307 results about "Cyclotron" patented technology

The invention relates to the technical field of medical cyclotrons, in particular to a medical cyclotron magnetic field intensity adjusting method based on temperature compensation, and the method comprises the following steps: in the process of adjusting the magnetic field intensity of a main magnet based on temperature information, obtaining a temperature variation threshold: collecting the temperature on the surface of the main magnet in real time; determining a temperature difference coefficient, a temperature anomalous coefficient, a temperature abnormal coefficient and a trend approximate value of each acquisition moment; comprehensively analyzing the temperature values acquired by all the sensors, and determining the temperature difference degree and difference factor of each sensor at each acquisition moment; determining the avoiding adjustment value of each sensor at each acquisition moment; and acquiring a temperature variation threshold value at each acquisition moment. The invention aims to solve the problem that the magnetic field intensity of the cyclotron cannot be adjusted according to the actual environment temperature, so that the beam stability and the beam extraction efficiency in the operation process of the medical cyclotron are improved.

The invention discloses a method for dynamically adjusting the frequency of a resonant cavity of a cyclotron and a tuning circuit, which are applied to the field of cyclotrons and solve the problem that when the frequency of the resonant cavity of the cyclotron is adjusted by judging the magnitude of reflection power, due to the fact that the reflection power can change in multiple stages in a single macro pulse period, the frequency of the resonant cavity of the cyclotron is adjusted. And an accurate numerical value is difficult to obtain through a simple amplitude sampling circuit. According to the invention, through determining the stable resonance time period of the resonant cavity, the phase difference between the incident power signal and the reflection power signal is sampled in the corresponding stable resonance time period of the resonant cavity, and the change value of the phase difference between the incident power signal and the reflection power signal is dynamically compared. According to the conversion relation between the phase difference change value and the frequency change value, the resonant cavity frequency change value is obtained through conversion, then the resonant cavity tuning device is adjusted to enable the resonant cavity frequency to be consistent with the frequency of the incident power signal all the time, and the dynamic tuning method of the resonant cavity is achieved.

The invention discloses a method for measuring and calculating beam phase distribution of an isochronous cyclotron, which belongs to the technical field of production of cyclotrons and comprises the following steps of: moving a radial target to a central area of the cyclotron to enable the beam intensity to reach the maximum value; moving the radial target to a position corresponding to the beam extraction point in the radial direction, and adjusting the high frequency and the exciting current to enable the beam intensity to reach the maximum value; increasing the high frequency according to the step length until the beam current intensity is reduced to half; reducing the high frequency according to the step length until the beam current intensity is reduced to half; calculating beam phase slippage; enabling the radial target to be close to the central area of the accelerator according to the step length and repeating the process to obtain a plurality of beam phase slips; and making a beam phase distribution curve according to the distribution relation that the plurality of beam phase slippage changes along with the radius. The method has the characteristics of simplicity, convenience and easiness in operation, the workload is greatly reduced, the debugging process and the development period of the isochronous cyclotron are shortened, the efficiency is remarkably improved, and the cost is reduced.

The invention relates to the technical field of data cleaning, in particular to a medical cyclotron vacuum chamber leakage monitoring method, which comprises the following steps: acquiring the vacuum degree at each moment in a vacuum chamber, the operating power of a vacuum pump at each moment and the magnetic field intensity at each moment in real time when a medical cyclotron operates; dividing all moments into a plurality of monitoring time periods; determining the monitoring sensitivity of each monitoring time period; determining a power influence index at any moment; determining a relative amplitude difference of each monitoring time period; determining a magnetic field influence index at any moment; determining a measurement distance between any moment and other moments; and performing data cleaning on the vacuum degrees at all moments by adopting an anomaly detection algorithm, and monitoring chamber leakage of the vacuum chamber in combination with a deep learning model. According to the invention, the interference of redundant information in the data is reduced, and the accuracy of chamber leakage monitoring of the vacuum chamber is improved.

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 discloses a compact multipurpose proton beam system, belongs to the field of radiotherapy, and solves the problem that a treatment terminal of an existing proton beam system is single in type and not compact enough. The superconducting isochronous cyclotron system is connected to the two-way selection system through the beam adjusting system, the two-way selection system comprises a two-way dipole magnet and two branch selection systems, and the two branch selection systems are connected to the rear end of the two-way dipole magnet in parallel. The system also comprises a beam transport system, and the beam transport system is composed of a first treatment terminal section, a second treatment terminal section and a third treatment terminal section. One branch selection system is connected to the fixed experiment beam transport system through the first treatment terminal section, the other branch selection system is connected to the fixed pen-shaped beam transport system through the second treatment terminal section, the third treatment terminal section is a branch of the second treatment terminal section, and the third treatment terminal section is connected to the rotary beam transport system. According to the invention, the beam irradiation of the multi-type and multi-purpose treatment terminal is realized by utilizing the design of a bidirectional selection system.

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 discloses an internal-cooling-based high-frequency coupling window for a high-power cyclotron. The internal-cooling-based high-frequency coupling window is characterized in that an air knife structure is arranged at the atmosphere end of the internal-cooling-based high-frequency coupling window; two groups of conductor choke units with different lengths are arranged on two sides of a ceramic chip of the high-frequency coupling window based on internal cooling, and the two groups of conductor choke units with different lengths are equivalent to two groups of inductors and are used for forming a double-filter circuit of the high-frequency coupling window; a ceramic coating film is arranged on one side of the ceramic sheet of the high-frequency coupling window; according to the air knife structure, more heat on the surface of the ceramic chip is taken away through compressed air; on one hand, the filter unit and the conductor choke unit form a filter circuit of a high-frequency coupling window atmosphere end; according to the invention, the air knife structure is ingeniously utilized, and enhanced cooling is carried out on the ceramic wafer of the coupling window structure; the inductance value of the coupling window is adjusted by using the conductor choke unit, the standing-wave ratio coefficient of the coupling window is reduced, the surface temperature of the ceramic chip is reduced, and the risk of explosion of the coupling window is reduced.

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 relates to the technical field of signal calibration, in particular to a main radial probe signal calibration method for a medical cyclotron, and the method comprises the steps: collecting probe current data, and constructing a probe current data sequence; further obtaining a time domain amplitude fluctuation degree; calculating the time domain baseline stability degree of each period; obtaining the time domain noise interference degree of each probe position; obtaining the frequency domain bandwidth difference of each probe position; obtaining the frequency domain noise interference degree of each probe position; and acquiring an external noise interference degree based on the time domain noise interference degree and the frequency domain noise interference degree, and calibrating the main radial probe signal. According to the invention, the actual beam current intensity can be evaluated more accurately.

The invention discloses a radiotherapy device and an automatic search system and method for the maximum current intensity of an accelerator. The system comprises: a cyclotron, a first driving component connected to the cyclotron and a first ion source respectively, and driving the first ion source to move away from a second ion source according to a preset step length; a second driving component connected to the cyclotron and the second ion source respectively, and driving the second ion source to move away from the first ion source according to a preset step length; a recording module connected to the first and second driving components, recording all first positions and second positions of the first and second ion sources, and all position combinations corresponding to each first position and the second position; a debugging module controlling the cyclotron to emit a beam under each position combination, and introducing, accelerating and extracting protons generated by the first and second ion sources; a storage module, acquiring and storing the beam intensity corresponding to each position combination to form a data set; and a search module searching for the maximum beam intensity from the data set to ensure a better radiotherapy effect.

The invention discloses an air suction thin-wall part and a preparation method thereof, a vacuum chamber assembly and a vacuum regulation and control method, the air suction thin-wall part is used for being detachably installed in a vacuum chamber of a cyclotron, and the air suction thin-wall part can be activated and adsorb air in a vacuum chamber body; the air suction thin-wall part is used for surrounding the position close to the inner side wall of the vacuum chamber body. The air suction thin-wall part is provided with a plurality of open holes, and the surface area of the inner wall of each open hole is at least two times larger than the area of the cross section of the corresponding open hole. The technical problems that in the prior art, due to the fact that a compact cyclotron is small in size and small in available space, it is difficult to maintain the long-time high-vacuum state in the vacuum chamber by installing a plurality of low-temperature cold plates or additionally arranging a plurality of vacuum pumps are solved. The auxiliary device assists an existing vacuum pump to jointly maintain a long-time high-vacuum state in the vacuum chamber, so that the requirement for the pumping speed of the vacuum pump is lowered, and the pumping speed of an existing common vacuum pump can meet the requirement.

The double-sided cooling capsule target chamber comprises a capsule target piece assembly, a bearing assembly, a target chamber head assembly and a target chamber tail assembly, and the capsule target piece assembly is circular; a groove part and a channel communicated with the groove part are formed in the bearing assembly, and a capsule target piece assembly is arranged in the groove part; a helium cooling channel and a water cooling channel are respectively arranged in the bearing component corresponding to the front surface and the back surface of the capsule target sheet component; the target chamber head assembly is fixed at one end of the bearing assembly, and the target chamber head assembly is provided with a leading-in part for leading an accelerator particle beam into the channel; the target chamber tail assembly is fixed to the other end of the bearing assembly. The double-face cooling effect of copper supporting face water cooling and aluminum supporting face gas cooling can be achieved on the capsule target piece assembly, and the use feasibility of target pieces made of different heat conduction performance materials is improved; the irradiation efficiency is improved, the manufacturing cost is reduced, and conveying and cooling are facilitated; and meanwhile, the treatment capacity of dissolution and separation of the irradiated target sheet can be reduced, and the post-treatment cost is reduced.

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 cyclotron particle therapy center provided with a linear acceleration type range shifter of a switchable therapy system comprises a particle cyclotron (1), an energy selection system (2) and the linear acceleration type range shifter (3), wherein the energy selection system (2) and the linear acceleration type range shifter (3) are sequentially connected with the particle cyclotron (1) in series, and a multi-angle deflection magnet (4) receives a particle beam emitted by the linear acceleration type range shifter (3). The linear acceleration type measuring range shifter (3) is in butt joint with M beam transport sections (5) after deflection, M is larger than 1, the M beam transport sections (5) are in butt joint with a two-way scanning treatment system (6), the use of the linear acceleration type measuring range shifter (3) greatly improves the tumor depth scanning speed, the volume recoating scanning method is more efficient, the use method of the switchable treatment system achieves multiple purposes, and the application range of the linear acceleration type measuring range shifter (3) is wider than the application range of the linear acceleration type measuring range shifter (3), so that the application range of the linear acceleration type measuring range shifter (3) is wider than the application range of the linear acceleration type measuring range shifter (3). The path of a beam transport section is shortened, and the use number of electromagnetic components is reduced.

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.

The invention relates to the technical field of leakage point detection, in particular to a medical cyclotron vacuum chamber leakage point detection method. The method comprises the following steps: firstly, according to a fluctuation deviation between helium concentration curves corresponding to each preset part and other preset parts, obtaining a leakage risk outburst coefficient of each preset part; according to the time interval between the adjacent helium leakage detection processes, the helium concentration before detection and the helium concentration during detection, the environmental pollution coefficient of each preset part in the helium leakage detection process is obtained; further acquiring an environment fluctuation coefficient according to all the environment parameter curves; and finally obtaining the leakage point credibility of each preset part. According to the method, the leakage risk is evaluated based on the change characteristics of the helium concentration in the vacuum chamber in the helium leakage detection process of different preset parts, and then the environmental interference condition in the helium leakage detection process is analyzed for compensation, so that the accuracy of a leakage point detection result is improved.

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 provides a high-frequency amplitude-phase equalization device and method for a dual-drive four-resonance cyclotron, and the device comprises a first vector modulator and a second vector modulator which are used for providing incident drive power signals for a first high-frequency power source and a second high-frequency power source respectively. The DSP control board is used for respectively controlling the amplitude and the phase of incident driving power signals output by the first vector modulator and the second vector modulator, and the data collector is respectively connected with the first vector modulator, the second vector modulator, the first high-frequency power source, the second high-frequency power source and the DSP control board. The method comprises the steps that a DSP control panel carries out PID error operation based on target amplitude information x1n 'and x2n', phase difference information and actual amplitude and phase information x1 and x2, control over the amplitude and phase of incident driving power signals output by a first vector modulator and a second vector modulator is achieved, and it is guaranteed that the amplitude and phase signals of two paths of high-frequency power sources are consistent. The invention provides an amplitude-phase equalization method based on a lookup table, which ensures the amplitude-phase equalization of the output power of two high-frequency power sources.

The invention discloses a magnetic field measuring device and method, and the device comprises an excitation assembly which is provided with an excitation space, the excitation space is used for placing an extraction magnetic channel assembly, the extraction magnetic channel assembly comprises a magnetic material part and a supporting structural part, the magnetic material part is detachably disposed on the supporting structural part, and the magnetic material part is detachably disposed on the supporting structural part. The magnetic material piece and the supporting structural piece jointly form a channel suitable for beam movement; and the detection assembly is movably arranged in the channel so as to detect magnetic field information of the magnetic field led out of the channel. The excitation assembly and the detection assembly are matched to measure the leading-out magnetic field in the leading-out magnetic channel assembly, the magnetic field information is directly obtained, the magnetic field information in the channel can be obtained in advance outside the cyclotron before debugging, the adjustment of the leading-out magnetic channel assembly can be guided, the debugging time can be shortened, and the debugging efficiency is improved. Debugging steps are simplified, efficiency is improved, and cost is reduced.

The invention relates to the technical field of magnetic pole gap measurement, in particular to an intelligent measurement method and device for a magnetic pole gap of a medical cyclotron. The method comprises the following steps: acquiring an upper magnetic pole distance, a lower magnetic pole distance and an adjustment angle of each sampling point under each sampling rate; obtaining the repeatability of the magnetic pole sequence according to the magnetic pole distances of all the sampling points, obtaining the variation according to the adjustment angles of the sampling points, and obtaining the magnetic field parameter coverage of the sampling rate based on the variation and the repeatability; according to the maximum value and the minimum value of the adjustment angle corresponding to the sampling rate and the angle difference between the sampling point and the adjacent sampling point, the angle dynamic alternation is obtained; and selecting an optimal sampling rate based on the magnetic field parameter coverage and the angle dynamic alternation, and performing gap measurement through the optimal sampling rate. The validity of the ranging data is ensured.

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 provides a magnetic field optimization method and device of a cyclotron main magnet and electronic equipment, and relates to the technical field of particle accelerators. A shimming block is arranged on a magnetic pole face of a main magnet, and the method comprises the steps that structural parameters of the magnetic pole face are determined, and structural parameters of the shimming block are determined based on the structural parameters of the magnetic pole face; dividing the pole face of the magnetic pole into at least two position areas according to the structural parameters of the shimming block; determining the magnetic field variation generated by a single shimming block for each magnetic field region in different position regions; determining a first current magnetic field of the main magnet and a theoretical magnetic field of the main magnet, and determining a magnetic field difference quantity of each magnetic field region based on the first current magnetic field and the theoretical magnetic field; wherein the magnetic field area comprises the position area and a central opening area of the pole face of the magnetic pole; the number of shimming blocks arranged on each position area is determined based on the magnetic field difference quantity and the magnetic field variation quantity, the isochronism of the magnetic field of the main magnet of the cyclotron is optimized, and the precision of magnetic field distribution can be improved.

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.