874results about "Accelerators" patented technology

The invention discloses a linear beam homogenization transmission line debugging method based on a four-and-eight-pole composite magnet, and the method comprises the steps: adjusting the current of four-pole iron, and enabling the X-direction beam near the four-and-eight-pole composite magnet 1 to form a waist; the current of the quadrupole iron of the quadrupole-octupole composite iron 1 is adjusted, so that the Y-direction beam near the quadrupole-octupole composite iron 2 forms a waist; when the octupole field current of the fourth-and-eighth-level composite iron 1 is adjusted, the current of the intersection point is obtained for the second time; when the octupole field current of the fourth-and-eight-level composite iron 2 is adjusted, a method of combining intersection point current and quadrupole iron current increase is adopted. According to the invention, through a method of forming a waist in an X-direction beam near the four-eight-pole composite iron 1, forming a waist in a Y-direction beam near the four-eight-pole composite iron 2, and combining dynamic intersection points and adjustment of current of the four-pole iron, the problem that a transmission line based on discrete components of the four-pole iron and the eight-pole iron in the prior art is poor in transmission efficiency is solved. And the beam homogenization debugging of octopole iron is difficult to homogenize the Gaussian distribution beam.

The invention relates to the technical field of particle accelerators, in particular to a transverse feedback system with a switchable excitation direction and a control method thereof, and the system comprises a beam position detector BPM which is used for measuring a beam signal; the RF front end is used for receiving the beam signal sent by the beam position detector BPM and carrying out amplification and filtering processing; the ADC module is used for converting the beam signal into a digital signal; the digital signal processing module is used for carrying out digital signal processing calculation to obtain an excitation signal; the DAC module is used for carrying out digital-to-analog conversion; the power divider is used for adjusting the phase of the excitation signal; the exciter comprises four Kickers with electrodes, a power amplifier, a low-pass filter and a matched load and is used for applying a transverse excitation signal to the beam current, and the problems that in the prior art, a transverse feedback system Kicker occupies a large longitudinal space, the system is complex, and precision and efficiency are low are solved.

The invention discloses a point light source electron accelerator which comprises a sealing box body, a cathode, a laser emitter, a reflecting cover, a grid plate and a mounting plate, the mounting plate is erected in the sealing box body, a mounting hole is formed in the mounting plate, the cathode is mounted in the mounting hole, and the laser emitter is arranged in the sealing box body. The reflecting cover is arranged at the top of the mounting hole; the reflecting cover is a semi-spherical surface, a laser through hole is formed in the top of the semi-spherical surface, and the laser through hole is coaxial with the cathode; the transmitting end of the laser transmitter is aligned with the cathode; the grid plate is mounted below the mounting plate and is aligned with the mounting holes; and an electron outlet is formed below the grid plate. The invention provides a point light source electron accelerator, and the point light source electron accelerator provides a light and miniaturized electron accelerator design, so that the application field of the accelerator is wider.

The invention discloses an exciting current adjusting method for four-pole / eight-pole composite iron. The exciting current adjusting method comprises the following steps: establishing a two-dimensional data comparison table of coil currents of four-pole iron and eight-pole iron; performing experimental measurement to obtain a quadrupole field magnetic field gradient three-dimensional curved surface sample database and an octupole field magnetic field gradient three-dimensional curved surface sample database; performing two-dimensional interpolation on the magnetic field gradient three-dimensional curved surface sample database by using a cubic spline function; a quadrupole field magnetic field gradient plane and an octupole field magnetic field gradient plane are selected and intersect with the quadrupole field magnetic field gradient three-dimensional curved surface sample database curved surface and the octupole field magnetic field gradient three-dimensional curved surface sample database curved surface respectively, and current curves meeting the quadrupole field gradient and the octupole field gradient are obtained; and obtaining an intersection point of the two curves, and using the intersection point as a solution of the compound iron exciting current. According to the invention, based on magnetic field measurement data under a few groups of excitation currents, a large amount of excitation current debugging time is saved, and accurate adjustment of the magnetic field gradient of the composite multi-pole magnet can be realized.

The invention relates to the technical field of medical RFQ accelerators, and particularly discloses a medical RFQ accelerator multi-safety redundancy linkage protection system and method, and the method comprises the steps: collecting the working state image data of an accelerator, and generating a three-dimensional fusion feature map containing heat distribution, electromagnetic radiation intensity and mechanical vibration; a multi-dimensional safety index evaluation vector is output by using a multi-mode Transform model; constructing a dynamic safety boundary prediction model, and generating a real-time safety threshold curve of each subsystem according to the evaluation vector; performing parameter optimization by adopting a federated learning framework; constructing a non-tampering security event traceability chain by using a block chain; constructing a multi-stage protection strategy of the medical RFQ accelerator; and verifying the redundancy control channel through a cross-layer security verification mechanism, and finally executing a protection action. According to the invention, multiple safety redundancy protection of the medical RFQ accelerator is realized, the risk of false shutdown is reduced, and the requirement of high reliability of clinical radiotherapy is met.

The invention relates to an online three-dimensional adjusting device and method for a dipolar magnet vacuum chamber of a rotating rack, and the device comprises a pipeline clamping mechanism which is used for clamping the vacuum chamber; the driving and adjusting assembly comprises an X-axis transverse adjusting unit, a Y-axis longitudinal adjusting unit and a Z-axis vertical adjusting unit, the X-axis transverse adjusting unit is vertically arranged on a moving part of the Y-axis longitudinal adjusting unit, and the Z-axis vertical adjusting unit is connected with the moving part of the X-axis transverse adjusting unit; the pipeline clamping mechanism is connected with the Z-axis vertical adjusting unit; and the controller is in communication connection with the driving and adjusting assembly and is used for acquiring position information of the vacuum chamber and analyzing position errors so as to control the driving and adjusting assembly, so that the three-dimensional space position of the vacuum chamber is adjusted. The device solves the problem that the interior of a vacuum chamber cannot be adjusted when a dipolar magnet is installed in an abnormal posture at present.

The invention belongs to the technical field of particle accelerators, and discloses a nonlinear impact magnet based on a nanocrystalline magnetic material and a matched power supply system. The nonlinear impact magnet comprises a magnetic core and a magnet exciting coil assembly, the magnetic core comprises magnetic poles and a magnetic yoke; the magnetic pole and the magnet yoke are both of a fully-symmetrical annular structure, and the magnet yoke is arranged on the periphery of the magnetic pole. The magnetic pole comprises N same magnetic pole units, N is 4, 6 or 8, and the magnetic pole is made by laminating nanocrystalline strips; and the excitation coil assembly is wound outside each magnetic pole unit. Compared with a traditional silicon steel sheet or ferrite magnetic core, the magnet provided by the invention can improve the uniformity of a magnetic field, and the magnetic pole made of the nanocrystalline strip with ultrahigh magnetic conductivity and low coercive force has stronger magnetic field uniformity and low disturbance characteristic; and the design requirement of the STCF clash ring off-axis injection system for low disturbance of the circulating beam bunch can be better met.

Disclosed in the present invention are a scanning box device and an electron accelerator, the electron accelerator comprising an accelerating tube and a deflection coil; the scanning box device comprising a scanning chamber and a scanning box, wherein the scanning chamber is sealingly connected to the scanning box; the scanning chamber is arranged above the scanning box; the accelerating tube is arranged above the scanning chamber; the deflection coil is arranged on the outer side of the scanning chamber; and the scanning chamber is made of a non-metallic material. The present invention can prevent the generation of eddy currents in the scanning box, thus reducing the problems of energy loss and heat generation, improving the performance and stability of the apparatus.

The invention relates to a beam feedback system based on radio frequency direct acquisition, which comprises a beam position detector, a sum and difference device, a front-end processing module, a feedback processor and an amplification excitation module which are connected in sequence, the sum-difference device is used for determining a horizontal position signal, a vertical position signal and a longitudinal position signal of the beam bunch according to the position signal of the beam bunch, the front-end processing module is used for pre-processing the position signals of the beam bunch, and the feedback processor is used for sampling the pre-processed position signals of the beam bunch; the feedback module is used for receiving a beam bunch and generating a horizontal feedback signal, a vertical feedback signal and a longitudinal feedback signal of the beam bunch, and the amplification excitation module is used for amplifying the feedback signals of the beam bunch and acting the amplified feedback signals of the beam bunch on the beam bunch, so that the instability of the beam is inhibited.

A system for mitigating backsputter to a thruster in a propulsion test facility includes a plate disposed in an output plume of the thruster and a magnetic field generator disposed about or at the plate and configured to generate a magnetic field between the thruster and the plate. The magnetic field generator is oriented such that a magnetic field is generated transverse to the output plume.

The invention provides a medical accelerator beam excitation device and a control method thereof, and belongs to the technical field of medical accelerators, and the medical accelerator beam excitation device comprises an integrated exciter which comprises a horizontally arranged first electrode pair and a vertically arranged second electrode pair; the excitation signal source is used for generating a working point excitation signal or a slow extraction excitation signal; the excitation signal source outputs a working point excitation signal or slowly leads out the excitation signal to the power amplification and routing module, and the power amplification and routing module is used for performing power amplification on the received excitation signal and routing the amplified excitation signal to the first electrode pair or the second electrode pair; and the first electrode pair and the second electrode pair are used for applying an excitation effect on the beam current according to the amplified excitation signal. According to the application, the excitation electrode and the power amplification link can be multiplexed, and two functions of working point excitation and slow extraction excitation can be simultaneously realized on one set of device, so that the space of the accelerator is effectively saved.

The invention discloses a compact accelerator extremely-high vacuum system and an implementation method thereof. The compact accelerator extremely-high vacuum system comprises a dipole iron vacuum chamber, a BUMP iron vacuum chamber, a BPM cavity, a vacuum pump chamber and a quadrupole iron vacuum chamber which are sequentially connected to form a beam main line. A plurality of non-evaporable getter sheets are arranged in the dipole iron vacuum chamber and the quadrupole iron vacuum chamber in an array manner and are used for extracting active gas in a beam main line to obtain extremely high vacuum; a vacuum measuring gauge tube, a sputtering ion pump, a molecular pump and a gate valve are installed on the vacuum pump chamber, the vacuum measuring gauge tube is used for measuring the vacuum degree in the beam main line, the sputtering ion pump is used for extracting argon and methane in the beam main line and conducting baking, and the molecular pump is used for rough extraction of the beam main line and exhaust in the baking process; the gate valve is used for separating the molecular pump from the beam main line. According to the invention, hydrogen, carbon monoxide and other active gases in the system can be extracted under the condition that a titanium sublimation pump cannot be installed due to insufficient space, so that extremely high vacuum can be obtained.

Provided is a superconducting cryo module that can be made more compact. A superconducting cryo module according to the present disclosure comprises: a superconducting accelerating cavity that has a cell part accelerating electrons, a beam pipe part extending from the cell part to an electron incidence side, and an extraction part of the electrons which were accelerated by the cell part; and an electron gun that is located in the interior of the beam pipe part of the superconducting accelerating cavity, is located on the same axis as a beam axis BA of the superconducting accelerating cavity, and emits electrons into the cell part.

The invention provides a compact synchrotron vacuum system and a design method, and relates to the technical field of particle acceleration. The vacuum system comprises a first vacuum unit and a second vacuum unit, the first vacuum unit comprises at least two first beam deflection vacuum tubes, and the adjacent first beam deflection vacuum tubes are connected through a first beam regulation and control vacuum tube; the second vacuum unit comprises at least two second beam deflection vacuum tubes, and the adjacent second beam deflection vacuum tubes are connected through a second beam regulation and control vacuum tube; a second beam deflection vacuum tube at one end of the second vacuum unit is connected with a first beam regulation vacuum tube at the first end of the first vacuum unit, and a second beam deflection vacuum tube at the other end of the second vacuum unit is connected with a first beam regulation vacuum tube at the second end of the first vacuum unit; and a beam diagnosis element is arranged in the first beam regulation and control vacuum tube of the first vacuum unit, so that the perimeter of the vacuum system can be shortened, and the popularization difficulty of the medical accelerator treatment device in small and medium-sized medical institutions is reduced.

The invention discloses a particle accelerator system loop parameter on-line intelligent regulation and control method and device based on a large language model, and the method comprises the steps: obtaining the cavity operation data of a radio frequency cavity in real time, calculating the system state parameter of the current cavity, judging whether the system state parameter meets an adjustment and optimization termination condition or not, and continuing if the adjustment and optimization termination condition is not met; converting the system state parameter and the PI parameter tuning target into a structured system state description described by a natural language, and generating a task execution cue word; analyzing a system state by using a large language model based on the task execution cue word, and reasoning a PI parameter value; analyzing the output of the large language model, accurately extracting PI parameter values, and performing rationality check on the accurately extracted PI parameter values; and performing application execution on the extracted PI parameter value, and repeating the tuning process until tuning is completed. Therefore, an effective solution is provided for automatic PI parameter tuning, and the time cost and professional skill requirements of manual debugging are remarkably reduced while the quality of tuning is ensured.

The utility model discloses a beam scraping device structure for a beam line of an ion implanter, which relates to the technical field of high-energy physical experiments and accelerators and comprises a beam scraping device, the beam scraping device is integrally machined and formed, and the beam scraping device is of a structure with a square rod in the middle and disc flanges at two ends. Beam channels are formed in the middles of the two ends of the beam scraping device. The cross section of the beam channel is square and is adjusted according to the shape of the beam. A plurality of round holes are formed in the disc flange-shaped surfaces at the two ends of the beam scraping device, and the two ends of the beam scraping device are connected with the beam line main pipeline through the plurality of round holes. Two U-shaped tubular water cooling flow channels are formed in the middle of a square rod in the middle of the beam scraping device, and an inlet and an outlet are formed in the positions, on the surface of the beam scraping device, of the two ends of each water cooling flow channel respectively. The utility model relates to a beam scraping device with a long beam pipeline. The utility model relates to a beam scraping device with a water cooling structure. According to the beam scraping device, an integral processing mode is adopted, and a beam channel is processed in a wire cutting mode.

A device for measuring a quantity representative of a population (N) of cold atoms, the cold atoms being located in a cloud of cold atoms to be analyzed, the device includes a microwave source configured to generate an incident signal at a predetermined signal frequency, a microwave guide configured to propagate the incident signal and an antenna configured to emit the incident signal to the cloud of cold atoms and its environment, the antenna and the microwave guide also being able to recover an atomic reflected signal resulting from a reflection of the incident signal by the cloud and its environment, and which propagates in the waveguide in the opposite direction to the incident signal, a splitting device coupled to the microwave guide and configured to extract at least part of the atomic reflected signal, a detector configured to detect the atomic reflected signal extracted by the splitting device, the quantity representative of the population of cold atoms (N) being obtained from a detected value of the atomic reflected signal and from a detected value of a signal reflected by the environment in the absence of the cloud, called reference reflected signal.

A Flash beam dose control method and a related device. The Flash beam dose control method comprises: obtaining a Flash beam output dose demand; controlling, by means of a Flash tuning mode, the number of pulse periods of output beam charges within a preset time; and / or controlling the pulse width of an ion source voltage by means of a pulse width mapping curve, so as to control a Flash beam output dose rate. By precisely controlling the number of pulse periods of output beam charges and the pulse width of the ion source voltage, the Flash beam output dose rate can be precisely controlled without requiring an additional shielding function for a proton therapy room, so that the dose of Flash can also be tuned in a conventional proton therapy room, thereby facilitating implementation of particle Flash radiotherapy.

The invention relates to the field of particle accelerators, and provides a wire drawing device and a wire drawing method for a tension wire in a cold shield of a cryostat. The wire drawing device for the tension wire in the cold screen of the cryostat comprises a first bridging pipe, a second bridging pipe and an internal guide body, and the first bridging pipe and the second bridging pipe are inserted into the cold screen from the two opposite sides of a vacuum chamber of the cryostat respectively and connected with a tension wire instrument corresponding to the interior of the cold screen in a sleeved mode; the end, close to the second bridging pipe, of the first bridging pipe is provided with a first reducing section. Due to the fact that the inner diameter of the first reducing section is gradually increased in the direction close to the second bridging pipe, the end, close to the first bridging pipe, of the second bridging pipe can be easily inserted into the first reducing section, and the interior of the first bridging pipe and the interior of the second bridging pipe are communicated to form a wire guiding channel. Therefore, under the condition that the cover plate does not need to be opened, stable and lasting stretching of the linear reference can be rapidly achieved with high precision, the accuracy of deformation monitoring of the cryostat is ensured, and the experiment efficiency is improved.

A system is described that includes a sputter target and a magnetic element array including multiple sets of magnets arranged to have a Hall-Effect region that extends along a length of the sputter target. The elongated sputtering electrode material tube is interposed between the magnetic array and an object to be deposited with a sputtered material from the sputter target. During a direct current high-power impulse magnetron sputtering operation, the system performs a depositing on a surface of the object by generating and controlling an ion and neutral particle flux by: providing a vacuum apparatus containing a sputter target holder electrode; first generating a high-power pulsed plasma magnetron discharge with a high-current negative direct current (DC) pulse to the sputter a target holder electrode; and second generating a configurable positive voltage kick pulse to the sputter target holder electrode after terminating the negative DC pulse.

The invention provides a button type signal feed-through for a beam position detector. The button type signal feed-through comprises a shell, a composite unit and an insulator. The composite unit comprises a button electrode and an inner conductor, and the button electrode is suitable for sensing an electromagnetic field signal generated by charged particle beams in the vacuum cavity; the inner conductor vertically and integrally extends from the center of the button electrode, a flange is arranged near one end, close to the button electrode, of the inner conductor, and the inner conductor is suitable for transmitting beam electromagnetic field signals. The insulator is sleeved on the inner conductor and comprises a first section cylinder and a second section cylinder, and the front end face of the first section cylinder is welded and fixed with the flange of the inner conductor; the second section of cylinder body extends outwards in the radial direction from the rear end of the first section of cylinder body, the circumferential outer surface of the second section of cylinder body is welded and fixed with the shell, and the insulator is suitable for fixed support and electrical insulation, so that smooth transition of transmission impedance and vacuum sealing are realized. The invention further provides a preparation method of the charged particle beam position detector and a charged particle beam position detector structure.

A neutron capture therapy system. The neutron capture therapy system includes: a charged particle generation device used for generating charged particles; an accelerator used for accelerating the charged particles; a neutron generation device including a particle transmission part and a neutron generation part provided in a first end part of the particle transmission part, wherein the charged particles can pass through the particle transmission part and interact with the neutron generation part to generate neutrons; a beam shaping body having an accommodating cavity, wherein the accommodating cavity includes a first surface and a second surface intersecting with the first surface, and the first end part is provided in the accommodating cavity; and a first fitting part provided between the first surface of the accommodating cavity and the outer surface of the particle transmission part. The first fitting part is configured to at least surround part of the particle transmission part.

The invention relates to the technical field of vacuum cavity machining, in particular to a thin-wall vacuum chamber machining method and an arc-shaped forked thin-wall vacuum chamber. The thin-wall vacuum chamber machining method comprises the steps that a thin-wall pipe is machined; the thin-walled pipe is fixed to the mold; the thin-walled tube is subjected to empty burning treatment and then put into a vacuum brazing furnace to be subjected to vacuum brazing; and the thin-walled pipe and the ultrahigh vacuum flange are installed and welded. The arc-shaped forked thin-wall vacuum chamber comprises a vacuum chamber main body, the vacuum chamber main body comprises a first vacuum chamber forming a part of the vacuum chamber main body in the length direction, and the head end of the first vacuum chamber serves as one end of the vacuum chamber main body and is provided with one ultrahigh vacuum flange; the second vacuum chamber and the third vacuum chamber are respectively connected to the tail end of the first vacuum chamber, the second vacuum chamber and the third vacuum chamber jointly form the rest part of the vacuum chamber main body in the length direction, and the tail end of the second vacuum chamber and the tail end of the third vacuum chamber are jointly provided with another ultrahigh vacuum flange.

The invention relates to the technical field of particle acceleration, in particular to a dipolar magnet, a combined magnet and a particle accelerator. The two-pole magnet comprises a first saddle-shaped winding and a second saddle-shaped winding which are oppositely arranged along the direction of a central ion beam current to form a main magnetic field structure; the pole head areas of the first saddle-shaped winding and the second saddle-shaped winding respectively extend towards the outer side far away from the central ion beam current direction to form an arch-shaped cavity penetrating through the two ends of the dipolar magnet; the runway-shaped coil comprises a first runway-shaped winding and a second runway-shaped winding, the first runway-shaped winding and the second runway-shaped winding are located in the arch-shaped cavity and correspond to the first saddle-shaped winding and the second saddle-shaped winding respectively, and the pole head area of the first runway-shaped winding and the pole head area of the second runway-shaped winding are adjacent to the pole head area of the saddle-shaped coil. While the contribution of the pole head position to the magnetic field of the good field area of the coil is ensured, the wire turn number density of the deflection section is obviously improved, thereby enhancing the magnetic field intensity.

The invention relates to the technical field of cooling of particle accelerators and nuclear power equipment, 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 shield assembly and a support assembly. The absorber assembly is formed by welding internal graphite and external copper through a brazing process, and air holes penetrating to a graphite layer are formed in the copper and communicated with an air cavity in the graphite to form a vacuum sealing cavity. The cooling water system assembly comprises a water segregator with two layers of water inlet ring cavities and two layers of water outlet ring cavities, and uniform flow distribution is ensured. And the absorber cooling water pipe is embedded into the copper and is connected with the U-shaped pipe to form a cooling loop. The electron beam bombards the graphite to generate heat, and the heat is transferred to the copper and taken away by cooling water in the cooling water pipe embedded in the copper. The shield assembly is arranged around the vacuum tube assembly to prevent radiation leakage. The cooling device realizes effective heat dissipation of 8GeV high-power rays, and has excellent radiation resistance and extremely long fatigue life.

The invention relates to the technical field of particle therapy, and provides a vacuum membrane window structure and a processing method.The structure comprises a membrane window flange, a supporting lining net, a non-metal polymer film, a membrane window pressing plate, a first sealing piece and a second sealing piece; the membrane window flange is provided with an annular positioning part; the supporting lining net is arranged on the annular positioning part; the non-metal polymer film is arranged on the side, away from the annular positioning part, of the supporting lining net and plated with a metal layer. The film window pressing plate is arranged on the side, away from the supporting lining net, of the non-metal polymer film. The first sealing piece is arranged between the periphery of the supporting lining net and the non-metal polymer film, and the second sealing piece is arranged between the periphery of the annular positioning part and the periphery of the non-metal polymer film; the non-metal polymer film, the film plating layer and the supporting lining net are tightly attached together, so that the film thickness is greatly reduced, the vacuum performance of a single-layer film is better than that of an existing double-layer structure, energy loss, scattering and neutron yield during beam film penetrating are reduced, and beam quality and treatment precision are improved.

An energy converter is configured to convert photons into an output electrical signal, wherein the energy converter includes a laser arrangement configured to generate a beam of photons and a waveguide arrangement fabricated onto a substrate. The waveguide arrangement includes a plurality of waveguides configured to exhibit a non-linear optical effect, in which the plurality of waveguides are configured to receive the beam of photons and to bifurcate the beam into electron-rich photons propagating along one of the plurality of waveguides and into positron-rich photons propagating along another of the plurality of waveguides. An electrode arrangement having one or more electrodes are configured to apply an electric field to the electron-rich photons and the positron-rich photons to extract the output electrical signal therefrom. The energy converter may be, for example, included as a component part of a positron source for generating a beam of positrons.

The invention provides a single / double-module energy-adjustable superconducting electron accelerator device, a medical isotope production system and a medical isotope production method, and the device comprises an injection system which is used for generating an electron beam current with certain energy and current intensity; the acceleration module system comprises single or double parallel acceleration modules, and each acceleration module comprises a superconducting cavity and a low-temperature unit; the low-temperature unit comprises a refrigerator, a high-thermal-conductivity cold chain, and a cold shield and a vacuum shell which sequentially cover the periphery; the radio frequency system is used for feeding microwave power into the superconducting cavity, maintaining the amplitude and phase stability of an electromagnetic field and accurately compensating the frequency deviation of the superconducting cavity; and the electron motion trail control system is used for guiding the electron beam to pass through the acceleration module and the plurality of circulating transmission pipelines with the corner radiuses sequentially enlarged for multiple times. The technical problems that an existing accelerator is limited by serious heating and cannot achieve high-flow-intensity and high-energy operation, a low-temperature cooling system is complex, so that the operation and maintenance cost is high, high energy and high flow intensity cannot be considered at the same time, and medical isotope production is difficult to meet are solved.

The invention provides an adaptive control method and system for an accelerator klystron, and electronic equipment, and the method comprises the steps: collecting a reverse wave signal in a microwave signal which is generated by an excitation source, is amplified by the klystron, and is inputted to an accelerating tube, and obtaining the current output frequency of the excitation source; performing I / Q orthogonal demodulation on the reverse wave signal to obtain an I / Q signal, and calculating the frequency deviation between the current resonant frequency of the accelerating tube and the current output frequency of the excitation source; and according to the frequency deviation, outputting a frequency control instruction to the excitation source so as to adjust the output frequency of the excitation source, and enabling the current output frequency of the excitation source to track the current resonant frequency of the accelerating tube. By calculating the frequency deviation and directly outputting the control instruction to adjust the output frequency of the excitation source, the technical problems of control object dislocation and response lag existing in a traditional automatic frequency control system are solved.

The invention relates to the field of particle accelerators, in particular to an ultrahigh and extremely high vacuum acquisition system and method. The vacuum obtaining system comprises a vacuum obtaining device and a vacuum temperature control device, the vacuum obtaining device comprises a ceramic vacuum chamber, an interlayer vacuum chamber, a main pump chamber, a first vacuum pumping assembly and a second vacuum pumping assembly, the main vacuum chamber is formed in the ceramic vacuum chamber, and the ceramic vacuum chamber is arranged in the interlayer vacuum chamber; and an interlayer space is formed between the ceramic vacuum chamber and the interlayer vacuum chamber. The ceramic vacuum chamber is arranged in the interlayer vacuum chamber, the interlayer space is formed between the ceramic vacuum chamber and the interlayer vacuum chamber, and the interlayer vacuum chamber is heated through the heating element, so that the ceramic vacuum chamber is uniformly heated in a non-contact heat radiation uniform heating mode; the problem of thermal stress concentration caused by direct conduction heating of the ceramic vacuum chamber is thoroughly eliminated, leakage or fracture of the ceramic-metal joint caused by thermal stress is avoided, and the structural integrity of a heterogeneous material connecting area is ensured.