20 results about "Superconducting radio frequency" patented technology

The invention discloses a high-gradient particle accelerator and a cancer treatment device, and the high-gradient particle accelerator comprises an ion source which is used for generating and leading out a particle beam for treatment; an inlet of the superconducting radio frequency quadrupole field accelerator is connected with the ion source through a low-energy transmission line, and the superconducting radio frequency quadrupole field accelerator is used for pre-accelerating the particle beam generated by the ion source to obtain a low-energy particle beam; an inlet of the superconducting linear acceleration section is connected with an outlet of the superconducting radio frequency quadrupole field accelerator through a first beam transport line, and the superconducting linear acceleration section is used for accelerating the low-energy particle beam led out by the superconducting radio frequency quadrupole field accelerator again to obtain an intermediate-energy particle beam; and an inlet of the annular accelerator is connected with an outlet of the superconducting linear acceleration section through a second beam transport line, and the annular accelerator is used for carrying out ultimate acceleration on the intermediate-energy particle beam led out by the superconducting linear acceleration section so as to obtain a high-energy particle beam with target energy. The scheme that the superconducting linear accelerator is combined with the annular accelerator is adopted, so that particle beam energy is accelerated to target energy meeting cancer treatment.

The invention relates to the technical field of superconducting accelerators, in particular to a solid conduction cooling structure for a superconducting radio frequency cavity. Comprising a double-cell superconducting cavity body, an equator cold ring, a beam tube cold ring and a thermal bridge structure, and through the ingenious design of the equator cold ring, the beam tube cold ring and the thermal bridge structure and the adoption of oxygen-free copper and other materials with good heat conduction performance and mechanical strength, the efficient and uniform cooling effect is achieved, and the service life of the double-cell superconducting cavity is prolonged. Powerful support is provided for miniaturization and industrial application of the radio frequency superconducting technology; according to the invention, stable operation of the superconducting cavity at a proper low temperature can be realized by adopting a commercial refrigerator, a complex thermostat design, an expensive and huge helium liquefaction low-temperature station and a specialized low-temperature station operation and maintenance team are omitted, and the application difficulty of a radio frequency superconducting technology is reduced; the method has natural advantages in miniaturization and industrial application of the radio frequency superconducting technology.

The invention relates to a special-shaped cavity inner wall evaporation magnetron sputtering target material system, and relates to the field of target materials. The device comprises an aluminum alloy bracket, a sputtering system vacuum cavity arranged on the aluminum alloy bracket, a displacement transmission device arranged above the sputtering system vacuum cavity, and a special-shaped cavity magnetron sputtering ellipsoidal target system arranged in the sputtering system vacuum cavity and connected with the displacement transmission device, the external vacuum pump set and the vacuum measuring equipment are arranged at the bottom of a vacuum cavity of the sputtering system, an ellipsoidal single-cell superconducting radio frequency cavity is formed in the vacuum cavity of the sputtering system, and the irregular cavity magnetron sputtering ellipsoidal target system comprises an ellipsoidal niobium target material arranged in the single-cell superconducting radio frequency cavity. And a copper rod is connected between the displacement transmission device and the single-cell superconducting radio frequency cavity. According to the invention, uniform coating can be realized by moving the target material in the radio frequency acceleration cavity and controlling the power of the target material and the sputtering time at the same time; the target material is small in size and can be uniformly placed in an external magnetic field coil.

A device comprises a superconducting radio frequency (RF) signal generator which comprises a plurality of channels. Each channel is configured to generate a corresponding RF signal with a frequency that is controlled by a corresponding direct current (DC) control signal applied to the channel.

The invention relates to the field of superconducting cavity technology application, in particular to a superconducting cavity high-pressure jet cleaning simulation system developed based on an MATLAB software platform and an operation method of the superconducting cavity high-pressure jet cleaning simulation system. The system comprises a model import module, a parameter input module, a simulation calculation module and a result display module, efficient simulation is carried out on the superconducting cavity inner surface high-pressure flushing (HPR) process by utilizing an M-T algorithm, and the system aims at deeply researching the cleaning process and optimizing HPR process parameters, so that the performance and reliability of the superconducting cavity cleaning process are improved, and the service life of the superconducting cavity is prolonged. The device is especially suitable for batch cleaning production requirements before superconductive radio frequency cavities are assembled in an international linear collider (ILC) project. According to the technology, rapid simulation is achieved through a mathematical model, the calculation complexity is remarkably reduced compared with a traditional finite element method, and the method has the advantages of being efficient and accurate and saving resources.

A gas flow meter for all pressures, including fractions of an atmosphere, and for cryogenic temperature systems such as cryomodules for cooling superconducting radio frequency cavities in a particle accelerator. An accurate measurement is critical to determine the quality factor (Q0) of the superconducting cavities. The instrument head, including a superconducting material adjacent to an electric resistance heater, measures gas flow. The power in the heater is increased until the superconductor exhibits ‘normal’ conducting voltage (quench) while an electric current passes through it. The heater power required to drive the superconductor to quench is a function of the gas flow passing the instrument head. Digital control and readout of all critical elements are supplied by a digital control system interfacing to an analogue to digital, digital to analogue (AtoD DtoA) module.

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.

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.

The invention relates to a configurable electronic connection component, fabricated on a substrate, and intended for operation as a switch and / or attenuator. Said electronic component comprises a stack of layers including: - a first layer of a first superconducting cuprate-type material, - a second layer of a second material more electronegative than the first material and deposited on the first layer; - a third layer of an electrically conductive material deposited on the second layer, forming a control electrode; said first layer having a resistivity that varies according to the mole fraction of oxygen in said first material. Figure for the abstract: Fig. 3a

A device comprises a superconducting radio frequency (RF) signal generator which comprises a plurality of channels. Each channel is configured to generate a corresponding RF signal with a frequency that is controlled by a corresponding direct current (DC) control signal applied to the channel.

The application discloses a high-gradient particle accelerator and a cancer treatment device, which comprises an ion source for generating and leading out a particle beam for treatment; a superconducting radio frequency quadrupole field accelerator, the inlet of which is connected with the ion source through a low-energy transmission line, and is used for pre-accelerating the particle beam generated by the ion source to obtain a low-energy particle beam; a superconducting linear acceleration section, the inlet of which is connected with the outlet of the superconducting radio frequency quadrupole field accelerator through a first beam transport line, and is used for re-accelerating the low-energy particle beam led out by the superconducting radio frequency quadrupole field accelerator to obtain a medium-energy particle beam; and a ring accelerator, the inlet of which is connected with the outlet of the superconducting linear acceleration section through a second beam transport line, and is used for finally accelerating the medium-energy particle beam led out by the superconducting linear acceleration section to obtain a high-energy particle beam flow with a target energy. The application adopts the scheme of combining the superconducting linear accelerator with the ring accelerator to realize the acceleration of the particle beam flow to the target energy for cancer treatment.

Superconducting RF module for radiation between 50 and 10000 MHz for particle accelerators, comprising at least one superconducting RF cavity (1) and a means for cooling (2) for the RF cavity (1), characterized in that at least one heating element (4, 5, 6, 9), formed by a resistance heater made of heating wires, in particular made of tungsten or molybdenum, is arranged inside the RF module at the superconducting RF cavity (1) for heating the RF cavity (1).

A device (100) comprises a superconducting radio frequency, RF, signal generator (120) which comprises a plurality of channels. Each channel is configured to generate a corresponding RF signal (RF_1-RF_4) with a frequency that is controlled by a corresponding direct current, DC, control signal (IB1-IB4) applied to the channel.

According to the contact pin structure used for the low-temperature superconducting radio frequency coaxial connector, the insulator is placed in the outer cylinder, the insertion portion of the contact pin body is inserted into the insulator, the insulator is in a boss design, the middle of the insulator is provided with a through hole for the contact pin body to penetrate, the outer surface of the insulator is connected with the outer cylinder in a vacuum brazing mode, and the whole contact pin body extends in the longitudinal direction. The insulator is of an integrally-formed structure and is sequentially divided into a deformation part, a connecting part and an inserting part from top to bottom, the diameter of the inserting part is smaller than that of the connecting part, deformation grooves are formed in the circumferential direction of the deformation part, the connecting part is a transition piece, the lower surface of the transition piece is in vacuum brazing connection with the upper surface of the insulator, and multiple destressing grooves with downward openings are formed in the connecting portion of the transition piece and the insulator.

A Nb55Ti plate for a superconducting radio-frequency cavity and a preparation method thereof are provided, which relates to the technical field of superconducting acceleration cavities. The method includes: forging, processing of a surface of a slab blank, rolling, processing of a surface of a plate blank, heat treatment of a processed plate blank, and processing of a heat-treated plate blank. By a rational design of processing procedures and limits of process parameters, and combined with vacuum heat treatment and surface processing, the method effectively breaks and refines initial microstructure of a Nb55Ti blank, significantly improves uniformity of grain size, uniformity of transverse and longitudinal structure, and properties of the Nb55Ti plate, and enhances hardness of the Nb55Ti plate, which is suitable for superconducting radio-frequency cavities. Moreover, the method increases processing yield of the Nb55Ti plate, reduces raw material costs, and enables stable mass production.

The invention provides a high-current superconducting proton linear accelerator failure compensation-matching method and system, and belongs to the technical field of particle accelerators, and the method comprises the following steps: a fault detection step: determining the position and failure degree of a failed superconducting radio frequency cavity; a phase shift compensation step: adjusting radio frequency parameters of the working cavity in the period of the failure cavity through analytical calculation so as to recover longitudinal phase shift; an envelope matching step: optimizing matching cavity parameters in a downstream local range of the failure cavity to minimize a matching error between a beam longitudinal envelope and a design envelope; and an energy compensation step, in which compensation cavity parameters are adjusted under constraint conditions to recover total beam energy, and a corresponding system comprises a fault detection module, a core processing module, a parameter output module, a verification feedback module and the like. According to the method, a complex multi-target recovery problem is decomposed into a three-step collaborative recovery strategy of phase shift compensation, envelope matching and energy compensation, the recovery time is shortened to several minutes, and high-precision collaborative rapid recovery of beam energy, energy dispersion and emittance is realized.

The invention discloses a cathode rod auxiliary mounting mechanism which is used for assisting a cathode rod in an electrochemical polishing device to be horizontally inserted into a superconducting radio frequency cavity, and relates to the technical field of superconducting radio frequency cavities. A cathode rod butt joint module of the cathode rod auxiliary installation mechanism comprises a first guide rail, a cathode rod fixing assembly and a supporting assembly. A hard guide rod butt joint module of the cathode rod auxiliary installation mechanism comprises a second guide rail, a hard guide rod fixing assembly and a hard guide rod, the first guide rail and the second guide rail are arranged on the same straight line in a spaced mode, and a cathode rod fixing assembly and a supporting assembly are arranged on the first guide rail in a sliding mode. The supporting assembly is located on the side, away from the second guide rail, of the cathode rod fixing assembly. According to the cathode rod auxiliary mounting mechanism provided by the invention, the end part of the cathode rod is fixed by the hard guide rod and penetrates into and out of the superconducting radio frequency cavity in a relatively high collimation state, so that the condition that the cathode rod collides with the inner surface of the superconducting radio frequency cavity due to gravity deformation can be avoided.

The present invention relates to a photocathode superconducting radio frequency electron gun, comprising a quarter-wavelength resonant cavity, a first coaxial waveguide, and a second coaxial waveguide. The quarter-wavelength resonant cavity comprises cavity sidewalls, an anode portion, and a cathode portion. The anode portion is characterized in that: the anode portion comprises a cutoff waveguide arranged at the axis of the quarter-wavelength resonant cavity; the cutoff waveguide is connected to a bottom fillet of the anode surrounding it, and the bottom fillet of the anode is arched rearward; an anode top fillet is provided outside the bottom fillet of the anode, surrounding the cutoff waveguide and the bottom fillet, and arching forward; the top fillet of the anode and the bottom fillet are connected by a transition in the middle of the anode. The present invention provides a photocathode superconducting radio frequency cavity and a novel anode structure for a quarter-wavelength cavity, which generates a stronger electric field and a smaller magnetic field.

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.

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.