27 results about "Rf cavity" patented technology

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.

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 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 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 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.

The invention discloses a beam synchronous phase online measurement method, device and equipment based on a virtual open loop technology, and a medium. The method comprises the following steps: obtaining an original cavity pressure and an original forward voltage of a radio frequency cavity, and carrying out calibration and normalization processing to obtain a cavity pressure VC and a forward voltage VF; establishing a cavity differential equation based on the cavity pressure VC and the forward voltage VF; calculating steady-state detuning delta omega based on a cavity differential equation; based on the steady-state detuning delta omega, according to the cavity pressure VC and the forward voltage VF when the beam current exists or not, calculating to obtain the cavity pressure change vc and the forward voltage change vf under the combined action of the beam current and a radio frequency loop during closed loop, and establishing a small signal differential equation; based on a small signal differential equation, cavity pressure change vcf caused by a loop driving item u is solved; based on the cavity pressure change vc and the cavity pressure change vcf, obtaining the cavity pressure change vvcb under the independent excitation of the beam item, and reconstructing the cavity pressures VC and VOL containing the beam load effect under the virtual open loop condition; and calculating the beam phase based on the phase VC and VOL of the cavity pressure VC and VOL.

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 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 main body and a partition plate, the partition plate is arranged in the main body and divides the main body into a radio frequency cavity and an unfreezing cavity, and the unfreezing cavity is provided with a containing face for containing objects to be unfrozen; the polar plate is mounted in the radio frequency cavity and is used for radiating radio frequency energy to the thawing cavity; and in the height direction of the main body, the distance H1 between the polar plate and the placing surface is 25%-50% of the distance H4 between the top surface of the thawing cavity and the placing surface. The distance H1 between the polar plate and the placing surface is 25%-50% of the distance H4 between the top surface of the unfreezing cavity and the placing surface, so that the radio frequency unfreezing device can obtain good balance between the unfreezing speed and the unfreezing uniformity, the unfreezing speed and the unfreezing uniformity have good compromise at the moment, and the ratio range allows radio frequency energy to effectively penetrate through to-be-unfrozen articles, so that the unfreezing efficiency is improved. And the problems of excessive heating caused by too close distance and thawing efficiency reduction caused by too far distance are avoided to a certain extent.

The invention provides a non-interception type beam energy gain measurement method and system. The non-interception type beam energy gain measurement method is used for measuring the energy gain obtained when a beam passes through a radio frequency cavity, and the non-interception type beam energy gain measurement method comprises the following steps: obtaining the beam intensity Ib of the beam passing through the radio frequency cavity on line; acquiring beam power Pb of the beam absorbed from the radio frequency cavity; a beam energy gain delta W is calculated according to a beam energy gain formula, and the beam energy gain formula is shown in the specification, delta W is beam energy gain, Pb is beam power, and Ib is beam intensity. According to the non-interception type beam energy gain measurement method, the energy gain obtained when the beam passes through the radio frequency cavity can be measured in real time, the state of the radio frequency cavity can be represented more accurately, and the beam load effect can be quantized more accurately.

The application particularly relates to a digital low-level control system based on RFSoC; the control system relates to: when a radio frequency switch is closed, a radio frequency direct sampling link performs first preset processing on a received radio frequency reference signal / radio frequency sampling signal to obtain an I-Q reference signal / I-Q sampling signal; a programmable logic unit obtains I control quantity and Q control quantity through differential-PID operation based on the obtained I-Q reference signal and I-Q sampling signal; the radio frequency direct output link performs second preset processing on the obtained I control quantity and Q control quantity to obtain an analog radio frequency excitation signal; a radio frequency front-end module receives the obtained analog radio frequency excitation signal, and loads the analog radio frequency excitation signal to a radio frequency cavity based on a preset closed-loop control loop to control the radio frequency cavity. Based on the application, system integration and frequency adaptation capability can be improved while system structure is simplified.

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 main body and a pole plate, the main body is provided with a radio frequency cavity and an unfreezing cavity, the pole plate is arranged in the radio frequency cavity and used for radiating radio frequency energy to the unfreezing cavity, and the radio frequency energy provided by the pole plate is reduced in the direction from the middle of the main body to the edge of the main body. After the design is adopted, the electromagnetic field intensity at the edges and corners of food materials is reduced, the thawing speed at the edges and corners of the food materials is reduced, non-uniform thawing caused by the corner effect of the food materials can be counteracted, and the more uniform thawing effect of each part of the food is realized.

Forming superconducting radio frequency (SRF) cavities with hydrostatically controlled bulging, using a pressurizing incompressible medium, such as urethane elastomer, for hydroforming a metal tube in a mold. The urethane elastomer functions as the pressurizing incompressible medium in the hydroforming process. Stretch- thinning of the metal tube wall is reduced by a decrease in concentrated bending deformation thereof. Friction between the inner wall of the metal tube and the incompressible medium constrains the plastic flow of the tube wall material, thus reducing the stretch deformation and thickness reduction thereof. A stepped press ram may be used to pressurize the incompressible medium material and then pushes on an end of the tube to feed extra tube length into the expanding tube wall for reducing thinning thereof.