40results about "Klystrons" 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.

This invention discloses a high-efficiency microwave pulse compressor, belonging to the field of high-power microwave technology. It includes a first mode converter, a first transition structure, a dispersion structure, a second transition structure, a second mode converter, and a radiation structure. These components are connected in series. The first mode converter converts the mode of the input microwave pulse into the operating mode of the dispersion structure. The mode-converted microwave pulse is efficiently transmitted to the dispersion structure via the transition structure. The dispersion structure compresses the input frequency-modulated pulse. The second transition structure and the second mode converter convert the compressed high-power short pulse into the microwave mode required for radiation. The radiation structure directionally radiates the high-power short microwave pulse to a space target. This high-efficiency microwave pulse compressor features a simple system, compact structure, and large power capacity. It has good application prospects in microwave source arraying and modularization, and is expected to improve the performance of high-power microwave systems.

The application discloses a K-band transit-time oscillator based on two-stage modulation and distributed extraction, which comprises an inner cylinder and an anode outer cylinder sleeved outside the inner cylinder, a circular annular cavity is formed between the inner cylinder and the anode outer cylinder, the cavity comprises a first drift tube, a first modulation cavity, a second drift tube, a second modulation cavity, a third drift tube, an extraction cavity and a first coaxial output waveguide which are sequentially communicated, a circular annular second coaxial output waveguide is further arranged at an output end of the inner cylinder, the first coaxial output waveguide and the second coaxial output waveguide are coaxially arranged, the extraction cavity is further communicated with the second coaxial output waveguide, and the K-band transit-time oscillator is rotationally symmetrical about a central axis of the inner cylinder. The two-stage modulation structure is adopted to increase the depth of fundamental wave current modulation, so that the output efficiency is improved, and the double-side channel distributed extraction mode is adopted to improve the output power, so that the problem that the output power is limited while high efficiency output is realized at a high frequency band is overcome.

Embodiments of the present disclosure relate to a vacuum and high voltage radio frequency system for a medical linear accelerator. A radio frequency system for a radiotherapy machine includes: a first portion including a first gas at a first pressure; a second portion comprising a second gas at a second pressure, the second gas being different from the first gas; and a component between the first portion and the second portion, the component containing a first gas at a first pressure.

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 present application relates to an electron gun, which has a cathode having an electron emission surface, a planar shape of which is circular, and which emits electrons, a heater which warms the cathode, and an anode which applies a positive potential to the cathode and extracts the electrons in a certain direction. The cathode has a through-hole along a central axis of the cathode in a central portion thereof, and at least one of an opening edge portion of the through-hole on the electron emission surface side and an inner surface of the through-hole has a non-emission layer, or the opening edge portion of the through-hole on the electron emission surface side is a chamfered C face or a chamfered R face.

The embodiment of the invention provides a vacuum electron tube, a radio frequency module and communication equipment, and relates to the technical field of vacuum electron tubes. The vacuum electron tube comprises a metal shell and a sealing cover plate. The sealing cover plate is connected to the metal shell in a covering mode, the sealing cover plate and the metal shell are used for defining a vacuum cavity, and an energy conversion structure is arranged in the vacuum cavity. Wherein the sealing cover plate comprises a dielectric layer structure and a metal layer structure, the metal layer structure forms a signal transmission structure, and the signal transmission structure is coupled with the transduction structure. And the signal transmission structure is used for inputting a radio frequency signal outside the vacuum cavity into the transduction structure, or the signal transmission structure is used for outputting the radio frequency signal processed by the transduction structure from the vacuum cavity. Therefore, the assembly of the vacuum electronic tube can be simpler, and the refinement and consistency of the vacuum electronic tube can be improved.

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 present invention relates to a multi-gap resonator and a method for designing the same. The resonator of the present invention comprises an electron beam channel, a first coupling cavity and a second coupling cavity symmetrically arranged with respect to the electron beam channel, and a plurality of gap cavities respectively communicating with the electron beam channel and the first and second coupling cavities, and at least one electric wall respectively arranged in the first and second coupling cavities, which electric wall causes at least one non-working mode of the resonator to be cut off. The method for designing the multi-gap resonator according to the present invention can reduce the non-working resonant modes and increase the mode separation; and due to the increased mode separation, it is possible to use more gap cavities to improve the characteristic impedance of the interaction mode. Thus, a multi-gap resonator with significantly improved characteristic impedance can be obtained.

A power module comprises a high frequency switching electronic power conditioner including stacked rectifier / filters, the stacked rectifier / filters generating stacked DC output voltages; and a vacuum electronic device coupled to the high frequency switching electronic power conditioner, the vacuum electronic device including components, each component receiving a respective DC output voltage of the stacked DC output voltages.

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.

The utility model discloses a klystron device and an electron accelerator, the klystron device comprises a klystron main body, a klystron collector and an electron transmission device, the electron transmission device comprises a focusing coil and an electron transmission tube, and the focusing coil of the electron transmission device is arranged at the outer side of the klystron collector; one end of the klystron collector is connected with the tail end of the klystron main body, and the other end of the klystron collector is connected with the electron transport tube; the electron transport tube is connected with the front end of an accelerating tube in the electron accelerator; a waveguide is arranged at the tail end of the klystron main body, the waveguide is connected with the front end of the accelerating tube, and electrons are accelerated by a microwave field transmitted by the waveguide after entering the accelerating tube through the electron transmission tube. An electron gun on the top of a traditional accelerating tube is omitted, the system structure is simplified, the system cost is reduced, and meanwhile the system failure rate is reduced.

The present invention provides a focusing device, comprising: a magnetic field uniformization component, which is used to uniformize the magnetic field of the component to be focused; a first focusing component, which is used to generate a focusing magnetic field, and the first focusing component includes a first permanent magnet structure and a second permanent magnet structure, and the first permanent magnet structure is arranged outside the second permanent magnet structure; a second focusing component, which includes a third permanent magnet structure and a fourth permanent magnet structure, and the third permanent magnet structure is arranged outside the fourth permanent magnet structure; the third permanent magnet structure and the first permanent magnet structure have opposite magnetization directions, and the fourth permanent magnet structure and the second permanent magnet structure have opposite magnetization directions; a magnetic conductive component, which is arranged at both ends of the first focusing component and is used to connect the first focusing component and the second focusing component. The focusing device of the present invention solves the technical problem of the huge weight and volume of the beam focusing system in the related art.

The application discloses a K-band transit-time oscillator based on a last pre-cavity extraction structure, which comprises an inner cylinder and an anode outer cylinder sleeved outside the inner cylinder, a circular annular cavity is formed between the inner cylinder and the anode outer cylinder, the cavity comprises a first drift tube, a first modulation cavity, a second drift tube, a second modulation cavity, a third drift tube, an extraction cavity and a first coaxial output waveguide which are sequentially communicated, the output end of the anode outer cylinder is further provided with a circular annular second coaxial output waveguide, the first coaxial output waveguide and the second coaxial output waveguide are coaxially arranged, the second modulation cavity is further communicated with the second coaxial output waveguide, and the K-band transit-time oscillator is rotationally symmetrical about the central axis of the inner cylinder. The application verifies the feasibility of extracting microwave by the last pre-cavity, and realizes higher efficient output and higher power output.

The invention belongs to the technical field of high-power microwave synthesis and pulse compression, and particularly relates to a high-power microwave synthesis pulse compressor, which comprises a distributed synthesis front end, a multi-path radial synthesizer and a plasma pulse compressor which are arranged in sequence, the distributed synthesis front end comprises a plurality of groups of two-in-one high-isolation coaxial-rectangular waveguide synthesizers, rectangular waveguide transition sections and 90-degree bent waveguides which are arranged in sequence; and the input end of each two-in-one high-isolation coaxial-rectangular waveguide synthesizer is used for connecting two coaxial input ports. High-power synthesis of multi-path solid-state components can be realized efficiently with high isolation, efficient pulse compression is realized, the structure is compact, the number of synthesis paths is convenient to adjust, the power capacity is high, and the application in the high-power microwave field is met.

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.

The application discloses a radial electron beam staggered grid structure traveling wave amplifier, which comprises coaxial staggered grid leaves with different radii and made of metal at the lower side and the upper side of upper and lower metal ring shells, the lower side and the upper side of the grid leaves are staggered, and a cavity is formed between the lower side and the upper side of the grid leaves, thereby forming a slow wave structure. Electromagnetic waves are injected from the cavity between two adjacent grid leaves at the lower side of the upper metal ring shell or the upper side of the lower metal ring shell near a hot cathode through an input structure as a signal to be amplified, the electromagnetic waves are transmitted along the cavity in the coaxial staggered grid and interact with electron beams transmitted along the radial direction, thereby converting electron kinetic energy into electromagnetic wave energy, amplifying the input electromagnetic wave signal, and outputting the amplified electromagnetic waves from the lower metal ring shell or the upper metal ring shell through an output structure. The application has the characteristics of high interaction efficiency, high output power, high coupling impedance and simple structure.

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.

A power module includes a high frequency switching electronic power regulator including a stacked rectifier / filter, the stacked rectifier / filter generating a stacked DC output voltage; and vacuum electronics coupled to the high frequency switching electronic power regulator, the vacuum electronics including components, each component receiving a respective one of the stacked DC output voltages.

Embodiments of the present application relate to the technical field of vacuum tubes, and provide a vacuum tube, a radio frequency module, and a communication device. The vacuum tube comprises a metal housing and a cover plate. The cover plate covers the metal housing, the cover plate and the metal housing define a vacuum cavity, and a transduction structure is provided in the vacuum cavity. The cover plate comprises a dielectric layer structure and a metal layer structure, the metal layer structure is provided with a signal transmission structure, and the signal transmission structure is coupled to the transduction structure. The signal transmission structure is used for inputting a radio frequency signal outside the vacuum cavity into the transduction structure, or the signal transmission structure is used for outputting the radio frequency signal processed by the transduction structure from the vacuum cavity. In this way, it is easy to assemble the vacuum tube, which is beneficial to improving the accuracy and consistency of the vacuum tube.

A radio frequency system (900) for a radiation therapy machine includes a first portion containing a first gas (906a) at a first pressure, a second portion containing a second gas (906b) at a second pressure, the second gas being different from the first gas, and a component (904) between the first portion and the second portion, the component containing the first gas at the first pressure.

The present invention relates to a high-power microwave beat wave generator based on the Ka-band, which generates a P-band beat frequency. The device comprises two high-frequency structures: an external electromagnetic structure and an internal electromagnetic structure. The external electromagnetic structure includes an external cathode seat, an external cathode, an anode outer cylinder, an external cutoff neck, an external reflection cavity, an external first slow-wave structure, an external drift cavity, an external second slow-wave structure, an output waveguide, and a coil magnetic field. The internal electromagnetic structure includes an internal cathode seat, an internal cathode, an internal conductor, an internal cutoff neck, an internal modulation cavity, an internal first slow-wave structure, an internal drift cavity, and an internal second slow-wave structure. The fundamental wave of the device operates in the Ka-band, ultimately generating a beat wave with a P-band beat frequency. The device has a wide operating frequency band span and rich frequency components, making it effectively adaptable to various operating environments.

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.

A radio frequency system for a radiation therapy machine includes a first portion containing a first gas at a first pressure, a second portion containing a second gas at a second pressure, the second gas being different from the first gas, and a component between the first portion and the second portion, the component containing the first gas at the first pressure.

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.

This invention discloses an arrayed oscillator based on a klystron for high-gain frequency-locked phase-locking, belonging to the field of vacuum electronic device technology. The arrayed oscillator includes at least two extended interaction oscillators and one extended interaction klystron. The extended interaction klystron includes an input cavity, at least one intermediate cavity, and an output cavity connected in sequence. The output cavities of the extended interaction oscillators and the klystron are arranged in a linear array or ring with equal spacing. The gaps or coupling cavities of adjacent components are connected by coupling bridges, realizing the arrayed interconnection of each component. This invention combines the advantages of high gain, controllable frequency and phase of the klystron with the advantages of high power, high efficiency, and simple structure of the arrayed extended interaction oscillator, achieving frequency-locked phase-locking of the arrayed oscillator. It is applicable to single-beam and multi-beam oscillators across the entire frequency band, capable of achieving output power at the MW or even GW level, and has significant engineering significance and practical value.

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.

This klystron comprises an electron gun, a high-frequency interaction unit, a main magnet that is annularly provided around the high-frequency interaction unit, an output waveguide, an auxiliary magnet that is annularly provided at a position corresponding to the output waveguide, an output unit that takes high-frequency electric power from the output waveguide, and an output adjustment mechanism that deforms the output waveguide to thereby adjust the output of high-frequency electric power taken from the output unit. The output adjustment mechanism is provided with an engagement member that is fixed to the output waveguide, a jig insertion hole section that passes through the engagement member from the outer side of the auxiliary magnet, and a jig that is inserted into the jig insertion hole section from the outer side of the auxiliary magnet and engages with the engagement member. The distal end of the jig inserted through the jig insertion hole section from the outer side of the auxiliary magnet is engaged with the engagement member, and the engagement member is pressed or pulled, whereby the output waveguide is deformed.

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.