42 results about "Particle accelerator" patented technology

The application discloses a strip type NEG (Non Evaporable Getter) pump for a particle accelerator and a use method thereof. The pump comprises a getter assembly, a fixing part, a vacuum flange and an electrode. One end of the getter assembly is provided with the fixing part, the fixing part is fixedly connected with one side of the vacuum flange, the other side of the vacuum flange is provided with the electrode, and the getter assembly is electrically connected with the electrode. The getter assembly comprises two or more getter strips, each getter strip is arranged side by side and fixedly connected with the fixing part at one end, and a gap is reserved between two adjacent getter strips. The use method is that the strip type NEG pump is inserted into a vacuum chamber along the axial direction of the vacuum chamber and then fixedly installed, each getter strip is parallel to the axis of the vacuum chamber, the vacuum flange is fixedly installed with the side wall of the vacuum chamber, and the electrode is externally connected with a power supply device. The application can effectively improve the uniformity of vacuum distribution, maintain a high vacuum degree, avoid misfiring of a beam, has a simple structure, is convenient to install, and can be adapted to the installation requirements of the accelerator vacuum chamber in a large range.

The application belongs to the technical field of vacuum equipment maintenance, and specifically discloses a molecular pump automatic purging pre-cleaning system and method. The system comprises a detection module, a control module and an execution module. The detection module collects flow, pressure, temperature and vibration parameters in real time through various sensors, obtains a pollution index PI through normalization and weighted operation, and accurately determines the pollution grade. The control module combines PID and fuzzy control algorithms and dynamically generates cleaning instructions in combination with an adaptive learning strategy. The execution module uses high-purity inert gas to complete the purging operation. The application solves the problems of low efficiency, unstable effect, easy damage to equipment and poor universality of traditional manual cleaning, can automatically adjust the cleaning cycle according to the load of the molecular pump, and has good hardware and software compatibility. The scheme has high automation degree and good cleaning effect, can reduce operation and maintenance cost and prolong the service life of the equipment, and is suitable for high-vacuum scenes such as semiconductor manufacturing, vacuum coating and particle accelerators.

This invention provides a multi-cavity tuner control system and method for high-frequency cavities in particle accelerators, belonging to the field of particle accelerator technology. The system includes: a field-programmable gate array (FPGA) communicatively connected to multiple high-frequency cavities, used to acquire cavity sampling signals and incident reference signals from the multiple high-frequency cavities, and generate corresponding phase difference information for the high-frequency cavities based on the cavity sampling signals and incident reference signals; an embedded computer communicatively connected to the FPGA, used to generate control commands based on the phase difference information; and multiple tuner actuators, each corresponding to a high-frequency cavity, which are communicatively connected to the embedded computer via an industrial Ethernet bus, used to adjust the resonant frequency of the corresponding high-frequency cavity according to the control commands. This invention achieves high-precision, high-synchronization, and automated tuning of the multi-cavity tuner.

The application provides a method and device for transverse feedback of beam current in a storage ring. It relates to the field of particle accelerators. The method for transverse feedback of beam current in a storage ring comprises: using a plurality of electrodes of a beam position probe to synchronously collect signals of beam bunches in the storage ring to obtain a plurality of BMP beam original signals; for a plurality of instability modes of the beam bunches in the storage ring, respectively performing band-pass sampling on the plurality of BMP beam original signals to obtain a plurality of ADC band-pass sampling signals; based on the respective spatial dimensions to which the plurality of ADC band-pass sampling signals belong, respectively performing phase shift processing on the plurality of ADC band-pass sampling signals by using an impulse response filter of the corresponding spatial dimension to obtain a plurality of beam current phase shift signals; performing gain control based on a feedforward reference gain of the beam bunches and the plurality of beam current phase shift signals to obtain beam current feedback signals; and based on the plurality of beam current feedback signals, applying damping force to the beam bunches by a beam impactor to suppress the instability modes of the beam bunches.

This invention relates to the field of particle accelerator technology, and more particularly to a beam terminal membrane window, a beam terminal, and a particle accelerator. The beam terminal membrane window includes a pressure plate, a sealing plate, an isolation membrane, and a sealing protection structure. The sealing protection structure is located on the sealing plate and at the edge of the working window. The sealing protection structure includes a transition surface and at least two levels of protective recesses. The sealing protection structure is used to seal the isolation membrane between the sealing plate and the pressure plate, utilizing the various levels of protective recesses to reserve space for the recessed isolation membrane from the sealing connection surface to the vacuum environment side, forming a stepped space. The stepped space and the transition surface work together on the working window to achieve a synergistic effect of sealing and space protection. Under conditions of large scanning area and highly uniform beam passage, this beam terminal membrane window can seal and isolate the inside and outside of the accelerator device, ensuring reliable particle beam passage and effectively improving the sealing performance and safety of the accelerator device.

This invention discloses a high-voltage, high-current optically controlled solid-state switch assembly based on dual isolation, relating to particle accelerators, pulsed power, and power electronics. It includes: a synchronous triggering system, isolated laser driving units, a series group of laser diodes, and optically controlled multi-gate thyristors. An external trigger signal first enters the synchronous triggering system, converting the initial external trigger signal into multiple nanosecond-level synchronous weak light trigger signals. These weak light trigger signals are losslessly transmitted to each isolated laser driving unit. Upon receiving the weak light trigger signal, the isolated laser driving unit amplifies the energy through an internal high-speed power semiconductor switch, outputting an electrical pulse. The electrical pulse is transmitted via a coaxial transmission line to the series group of laser diodes, which converts the electrical pulse into a trigger light spot. The trigger light spot matches the optical window of the optically controlled multi-gate thyristor, completing the photoelectric conversion and driving the thyristor to conduct. A static voltage equalization and protection system is connected in parallel across each optically controlled multi-gate thyristor.

The application discloses a transverse feedback excitation device with high shunt impedance and horizontal light extraction, and belongs to the technical field of particle accelerators. The device comprises a beam position probe (BPM), an RF front end, an ADC module, a digital signal processing module, a DAC module, a power divider, a power amplifier, a low-pass filter, an exciter (Kicker) and a matching load. The exciter Kicker has four electrode strips located on both sides of the beam center line and parallel to each other, two electrode strips on the same side are connected in parallel, the characteristic impedance of a single electrode strip is 100Ω, and the equivalent total characteristic impedance after parallel connection is 50Ω; the four electrode strips are distributed in a quadrangular symmetry in the cross section of the vacuum chamber and avoid the horizontal median plane, so as to form an open light path channel. The application improves the shunt impedance of the exciter, reduces the radio frequency power demand, realizes impedance matching with a standard 50Ω system, and guarantees the horizontal unobstructed extraction of the synchrotron radiation light.

The application discloses a particle accelerator operation control method, device, system, equipment and medium, relates to the particle accelerator control technical field, and through the global configuration parameter package as a unified driving source, the multidimensional control subsystem is real-time collaborative scheduling, so that the multidimensional control subsystem independently runs in parallel under the premise of not interfering with each other. Wherein the method comprises: according to the operation plan of the particle accelerator, the global configuration parameter package is generated in advance;Under the driving of the global configuration parameter package, the multidimensional control subsystem is collaboratively scheduled, so that the multidimensional control subsystem independently and in parallel executes corresponding control logic, and obtains parallel output information;Combining the current beam state, the parallel output information of the multidimensional control subsystem is fused to obtain a beam control decision;The beam control decision is issued to the execution equipment, so that the execution equipment triggers corresponding beam control actions according to the beam control decision.

Proton therapy system (1) for treating a patient (2) by means of proton radiation (3), comprising a particle accelerator (4) for generating a proton beam, a movable patient table (5) for holding and positioning a patient (2), a beam guidance device comprising several electromagnets (6) for focusing and / or defocusing and / or deflecting the proton beam (3), and a gantry (7) rotatable about a horizontal axis of rotation (R) for directing the proton beam (3) onto a target volume within a patient (2) held on the patient table (5), wherein the proton beam (3) has a maximum energy of less than 180 MeV, and the beam guidance device comprising a first scanner magnet (8A) and a second scanner magnet (8B) arranged in the direction of the proton beam behind the first scanner magnet (8A) for deflecting the proton beam (3), as well as a Proton beam direction between the scanner magnets (8A,8B) has a deflection magnet (9) arranged, wherein the deflection magnet (9) is configured to focus the proton beam (3) at the magnet input (9.1) in the plane of the beam deflection by the first scanner magnet (8A).

The application discloses a kind of particle accelerator beam calibration system and calibration method, wherein, particle accelerator beam calibration system includes support assembly, particle accelerator and calibration component;Particle accelerator is provided with rotation axis and is used for emitting beam's beam outlet, and the particle accelerator is connected with the support assembly and can be rotated under the drive of support assembly;Calibration component is installed to the particle accelerator and can follow the rotation of the particle accelerator, one end of the calibration component extends to the isocenter of the calibration system horizontally and forms indicating part, and the indicating part can indicate the isocenter position corresponding to the particle accelerator;Pit is communicated with the space above ground to constitute the rotation space of calibration component.The particle accelerator beam calibration system and calibration method of the application are used to pre-commissioning for particle accelerator beam, reduce the commissioning period of particle accelerator when installing in hospital, and benefit the people faster to put into use for particle accelerator.

The present application relates to the technical field of magnet of particle accelerator, and provide a kind of permanent magnet type magnet for beam probe, permanent magnet type magnet includes magnet frame and permanent magnet assembly, the inner periphery side of magnet frame forms square hole;Permanent magnet assembly is set to the inner periphery side of the magnet frame, the permanent magnet assembly is in contact with the magnet frame to form closed magnetic circuit, and the inside of the permanent magnet assembly generates single direction magnetic field.The present application solves the defect that the structure of electromagnet is more complex on the beam probe, the aperture of permanent magnet assembly is large, with high-precision and high-quality magnetic field.Magnetic field precision and magnetic field quality are guaranteed by the machining precision of permanent magnet block and the installation distribution position, using permanent magnet excitation, without water cooling system, equipment maintenance is simple, zero power consumption.Adopting the size and position of permanent magnet block are optimized to adjust the precision and quality of magnetic field, which is convenient and simple.

This invention discloses an accelerating tube for a high-pressure particle accelerator, relating to the field of high-pressure equipment technology. It includes a tube body with standard high-vacuum metal flanges welded to its upper and lower ends. The tube body has through-holes for mounting ceramic support columns, composite electrode columns, and electrode plates. A voltage divider resistor is also mounted on the composite electrode column through through-holes. This invention employs a one-piece tube body, increasing the mechanical strength of the device. The use of similar components ensures welding quality and reduces the occurrence of issues such as cracking at joints that affect the device's performance. The vacuum level inside the accelerating tube, the stability of the accelerating tube, and its service life are all improved. The electrode plates are fixed and positioned by the composite electrode columns and ceramic support columns, making it easier to ensure accurate alignment between the electrode plates and the center point of the accelerating tube. Furthermore, the gap between the electrode plates and the tube body helps to create a relatively uniform vacuum environment, which helps suppress arcing within the accelerating tube.

This invention relates to a testing apparatus and method for a rotating target used in particle accelerators. The testing apparatus for the rotating target includes a vacuum system, a power loading system, a drive control system, a cooling system, and a sensor and data acquisition system. The rotating target is mounted within a vacuum testing chamber using a fixed bracket. The stator of a motor that drives the target's rotation is mounted on the fixed bracket, while the rotor is fixed to the target. The target is driven by induction via the drive control system. The motor stator generates a rotating magnetic field through a power supply to drive the rotor, thereby driving the target to rotate at high speed. By establishing extreme operating environments such as high vacuum, high temperature, and high radiation for the rotating target, simulating actual working conditions, and by testing parameters such as rotational speed, acceleration, and displacement, the performance and reliability of the rotating target or bearing are comprehensively evaluated, thereby improving the design optimization of the rotating target or bearing.

The present application relates to the technical field of particle accelerators, in particular to a method for preparing a composite coating on the inner wall of a vacuum pipe and a vacuum pipe. The preparation method comprises: roughening the inner wall of the vacuum pipe; coaxially installing the treated vacuum pipe in a solenoid of a magnetron sputtering coating device; using a magnetron sputtering coating process to coat an Au film on the inner wall of the vacuum pipe; and using a magnetron sputtering coating process to coat a TiZrV film on the side of the Au film away from the vacuum pipe. In the present application, the Au / TiZrV double-layer film is coated on the inner wall of the vacuum pipe, so that a double-layer structure of a dense barrier layer and an active getter layer is formed on the surface of the vacuum pipe, which can effectively block the diffusion of the gas of the pipe wall material into the vacuum system by using the dense characteristics of the Au film, and can also make the TiZrV film fully play the gettering efficiency, thereby reducing the beam bombardment desorption rate of the vacuum pipe.

The application relates to the technical field of particle accelerators, in particular to a high-precision scanning magnet suitable for low-field ultra-high frequency. The scanning magnet comprises a magnet module provided with a core assembly and a coil assembly; a support module provided with a support base, a first support assembly and a second support assembly; the first support assembly and the second support assembly are respectively in sliding connection with the support base and arranged in a straight line, the core assembly is fixed to the first support assembly, the coil assembly is fixed to the second support assembly, and the core assembly and the coil assembly are not in contact with each other. In the application, the structure of the scanning magnet is optimized, different support assemblies are used to independently support the core assembly and the coil assembly, high-frequency vibration of the coil assembly can be avoided to cause damage to the core assembly under the condition of ultra-high frequency operation, the magnetic field precision of the scanning magnet can be improved, and therefore the scanning magnet can stably and accurately scan the particle beam for a long time.

The application discloses a complex equipment digital twin security control method and system based on a hierarchical trust architecture and a heterogeneous redundant double channel. The method constructs a closed-loop control system of "hierarchical trust authorization-heterogeneous redundant double channel review-absolute conservative veto-safety smooth rollback-certificate tamper-proof audit" around the security risks of large complex equipment in the landing of AI assisted decision making. Through the introduction of distribution outside detection and prediction uncertainty evaluation in the sandbox deduction channel, and the time alignment and time delay compensation of the space-time difference of the double channel, when unknown working conditions, high uncertainty or synchronization error exceed the threshold, the interception and rollback are triggered, so as to inhibit the potential risks brought by the excessive self-confidence of the model. The method is suitable for the safe and intelligent operation and maintenance scene of high-value and high-risk equipment such as large telescopes, phased array radars, precision lithography equipment and particle accelerators.

This invention discloses a method for mutual aiming and measurement of laser trackers in hidden areas, belonging to the field of large-space precision measurement technology. The invention deploys a reference tracker in the visible area and the tracker under test in the hidden area. The tracker under test drives a target sphere to perform spherical motion, while the reference tracker collects data from spherical sampling points. A robust Taubin sphere center fitting algorithm is used to fit the rotation center coordinates of the tracker under test, completing self-calibration. Finally, coordinate system transformation achieves measurement and coordinate unification in the hidden area. The robust Taubin sphere center fitting algorithm of this invention introduces robust estimation concepts, effectively suppressing the influence of abnormal data on the fitting results through weighted iterative optimization of the objective function. This invention completely solves the technical problems of not being able to deploy a common visible point and achieve coordinate system unification in hidden / narrow areas, significantly improving the accuracy and robustness of sphere center fitting, and meeting the collimation requirements of high-end devices such as particle accelerators.

The application relates to the field of particle accelerators and nuclear power plant cooling technology, and discloses a cooling device suitable for high-power rays, which comprises an absorber assembly, a cooling water system assembly, a vacuum tube assembly, a shielding body assembly and a supporting assembly. The absorber assembly is welded by brazing process from internal graphite and external copper, the copper is provided with a gas hole penetrating into the graphite layer, the gas hole is connected with an internal air cavity of the graphite, and a vacuum sealed cavity is formed. The cooling water system assembly comprises a water distributor designed with two layers of water inlet ring cavities and two layers of water outlet ring cavities, so that the flow is evenly distributed. The absorber cooling water pipe is embedded in the copper and connected with a U-shaped pipe to form a cooling loop. The electron beam strikes the graphite to generate heat, the heat is transferred to the copper, and the cooling water in the cooling water pipe embedded in the copper carries away the heat. The shielding body assembly is arranged around the vacuum tube assembly to prevent radiation leakage. The cooling device realizes effective heat dissipation of 8 GeV high-power rays, has excellent radiation resistance and a very high fatigue life.

The present application relates to a kind of anti-radiation dipole magnets for particle accelerator, comprising: iron core, using H-shaped structure;Coil, set in the iron core, and coil is raised at the both ends of iron core and forms saddle-shaped structure;Anti-radiation water pipe assembly is set in the outside of one end of iron core, and the outlet end of anti-radiation water pipe assembly is connected with the outgoing head of coil, to provide cooling water in coil, the inlet end of anti-radiation water pipe assembly is connected with external cooling device.The magnet of the present application makes up for the shortcomings of prior art, improves the operating stability of magnet in strong radiation environment and its service life, and simple structure, compact.

This invention discloses a transverse feedback excitation device with high shunt impedance and horizontal light extraction, belonging to the field of particle accelerator technology. The device includes a beam position detector (BPM), an RF front-end, an ADC module, a digital signal processing module, a DAC module, a power divider, a power amplifier, a low-pass filter, an exciter (Kicker), and matching loads. The exciter (Kicker) has four parallel electrode strips located on both sides of the beam centerline, with two strips on the same side connected in parallel. Each electrode has a characteristic impedance of 100Ω, resulting in an equivalent total characteristic impedance of 50Ω after parallel connection. The four electrode strips are symmetrically distributed at the four corners within the vacuum chamber cross-section, avoiding the horizontal midplane to form an open optical path. This invention improves the shunt impedance of the exciter, reduces the RF power requirement, achieves impedance matching with a standard 50Ω system, and ensures unobstructed horizontal extraction of synchrotron radiation light.

This invention relates to the field of particle accelerator control technology, and discloses a method and system for predicting low-level control parameters of a particle accelerator, comprising: Step 1, acquiring low-level control-related data and encapsulating it into a parameter tuning cycle-level input sample set; Step 2, determining the influence of control actions, thermal drift hysteresis, and channel mismatch conduction; Step 3, generating a state differentiation vector, state constraint labels, and an input sequence with state labels; Step 4, performing three-branch bidirectional long short-term memory network encoding fusion to obtain a comprehensive memory feature; Step 5, obtaining a parameter tuning context representation based on the comprehensive memory feature and state constraint labels through attention weighting; Step 6, obtaining the establishment power and predicted values ​​of incident and reflected power of multiple channels; Step 7, combining the target establishment power to back-calculate the control setpoint for the next parameter tuning cycle. This invention realizes the prediction and determination of the low-level control setpoint of the particle accelerator in the next parameter tuning cycle.

The utility model discloses a modularized particle accelerator coil / magnet power supply case, which comprises a case main body, and a first back plate and a second back plate which are arranged in the case main body, and the first back plate and the second back plate are arranged face to face to divide an inner cavity of the case into a first compartment, a second compartment and a third compartment in sequence; the first compartment is used for placing a board card type control module, the third compartment is used for placing a board card type function module, and the second compartment is a wiring operation space for mutual connection of the modules; a plurality of quick-plug type connecting terminals are arranged on the plate face, facing the second compartment, of the second back plate, the quick-plug type connecting terminals are used for independently connecting all the function modules to the second back plate, and the quick-plug type connecting terminals are connected with one another through copper bars. According to the utility model, the power supply case is upgraded and reformed, so that the situation that the interior of the power supply case is disordered due to the use of a traditional wire is avoided, a reasonable ventilation channel can be planned in the case, and the heat dissipation effect is improved.

This disclosure provides an assembly apparatus for an arc-shaped superconducting magnet, relating to the field of particle accelerator assembly. The assembly apparatus includes: a drive module for providing power to drive the arc-shaped superconducting magnet along a predetermined trajectory into a cryostat; a support module connected to the drive module for supporting the arc-shaped superconducting magnet; a sensing module disposed on the surface of the superconducting magnet for detecting operating parameters during the movement of the arc-shaped magnet; and a control module communicatively connected to the drive module and the sensing module for controlling the operating state of the drive module based on the operating parameters fed back by the sensing module. This method, through the coordinated operation of the drive module, sensing module, and control module, transforms the assembly process of the arc-shaped superconducting magnet from an invisible, feedback-free, and purely experience-based manual operation into an intelligent operation mode with full-process visual detection, significantly improving the assembly safety and positioning accuracy of large-scale cryogenic superconducting equipment.

The application discloses a kind of high-precision hyperboloid four-pole integrated precision machining methods, specifically comprising the following operating steps: part blank preparation: four metal rod blanks are prepared after rough machining and reserved grinding allowance, while preparing the insulating support with high-precision datum surface and the connecting area is treated by metallization;Integral brazing assembly: four metal rod blanks and insulating support are accurately positioned by high-precision brazing tooling, brazing is completed under vacuum or protective atmosphere, and an integral structure blank is formed;Integrated inner hole precision grinding.The high-precision hyperboloid four-pole integrated precision machining method of the application fundamentally eliminates assembly error, improves the four-pole inner field precision and structural stability, simplifies the process and reduces the cost, the product consistency and repeatability are excellent, suitable for mass spectrometer, ion trap, particle accelerator and other scientific instruments hyperboloid four-pole manufacturing.

The application discloses a device for measuring orbital angular momentum of vortex particles based on a gradient magnetic field, which is integrated in a beamline system of a particle accelerator or an electron microscope and used for measuring the orbital angular momentum of a vortex particle beam in real time. The device comprises a vortex particle source, a gradient magnetic field device, a detection system and a processing system. The vortex particle source is used for providing a vortex particle beam. The gradient magnetic field device is used for exerting a transverse deflection force related to the orbital angular momentum on the vortex particle beam. The detection system is used for receiving the particle beam after a certain longitudinal movement and obtaining an intensity distribution image of the particle beam. The processing system is used for calculating the orbital angular momentum of the vortex particle beam according to the intensity distribution image and magnetic field gradient parameters. The device for measuring the orbital angular momentum of vortex particles based on the gradient magnetic field has the characteristics of simple structure, fast response and integration in the beamline system, and is suitable for various equipment environments such as particle accelerators, electron microscopes and the like.