the generating conditions are met, and marking the proton beam regulatory steps as completed after confirming that the first proton beam meets the specifications; neutron beam regulatory steps, including: generating a first neutron beam after confirming that the proton beam regulatory steps are completed and the generating conditions are met, confirming that the first neutron beam meets specifications, and marking the neutron beam regulatory steps as completed after turning off the cyclotron system; and treatment regulatory steps, including: generating a second neutron beam after confirming that the neutron beam regulatory steps are completed and the treatment-beam generating conditions are met, confirming that the second neutron beam meets treatment needs; and marking the treatment regulatory steps as completed after turning off the cyclotron system.

The invention relates to a low-energy type cyclotron and a solid target device used for the low-energy type cyclotron, and the solid target device comprises a target material installation part which is used for installing a target material and comprises a first end and a second end which are oppositely arranged in the first direction; the first cooling piece is arranged at the first end of the target material mounting piece, a first cooling cavity is formed in the first cooling piece, and a gas cooling medium circulates in the first cooling cavity; and the second cooling piece is arranged at the second end of the target material mounting piece, a second cooling cavity is formed in the first cooling piece, and the second cooling cavity is used for circulating a liquid cooling medium. The cyclotron is simple in structure and low in refitting cost, can be additionally arranged on the basis of an original accelerator system, does not need to be reformed, and greatly reduces the use cost; by arranging the first cooling piece and the second cooling piece which are separated, air cooling and water cooling are physically isolated, no mixed loop exists, starting is conducted as needed through an independent control system, the cooling efficiency is greatly improved, and the cooling device is more suitable for the low-energy cyclotron.

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 utility model discloses a kind of variable beam binding devices for cyclotron, install in beam pipeline, realize the size and shape of remote online hard constraint beam envelope by the variable adjustment of inner hole, involve variable beam binding technical field, including vacuum connection flange, fixed support, transmission gear, rotary disc, gear disc, blade combination, the blade combination, vacuum connection flange are connected with vacuum pipeline;Fixed support, the fixed support is set to vacuum connection flange side edge, and the fixed support is used to fix beam binding blade, motor, transmission gear, rotary disc;Gear disc is connected with the fixed support, and one side of the beam binding blade combination is connected;Rotary disc.The utility model can adjust multiple beam binding aperture, without disassembling when adjusting, save vacuum extraction and replacement time.Structure is simple, and cost is low, and implementability is high.Dismounting is reduced simultaneously, and the time of maximum degree operation personnel contact dose can be operated.

The invention discloses a radio frequency signal control device and method and related equipment, and relates to the technical field of radiotherapy, and the device comprises a main control module which is used for the execution of radio frequency signal control logic, and is used for collecting the signal of a radio frequency cavity and the incident power and reflection power of a directional coupler in real time, and feeding back the power to the main control module, the signal of the radio frequency cavity comprises D box power; the phase detection module is used for detecting the phase error of the incident power and the D box power in real time and generating an oscillation driving signal during phase matching; the amplification module is used for amplifying the oscillation driving signal; and the base signal generation module is used for generating a radio frequency base signal according to the received oscillation driving signal so as to realize closed-loop control of a radio frequency signal of the synchrocyclotron and realize stable and efficient acceleration of a proton beam in the synchrocyclotron system.

The invention relates to the technical field of magnetic field stability measurement, in particular to a method for improving magnetic field stability evaluation of a small cyclotron, and the method comprises the steps: obtaining the current data of each coil, the ferromagnetic temperature data and the magnetic field intensity data of each point in the cyclotron in real time; obtaining a current influence coefficient and a temperature influence coefficient of each monitoring time period according to the current change characteristic and the temperature change characteristic of each coil in each monitoring time period, and obtaining a disturbance coefficient of each monitoring time period in combination with an interdependence degree between the current influence coefficient and the temperature influence coefficient in each monitoring time period; and acquiring an unstable coefficient of each monitoring time period by combining the change characteristics of the magnetic field intensity data in each monitoring time period so as to evaluate the stability of the magnetic field. By comprehensively analyzing the influence of the current data, the temperature data and the magnetic field intensity data on the magnetic field stability, the accuracy of the evaluation result of the magnetic field stability of the cyclotron is improved.

The invention provides a core column and magnetic pole structure of an endogenous cyclotron, the core column is symmetrically arranged in central areas at two sides of a central plane of the accelerator, the core column is a big-end-down circular truncated cone-shaped core column, a pair of core column concave platforms is arranged on the circular truncated cone, and the core column concave platforms are used for arranging ion sources; according to the magnetic pole structure, a main magnetic pole and a core column are integrally manufactured, and the core column in the middle of the integrated magnetic pole structure is of a big-end-down circular-truncated-cone-shaped structure; chamfers are arranged at the junctions of the two side faces and the upper surface of each magnetic pole of the integrated magnetic pole structure, and four slopes inclining towards the central point of the central area are designed in the head area of the fan-shaped magnetic pole, so that transition from a circular truncated cone in the central area to a peripheral magnetic field is smoother; on the basis that the radial size of the upper surface of the core column is not increased, the head magnetic field is still improved by increasing the volume, close to the lower surface, of the core column; the two symmetrical concave platforms are designed on the circular truncated cone type core column, so that the symmetry of a magnetic field is reserved, and meanwhile, a sufficient installation space is reserved for an ion source.

The invention relates to the technical field of magnetic field measuring devices, and discloses a cyclotron magnetic field measuring device which comprises a lower Dewar, a lower magnet, an upper Dewar, an upper magnet, and an adjusting and detecting part and a supporting and rotating part which penetrate through central holes of the lower Dewar, the lower magnet, the upper Dewar and the upper magnet. The probe adjusting part comprises an adjusting driving part, a screw rod driven by a bevel gear set and a sliding table in threaded connection with the screw rod; and the detection piece comprises two feeler levers which are symmetrically arranged on the sliding table and have different lengths, and the feeler levers are respectively connected with the first Hall probe and the second Hall probe. The supporting and rotating part comprises a supporting and driving piece connected with the lower motor and arranged below the bevel gear set; and the driving piece is connected with the motor and arranged above the bevel gear set and the driving piece, so that rotary adjustment is achieved, and contact with the magnet is avoided. The device further comprises a measuring frame, a linear guide rail, a measuring protection part and an auxiliary measuring part. Axial translation of the probe is realized through the driving and adjusting part, radial rotation is realized through the supporting and rotating part, and the magnetic field intensity of different areas between the upper magnet and the lower magnet can be comprehensively and accurately measured in combination with the probe rods with different lengths.

The invention relates to the technical field of cyclotron calibration, and provides a medical cyclotron magnetic measurement system calibration method comprising the following steps: collecting radiuses of all detection coils of a medical cyclotron, and magnetic induction intensity data and temperature data of all detection coils at different heights; obtaining a longitudinal magnetic induction intensity sequence and a transverse magnetic induction intensity sequence; obtaining an abnormal coefficient of the target detection coil, and determining a standard detection coil and a non-standard detection coil; constructing a temperature-magnetism relation point set, determining the weight of each point in the temperature-magnetism relation point set, and further determining a temperature-magnetism relation curve; and calibrating the magnetic induction intensity data of the non-standard detection coil at each height according to the temperature-magnetism relation curve to realize calibration of the magnetic measurement system of the medical cyclotron. The invention aims to solve the problems that the internal resistance of different detection coils in a detection coil panel is different and can be changed, so that the calibration result of a magnetic measurement system is deviated, and the performance of a medical cyclotron is poor.

The present invention relates to a cyclotron comprising first and second internal ion sources configured to form first and second beams of identical charged particles wherein the cyclotron is further configured to generate a local asymmetry of an accelerating electric and / or magnetic field, the first beam and the second beam are combined to form a combined beam and the combined beam passes through a single extraction outlet. The invention also relates to an acceleration system comprising N cyclotrons, where M cyclotrons are the cyclotrons according to the invention, Mgt; 0. The invention also relates to a device for treating a patient by BNCT, comprising: an acceleration system according to the invention; a target configured to emit an epithermal neutron beam when bombarded with the proton or deuteron multi-combination beam; and a treatment region configured to hold a patient to be treated within the treatment region.

The present disclosure relates to a cyclotron, a radiation therapy apparatus, an adjustment unit, an adjustment device of a superconducting coil, and an adjustment method thereof. The adjustment unit includes a rotating shaft, a drive assembly, a transmission assembly, and a detection element. The rotating shaft is capable of rotating driven by an external drive unit; the drive assembly includes an actuator and a tension assembly, the actuator being configured to drive the tension assembly to move linearly through rotation, and one end of the tension assembly being connected to a superconducting coil and capable of driving the superconducting coil to move; the transmission assembly is connected to the rotating shaft and the actuator, respectively, and configured to transmit power to the actuator; and the detection element is connected to the actuator and configured to monitor a displacement of the tension assembly and a displacement of the superconducting coil.

The invention provides a cyclotron electrostatic deflection plate beam loss heat source reconstruction method, and relates to the technical field of particle accelerator thermal analysis and multi-physics field coupling calculation, and the method comprises the steps: 1, configuring beam dynamics simulation parameters, multi-particle tracking is carried out under a three-dimensional field graph containing a central area electromagnetic field, a harmonic coil magnetic field and an electrostatic deflection electric field, and a particle loss list is generated; step 2, transferring the particle loss list into a beam source file of a Monte Carlo radiation transport program, configuring Monte Carlo parameters including a deflection plate material, a boundary, a particle type and an energy spectrum, executing particle transport simulation, and obtaining a three-dimensional energy deposition matrix on an electrostatic deflection plate element; according to the method, high-resolution heat source reconstruction is realized, the peak temperature rise calculation error of the deflection plate can be reduced, a temperature field solving result can be fed back to optimize the particle source, and a reliable basis is provided for thermal structure design and cooling optimization of the electrostatic deflection plate.

1. The name of the design product: ring magnetic support. 2. The use of the design product: the design product is used for supporting electronic equipment. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: design 1 perspective view 1. 5. Design 1 is designated as the basic design.

The invention discloses a particle beam leading-out device, a stripping film adjusting method and a cyclotron, and relates to the field of cyclotrons, the particle beam leading-out device comprises a driving motor, a magnetic fluid sealing device, a flange and a right-angle transmission mechanism which are connected in sequence; the driving motor is fixed at the front end of the flange through a motor mounting bracket; the input end of the magnetic fluid sealing device is connected with an output shaft of the driving motor, and the output end of the magnetic fluid sealing device penetrates through the flange and the support to be connected to the right-angle transmission mechanism. The right-angle transmission mechanism is connected to the driving motor and the two film stripping structures, so that the two film stripping structures can be subjected to angle adjustment or position switching, and the right-angle transmission mechanism is composed of the base, the first main shaft and the second main shaft and realizes movement direction switching through a structural mode of a hinge and a connecting rod; vibration and noise generated by gear meshing can be effectively avoided, abrasion loss is greatly reduced through the structure, and therefore the maintenance frequency of equipment is greatly reduced.

This application relates to an ion cyclotron antenna device, including a controller; a detection component electrically connected to the controller, the detection component being used to detect the direction of the magnetic field in real time; a rotating device electrically connected to the controller; and an ion cyclotron antenna connected to the rotating device. When the direction of the magnetic field changes, causing the magnetic field direction to no longer be perpendicular to the ion cyclotron antenna, the detection component immediately feeds back a signal to the controller. The controller compares the relative positional relationship between the antenna and the magnetic field, and then outputs a command to the rotating device, enabling the rotating device to drive the ion cyclotron antenna to rotate and adjust, so that the ion cyclotron antenna is once again perpendicular to the direction of the magnetic field. Through the coordinated work of the detection component, the rotating device, and the controller, the relative perpendicularity between the ion cyclotron antenna and the direction of the magnetic field can always be guaranteed, thereby effectively suppressing the generation of parallel electric fields, reducing the generation of sheath potential, reducing the impact of high-energy particles on the antenna, and extending the steady-state operation time of the antenna and the nuclear fusion device.

The present invention provides a method, device and electronic equipment for optimizing the magnetic field of a cyclotron main magnet, and relates to the technical field of particle accelerators. A shim block is arranged on the pole face of the main magnet, and the method includes: determining the structural parameters of the pole face, and determining the structural parameters of the shim block based on the structural parameters of the pole face; dividing the pole face into at least two position areas according to the structural parameters of the shim block; determining the magnetic field variation generated by a single shim block in different position areas for each magnetic field area; determining the first current magnetic field of the main magnet and the theoretical magnetic field of the main magnet, and determining the magnetic field difference of each magnetic field area based on the first current magnetic field and the theoretical magnetic field; wherein the magnetic field area includes the position area and the central opening area of ​​the pole face; determining the number of shims set on each position area based on the magnetic field difference and the magnetic field variation, optimizing the isochronism of the magnetic field of the cyclotron main magnet, and improving the accuracy of the magnetic field distribution.

The invention discloses a first and third harmonic shared cavity type impedance matching mechanism for a high-frequency buncher, which is characterized in that the first and third harmonic shared cavity type impedance matching mechanism is connected with a bunching electrode to jointly form the first and third harmonic shared buncher; the shared buncher is arranged between an external ion source of the cyclotron and the cyclotron; the cavity type impedance matching mechanism shared by the first harmonic and the third harmonic comprises a cavity type matching circuit shared by the first harmonic and the third harmonic and a coupler shared by the first harmonic and the third harmonic. According to the invention, the groove which is folded for multiple times is innovatively processed in the lower cavity of the cavity, so that the integrated structure of the lower cavity and the outer conductor is ingeniously realized, and the risk of folding cracking is fundamentally eliminated. Through the first harmonic and third harmonic shared cavity design, the function of originally needing two independent bunchers is integrated into one shared cavity, the system cost is effectively reduced, meanwhile, the occupied space is remarkably reduced, and the requirement of a compact accelerator is perfectly met.

The present application relates to the technical field of accelerator beam measurement, and particularly discloses a water gravity type inner target beam measurement device, which comprises a beam measurement assembly, a gravity adjustable cooling assembly, a lever balance assembly and a limiting piece, the beam measurement assembly is connected to one end of the lever balance assembly through the gravity adjustable cooling assembly, and the limiting piece is arranged on the side surface of the lever balance assembly. The device adopts a seesaw type structure, fully utilizes the installation space in the cyclotron shell, utilizes the gravity of the cooling liquid as the power of the seesaw type structure, can omit the arrangement of a complex power driving piece, is small in size, simple in structure, low in cost, good in cooling effect, and stable in the beam size of the inner target measurement piece during measurement.

The invention relates to a cyclotron which enables the production of α- or β-emitting radionuclides. The cyclotron, with a magnetic periodicity of 3, comprises three accelerating cavities connected to the centre, thus not requiring phase control between the cavities, forming a single high-frequency resonator. The six accelerating gaps per turn enable rapid acceleration (the angle ϕ between the accelerating gaps of each cavity being approximately 30°) which is essential for acceleration at the third and sixth harmonics. This cyclotron preferably has an injection system (31) supplied by different types of ion sources, making it possible to efficiently accelerate charged particles having Z / A ratios equal to 1 / 2 and to 1 / 4. The cyclotron may also have stripping extraction means positioned in the cyclotron so as to extract the charged particles and double their state of charge. These particles enable a set of nuclear reactions for producing α-emitting radionuclides.

The present invention relates to the field of plasma physics technology and discloses a method for evaluating the influence of plasma circumferential rotation on tokamak hybrid operation, comprising: designing the plasma current required for the hybrid operation of the tokamak device based on the parameters of the tokamak device and the auxiliary heating capacity; Ip and vertical field Bt The present invention comprises designing parameters for the neutral beam injection system and the electron cyclotron wave resonance system required for the tokamak's hybrid operation; injecting the initial neutral beam into the tokamak and performing integrated simulation calculations to obtain a first set of operating parameters for the tokamak's hybrid operation; adjusting the torque of the neutral beam injected into the tokamak to calculate a second set of operating parameters for the tokamak's hybrid operation; and analyzing and comparing the first set of operating parameters with the second set of operating parameters. The present invention can independently assess the impact of plasma toroidal rotation on the tokamak's hybrid operation.

The present invention relates to a single particle effect simulation irradiation device based on a heavy ion cyclotron, belonging to the technical field of radiation hardening. The device includes a mixed beam switching module, a beam line beam expansion module, a diagnostic target chamber and an irradiation target chamber. A beam current on-line monitoring module is provided in the diagnostic target chamber, and a beam current measurement module is provided in the irradiation target chamber. They are all connected through pipelines. The mixed beam switching module is used to quickly provide a single ion beam current. After being expanded by the beam line beam expansion module, a large-area uniform single ion beam current is obtained. The expanded single ion beam current is irradiated onto the device under test in the irradiation target chamber. During the irradiation process, the fluence / fluence rate and beam spot uniformity of the single ion beam current are monitored by the beam current on-line monitoring module, and the beam current energy and fluence rate are measured by the beam current measurement module. Using the device provided by the present invention can solve problems such as the generation of a large-area uniform beam spot, extraction to the irradiation target chamber for irradiation, and rapid sample change.

The invention provides controllable nitrogen-hydrogen nuclear fusion equipment. The controllable nitrogen-hydrogen nuclear fusion equipment comprises a hydrogen nuclear particle generation device, a nitrogen nuclear generation device, a convolution migration particle accelerator and a focusing reaction field, the hydrogen nuclear particle generation device is provided with a hydrogen nuclear particle outlet, and the hydrogen nuclear particle outlet conveys hydrogen nuclear particles into the rotary migration particle accelerator; the rotary migration particle accelerator comprises a straight line section and an arc section, the hydrogen nuclear particles sequentially penetrate through the straight line section and the arc section to increase the speed, and the hydrogen nuclear particles with the increased speed are conveyed to the focusing reaction field; the nitrogen nuclear particle outlet conveys low-speed nitrogen nuclear particles into the focusing reaction field; the hydrogen nuclear particle beam with the increased speed and the low-speed nitrogen nuclear particle beam are converged towards the center of the focusing reaction field to generate nuclear reaction. According to the cyclotron migration particle accelerator, through the synergistic effect of the linear section and the arc section, hydrogen nucleus particles are accelerated through an electric field, meanwhile, the particles are deflected in the arc section, and repeated acceleration is achieved.

The present application relates to the technical field of cyclotron, and discloses a cyclotron ion source replacement device and a replacement method. The device is separated from the upper part of the cyclotron, and a lifting channel is constructed through the cavity of the lower central shaft, a sealing flange and a plug valve. A lifting member is arranged in the vacuum tube to transfer the ion source to a second vacuum chamber. The replacement is completed by opening the window after the gas valve releases the vacuum. After the gas is closed and vacuumed to the same vacuum degree as the main cavity, the plug valve is opened and the lifting member is reversely driven to push the ion source back to the working position, so that the ion source is quickly and reliably replaced under controlled vacuum conditions.