29 results about "Klystron" patented technology

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.

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 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.

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 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.

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 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 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.

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.

The invention provides a frequency test system and test method for a klystron high-frequency structure, and the system comprises a fixed frame which is used for fixing the klystron high-frequency structure; the probe extends along the axis direction of the klystron high-frequency structure; the first driving device is connected with the probe, the first driving device is used for driving the probe to move along a first preset direction, and the first preset direction is consistent with the axis direction of the klystron high-frequency structure, so that the probe enters a to-be-detected cavity in the klystron high-frequency structure or is far away from the to-be-detected cavity. According to the frequency test system for the klystron high-frequency structure, the technical problem that the probe position cannot be accurately controlled in the frequency test experiment process in the prior art is solved.

The invention provides a high-frequency system for a third harmonic klystron and a design method. The high-frequency system comprises an electron beam channel for transmitting electron beams and a resonant cavity communicated with the electron beam channel. The resonant cavity is configured to work in a hybrid mode of a fundamental mode and a target high-order mode, so that when the electron beam moves in the electron beam channel and passes through the resonant cavity, the electron beam can interact with high-frequency electric fields of the fundamental mode and the target high-order mode at the same time; the range of the proportion of the resonant frequency of the target high-order mode to the resonant frequency of the fundamental mode is 2.9-3.1. Through the high-frequency system, the problems of insufficient harmonic current and low efficiency caused by the fact that a traditional harmonic klystron only extracts harmonic energy from an output cavity are fundamentally solved.

The invention provides a broadband output circuit for a W-band klystron and a bandwidth optimization method. The broadband output circuit comprises an output resonant cavity, an output waveguide and a filter arranged between the output resonant cavity and the output waveguide. The filter comprises at least one cylindrical waveguide section; the cylindrical waveguide section is used for expanding the output bandwidth of the W-band klystron. Through the output circuit, the W-band klystron can realize obvious bandwidth expansion.

The invention relates to a pulse generator (1) for generating voltage pulses with a pulse shape (6) for a high-frequency power source, in particular a magnetron or klystron (8), wherein the pulse generator (1) for generating the voltage pulses comprises several controllable cells (2) each with at least one charge storage device (3), in particular a capacitor, wherein the cells (2) are configured to contribute to the output of an output voltage generating the voltage pulses in an activated state, wherein the pulse generator (1) comprises a control circuit (5) for individually switching at least a subset of the individual cells (2), wherein the pulse generator (1) is configured to selectively switch the cells (2) individually with the aid of the control circuit (5) in a time-adapted manner in order to approximate the pulse shape (6) to a desired pulse shape (60) with a substantially flat pulse surface for the high-frequency power source.

The application discloses a mixed material input cavity for a pulse magnetic field klystron and an optimization method thereof. The mixed material input cavity comprises an inner conductor, a first outer conductor and a second outer conductor which are sleeved on the inner conductor. A drift tube cavity is formed between the outer wall of the inner conductor and the inner walls of the first outer conductor and the second outer conductor. An injection waveguide is formed between the first outer conductor and the second outer conductor. The injection waveguide and the drift tube cavity are communicated through an input cavity. The input cavity inner wall parts of the inner conductor, the first outer conductor and the second outer conductor are made of metal materials with different electric conductivities. The optimization method comprises optimizing the structure of the mixed material input cavity so that the response time of the metal materials with different electric conductivities to a magnetic field is as consistent as possible. The mixed material input cavity for the pulse magnetic field klystron aims to reduce microwave loss of injected microwaves and reduce eddy current loss.

The invention discloses a klystron body over-current fast protection signal acquisition and recording system, which comprises a high-speed ADC acquisition module for synchronously acquiring multiple paths of klystron body over-current analog signals and converting the signals into digital signals; the FPGA data caching module is connected with the high-speed ADC acquisition module and is used for receiving and caching the digital signals and controlling a data acquisition process; the MCU data processing module is used for configuring system parameters, analyzing instructions of the upper computer, reading cache data and uploading the cache data to the upper computer; the power supply module is used for supplying power to each module in the hardware board card system; the upper computer system is used for setting a trigger threshold value and a sampling parameter of each acquisition channel; performing data frame interaction with the MCU data processing module; displaying the collected waveform data in real time; storing the collected waveform data and the corresponding timestamps in a local database; the device has the advantages that the waveform of the overcurrent signal of the klystron body is recorded in real time, and troubleshooting of the klystron is facilitated.

The invention discloses a miniaturized period reversal permanent magnet focusing system for a high-power klystron, and relates to the field of electron accelerator design. The outer side of each magnetic ring is coaxially sleeved with a first magnetic conductive pole shoe, an even number of symmetrical magnetic conductive bridges are distributed on the outer side of the first magnetic conductive pole shoe in the circumferential direction, and the multiple magnetic conductive bridges are symmetrically arranged in the length direction of the klystron and connected with the first magnetic conductive pole shoes. A period reversal permanent magnet focusing system applied to a multi-beam klystron is used in a high-power single-beam klystron, and the improvement of adding a symmetric magnetic conductive bridge and a first magnetic conductive pole shoe is made, so that the axial focusing magnetic field intensity is enhanced by about 20%-50%, the magnetic energy utilization rate is improved, the size and volume of a used permanent magnet ring are further reduced, and the cost is reduced. The cost is reduced, and the miniaturization of the high-power klystron is promoted.

The invention provides an adaptive control method and system for a klystron of a medical accelerator, the medical accelerator comprises an excitation source used for generating microwave pulses and an accelerating tube used for accelerating injected electronic pulses, and the method comprises the following steps: acquiring a reflected wave signal at the input end of the accelerating tube; calculating the current resonant frequency of the accelerating tube according to the reflected wave signal; and calculating the frequency deviation between the current output frequency of the excitation source and the current resonant frequency of the accelerating tube, and outputting a frequency tuning instruction to the excitation source based on the frequency deviation so as to adjust the output frequency of the excitation source and enable the output frequency of the excitation source to track the resonant frequency of the accelerating tube. The technical problem of logic failure caused by dislocation of a control object in a traditional automatic frequency control scheme is solved, the output frequency of the excitation source is dynamically adjusted through closed-loop control, efficient injection of microwave energy is ensured, and the system stability and clinical reliability of the system are improved to a great extent.

The application discloses a kind of for microwave source driven modular high-voltage power supply and its millisecond level current-limiting pulse modulation method, belong to power electronics and microwave heating technical field.The power supply includes sequentially connected AC input unit, rectification and boost unit, high-voltage filter unit, current-limiting pulse modulation unit and protection unit.Current-limiting pulse modulation unit includes power semiconductor switch tube, drive circuit and series current-limiting inductance, for chopping modulation to anode current when receiving external pulse control signal, make output power switch between peak power and low power in preset pulse period.Protection unit is used to detect fault and send blocking signal.A plurality of power supply modules can be combined by series-parallel connection to expand power.The application realizes millisecond level fast pulse modulation, has modular expansion capacity and multiple fast protection function, suitable for magnetron, klystron and solid-state microwave source driving.

This invention belongs to the field of microwave vacuum electronic devices, specifically providing a trapezoidal subwavelength aperture high-frequency structure for an extended interaction klystron, used to improve the power and gain of the extended interaction klystron and expand its bandwidth. This invention creatively proposes an isosceles trapezoidal subwavelength aperture with a base length proportional to the width of the resonant cavity, thereby designing the input cavity, intermediate cavity, and output cavity. This increases the beam-wave interaction area and characteristic impedance of the intermediate cavity, improving the interaction efficiency while maintaining a low quality factor and avoiding parasitic oscillations. It also increases the characteristic impedance of the input and output cavities, enhancing beam-wave interaction and reducing the input reflection coefficient S. 11 With a relatively large value and a -5dB bandwidth greater than 1GHz, the power feed and bandwidth extension capabilities are further enhanced. Compared with the traditional trapezoidal structure, the extended interaction klystron of this invention has significant advantages in terms of high power, high gain, and wide bandwidth.

The utility model discloses a general compact HPM source device, include: combined cabinet, be assembled from first cabinet and second cabinet, be provided with high pressure pulse modulator unit, control unit, solid state amplifier excitation source unit, distribution unit and standing wave protection unit from below to above in proper order in first cabinet, be provided with high -power klystron in second cabinet, high pressure pulse modulator unit is used for changing 380V alternating current into the pulse high pressure required by high -power klystron cathode, solid state amplifier excitation source unit is used for providing the microwave excitation of high -power klystron when working, standing wave protection unit has two microwave detection mouth outward, is respectively used for monitoring the forward power and reverse power of high -power klystron output, high -power klystron is used for connecting microwave transmission link outward through microwave output mouth, control unit is used for receiving the control instruction of host computer issue, and the device state information is reported to host computer, the utility model discloses compact structure, convenient operation.

1. The name of the design product: permanent magnet focusing klystron. 2. The use of the design product: used as microwave power amplifier. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.

The application provides a high-power klystron collector and a preparation method thereof. By reducing the inner diameter of a straight cylinder part of the collector and lengthening the height of a taper part, part of electrons is intercepted in advance, and the electron density bombarding the top end of the collector is reduced, so that the effect of achieving the same tolerance power as a huge collector is realized under the condition of a small volume of the collector, thereby solving the technical problems of the huge volume and heavy mass of the collector mentioned above.