48 results about "Rf cavity" patented technology

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 invention discloses a radio frequency superconducting material performance testing system and a surface resistance measuring method.The radio frequency superconducting material performance testing system comprises a radio frequency cavity module, a low temperature module and a measuring module, the radio frequency cavity module comprises a mushroom-shaped superconducting cavity, the inner wall of the superconducting cavity is plated with a Ni3tin film, and the inner wall of the superconducting cavity is plated with a Ni3tin film; the low-temperature module is provided with a multi-stage cooling structure and a magnetic shielding shell. The measuring module is used for collecting the sample temperature, the magnetic field, the vacuum degree, the radio frequency power and the direct-current power of the heater. According to the radio frequency superconducting material performance testing system, by optimizing the design of the mushroom-shaped cavity and adopting the Nb3Sn coating technology and the efficient conduction cooling low-temperature module, the dependence of a traditional radio frequency material testing system on a liquid helium low-temperature system is eliminated, a compact testing platform is formed, and high-field and high-resolution measurement of the surface resistance of an SRF material is achieved.

The application relates to the field of relays and discloses an RF relay with a bifurcated structure, which comprises an RF cavity, a static contact mechanism is arranged in the RF cavity, a dynamic contact mechanism and a power mechanism are arranged above the static contact mechanism, the static contact mechanism comprises a main static contact piece, a plurality of slave static contact pieces are arranged around the periphery of the main static contact piece; the dynamic contact mechanism comprises a main dynamic contact piece, the main dynamic contact piece is located above the main static contact piece, the main dynamic contact piece extends outward with the main dynamic contact piece as the center, and a plurality of contact arms are formed; the ends of the contact arms, which are away from the main dynamic contact piece, extend outward to form two slave dynamic contact pieces, each slave dynamic contact piece is arranged in one-to-one correspondence with each slave static contact piece to expand the number of channels of the relay, and each slave dynamic contact piece is in contact connection with the corresponding slave static contact piece to turn on the corresponding RF channel. The scheme realizes the multiplication of the number of branches of the RF relay without reducing the working frequency of the relay.

The utility model discloses a pair of radio frequency endoscope electrode tissue scissors, which comprises two connecting parts and blades arranged at the tail ends of the two connecting parts, the two blades are rotationally arranged through a scissors shaft, a mounting opening is formed in the upper surface of each blade and located at the position of a cutting edge in a penetrating manner, and extension openings are formed in the two ends of the inner surface of each mounting opening. The movable shearing mechanism comprises a movable shearing knife located between the two extending openings, a round corner is formed in the side, away from the inclined face, of the outer surface of the movable shearing knife, and an adapter shaft is fixedly arranged in the movable shearing knife and located at the circle center position of the round corner. And a supporting and positioning mechanism. The rotatable movable shearing mechanisms are arranged at the cutting edges of the blades, the cutting edges of the two movable shearing knives can be in close fit with the lower surfaces in the mode that the magnetic sheets attract one another, and therefore during frequent shearing of the two movable shearing knives, the cutting edges of the two movable shearing knives are not prone to generating a gap due to loosening of the shearing shaft part, and the shearing efficiency is improved. And the friction force at the joint is increased.

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

The utility model relates to the technical field of medical cutting instruments, and discloses a radio frequency endoscope electrode blood coagulation cutter which comprises a blood coagulation cutter body and an electrode blood coagulation cutting head movably installed on one side of the blood coagulation cutter body, and an installation groove is formed in one side of the blood coagulation cutter body. A mounting rod located in the mounting groove is fixedly mounted on the other side of the electrode blood coagulation cutting head, first sliding grooves are formed in the top and the bottom of the inner wall of the mounting groove, and sliding strips fixed to the mounting rod are slidably mounted in the first sliding grooves. According to the electrode blood coagulation cutting head, by replacing the electrode blood coagulation cutting head with a proper size, after the sliding strips pass through the interior of the second sliding groove, an opening between the sliding strips is located on the inner side of the limiting rotating ring, the second sliding groove is in a horizontal state by rotating the limiting rotating ring, and therefore the inner wall of the limiting rotating ring is located at the opening between the sliding strips for limiting; at the moment, the electrode blood coagulation cutting head with the appropriate size is fixed to one side of the blood coagulation cutter body, and operation cutting hemostasis is facilitated.

To provide a method for mixed signal synchronization for a charged particle column.SOLUTION: A method for mixed signal synchronization for a charged particle column includes: generating an optical pulse signal from a light source that emits optical beam pulses toward a sample in the charged particle column; generating a radio frequency (RF) signal associated with an RF cavity that pulses the charged particle beam toward the sample; generating a composite signal using at least the RF signal and the optical pulse signal; and controlling, based at least in part on the composite signal, at least one of i) the light source or ii) the RF signal for the RF cavity such that the optical beam pulses and the charged particle beam pulses are synchronized at the sample.SELECTED DRAWING: Figure 9

The utility model provides an electrical integration box for a process cavity, which comprises a box main body and a sealing cover for sealing the box main body, and the internal space of the box main body is divided into a main cavity, a radio frequency cavity and a filter cavity; the radio frequency cavity is arranged at the upper part of one side of the box main body, the filter cavity is arranged at the upper part of the other side opposite to the radio frequency cavity, the radio frequency cavity is used for accommodating a radio frequency input plugging terminal, and the radio frequency input plugging terminal is arranged on the sealing cover corresponding to the radio frequency cavity; a filter is arranged in the filter chamber, a back pressure gas pipeline and a condensation plate assembly are arranged in the main chamber, the back pressure gas pipeline is arranged on a back plate of the box main body, and the condensation plate assembly is arranged below the radio frequency chamber; a first radio frequency shielding gasket is arranged on the inner side of the sealing cover. By adopting the electrical integration box for the process cavity, the reasonable separation of the space in the box main body and the reasonable deployment of components are realized, the electromagnetic interference is reduced, and the space utilization rate is improved.

The utility model relates to the technical field of high-frequency power coupling transmission, and discloses a power feed-in coupling coil based on a high-frequency cavity, which comprises a bottom plate, the top of the bottom plate is provided with a radio frequency cavity, the left and right sides of the radio frequency cavity are respectively provided with a power optimization mechanism, the top of the bottom plate is fixedly connected with a plurality of fixing plates, and the fixing plates are fixedly connected with the radio frequency cavity. The top of the fixed plate is fixedly connected with a bunching mechanism, the power optimization mechanism comprises a winding coupling coil, the front side of the winding coupling coil is fixedly connected with cables, the front sides of the two cables are fixedly connected with a hardware optimization module, and the top of the bottom plate, namely the front side of the hardware optimization module, is provided with a power distribution module. And a total power module is arranged at the top of the bottom plate, namely the right side of the power distribution module. According to the utility model, the purpose of enhancing the stability and the working reliability of the device is achieved, the phase adjustment precision is improved, and the power transmission efficiency of the device is improved.

The present invention discloses a radio frequency (RF) superconducting material performance testing system and surface resistance measurement method. The RF superconducting material performance testing system comprises an RF cavity module, a cryogenic module, and a measurement module. The RF cavity module includes a mushroom-shaped superconducting cavity with a niobium-tin thin film coated on its inner wall. The cryogenic module is equipped with a multi-stage cooling structure and a magnetic shielding shell. The measurement module is used to collect sample temperature, magnetic field, vacuum level, RF power, and heater DC power. By optimizing the mushroom-shaped cavity design, utilizing Nb3Sn coating technology, and a cryogenic module with efficient conduction cooling, this RF superconducting material performance testing system eliminates the reliance of traditional RF material testing systems on liquid helium cryogenic systems, creating a compact testing platform that enables high-field and high-resolution measurement of the surface resistance of SRF materials.

A method of manufacturing a radio frequency cavity resonator, wherein said radio frequency cavity resonator comprises a tubular structure extending along a longitudinal axis, said tubular structure comprising a circumferential wall structure surrounding said longitudinal axis, one or more tubular elements and a first and a second support structure associated with each of said tubular elements, wherein said first and second support structures are provided on opposite sides of each tubular element and extend radially along a diameter of the tubular structure, wherein the method comprises producing the resonator by additive manufacturing in a manufacturing direction that is parallel to said diameter.

The present invention relates to a method for performing phase-sliding annular scanning on an intense, high-power particle beam using a radio frequency cavity, comprising: converging the intense, high-power particle beam into a beam spot size required by a target surface through a focusing element group; controlling the phase shift between the radio frequency cavity and the target surface through the focusing element group; deflecting the beam so that the beam hits the target in the required direction; selecting an appropriate radio frequency cavity frequency based on the beam micropulse frequency, the target surface size, and the beam spot size at the target surface, ensuring a frequency difference Δf between the radio frequency cavity and the bunch, so that the centers of adjacent bunches experience inconsistent transverse field phases, thereby being scanned to different positions on the target surface, thereby achieving phase-sliding scanning; and utilizing the transverse electromagnetic field of an orthogonal three-stable radio frequency cavity to perform a transverse kick on the beam, so that the center of the beam spot forms an annular distribution on the target surface. The present invention's method for performing phase-sliding annular scanning on an intense, high-power particle beam using a three-stable radio frequency cavity can meet the needs of annular scanning of an intense, high-power particle beam.

The utility model discloses a portable sensing integrated radar module, which solves the problems of large volume, high power consumption, poor heat dissipation, insufficient anti-interference capability and the like in the prior art. The module is integrally packaged in an antenna unit, a radio frequency front end unit, a signal processing unit and a power supply management unit in a metal shell; the antenna unit is arranged at the top of the metal shell, and the output end of the antenna unit is connected with the input end of the radio frequency front end unit; the output end of the radio frequency front end unit is connected with the input end of the signal processing unit; the input end of the power management unit is used for connecting an external power supply, and the output end of the power management unit supplies power to the radio frequency front-end unit and the signal processing unit; heat dissipation fins are arranged on the outer surface of the metal shell, and an integrally-formed shielding partition wall is arranged in the metal shell; wherein the shielding partition wall divides the metal shell into a radio frequency cavity for accommodating the radio frequency front-end unit and a digital cavity for placing the signal processing unit and the power management unit, and a compact design is realized.

The invention discloses a radio frequency cavity self-excitation loop control method and system used in an accelerator aging or starting process, and the method comprises the steps: measuring the delay time of an excitation signal in a self-excitation loop when a radio frequency cavity is in an offline state; determining a compensation phase according to the delay time; and performing phase compensation on the self-excitation signal in the self-excitation loop according to the determined compensation phase. According to the method and the system provided by the invention, phase compensation is carried out on the self-excitation signal in the self-excitation loop, so that the working frequency of the self-excitation signal follows the resonant frequency of the cavity, and therefore, an anti-detuning target is realized, and the stability of the signal in the radio frequency cavity is improved.

This application discloses a semiconductor process apparatus, relating to the field of semiconductor technology. The apparatus includes a process chamber, a dielectric window, a radio frequency (RF) chamber, and a gas flow introduction device. The dielectric window is located above the process chamber, and the RF chamber is also located above the process chamber, with the dielectric window facing inwards. The RF chamber has a vent. Under the action of the gas flow introduction device, external gas enters the RF chamber through the vent and flows downwards through the RF chamber towards the temperature-controlled gas flow of the dielectric window. The sidewall of the RF chamber has heat dissipation holes. With this configuration, even under high-power RF conditions, the semiconductor process apparatus can rapidly cool the dielectric window to a suitable temperature range.

This invention discloses a low-accelerating-voltage radio frequency (RF) cavity, belonging to the field of particle accelerator technology. The RF cavity includes a standing-wave resonant cavity, with its core improvement lying in the periodic arc-shaped corrugated structure on the surface of the inner conductor, and the inner conductor surface being coated with a 5-10 nm thick TiN thin film. This invention disrupts the resonance conditions for secondary electron multiplication through the periodic corrugated structure, while simultaneously utilizing the TiN thin film to reduce the secondary electron yield on the inner conductor surface. The synergistic effect of these two methods achieves highly efficient suppression of the secondary electron multiplication effect with minimal impact on the cavity's RF performance. This low-accelerating-voltage RF cavity has a simple structure and reliable operation, effectively improving the stability and reliability of cavity operation. It is particularly suitable for the focusing cavity of petal accelerators, significantly improving beam quality and reducing beam loss.

The invention relates to the technical field of particle accelerators, and provides a radio frequency cavity ignition position diagnosis method based on differential flight time. According to the method, a dual-channel differential flight time measurement framework is adopted, and fast-response arc light detectors are symmetrically installed at the two ends of a radio frequency cavity, so that light signals of a sparking event are captured in real time, and dual-channel original waveform data are recorded; performing dynamic amplitude normalization processing on the signal to eliminate the gain difference of the sensor; step response parameters are analyzed to calculate time difference, a slope-shared least square fitting model is adopted to reversely deduce a theoretical time point, the time difference is converted into a spatial distance difference in combination with the electromagnetic wave propagation speed, and finally the ignition point position is determined. The centimeter-level positioning is realized, the anti-interference capability and the positioning stability are greatly improved, the real-time online monitoring and quick response capability is realized, the hardware cost is reduced by more than 90%, seamless integration with the existing system can be realized, and the convenience and the economical efficiency of field application are improved.

The utility model discloses a radio frequency unfreezing device and a refrigerator, and belongs to the technical field of radio frequency unfreezing. The radio frequency unfreezing device comprises a shielding shell which is provided with a radio frequency cavity and an unfreezing cavity, and the shielding shell is provided with a first shielding surface and a second shielding surface which are arranged at an interval in the height direction of the shielding shell; the first polar plate and the second polar plate are arranged in the radio frequency cavity and used for radiating radio frequency energy to the unfreezing cavity, and the first polar plate and the second polar plate are both arranged between the first shielding surface and the second shielding surface; along the height direction of the shielding shell, the distance H3 between the first pole plate and the second pole plate is greater than or equal to 1 / 2 of the distance H4 between the first shielding surface and the second shielding surface. After the design is adopted, the distance between the first pole plate and the second pole plate is large, so that the effective radiation area of radio frequency energy is increased, food materials in the thawing cavity can receive the radio frequency energy more uniformly, and the thawing efficiency is improved.

The present application relates to a kind of methods for measuring the amplitude-frequency and phase-frequency response of radio frequency cavity, comprising: the digital radio frequency low level system generates sawtooth wave pulse frequency signal, and generates frequency control word;The digital radio frequency low level system generates sine data sequence and cosine data sequence according to the frequency control word, and the sine data sequence and the cosine data sequence are quadrature modulated, the output of the quadrature modulation is converted to digital-analog after output to the power source, and then the power amplifier is carried out power amplification and the directional coupler coupling after generation radio frequency signal input to the radio frequency cavity;The digital radio frequency low level system obtains the cavity pressure signal of the radio frequency cavity, and the forward voltage signal and reverse voltage signal of the directional coupler;The digital radio frequency low level system carries out real-time signal processing according to the cavity pressure signal, the forward voltage signal and the reverse voltage signal, and obtains the amplitude-frequency and phase-frequency response curve of the radio frequency cavity.

The present invention relates to the technical field of radiotherapy. Disclosed are a radio frequency signal control apparatus and method, and a related device. The apparatus comprises: a main control module, configured to execute radio frequency signal control logic; a sampling module, configured to collect, in real time, a signal of a radio frequency cavity, and incident power and reflected power on a directional coupler, and feed same back to the main control module, wherein the signal of the radio frequency cavity comprises Dee power; a phase detection module, configured to detect, in real time, a phase error between the incident power and the Dee power, and generate an oscillation driving signal upon phase matching; an amplification module, configured to amplify the oscillation driving signal; and a substrate signal generation module, configured to generate a radio frequency substrate signal on the basis of the received oscillation driving signal. Thus, closed-loop control of a radio frequency signal of a synchrocyclotron is achieved, and stable and efficient acceleration of proton beams in a synchrocyclotron system is achieved.

Described herein are embodiments of a process kit for use in a plasma processing chamber. In some embodiments, the process kit for use in the process chamber includes an annular body having an upper portion and a lower portion extending downward and radially inward from the upper portion, the annular body including an inner surface having a first segment extending downward, a second segment extending radially outward from the first segment, a third segment extending downward from the second segment, a fourth segment extending radially outward from the third segment, a fifth segment extending downward from the fourth segment, a sixth segment extending radially inward from the fifth segment, a seventh segment extending downward from the sixth segment, and an eighth segment extending radially inward from the seventh segment.

The present invention discloses a superconducting radio frequency cavity, an ellipsoidal cavity and a beam tube structure with two asymmetric ends, wherein: the ellipsoidal cavity includes a left half bowl of the ellipsoidal cavity, a middle equator and a right half bowl of the ellipsoidal cavity; the beam tube structure with two asymmetric ends includes a triangular beam tube structure and an adaptive beam tube structure; the triangular beam tube structure includes a first transition section and a triangular beam tube; the middle equator is used to adjust the frequency of the ellipsoidal cavity and facilitate welding; the adaptive beam tube structure is connected to the left half bowl of the ellipsoidal cavity by electron beam welding; the first end of the first transition section is connected to the right half bowl of the ellipsoidal cavity by electron beam welding; the end of the triangular beam tube is connected to the second end of the first transition section by an electron beam welding flange. The present invention has low power loss, high impedance characteristics and good operational stability. The present invention can be widely used in the field of superconducting radio frequency cavity technology.

This invention relates to the field of particle acceleration technology, and provides a radio frequency quadrupole accelerator for multiple vacuum scenarios. The accelerator includes a radio frequency cavity and a vacuum cover. The cavity wall of the radio frequency cavity has grid holes for evacuation. The vacuum cover is detachably installed at the grid hole location. When the vacuum cover is installed at the grid hole location, it maintains a vacuum environment within the radio frequency cavity in independent vacuum applications. When the vacuum cover is detached from the grid hole location, it places the radio frequency cavity within a vacuum chamber in integrated vacuum applications. This invention, by providing evacuation channels through grid holes in the cavity wall of the radio frequency cavity, eliminates the need for the welded vacuum flange structure of existing radio frequency cavity walls, effectively reducing the lateral dimensions of the radio frequency cavity and thus its volume, enabling miniaturized accelerator design. Furthermore, the grid hole structure effectively reduces the impact of the vacuum channels on the radio frequency performance of the radio frequency cavity.

A method for mixed signal synchronization for a charged particle column includes generating an optical pulse signal from a light source that emits a light beam pulse towards a sample within the charged particle column, generating a radio frequency (RF) signal associated 5 with a RF cavity that pulses a charged particle beam towards the sample, generating a composite signal using at least the RF signal and the optical pulse signal, and controlling, based at least in part on the composite signal, at least one of i) the light source or ii) RF signals for the RF cavity such that light beam pulses and charged particle beam pulses are synchronized at the sample.

The utility model discloses a radio frequency endoscope electrode hook which comprises electrode hook bodies and a handle body used for containing the electrode hook bodies, the number of the electrode hook bodies is three, the three electrode hook bodies are all located in the handle body, and the three electrode hook bodies are sequentially arranged from bottom to top. A rotary linkage switching mechanism used for switching the electrode hook body is arranged in the handle body, the rotary linkage switching mechanism comprises a fixed shaft installed in the handle body and three rotary sleeves located on the outer surface of the fixed shaft. The three electrode hook bodies are stored by arranging the handle body, and one of the electrode hook bodies located at the two ends of the electrode hook body can be synchronously unfolded during storage when the electrode hook body located in the middle is clockwise or anticlockwise stored by medical staff through the arranged rotary linkage switching mechanism, so that storage and unfolding are synchronously carried out; and medical staff can conveniently and quickly switch and use the electrode hook bodies with different model parameters.

The utility model relates to the technical field of vessel forceps, and discloses a radio frequency endoscope electrode vessel forceps, which comprises a first vessel forceps handle and a second vessel forceps handle rotatably mounted at the top of the first vessel forceps handle, and contraction cavities are formed in one end of the first vessel forceps handle and one end of the second vessel forceps handle. Limiting holes are evenly formed in the sides, away from each other, of one ends of the first vessel forceps handle and the second vessel forceps handle, and a telescopic rod is movably installed in the contraction cavity. The telescopic rod is pulled outwards, one end of the limiting block automatically moves to the interior of the limiting hole in one side, the telescopic rod is limited and fixed through the elastic force effect of the spring, and therefore the distance between the electrode vessel forceps head and the joint of the rotating shaft is prolonged to a proper length; and the joint of the rotating shaft cannot extend into the cortex, so that the situation that the difficulty of an operation is increased due to bleeding caused by the fact that the rotating shaft clamps the cortex such as tissue when medical personnel clamp the cortex is avoided.

The present application relates to a kind of general microstrip printed board extremely low cavity ratio implementation method, comprising the following steps: take out conductive silver paste and then stir, conductive silver paste is coated in radio frequency cavity bottom, then conductive silver paste is flattened;Microstrip printed board is placed in radio frequency cavity;Again, fluorosilicone rubber flexible press block and aluminum alloy rigid press block are sequentially loaded into radio frequency cavity;Using screw and nut, lower pressing clamp, upper pressing clamp and radio frequency cavity are pressed, so that the double-layer press block structure of fluorosilicone rubber flexible press block and aluminum alloy rigid press block extrudes microstrip printed board, the close adhesion of microstrip printed board and radio frequency cavity is realized;The fixed radio frequency shell and double-layer press block structure are placed in oven, and the baking time in oven is at least extended by more than 1 times than the specified curing baking time of conductive silver paste.The above technical scheme can effectively solve the technical problem of high cavity ratio when microstrip printed board is bonded with radio frequency shell.

This invention discloses a method, apparatus, device, and medium for online beam synchronization phase measurement based on virtual open-loop technology, comprising: obtaining the original cavity pressure and original forward voltage of the radio frequency cavity and performing calibration and normalization processing to obtain the cavity pressure. V C and forward voltage V F Based on cavity pressure V C and forward voltage V F Establish the cavity differential equation; calculate the steady-state detuning Δ based on the cavity differential equation. oh Based on steady-state detuning Δ oh And based on the cavity pressure when there is no beam. V C and forward voltage V F The cavity pressure change under the combined effects of the beam current and the radio frequency loop was calculated during closed-loop operation. v c and forward voltage change v f Establish a small-signal differential equation; based on the small-signal differential equation, solve for the loop driving term. u Caused cavity pressure changes v cf Based on cavity pressure changes v c and cavity pressure changes v cf The cavity pressure change under beam term excitation alone was obtained. v vcb And reconstruct the cavity pressure including beam loading effect under the "virtual open-loop" condition. V C，VOL Based on cavity pressure V C,VOL phase ∠ V C,VOL Calculate the beam phase.

The invention discloses a radio frequency cavity tuning control device and method. The device comprises a cavity frequency detection unit, a tuning control unit, a frequency coarse tuning unit and a frequency fine tuning unit, the cavity frequency detection unit is used for collecting a radio frequency cavity resonant frequency signal of the radio frequency cavity and outputting the signal to the tuning control unit; the tuning control unit is used for obtaining a frequency difference according to the radio frequency cavity resonant frequency signal and a target resonant frequency signal, generating a corresponding tuning signal according to the frequency difference and outputting the tuning signal to the frequency coarse tuning unit and the frequency fine tuning unit; the frequency coarse adjustment unit is used for acting on the radio frequency cavity during working and is also used for preliminarily adjusting the resonant frequency of the radio frequency cavity; and the frequency fine adjustment unit is used for acting on the radio frequency cavity during working and is also used for finely adjusting the resonant frequency of the radio frequency cavity. According to the invention, the resonant frequency of the radio frequency cavity is adjusted by adopting a scheme of combining two modes of coarse adjustment and fine adjustment, and large-range and high-precision control of the resonant frequency of the radio frequency cavity is realized.

The present application relates to the technical field of particle accelerator, and provides a radio frequency cavity spark position diagnosis method based on differential time of flight; the method adopts a double-channel differential time of flight measurement architecture, installs a fast-response arc light detector symmetrically at two ends of a radio frequency cavity, captures a spark event light signal in real time, and records double-channel original waveform data; then, dynamic amplitude normalization processing is performed on the signal to eliminate sensor gain difference; a time difference is calculated by analyzing a step response parameter, a least square method with a shared slope is used to fit a model to reverse a theoretical time point, the time difference is converted into a spatial distance difference by combining an electromagnetic wave propagation speed, and finally, a spark point position is determined. The present application realizes centimeter-level positioning, greatly improves anti-interference capability and positioning stability, has real-time online monitoring and fast response capability, reduces hardware cost by more than 90%, can be seamlessly integrated with an existing system, and improves convenience and economy of field application.