48 results about "Klystron" patented technology

The invention belongs to the field of particle accelerator microwaves, and particularly relates to a C-band compact spherical microwave pulse compression device which comprises a shell, a dual-polarization mode coupler and a circular waveguide, a spherical energy storage cavity is formed in the shell, and the circular waveguide and the spherical energy storage cavity are communicated through a coupling hole; the dual-polarization mode coupler comprises a rectangular waveguide, a butterfly-shaped matching section and a cylindrical matching section. According to the klystron radio frequency pulse compression circuit, the radio frequency pulse with the pulse width of 2.5 microseconds of the klystron can be compressed to 300ns, the average power gain in a single pulse is more than 4 times, the peak power gain is 6.3 times, and the compression efficiency is about 54%. According to the dual-polarization mode coupler, the functions of power distribution, mode conversion and polarization mode generation are synchronously realized, a TE10 mode in a rectangular waveguide is converted into two polarization TE11 modes which are equal in amplitude and orthogonal in phase, and then the two orthogonal TE114 modes are excited in a spherical energy storage cavity.

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 discloses a temperature monitoring system suitable for a fusion reactor low-clutter system and an over-temperature protection method. The temperature monitoring system comprises a high-speed temperature acquisition unit, a thermocouple sensor, an industrial control upper computer and a database server. A microwave excitation signal of the microwave excitation source is amplified by the microwave source klystron and then transmitted to the low-clutter coupled antenna through the microwave transmission line, and a plurality of temperature measuring points are arranged on the waveguide surface of the microwave transmission line and the end face of the low-clutter coupled antenna. Measurement output ends of the thermocouple sensors are uniformly accessed and gathered into the high-speed temperature acquisition unit and are uploaded to the industrial control upper computer, and the industrial control upper computer records and stores acquired multi-channel real-time temperature data, control signal output values and alarm events into the database server. The method has the advantages that early warning and temperature regulation are carried out for potential thermal runaway faults, so that the equipment safety of a high-power microwave transmission device and the normal operation of a low-clutter current driving system are guaranteed.

A linear accelerator apparatus suitable for radiotherapy applications such as FLASH radiotherapy, comprising an apparatus for accelerating a beam of electrons 412 provided by an injector 410 through t

The utility model discloses a kind of cathode heater subassemblies for klystron electron gun, it is characterized in that, including: cathode base, heater sleeve, heater and detachable heat shield assembly, the upper and lower two end surfaces of cathode base are respectively provided with emitting surface and mounting groove, heater sleeve is detachably fixed in mounting groove, and the end surface of heater sleeve back to cathode base is equipped with accommodating groove;Heater is installed in accommodating groove, and the part of heater in accommodating groove is wrapped with insulating layer;Heat shield assembly includes outer heat shield and inner heat shield, outer heat shield is sleeved in cathode base, and inner heat shield is installed in outer heat shield and covers heater sleeve and heater.The utility model can realize reversibility dismounting and maintenance, and heater material volatilization can be avoided directly deposited on the emitting surface of cathode base, help to maintain the emitting surface cleanliness of cathode base, to improve electron emission efficiency, high-temperature solder can also be reduced in use, reduce cost.

The invention discloses a klystron residual life prediction system and a klystron residual life prediction method, belongs to the technical field of electron linear accelerators, and aims to solve the problems that no method for predicting the klystron residual life exists, maintenance and replacement are often carried out when the klystron cannot work suddenly, and stocking / replacement of the klystron needs a quite long time, so that the klystron is inconvenient to use. The system comprises a data acquisition unit, a data transmission unit, a data storage unit, a data operation unit and a data output unit. By collecting and analyzing the key operation data of the klystron, the residual life of the klystron can be predicted more accurately, and maintenance or replacement plan errors caused by inaccurate prediction are avoided; by making a maintenance or replacement plan in advance, the shutdown time of equipment caused by sudden failure of the klystron can be shortened, so that economic loss caused by shutdown is reduced, and meanwhile, reasonable spare part inventory management can also avoid extra cost caused by insufficient spare parts or untimely replacement.

The invention provides a method, a device and equipment for realizing miniaturization of an electronic optical system of a klystron, which can be applied to the technical field of vacuum electronic devices. The method for realizing miniaturization of the electron optical system of the klystron comprises the following steps: acquiring a first target parameter of an electron gun and an initial permanent magnet focusing system; according to the first magnetic induction intensity, the magnetic induction intensity area range of the initial permanent magnet focusing system is adjusted, and a first magnetic induction intensity curve is obtained; adjusting the initial structure parameters by simulating a working state of embedding an electron gun corresponding to the initial structure parameters into the middle permanent magnet focusing system to obtain a second magnetic induction intensity curve; and embedding the electron gun corresponding to the target structure parameter corresponding to the second magnetic induction intensity curve into the target permanent magnet focusing system to obtain the electron optical system of the target speed regulation tube.

According to one embodiment, a klystron includes a high-frequency interaction unit, a main magnet arranged in a ring shape around the high-frequency interaction unit, an output waveguide, an auxiliary magnet arranged in a ring shape opposing the output waveguide, an output unit for extracting high-frequency power from the output waveguide, and an output adjustment mechanism which adjusts the output of the high-frequency power extracted from the output unit by deforming the output waveguide. In the output adjustment mechanism, the output waveguide is deformed by engaging a distal end of a jig inserted from an outside of the auxiliary magnet via a jig insertion hole with an engagement member and pushing or pulling the engagement member.

The application provides a kind of klystron high-dimensional parameter optimization method and system, comprising: using klystron one-dimensional large signal simulation software KlyH, the input design parameter is simulated and calculated, and initial data set containing design parameter and corresponding output parameter is generated;Regression prediction model of design parameter to output parameter is constructed, the normalized output change rate of design parameter is calculated based on regression prediction model, and the sensitivity of each design parameter to output parameter is determined according to the normalized output change rate;According to the sensitivity, the range of each design parameter is dynamically adjusted, the optimization search interval of each design parameter is obtained, and multi-objective optimization algorithm is used to optimize and solve in the optimization search interval, and the optimal solution set is obtained.The dimensionality reduction and search space compression of klystron design parameter are realized, the calculation efficiency and search quality are further improved, and reliable support can be provided for intelligent optimization design of high-performance klystron.

The invention provides an open type absorption cavity for a TM220 higher-order mode klystron and a preparation method and application of the open type absorption cavity. The open type absorption cavity is arranged in a magnetic field distribution area of a TM120 mode and a TM210 mode in an output cavity of a high-order mode klystron, and comprises a frame structure and an attenuation material body filled in the frame structure, the frame structure comprises an upper base, a lower base and a plurality of connecting pieces, the upper base and the lower base are arranged in parallel, the connecting pieces are vertically connected between a plurality of pairs of aligned corners of the upper base and the lower base respectively, a cavity structure with an open side face is defined by the upper base, the lower base and the connecting pieces, and the cavity structure is filled with the attenuation material body; the outer side faces of the attenuation material body and the peripheral face of the connecting piece are arranged in a coplanar mode, the open state of the four outer side faces of the attenuation material body is kept through the frame structure, the open outer side faces make direct contact with and are coupled with a magnetic field generated in an output cavity of the high-order mode klystron, and suppression and absorption of a TM120 mode and a TM210 mode are achieved.

An electromagnetic power source (100, Fig. 1), e.g. a cylindrical or co-axial cavity gyrotron, surface wave source, klystron or travelling wave tube, configured to generate microwave or terahertz power modes for heating plasma in a nuclear fusion reactor (300, Fig. 6) is described. The power source comprises an excitation cavity 108 configured to generate an electromagnetic power mode 112, wherein the excitation cavity comprises a first, inner layer 122 thermally coupled to a second, outer layer 124, wherein the first layer comprises electrically conducting metal, e.g. copper, silver or gold, and the second layer comprises diamond. The diamond of the second layer may be a metal composite diamond or may be formed by chemical vapour deposition (CVD). The second layer may, for example, comprise: a unitary structure; a plurality of coaxially stacked, hollow cylindrical or toroidal segments (130, Fig 8a); or a plurality of rectangular bars joined using a brazing or bonding material (123, Fig. 4).

The application provides a high-frequency structure loaded with a four-bridge full-metal superstructure unit, and belongs to the technical field of high-power vacuum electron devices. The structure realizes miniaturization of a multi-beam klystron high-frequency structure by loading a four-bridge full-metal superstructure unit in the multi-beam klystron high-frequency structure. Meanwhile, a circular through hole is arranged in the axial center area of the four-bridge full-metal superstructure unit, and by adjusting the radius of the circular through hole and the radius of the superstructure resonant cavity, the electric field intensity distribution in the inner and outer circle electron beam channels can be effectively controlled under the premise that the working frequency of the resonant cavity basic mode electric field does not deviate, that is, the electric field in the axial center area is weakened, and electromagnetic energy is redistributed in the radial direction, so that the electric field consistency in the multi-circumference electron beam channel is effectively improved while the multi-beam klystron is miniaturized, the difference in the modulation effect of the inner and outer circle electron beams is reduced, and the electron efficiency and operation stability of the multi-beam klystron are improved.

The embodiment of the present application provides a dual-energy electron irradiation accelerator structure, which comprises an accelerating tube, a klystron, an accelerating tube electron gun, a klystron electron gun, a first output assembly and a second output assembly. The accelerating tube is communicated with the klystron. The accelerating tube electron gun is arranged at one end of the accelerating tube. The klystron electron gun is arranged at one end of the klystron. The first output assembly is arranged at the other end of the accelerating tube and is used for outputting a first electron beam from the accelerating tube. The second output assembly is arranged at the other end of the klystron and is used for outputting a second electron beam from the klystron. The dual-energy electron irradiation accelerator structure of the embodiment of the present application has high utilization efficiency of the electron beam.

The invention discloses a control system and method for continuously adjusting the output power of a low-clutter system, and the system comprises a local oscillator source, a power divider, and a plurality of klystron amplification branches connected in parallel, the local oscillator source generates an initial microwave signal, the signal is distributed to each klystron amplification branch connected in parallel through the power divider, and the klystron amplification branches are connected in parallel. A PIN electrically controlled attenuator in the klystron amplification branch receives a control voltage from a control system, and a microwave switch receives a digital switch signal from the control system and is used for on-off control of the branch; the signal processed by the klystron amplification branch is amplified by the klystron and then enters the bidirectional coupler, and the bidirectional coupler is used for coupling sampling signals of incident power and reflection power and sending the sampling signals to the control system; the microwave power output by the bidirectional coupler is injected into the plasma; the method has the advantages that the problem that the power regulation range of an existing system is limited, and particularly continuous regulation cannot be achieved in a low-power section is solved.

The invention discloses a high-power klystron electron gun surface electric field gradient optimization method based on a genetic algorithm, and belongs to the field of microwave vacuum electron tube design. The method is used for optimizing the focusing electrode of the electron gun, and comprises the following steps: determining basic structure parameters of a cathode and an anode of the electron gun according to the Pearls theory; parameterizing the focusing electrode to form an initial structure model; calling DGUN software to carry out two-dimensional beam simulation calculation; establishing an NSGA-II multi-objective optimization program based on Python, and obtaining a Pareto optimal solution set by taking electron beam current, waist radius and surface electric field gradient as optimization objectives; and finally, verifying an optimization result through CST three-dimensional simulation. According to the method, design efficiency is remarkably improved while design indexes are met, the maximum electric field gradient of the surface of the electron gun is effectively reduced to be about 20 kV / mm, energy distribution is more uniform, the vacuum breakdown risk is reduced, and the method is suitable for optimal design of the high-power klystron electron gun.

The application discloses an X-band high-power wideband velocity modulation tube amplifier, comprising: an electron beam emitting module for generating a circular high-impedance high-current relativistic electron beam; a wideband injection module for externally injecting a microwave signal, absorbing the microwave signal, and preliminarily velocity modulating the high-current relativistic electron beam generated by the electron beam emitting module to convert the high-current relativistic electron beam into a gap electric field modulation electron beam; a high-frequency interaction module for further modulating the gap electric field modulation electron beam converted by the wideband injection module and generating bunching to increase the fundamental wave current modulation depth of each frequency of the high-current relativistic electron beam; and a wideband extraction module for converting the kinetic energy of the electron beam after the bunching of the high-frequency interaction module into microwave energy and coupling the microwave energy to an external circuit. The velocity modulation tube amplifier can realize high-power microwave output of corresponding frequencies and improve the working bandwidth of the velocity modulation tube amplifier in the X-band.

This invention discloses a high-frequency structure and field uniformity optimization method for an S-band multi-beam klystron. By coupling a radial line and a coaxial line at the middle of the right side of the inner wall of the output coaxial resonant cavity to form an axisymmetric structure, and by adjusting the width of the radial line and the inner and outer diameters of the coaxial line, the operating mode frequency and external quality factor meet the requirements, thus obtaining an output coaxial resonant cavity with field uniformity. This ensures that almost every beam in the multi-beam klystron experiences equal modulation, naturally suppressing the generation of reflected electrons in the output resonant cavity and significantly improving the device's performance.

The invention discloses a control system and a control method for synthesis of multiple paths of high-power transmitters, and relates to the technical field of high-power microwave transmission, the system comprises a radar master control module, a transmitter master control module, a radar microwave excitation module, N transmitter control modules, N transmitters, N waveguide directional couplers, a microwave monitoring module and a power synthesizer, and N is greater than or equal to 2; when the power synthesis of multiple paths of high-power transmitters is carried out, the synchronization of the power output and closing of the multiple paths of transmitters in time can be realized; when any transmitter breaks down, microwave power output of all the transmitters is closed at the same time, the advantages of being good in synchronism and high in response speed are achieved, the duration time of large standing waves generated by inconsistent input of the power combiner is shortened, and an expensive and delicate final amplifier klystron is protected.

The utility model discloses a kind of krah pipes with reinforcing structure, including krah pipe body, the krah pipe body is composed of inner wall layer and outer wall layer, spiral reinforcing rib is wound between the inner wall layer and outer wall layer and located the surface of inner wall layer, the winding position of the spiral reinforcing rib additionally has grid belt layer with bonding, the grid belt layer is wrapped in the outer surface of inner wall layer, the upper and lower two ends surface of the krah pipe body is coated with anticorrosive coating, and anticorrosive coating is inside and outside double layer setting, and inner layer is coated in the inner surface of krah pipe body. The utility model is by being arranged between the inner wall layer and outer wall layer of krah pipe body spiral reinforcing rib and grid belt layer, can effectively improve the overall strength and compression resistance of krah pipe, spiral reinforcing rib can be when pipeline is subjected to pressure, pressure is dispersed to whole pipeline structure, grid belt layer further enhances the stability of pipeline, prevent pipeline deformation and breakage.

The positioning device of the anode and the focusing electrode of the strip electron beam klystron comprises a base forming a containing space with an upper end opening, a gun shell being detachably installed in the containing space; a first adjusting assembly is installed on the base for adjustably setting a second positioning member on a first positioning member; an adjusting ring is arranged on the upper end of the second positioning member instead of the anode; the first adjusting assembly adjusts the parallelism and the height difference between the adjusting ring and the focusing electrode of the focusing electrode assembly to position the first positioning member in the axial direction; the second adjusting assembly drives the second positioning member to move and rotate relative to the gun shell in the radial direction of the gun shell to adjust the concentricity of the first axis on which the adjusting ring is located and the second axis on which the focusing electrode is located, adjust the included angle of the adjusting ring and the focusing electrode in the horizontal plane, position the second positioning member and the first positioning member, and realize the positioning of the anode assembly and the focusing electrode assembly.

The invention relates to a medical superconducting particle linear accelerator which comprises an injector, a superconducting short acceleration mechanism and a superconducting edge coupling acceleration cavity. The superconducting short acceleration mechanism is then connected in series with the superconducting edge coupling acceleration cavity, and particles generated by the injector sequentially pass through the superconducting short acceleration mechanism and the superconducting edge coupling acceleration cavity; each superconducting short acceleration mechanism and each superconducting edge coupling acceleration cavity are provided with a superconducting klystron high-frequency power source; and the liquid helium preparation and compensation mechanism provides a liquid helium refrigeration working medium. According to the medical superconducting particle linear accelerator, the injector, the short acceleration mechanisms and the side coupling acceleration cavities are connected in series to form the medical superconducting particle linear accelerator, a high-frequency power source with a small size is configured for each acceleration unit, all the acceleration units and the high-frequency power sources are superconductive, and therefore the formed superconducting particle linear accelerator has the advantages that the medical superconducting particle linear accelerator is simple in structure and low in cost. The energy consumption is low, the operation cost is low, and radiation therapy is supported.

To provide a multibeam klystron provided with a collector part capable of coping with miniaturization and simplification of a cooling mechanism.SOLUTION: The multi-beam klystron 10 comprises an electron gun part 14 for generating a plurality of electron beams 12, a collector part 18 for capturing the electron beams 12, and a plurality of resonance cavities 21 arranged between the electron gun part 14 and the collector part 18. The collector part 18 has a collector body 30 and a plurality of collector holes 31 which are provided in the collector body 30 and individually capture the electron beams 12.SELECTED DRAWING: Figure 1

The present invention relates to an extended interaction klystron high frequency circuit. The high frequency circuit comprises an electron beam channel and a plurality of resonant cavities, the electron beam channel comprising a first electron beam channel and a second electron beam channel, the plurality of resonant cavities comprising an input resonant cavity, a plurality of intermediate resonant cavities and an output resonant cavity, each resonant cavity comprising a first coupling cavity and a second coupling cavity symmetrically arranged with respect to the first and second electron beam channels, and a plurality of gap cavities respectively interconnecting the first and second electron beam channels and the first and second coupling cavities, the positions and radii of the electron beam channels being such that the resonant cavities operate in TM 21 mode. The extended interaction klystron high frequency circuit operating in anti-symmetric mode according to the present invention allows to realize a single mode high power terahertz klystron operating stably.

The application relates to the technical field of amplifiers, in particular to a non-uniform period phase velocity jump velocity klystron, which comprises an input waveguide, an output waveguide, a coupling cavity, an electron beam channel, a first gap group and a second gap group; the input waveguide and the output waveguide are respectively arranged at two ends of the coupling cavity; a plurality of first gaps are arranged in the first gap group, a plurality of second gaps are arranged in the second gap group, the first gaps and the second gaps are arranged on the lower surface of the coupling cavity in a staggered mode, the axial width of the first gaps and the second gaps is the same, the length of the first gaps and the second gaps is different, the distance between the first gaps and the second gaps presents a decreasing trend along the electron flow direction, and the electron beam channel passes through the first gaps and the second gaps, so that the klystron works in a traveling wave state to obtain a wider frequency band, the phase velocity resynchronization technology is applied, the non-uniform structure is adopted, the electron velocity is synchronized with the high-frequency signal velocity, relatively large power output is obtained, and the electron efficiency is improved.

According to one embodiment, a klystron device includes a klystron body and a focusing magnetic field device. The klystron body has an electron gun section, a collector section, a plurality of cavity resonators, and a plurality of drift tubes. The cavity resonators have nose sections that face each other in an axial direction and form a gap section that is connected to the drift tubes. At least one of the cavity resonators has an electric field correction section in a part of the nose section that makes a space of the gap section different with respect to a space between the nose sections.

This invention discloses a method for realizing a high-efficiency compact klystron based on a hybrid-mode resonator. The method includes: using the clustered center stabilization method (CSM), employing three combinations of hybrid-mode resonators, and optimizing the klystron's performance using large-signal computer software. This method reduces the required number of resonators to five when introducing one higher harmonic cavity or six when introducing two higher harmonic cavities. The three combinations of hybrid-mode resonators include the fundamental frequency f operating in TM mode. 010 Mode, second harmonic 2f operating in TM 020 Coaxial resonant cavity of mode; fundamental frequency f operates in TM 010 Mode, third harmonic 3f operating in TM 030 Coaxial resonant cavity in TM mode; second harmonic 2f operates in TM mode. 020 Mode, third harmonic 3f operating in TM 030 A coaxial resonant cavity in a specific mode. This invention is highly advantageous for reducing the weight and length of beam-wave interaction.

The invention discloses a klystron multi-signal collaborative sparking suppression system and method based on hardware logic, a storage medium and electronic equipment, and the system comprises a fault recognition circuit, a drive blocking circuit and an energy absorption circuit, and the input end of the fault recognition circuit is connected with a load circuit. The output end of the fault identification circuit is respectively connected with the input ends of the driving blocking circuit and the energy absorption circuit; the fault identification circuit comprises an under-voltage detection circuit, an over-current detection circuit, a logic judgment circuit and a signal latch drive circuit. According to the invention, the voltage and current of the load are respectively detected, and whether overcurrent and undervoltage occur is judged by using the comparator; when overcurrent and undervoltage occur at the same time, the logic circuit outputs a fault signal and quickly cuts off a high-voltage power supply driving signal; and finally, the bypass circuit absorbs system stored energy. All the processes are executed by a hardware circuit, and process data are not recorded and stored, so that rapid protection of klystron ignition can be realized.

This invention belongs to the field of vacuum electronic devices, specifically relating to an electron gun design method for a circular single-electron-beam G-band extended interaction klystron. The invention introduces an n (2≤n≤10) periodic structure on the electron gun focusing electrode surface to regulate the electrostatic field distribution, thereby increasing the total emission current of the electron gun cathode and enhancing the electron beam power. This method employs a circular single electron beam, ensuring simple design and fabrication of the magnetic focusing system and stable electron beam transmission. The electron gun focusing electrode uses an n-periodic corrugated control structure, guaranteeing that under G-band conditions and high electron beam voltage, the cathode emission current density is less than 12 A / (cm^2), the total cathode emission current is approximately 0.334 A, and its static flux density is 100%. This invention solves the problems of stable and efficient high-energy electron beam focusing and transmission in existing G-band extended interaction klystrons, while also considering the simplicity of electron gun fabrication and assembly, long cathode life, and a simple magnetic focusing system.

The application provides a low-delay klystron standing wave protection system and method based on a high-speed comparison circuit, relates to the technical field of klystron safety protection, and comprises an input end of a radio frequency sampling and detection unit connected with a klystron radio frequency output unit, and an output end of the radio frequency sampling and detection unit in communication connection with a signal processing and decision unit; the signal processing and decision unit is in communication connection with a machine interlocking execution unit; the signal processing and decision unit and the machine interlocking execution unit are in parallel communication connection through a digital protection signal path and an analog protection signal path; and an output end of the machine interlocking execution unit is connected with a lower controlled system. The application has the effect of super-fast protection, full-power range blind area protection, double protection, high reliability, flexible architecture and easy integration.

Provided herein are fusion reactor devices that utilize electrical dynamic resistance within a resonant cavity. This is accomplished in conjunction with externally or internally magnetically affixed particle accelerator applications, inertial confinement, magnetic target fusion, field-reverse confinement, plasma accelerators, enhanced electro-coagulation, orbitron cylinder or linear magnetron / klystron, and stellarator designs to enhance space-charge polarization (fusion events) within dielectric mediums. This includes liquid water, water mist, gaseous matter, liquid metals, and even the vacuum of space.