24results about "Magnetic resonance accelerators" patented technology

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 application provides a synchronous accelerator multi-harmonic beam trajectory reconstruction method and system, and relates to the technical field of accelerators. The method comprises the following steps: obtaining an accelerating cavity high-frequency signal of the synchronous accelerator, so as to generate a frequency-synchronized reference waveform according to the accelerating cavity high-frequency signal; setting a phase trigger window based on the reference waveform, so as to control the synchronous acquisition of beam signals of a full ring of the synchronous accelerator by a beam diagnosis device of the full ring; performing time domain analysis on the beam signals to obtain an effective beam signal interval, so as to calculate position data of the beam signals based on the effective beam signal interval; and reconstructing the motion trajectory of the beam according to the position data of the beam signals, which can accurately identify and associate the data of the same beam in the multi-harmonic acceleration process.

This invention provides a magnet array holder and assembly method that accelerate assembly and improve alignment in vacuum electronic devices. [Solution] A magnet array holder 202 is configured to hold magnetic and / or non-magnetic components in order to form a magnet array, wherein the magnet array is configured to operate one or more electron beams within a vacuum electronic device when assembled, and the magnet array holder 202 comprises a set of slots 214 configured to receive magnetic and / or non-magnetic components, a set of pockets 216 for receiving magnetic and / or non-magnetic components, and one or more mounting interfaces configured to connect the magnet array holder 202 to a vacuum electronic device.

This beam adjustment mechanism can be applied to a circulating ring that increases the valences while circulating particles. The circulating ring has: a first trajectory part that has a linear trajectory of one beam including particles having different valences, and has a stripper for increasing the valences of the particles; and a second trajectory part that has a plurality of trajectories of beams corresponding to the valences of the particles. The beam adjustment mechanism has, in the second trajectory part, a plurality of slit formation members that form slits for narrowing the beams in the plurality of trajectories. Each of the slit formation members has a substantially U-shape when viewed in the traveling direction of the corresponding beam, and changes the orientation of a recess relative to the beam by being rotated about a drive shaft, thereby changing the amount of aperture. The drive shaft and the direction in which the beam is narrowed intersect each other.

The application provides an ECRH system anode high-voltage power supply soft starting method and system, belongs to the field of ECRH system auxiliary power supply control, verifies that the voltage target value is greater than the output voltage starting value and no fault exists, and a timing control cycle is started; S2, an output voltage set value is calculated according to an exponential asymptote trajectory, whether the difference between the output voltage set value and the voltage target value is not more than a deviation threshold value is judged, if yes, the voltage target value is written into a DAC register; if no, S3 is entered; S3, whether the difference between the output voltage set values of two adjacent step periods exceeds a single-step limiting value is judged, if yes, the output voltage set value is limited, the step limiting value is written into the DAC register, the next step period is waited for and S2 is executed; if no, the output voltage set value is written into the DAC register, the next step period is waited for and S2 is executed; the problems of poor operation consistency and sudden voltage rise endangering device safety existing in manual voltage climbing are solved.

The application relates to the technical field of accelerators, and provides a remote water supplement device and a remote water supplement method of a cyclotron. The device comprises: multiple power units arranged in flow channels corresponding to water sources; a channel selection unit used for connecting a single water source in multiple water sources to a single target head in multiple target heads; wherein the flow channels of different water sources are independently arranged; an interaction unit used for receiving a target water source instruction and a target target head instruction; and a control unit in communication connection with the interaction unit, the multiple power units and the channel selection unit, used for controlling the power units corresponding to the target water source to be started according to the target water source instruction, and controlling the channel selection unit to select the flow channel where the power unit is arranged to be connected to the target target head according to the target target head instruction. The application solves the problems of high radiation exposure risk of personnel, frequent start and stop of self-shielding devices, complicated operation and easy errors, and easy waste of expensive water sources.

The application provides a method for simultaneously compensating average field and first harmonic error of a cyclotron, which comprises the following steps: calculating a main magnetic field compensation matrix A of the cyclotron through finite element model simulation, wherein the A is a compensation matrix A covering all functions of isochronous error and first harmonic error caused by cutting each cutting point of each magnetic pole based on finite element model calculation; solving a compensation equation: wherein a total error matrix b comprises an average field change matrix and a first harmonic change matrix β of each cutting point; the compensation matrix A is a compensation matrix A of a function relationship of magnetic field change caused by cutting each cutting point of each main magnetic pole according to finite element model calculation; and X is a cutting amount matrix, which is a matrix of required cutting amount of each cutting point of each main magnetic pole calculated according to the known b and the known A. The application simultaneously compensates isochronous magnetic field error and first harmonic magnetic field error of each cutting point, and effectively improves the compensation efficiency.

The application provides an angle-variable chamfer pad structure for a desktop cyclotron, and belongs to the technical field of small cyclotrons. The angle-variable chamfer pad structure is characterized in that: the structure is formed in a mode that the fixed cutting height H and length L and the variable chamfer cutting angle are adopted, so that the cutting volume of the chamfer pad and the pad amount are in linear relationship; the cutting volume and the pad amount are in linear relationship, that is, the side surface of the side adjacent to the high-frequency cavity is divided into two parts, the lower part is a long rectangular vertical plane penetrating the small radius to the large radius of the insert strip, and the upper part is a curved surface with an inward opening chamfer adjacent to the upper edge line of the long rectangular vertical plane; and the application solves the problem that the increasing of the main magnetic pole opening angle of the desktop cyclotron causes the high-frequency cavity installation space to be nervous or even occupied by adopting the mode that the fixed cutting height H and length L and the variable chamfer cutting angle are adopted.

A particle beam therapy device that irradiates a patient with a cation beam to perform treatment, the device including a passage selection unit that selectively passes through the cation beam among a mixed beam in which the cation beam and other species of a beam having a nuclide different from that of the cation beam are mixed after passing through a deflection magnetic field, after causing the mixed beam to pass through the deflection magnetic field, in a case where the other species of the beam is generated from the cation beam.

The application discloses a kind of strong current proton cyclotron production 225 Ac- 22 Na- 68 Method for producing Ge isotopes, comprising the following steps: selecting a plurality of target nuclides capable of fully utilizing the accelerator energy interval; each nuclide produces an energy interval corresponding to the production of two target nuclides, and the reaction cross-section peak region of one of the target nuclides corresponds to the reaction cross-section valley region of the other target nuclide; selecting target materials and shells for producing different target nuclides in different nuclide production energy intervals, in the same nuclide production energy region, the reaction cross-section peak region of the target nuclide produced by the target material corresponds to the reaction cross-section valley region of the target nuclide produced by the shell; or in the same nuclide production energy region, the reaction cross-section peak region of the target nuclide produced by the shell corresponds to the reaction cross-section valley region of the target nuclide produced by the target material; The present application converts the original radioactive waste into valuable products, reduces the production and processing cost of radioactive waste, and realizes the recycling of resources.

This invention relates to the field of proton cyclotron accelerator technology and discloses a shallow valley-type main magnet for a compact cyclotron accelerator, comprising a magnetic yoke, a cover plate, a magnetic pole base, magnetic pole bodies, and inserts assembled sequentially. The magnetic yoke adopts a horizontal square structure. In this invention, the magnetic yoke adopts a horizontal square structure, and the dovetail groove design of the bottom positioning block enables rapid and accurate positioning of the equipment without the need for additional pit excavation, significantly reducing the difficulty of pre-installation construction and site modification costs. Combined with the shallow valley design of the magnetic pole base, which reduces the valley depth and raises the valley magnetic field, the average magnetic field strength of the main magnet is significantly improved while ensuring the magnetic field gradient required for isochronous particle acceleration. With the compact circumferential distribution of eight separate fan-shaped magnetic pole bodies, the overall size of the equipment is effectively reduced, successfully adapting to scenarios with strict space constraints, such as medical radionuclide production and small-scale scientific research experiments.

To provide an accelerator capable of simplifying a cooling structure.SOLUTION: A coil vacuum vessel 24 encloses an acceleration space 20 in which charged particles are accelerated and the acceleration space 20 is maintained in a vacuum. The heat-generating devices are placed inside the coil vacuum vessel 24. A heat sink 61 for cooling the heat-generating devices is formed as a part of the coil vacuum vessel 24.SELECTED DRAWING: Figure 4

Title: HIGH-INTENSITY MULTI-PARTICULAR CYCLOTRON FOR THE INDUSTRIAL PRODUCTION OF α AND β- RADIONUCLIDES. The invention relates to a cyclotron for the production of α or β- emitting radionuclides. The cyclotron, with a magnetic periodicity of 3, comprises three accelerating cavities connected at the center, thus eliminating the need for phase control between the cavities, forming a single high-frequency resonator. The 6 accelerating spaces per revolution allow for rapid acceleration (the angle ϕ between the accelerating spaces of each cavity is approximately 30°), essential for acceleration in the 3rd and 6th harmonics. This cyclotron preferably has an injection system (31) powered by various types of ion sources, enabling the efficient acceleration of charged particles with Z / A ratios of 1 / 2 and 1 / 4.The cyclotron can also be equipped with stripping extraction devices positioned within it to extract charged particles and double their charge state. These particles allow for the execution of a range of nuclear reactions for the production of α- and β-emitting radionuclides. See Figure 4B for the abbreviation.

Magnet assemblies, e.g., dipole magnet assemblies, with integrated charged particle beam dumps and systems containing the same are described. Examples of a dipole magnet assembly include a dipole bending magnet and a channel assembly configured with a charged particle beam dump. The dipole magnet can be configured to generate a uniform magnetic field within the channel assembly that bends a trajectory of a charged particle beam. The channel assembly can be configured to support a vacuum for the charged particle beam while absorbing secondary-state particles using the charged particle beam dump. The charged particle beam dumps can be releasably secured to the channel assembly, welded to the channel assembly, or inserted into the channel assembly. Each charged particle beam dump can utilize an active cooling system such as cooling tubes or an embedded cooling channel to mitigate excessive heat generation from secondary-state particle absorption. Materials are also described.

The invention relates to a cyclotron enabling the production of α or β-emitting radionuclides.

The application discloses a built-in vacuum exhaust pump of a compact strong current cyclotron, and has the characteristics that the built-in vacuum exhaust pump utilizes the spatial position of a valley area of the cyclotron, penetrates into the valley area from a lower cover plate of the cyclotron, is inserted upwards in the valley area to the vicinity of a central plane of the cyclotron, and directly exhausts vacuum to the central plane of the cyclotron. The built-in low-temperature pump structure design is adopted, 1) the space of the valley area of the cyclotron is reasonably utilized, the condensation and adsorption area of a cold umbrella is doubled, the gas adsorption saturation capacity of the cyclotron is also doubled, the continuous working time of the low-temperature pump is prolonged, and the regeneration frequency is reduced; 2) compared with an external low-temperature pump, the effective exhaust speed of the low-temperature pump is improved because of no limitation of a through guide; and 3) the overall size of the cyclotron can be greatly reduced, and the protection cost of the cyclotron is reduced.

The application designs a method for producing Mo isotopes by using a target and a shell in a strong current proton cyclotron 68 Ge- 88 Zr- 93m The method comprises the following steps: selecting multiple target nuclides capable of fully utilizing the energy interval of the accelerator; producing two target nuclides corresponding to the energy interval of each nuclide, wherein the reaction cross-section peak region of one target nuclide corresponds to the reaction cross-section valley region of the other target nuclide; selecting the target and the shell for producing different target nuclides in different nuclide production energy intervals, and in the same nuclide production energy region, the reaction cross-section peak region of the target for producing the target nuclide corresponds to the reaction cross-section valley region of the shell for producing the target nuclide; or in the same nuclide production energy region, the reaction cross-section peak region of the shell for producing the target nuclide corresponds to the reaction cross-section valley region of the target for producing the target nuclide. The capsule cascade target maximizes the production of radioactive isotopes, reduces the irradiation cost of the accelerator operation, and improves the production efficiency of isotopes.

An ion source 3 includes a discharge chamber 36 for generating ions, gas pipes 24 and 25 for supplying a sample gas to the discharge chamber 36, and an extraction hole 37 for extracting the ions from the discharge chamber 36, and at least two discharge chambers 36 are arranged side by side. As a result, provided are a circular accelerator, a particle therapy system, and an ion source in which an operation rate and maintainability of an apparatus are improved as compared with the related art.

The present invention provides a target irradiation system that allows the target to be removed from the irradiation device and the radioactive isotope to be quickly dissolved in a dissolution device, and a method for recovering radioactive isotopes from a solid target. [Solution] The transport device 22 transports the solid target 10 from the target irradiation device 20, where the charged particle beam B is irradiated onto the solid target 10, to the dissolution device 21, which recovers the radioactive isotopes. Here, the target irradiation device 20 and the dissolution device 21 are located in a cyclotron chamber 152 provided in the building 150. Therefore, both the process of irradiating the solid target 10 with a charged particle beam and the process of recovering the radioactive isotopes by dissolution are performed in the cyclotron chamber 152. Thus, the solid target 10 can be removed from the target irradiation device 20 and the radioactive isotopes can be quickly dissolved in the dissolution device 21.

This utility model relates to the field of vacuum environment technology for medical systems. It proposes a vacuum system and a proton therapy system, including a vacuum chamber, a forepump, a system roughing valve, a high-vacuum pump, a forepump valve, a high-vacuum valve, a gas tank, an exhaust valve, a leak detection valve, a first low-vacuum gauge, a second low-vacuum gauge, a high-vacuum gauge, and a control unit. The control unit's various actuators are communicatively connected to control the operation of each component, thereby switching operating states. All control components are connected to the control unit, enabling faster and more efficient acquisition and restoration of vacuum levels. Especially during the installation and commissioning of cyclotrons, it significantly reduces system downtime caused by vacuum restoration. This not only improves the working efficiency of the cyclotron but also shortens the commissioning and maintenance cycle, thereby improving the overall system operating efficiency.

To provide a circular accelerator capable of extending the charge storage time compared to conventional methods, a particle therapy system, and a control method of the accelerator.SOLUTION: An accelerator 1 is an accelerator that accelerates beam particles using a frequency-modulated high-frequency accelerating electric field to change the orbital radius of the beam particles orbiting in the magnetic field which changes with energy. At least one charge storage coil 301 is provided vertically above or below the beam trajectory of the beam particles, which controls the dynamic magnetic field generated within the installation range so that the circular frequency of the beam particles changes.SELECTED DRAWING: Figure 3

A target carrier assembly includes a housing, a target, and a collimator. The housing includes a collimator compartment and a target compartment divided by a vacuum window foil, the collimator being removably disposed within the collimator compartment, and the target being disposed within the target compartment. The collimator compartment is attached to a cyclotron beam line in the irradiation position, and the target compartment is in fluid communication with a cooling fluid supply line and a cooling fluid return line in the irradiation position. The target is cooled by the cooling fluid from the cooling fluid supply line. The collimator directs a particle beam from the cyclotron beam line to irradiate the target and includes a beam entry diameter and a beam exit diameter. The collimator is in thermal contact with the collimator compartment.

The application belongs to the technical field of particle accelerators, and discloses a magnetic alloy high-frequency system, which comprises a magnetic alloy loading cavity and a power source. The magnetic alloy loading cavity comprises a cavity shell, an inner conductor assembly, a wall-penetrating assembly and a feed electrode. The inner conductor assembly is coaxially arranged in the inside of the cavity shell. The wall-penetrating assembly is sealingly connected to the periphery of the cavity shell. The feed electrode is electrically connected to the inner conductor assembly after penetrating the wall-penetrating assembly. The number of the wall-penetrating assembly and the feed electrode is both two and they are one-to-one corresponding. The two feed electrodes are arranged at an interval of 90 degrees along the circumference of the cavity shell. The power source is connected to the cavity shell through a power transmission pipeline. A high-frequency transmission body is arranged in the power transmission pipeline. One end of the high-frequency transmission body is connected to the feed electrode, and the other end of the high-frequency transmission body is connected to the power source. The magnetic alloy high-frequency system provided by the application significantly increases the physical creepage distance between the two high-voltage feed electrodes, and effectively reduces the probability of spark between the poles in the compact space.