19 results about "Radio-frequency quadrupole" patented technology

The utility model provides a kind of proton acceleration system, neutron generating device and isotope generating device.The proton acceleration system includes radio frequency quadrupole acceleration module, at least has radio frequency quadrupole accelerator;Drift tube linear accelerator module, at least has drift tube linear accelerator.Based on the above-mentioned proton acceleration system, first by radio frequency quadrupole acceleration module to proton beam is accelerated to handle, so that the energy of proton beam reaches first energy value;Further energy adjustment processing is carried out to the proton beam of first energy value by drift tube linear accelerator module, so that the energy of proton beam reaches the second energy value that meets requirements.

Maintainability is to be improved. A radio frequency quadrupole linear accelerator includes a tubular housing part having an outer peripheral surface at which two pairs of openings extending in an axial direction are formed facing each other, and a plurality of first vane electrodes inserted into the respective openings of the tubular housing part from outside toward an axial center, detachably attached to the openings, and disposed facing each other.

The invention provides a linear injector system and a beam control method, and the system comprises a radio frequency quadrupole accelerator which comprises a first bunching segment disposed at the tail end of the radio frequency quadrupole accelerator, and the first bunching segment is used for carrying out the initial phase width compression of a beam; the at least one interdigital drift tube linear accelerator comprises at least one KONUS period, and each KONUS period sequentially comprises a second bunching section used for compressing the phase width of the beam from the upstream to obtain the beam subjected to phase width compression from the input end to the output end; the acceleration section is used for accelerating the beam current after the phase width compression at a constant synchronous phase to obtain an accelerated beam current; and the focusing section is used for focusing the accelerated beam on a plane perpendicular to the transmission direction to obtain a focused beam.

The application discloses a photochemical ionization time-of-flight mass spectrometry VOCs atmospheric on-line monitoring device and method, which comprises a complete ion generation and analysis system formed by a plurality of gas mixing cavities, photochemical ionization cavities, differential vacuum cavities, radio frequency quadrupole cavities, electrostatic lens cavities and TOF detection zones in series, and is equipped with an automatic gas path control system; the application integrates an intelligent closed-loop control system; the system uses a three-dimensional ion detection system to acquire time and space quality parameters of an ion beam in real time, combines with a current hardware state of the instrument, and calculates 12-dimensional hardware parameter adjustment instructions in real time through a convolutional neural network model; the application solves the performance drift problem of a traditional mass spectrometer caused by environmental changes through the construction of an intelligent closed loop of sensing-diagnosis-decision-execution, realizes the autonomous optimization, long-term stable and high-precision operation of the instrument, and significantly improves the automation level, accuracy and reliability of atmospheric VOCs on-line monitoring.

The invention provides a tuning method of a radio frequency quadrupole field accelerator cavity and a medium. The method comprises the following steps: acquiring an initial measurement result of four-quadrant electric field distribution in the radio frequency quadrupole field accelerator cavity based on a perturbation body; performing gravity error compensation on the initial measurement result to obtain a corrected measurement result; obtaining a dipolar field component and a quadrupolar field component in the cavity of the radio frequency quadrupolar field accelerator based on the correction measurement result; and judging whether the radio frequency quadrupole field accelerator cavity meets a tuning target or not based on the dipolar field component and the quadrupole field component, and if not, executing tuning operation until the tuning target is met. According to the invention, the gravity error generated by the perturbation method can be compensated, and the movement track of the perturbation body in the cavity of the radio frequency quadrupole field accelerator can be fitted, so that the accurate electric field distribution in the cavity can be simulated, and the accurate tuning can be realized.

The invention provides an octagonal radio frequency quadrupole acceleration cavity single-section cavity, a welding device and a welding method, and relates to the technical field of accelerators. The single-section cavity adopts a four-block design, namely, the single-section cavity is configured to be composed of a first vertical electrode, a first horizontal electrode, a second vertical electrode and a second horizontal electrode; the first vertical electrode and the second vertical electrode are each provided with a protruding structure in the direction facing the interior of the cavity, in other words, the protruding structures are designed to be W-shaped, and the protruding structures are configured to serve as geometric symmetry references to ensure that in the machining process, the machining precision is improved. The degree of symmetry of the first vertical electrode and the second vertical electrode relative to the first horizontal electrode and the second horizontal electrode meets a preset condition; and one of any two contacted electrodes of the first vertical electrode, the first horizontal electrode, the second vertical electrode and the second horizontal electrode is provided with a solder groove for filling solder. Compared with a traditional eight-block type design, the single-section cavity has the advantage that the machining precision of the cavity is greatly improved.

The invention relates to the technical field of particle accelerators, in particular to a self-adaptive control method and device of a radio frequency quadrupole field accelerator and a BNCT system. The self-adaptive control method comprises the following steps: acquiring a CT image and boron concentration distribution information of a patient; calculating by using a Monte Carlo method to obtain an optimal neutron beam parameter; initializing operation control parameters of the radio frequency quadrupole field accelerator; completing parameter calibration before boron neutron capture therapy; receiving beam parameters and patient positions monitored in the treatment process in real time, and predicting beam transmission rate and emittance in real time by using a beam dynamics prediction model; and according to a prediction result, adjusting operation control parameters of the radio frequency quadrupole field accelerator in real time to ensure that the deviation between the actual irradiation dose and the treatment plan prescription dose is less than or equal to 5%. The operation real-time optimization response speed of the radio frequency quadrupole field accelerator is effectively improved, the operation control parameters of the radio frequency quadrupole field accelerator can be adjusted in real time according to the patient state and the treatment process, and the treatment effect and safety are improved.

The application discloses a photochemical ionization time-of-flight mass spectrometry VOCs atmospheric on-line monitoring device and method, which comprises a complete ion generation and analysis system formed by a plurality of gas mixing cavities, photochemical ionization cavities, differential vacuum cavities, radio frequency quadrupole cavities, electrostatic lens cavities and TOF detection zones in series, and is equipped with an automatic gas path control system; the application integrates an intelligent closed-loop control system; the system uses a three-dimensional ion detection system to acquire time and space quality parameters of an ion beam in real time, combines with a current hardware state of the instrument, and calculates 12-dimensional hardware parameter adjustment instructions in real time through a convolutional neural network model; the application solves the performance drift problem of a traditional mass spectrometer caused by environmental changes through the construction of an intelligent closed loop of sensing-diagnosis-decision-execution, realizes the autonomous optimization, long-term stable and high-precision operation of the instrument, and significantly improves the automation level, accuracy and reliability of atmospheric VOCs on-line monitoring.

The invention relates to a compact proton linear accelerator compatible with conventional radiotherapy and flash therapy, and the accelerator comprises an ion source which generates a proton beam; the radio frequency quadrupole field accelerator comprises a first radio frequency quadrupole field accelerator and a second radio frequency quadrupole field accelerator, and the first radio frequency quadrupole field accelerator and the second radio frequency quadrupole field accelerator are spliced in a vacuum sealing mode through a flange; the side-coupled drift tube linear accelerator and the coupled cavity linear accelerator are sequentially arranged behind the radio frequency quadrupole field accelerator, and the ion source, the radio frequency quadrupole field accelerator, the side-coupled drift tube linear accelerator and the coupled cavity linear accelerator form a full-linear structure. The device has remarkable advantages in the aspects of treatment capacity, occupied area, construction scale and the like, and is more beneficial to popularization and application in a hospital environment.

The invention provides a preparation method of an octagonal radio frequency quadrupole field cavity electrode, and relates to the technical field of medical accelerators. The preparation method comprises the following steps: performing finish machining on one side of each electrode material according to a rough reference surface of each electrode material so as to determine an initial positioning surface and an initial modulation line of each electrode material; the actual position relation between the initial modulation line of each electrode material and the initial positioning face of each electrode material is determined, finish machining is carried out, and a target modulation line and a target welding face of each electrode material after finish machining are obtained; and according to the target modulation line and the target welding surface of each fine-machined electrode material, the multiple fine-machined electrode materials are welded, and the octagonal radio frequency quadrupole field cavity electrode is obtained.

The invention relates to the technical field of ion accelerators, in particular to a radio frequency quadrupole accelerator system. The radio frequency quadrupole accelerator system comprises a radio frequency quadrupole cavity which is formed by sequentially splicing a plurality of sub-cavity sections along the length direction of the radio frequency quadrupole cavity; the cavity bracket is arranged below the radio frequency quadrupole cavity and extends along the length direction of the radio frequency quadrupole cavity; the power source module is connected with the radio frequency quadrupole cavity and is used for providing energy for generating a radio frequency electromagnetic field; the water cooling module is used for cooling the radio frequency quadrupole cavity; the vacuum module is communicated with the cavity division section and is used for reducing the internal air pressure of the radio frequency quadrupole cavity; wherein the power source module comprises power couplers, feed tubes and a radio frequency power source, and the plurality of power couplers are installed on the cavity dividing sections in a one-to-one correspondence mode and are connected with the radio frequency power source through the feed tubes. The radio frequency quadrupole accelerator system is simple and uniform in structure, easy to maintain and stable in performance.

The invention relates to the technical field of particle accelerators, in particular to a radio frequency quadrupole field accelerator and a preparation process and application thereof. The radio frequency quadrupole field accelerator comprises a shell and four electrode plate assemblies, each electrode plate assembly comprises a mounting part and blades, a cooling channel is arranged between each electrode plate assembly and the shell, and the four blades face each other at the axis center of the shell to form an acceleration area; the blade is formed at a time by adopting an oxygen-free copper foil with the thickness of 0.1 mm-100 mm through a plastic forming process. The core performance indexes such as the resonant frequency precision and the quality factor of the radio frequency quadrupole field accelerator can be accurately regulated and controlled according to design requirements, and in actual verification, the resonant frequency precision reaches + / -0.01%, the quality factor Q value is larger than or equal to 8000, the beam transmission efficiency is larger than or equal to 98%, the working frequency is 162.5 MHz, and the output energy is 2.5 MeV. According to the preparation process, a complex integral mechanical cutting process is avoided, and the material and processing cost is effectively reduced.

The invention provides an auxiliary system for production of a single-section cavity of an octagonal radio frequency quadrupole acceleration cavity, and relates to the technical field of accelerators. The auxiliary device comprises a processing device used for fixing and supporting a radio frequency quadrupole accelerating cavity electrode in a processing stage; the electrode hoisting device is used for hoisting the processed radio frequency quadrupole acceleration cavity electrode; the electrode cleaning device is used for overturning the radio frequency quadrupole accelerating cavity electrode in the cleaning stage; the single-section cavity assembling device is used for assembling the cleaned radio frequency quadrupole accelerating cavity electrode to obtain a single-section cavity; the single-section cavity hoisting device is used for hoisting the assembled single-section cavity; the auxiliary system is configured to be capable of completing a production chain of electrode machining, electrode hoisting, electrode cleaning, single-section cavity assembling and single-section cavity hoisting under the synergistic effect of the machining device, the electrode hoisting device, the electrode cleaning device, the single-section cavity assembling device and the single-section cavity hoisting device.

The invention relates to the technical field of particle accelerators, in particular to a remote operation and maintenance type radio frequency quadrupole field accelerator system with an intelligent diagnosis function, which comprises a beam acceleration subsystem, a remote monitoring subsystem, an intelligent diagnosis and decision subsystem and a safety management and control subsystem. The remote monitoring subsystem comprises an equipment layer, an edge layer and a cloud layer, and the equipment layer obtains related data of coverage current, voltage, temperature, vacuum degree and vibration through a plurality of sensors arranged in the beam acceleration subsystem. The intelligent diagnosis and decision subsystem comprises a rule engine module, a machine learning model and a knowledge base module. The beam acceleration subsystem, the remote monitoring subsystem, the intelligent diagnosis and decision subsystem and the safety management and control subsystem cooperate to realize the whole-process remote online maintenance of the radio frequency quadrupole field accelerator system. According to the system, the remote maintenance efficiency and the safety controllability are effectively improved, and the operation and maintenance cost is reduced.

The application relates to the technical field of particle acceleration, and particularly discloses a high-repetition nanosecond beam pulsing system and method, wherein the high-repetition nanosecond beam pulsing system comprises, in sequence along a beam transmission direction, a direct current ion source, a low-energy beam transmission section, a radio frequency quadrupole field accelerator, a high-energy beam transmission section and a target chamber, adopts a three-stage structure of 'front-end pulsing + middle-stage acceleration + rear-end purification', and is helpful to stably realize high-repetition, nanosecond narrow pulse width output; through pre-chopping and post-bunching, the pulse width is ensured, and invalid particles are reduced to enter a subsequent acceleration channel; the working frequency of the radio frequency chopper is half of the target pulse repetition frequency, the difficulty of synchronous control can be reduced, time sequence accuracy and phase synchronization can be ensured, beam loss and phase disorder can be avoided, pulse time sequence consistency can be ensured, and beam utilization rate can be improved; and the high-repetition nanosecond beam pulsing is stably ensured.

The invention discloses a multi-parameter high-precision cold state test device for a radio frequency quadrupole accelerator, which relates to the technical field of particle accelerator testing and comprises a leveling system, a measuring platform and a control system. And the leveling system is provided with a plurality of test fixtures capable of axially adjusting intervals and a lifting mechanism, and is used for fixing and automatically leveling the RFQ cavity. The two measuring platforms are arranged at the two ends of the leveling system respectively and provided with rope traction mechanisms with perturbation blocks. The control system integrates, measures and controls the industrial personal computer, the network analyzer and other units, synchronously controls automatic leveling of the cavity, movement of the perturbation block and frequency sweeping testing, and automatically collects and calculates a plurality of parameters such as resonant frequency, quality factor, field distribution, phase and mode spectrum in one-time clamping. Leveling, automatic measurement and integrated control are combined, and compared with the problems that traditional testing is tedious in operation, low in precision and poor in universality, the efficiency, precision and repeatability of RFQ cavity cold state testing are improved.

The application provides a method for rapidly detecting VOCs in incineration flue gas by using a photoionization time-of-flight mass spectrometer. The method first establishes a standard curve of each component of VOCs in the incineration flue gas by using the photoionization time-of-flight mass spectrometer, then the photoionization time-of-flight mass spectrometer is used for real-time sampling and detection of the incineration flue gas sample, the sample ions are transmitted to a high-resolution reflective time-of-flight mass analyzer through a radio frequency quadrupole and an electrostatic ion transmission system, and are separated and detected according to the time-of-flight difference to the detector. The mass spectrum of each component of VOCs in the detected incineration flue gas is compared with the mass spectrum of the standard gas of each component of VOCs in the incineration flue gas, and the actual concentration of each component of VOCs in the incineration flue gas is calculated according to the standard curve of each component of VOCs in the incineration flue gas. The method can realize high-sensitivity, high-accuracy and full-coverage online monitoring of VOCs in the flue gas in the industrial incineration site, does not need to collect, purify, concentrate and other steps for the flue gas sample, and can realize real-time feedback of VOCs in the incineration flue gas.

This invention relates to a four-wing type radio frequency quadrupole accelerator cavity with detachable electrodes, comprising a cavity, electrodes, a sealing assembly, and an end plate, wherein the end of the cavity is open. The electrodes are disposed inside the cavity and are detachably connected to the cavity via fasteners. The sealing assembly seals the installation gap between the cavity and the electrodes, and the end plate seals the end of the cavity. Compared with existing technologies, in this invention, the electrodes are detachably connected to the cavity, resulting in a modular design. In practical use, when arcing causes electrode damage or beam contamination on the electrodes, leading to a decrease in the accelerator cavity's radio frequency performance, the user can quickly restore the accelerator's high-frequency performance by disassembling and replacing the electrodes, eliminating the need to rebuild the entire accelerator. Therefore, this accelerator cavity has the advantages of easy disassembly and replacement.