102 results about "Cyclotron" patented technology

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 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 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 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.

The invention relates to a radio frequency resonant cavity based on a short-circuit sliding block. The radio frequency resonant cavity comprises an input coaxial transmission line; the connector is connected with the input coaxial transmission line; the first output coaxial transmission line and the second output coaxial transmission line are connected with the connector. The first shifting mechanism is arranged on the first output coaxial transmission line, and the second shifting mechanism is arranged on the second output coaxial transmission line; each of the first output coaxial transmission line and the second output coaxial transmission line comprises an inner conductor, a short-circuit sliding block and an outer conductor, the outer conductor coaxially sleeves the inner conductor, a coaxial cavity is formed between the outer conductor and the inner conductor in a matching manner, and the short-circuit sliding block is connected with the first displacement mechanism and the second displacement mechanism; the short-circuit sliding block is movably arranged in the coaxial cavity. According to the ion cyclotron wave power transmission system, the effect of obtaining large voltage by means of small power is achieved, possible sparking points can be detected under the working condition of large voltage, then measures are taken in advance to prevent the sparking phenomenon, and stable operation of the ion cyclotron wave power transmission system is guaranteed.

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

The application relates to the technical field of plasma, in particular to a medical cyclotron beam centering adjustment method and system. The method comprises the following steps: acquiring a magnetic field sequence, a beam sequence and a current sequence; obtaining a beam fluctuation factor according to the difference in lag number corresponding to the maximum autocorrelation coefficient of the magnetic field sequence and the beam sequence, the correlation of the magnetic field sequence and the beam sequence, and the difference in the maximum autocorrelation coefficient; forming a beam fluctuation sequence by using the beam fluctuation factor; dividing the beam fluctuation sequence, and also dividing the current sequence; fitting a straight line based on the current fluctuation sequence and the current sequence; obtaining the current influence intensity at the current moment according to the difference between the excitation current in all sub-sequences and the overall excitation current of the current sequence and the mean square error; improving the proportional term according to the current influence intensity, controlling the excitation current based on the proportional term, and adjusting the proportional term in real time to optimize the magnetic field control effect. The application realizes higher and more stable nuclide production efficiency.

The invention provides a composite target material for producing astatine-211 through a cyclotron and an active cooling system of the composite target material, and relates to the technical field of radionuclide preparation. The composite target material comprises a working part and a connecting part which are integrally formed, the upper surface of the working part is provided with an inclined surface or a concave curved surface used for depositing a bismuth layer, and a plurality of liquid cooling runners communicated with one another are integrated in the connecting part; the active cooling system further comprises a supporting cooling base detachably connected with the composite target material, and the supporting cooling base and the composite target material jointly form a closed circulating cooling loop. The thermal load distribution can be optimized by changing the geometric configuration of the working surface, and the integrated liquid cooling and modular assembly and disassembly design is combined, so that efficient heat dissipation is realized, and meanwhile, rapid replacement of the target material is supported. According to the system, the anti-meltdown capability and the operation stability of the target material are remarkably improved, and the system is suitable for large-scale high-yield preparation of astatine-211.

This application discloses an ion source position adjustment mechanism and method thereof. The ion source position adjustment mechanism includes an installation component and an adjustment component. The installation component is disposed in the magnet valley region of a cyclotron and is used to install the ion source. The adjustment component is arranged radially along the cyclotron, with one end connected to the installation component and the other end extending through the vacuum cavity wall of the cyclotron to the outside of the vacuum cavity. The adjustment component can drive the installation component to move along a first direction and a second direction to adjust the position of the ion source, wherein the first direction and the second direction are perpendicular. This application can ensure that the ion source position adjustment accuracy meets the usage requirements while allowing the ion source position adjustment operation to be completed without personnel entering the accelerator, ensuring the personal safety of personnel and improving debugging efficiency.

The invention relates to the technical field of inductive coupling devices, and discloses an inductive coupling device for a cyclotron, and the inductive coupling device comprises an inner conductor and an outer conductor, the outer conductor sleeves the inner conductor, and a power feed-in end is formed at one end of the inner conductor; the coupling structure is connected with the inner conductor and the outer conductor; the separation structure sleeves the inner conductor and is connected between the inner conductor and the outer conductor; a shielding structure is formed on the end portion, deviating from the power feed-in end, of the inner conductor, and at least part of the separation structure is opposite to the shielding structure. Therefore, by arranging the shielding structure, the shielding structure can block electrons emitted by the high-voltage electrode of the cyclotron and reduce the risk that the electrons impact the separation structure, so that the risk that metallized coating is generated on the surface of the separation structure is reduced, the insulation performance of the separation structure is kept, and power feed-in of the cyclotron is kept; and the cracking risk of the separation structure due to overheating is reduced, so that the service life of the separation structure is prolonged.

This invention discloses a method for protecting beam measurement signals in a cyclotron accelerator, comprising: suppression of coupled high-frequency signals in the accelerator under normal conditions: measuring and adjusting the parameters of the first set of series resonant circuits S21 using a network analyzer, so that the frequency corresponding to the lowest point of S21 is equal to the accelerator's high-frequency frequency f0, and satisfying S21 < -30dB; calibration of the capacitor rotation angle scale range before abnormal condition monitoring; transmission line oscillation monitoring under abnormal conditions: setting the speeds of the first set of motors and the second set of motors, so that the first set of motors and the second set of motors drive the capacitor to move within the calibrated rotation angle scale range; transmission line oscillation control under abnormal conditions: when the signal interlocking device detects a high level input, the interlocking signal prohibits the output of the high-frequency system signal source and the operation of the power source, and the accelerator high-frequency system stops operating; this invention solves the problems of the beam measurement device being greatly interfered with by the accelerator's high-frequency signals and being greatly interfered with by unexpected transmission line oscillations.

The application relates to the technical field of inductive coupling devices, and discloses an inductive coupling device for a cyclotron, which comprises an inner conductor and an outer conductor, the outer conductor is sleeved on the inner conductor, one end of the inner conductor is provided with a power feeding end, a coupling structure is connected with the inner conductor and the outer conductor, a separation structure is sleeved on the inner conductor and connected between the inner conductor and the outer conductor, and the end of the inner conductor, which is away from the power feeding end, is provided with a shielding structure, and at least part of the separation structure is opposite to the shielding structure. Thus, by arranging the shielding structure, the shielding structure can block the electrons emitted by the high-voltage electrode of the cyclotron, the risk of the electrons hitting the separation structure is reduced, the risk of the surface of the separation structure being plated with a metal film is reduced, the insulation performance of the separation structure is beneficially maintained, the power feeding of the cyclotron is beneficially maintained, the risk of the separation structure being broken due to overheating is reduced, and the service life of the separation structure is beneficially prolonged.

A method of manufacturing a cyclotron (10) for producing a beam (18) of accelerated particles comprises the following steps: A cyclotron set-up is defined, the cyclotron set-up including a number of sectors (12) having an RF cavity (14, 16) of the cyclotron (10), an arrangement of the sectors (12) relative to each other and a cavity type for each of the sectors (12) selected from the group comprising acceleration cavities and flattop cavities. Then, a beam path in the cyclotron (10) is determined for a default operation mode and at least one beam path in the cyclotron (10) is determined for a cavity failure mode in which the radio-frequency cavity (14, 16) of one or more of the sectors (12) is not operational. A position of an extraction device (20) of the cyclotron (10) within the sectors (12) is calculated based on the determined beam paths, and the extraction device (20) is placed at the calculated position. Further, a cyclotron (10) and a method for operating a cyclotron (10) is described.

The utility model relates to the field of radiation medical equipment, in particular to a cyclotron target sheet extrusion device which comprises a cyclotron outlet and further comprises a target sheet body, a containing groove is formed in the upper side of the interior of the cyclotron outlet, and an installation box is fixedly installed at the upper end of the cyclotron outlet. An electric telescopic rod is fixedly mounted in the mounting box, the output end of the electric telescopic rod extends to the inner side of the containing groove and is fixedly provided with a connecting shifting piece, a flexible protection pad is fixedly mounted on the inner side of the connecting shifting piece, and a spherical buffering cavity is formed in the flexible protection pad; the flexible protection pad is driven by the electric telescopic rod to be attached to and extruded out of the target piece body, vibration force is absorbed and converted by means of air pressure change in the spherical buffering cavity in cooperation with the elastic deformation capacity of the buffering spring, the flexible protection pad is made of natural rubber, and the inner surface of the flexible protection pad is completely attached to the side of the target piece body. Therefore, the target sheet body can be extruded in a relatively fitting and soft manner.

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

A proton cyclotron is provided for dedicated use in head, neck and eye cancers, tumors or other medical conditions including pediatric and other cancers or medical conditions. The method of using a proton cyclotron for treating a tumor, cancer or medical condition of a patient includes positioning the patient on a support platform, such as on a patient table or in a robotic chair, and irradiating the tumor, cancer or other medical condition using a proton particle beam from the cyclotron for a predetermined time sufficient to treat the tumor, cancer or medical condition, wherein the proton particle beam produced by the cyclotron has an energy in a range of 70 MeV to 150 MeV and has a beam current in an amount suitable for radiation therapy, as can include a variable range of beam current for the radiation therapy.

Apparatuses and methods for accelerating charged particles include an accelerator. The accelerator includes a cavity comprising a chamber and conductive walls enclosing the chamber, and having one or more inlets and one or more outlets, an electro-magnet substantially surrounding at least a portion of the cavity; two or more rods disposed predominantly longitudinally within the chamber; and one or more RF couplers. The RF couplers are configured to generate a rotating or non-rotating dipole radio frequency field within the cavity by exciting the RF couplers in phase to accelerate the charged particles entering the cavity through the one or more inlets. The radio frequency field operates predominantly in transverse electromagnetic mode.

This invention belongs to the field of internal transport barrier technology and discloses a method for actively controlling the internal transport barrier of a tokamak plasma. This invention actively controls the pressure and current distribution of the plasma through electron cyclotron waves or other auxiliary heating methods, thereby altering the stability of the neoclassical tearing mode and ultimately achieving a magnetic island-free internal transport barrier operation mode. The control strategy is simplified: it eliminates the need for real-time precise measurement of the radial position and phase of the magnetic island, and also eliminates the need for real-time feedback control of the electron cyclotron wave deposition position and timing; only the injection power of the electron cyclotron wave in the core needs to be adjusted, making the system operation simpler. It also boasts high energy efficiency: depositing electron cyclotron waves in the plasma core, where heating and current-driven absorption efficiency are high, thus requiring relatively low injection power and offering better economic benefits.

The application discloses a portable angle adjusting mechanism for a cyclotron injection line, and relates to the technical field of injection lines.The portable angle adjusting mechanism comprises an injection line and a cover plate, and the bottom end of the injection line is provided with an installation adjusting mechanism.The installation adjusting mechanism comprises an installation plate, a rack, a fixing frame, an adjusting assembly and a positioning assembly.The installation plate is connected with the injection line, the rack is connected to the inner wall of an arc-shaped groove, the fixing frame is arranged at the top end of the cover plate, the adjusting assembly is arranged in the fixing frame, and the positioning assembly is arranged in the fixing frame.The installation plate can be adjusted at any angle by driving the rack through the matched arrangement of the installation plate, the rack, the fixing frame, the adjusting assembly and the positioning assembly, the rack is driven to rotate through a hand-cranking worm and gear structure, the adjusting precision of the angle of the injection line is improved, the fixing frame can be installed on the cover plate while the hand wheel in the adjusting assembly is clamped, and the portable angle adjusting mechanism is convenient to use.

This invention discloses an irregularly shaped internal rod connection structure for a desktop cyclotron accelerator. This structure connects the upper and lower ends of two internal rods in a high-frequency cavity, sharing a single internal rod at both ends, which is then connected to the cavity shell. Above the center plane, this irregularly shaped internal rod connection structure extends from the upper magnetic pole cover and is positioned within a protruding large cylinder outside the upper magnetic pole cover. Below the center plane, the same structure extends from the lower magnetic pole cover and is positioned within a protruding large cylinder outside the lower magnetic pole cover. The irregularly shaped internal rod connection structure forms symmetrical, non-concentric S-shaped semicircular connections at the upper and lower ends of the two internal rods in the high-frequency cavity, or symmetrical, concentric annular semicircular connections. By employing this irregularly shaped internal rod connection structure, this invention achieves a high quality factor while maintaining the cavity volume even with increased internal rod length. It strikes a balance between reducing volume to improve the quality factor and lowering the frequency.

The application discloses a multi-charge-state beam extraction device for a negative hydrogen ion cyclotron, which comprises the following steps: arranging a three-charge-state beam extraction device of protons, negative hydrogen ions and hydrogen atoms on the track of the accelerated beam to an extraction energy; or arranging a double-charge-state beam extraction device of protons and negative hydrogen ions; or arranging a double-charge-state beam extraction device of protons and hydrogen atoms; and the three-charge-state or double-charge-state beam extraction device is provided with a stripping target and / or an electrostatic deflection plate which are combined by stripping films with different thicknesses and different positions, the different position stripping films are used for online adjusting the proportion of each component beam, and the different positions refer to the front and rear positions and the radial positions of the plurality of stripping films on the track of the beam extraction. The application solves the problem that the prior art can only extract a single-charge-state beam and can only online adjust the total flow intensity of each charge-state beam but cannot adjust the flow intensity of each charge-state beam.

This invention provides a method for analyzing the closed orbit of a cyclotron, relating to the field of cyclotron design and optimization technology. The method includes: preprocessing the acquired raw particle orbit data of the cyclotron by removing noise and formatting it to obtain preprocessed orbit data; performing trajectory decomposition on the preprocessed orbit data using numerical analysis methods to obtain orbit decomposition data describing the particle's motion state; analyzing the motion characteristics of the orbit decomposition data to obtain analysis results including frequency, amplitude, and phase; and sorting the orbit decomposition data based on the analysis results to calculate the center point of the distribution. This invention improves the accuracy and data security of cyclotron closed orbit analysis.

The invention discloses an ultrahigh pressure air valve component unit performance test device and method, and the device comprises an ultrahigh pressure compression closed circulation system which comprises an ultrahigh pressure air cylinder, a plunger and an ultrahigh pressure air valve test component, and ultrahigh pressure air enters an air cylinder compression cavity through an air inlet pipeline along an air inlet channel; ultrahigh-pressure gas in the gas cavity compression cavity is exhausted to the ultrahigh-pressure pressure relief device through an exhaust channel, the ultrahigh-pressure pressure relief device is connected to the gas inlet pipeline through a bypass pipeline, and a cyclotron is arranged on the gas inlet pipeline, prepares the ultrahigh-pressure gas into radioactive gas and introduces the radioactive gas into the ultrahigh-pressure cylinder; a scintillation detector array is arranged outside the ultrahigh-pressure cylinder, covers the whole ultrahigh-pressure cylinder and is used for capturing the flowing range of radioactive gas in the ultrahigh-pressure cylinder. The device has the functions of accurate ultrahigh-pressure gas loading, adjustable cycle frequency, working performance monitoring and the like, so that effective experimental means and technical guarantee are provided for localization of key parts.

The application discloses a radiotherapy device, an accelerator maximum flow strength automatic search system and method. The system comprises a cyclotron with opposite first and second outlet ends, and is used for accommodating a first ion source and a second ion source opposite in length direction; the first ion source can move axially away from the second ion source; the second ion source can move axially away from the first ion source; a recording module records all first positions and second positions of the first and second ion sources, and obtains all position combinations corresponding to each first position and second position; a debugging module controls the first and second ion sources to move in positions respectively according to a preset step length; and the cyclotron is controlled to emit a beam under each position combination, and protons generated by the first and second ion sources are introduced, accelerated and led out; a storage module acquires a beam intensity corresponding to each position combination and forms a data set; and a search module searches for a maximum beam intensity from the data set, so that a better radiotherapy effect is ensured.