29results about "Transit-time tubes" patented technology

The invention provides a one-dimensional array multi-channel periodic permanent magnet focusing system and a design method thereof. The one-dimensional array multi-channel periodic permanent magnet focusing system comprises pole shoes and magnetic groups which are arranged at intervals along a first direction, the pole shoes and the magnetic groups are periodically and alternately arranged along a first direction to form a plurality of periodic permanent magnet structures; the magnetic group comprises two pieces of first magnetic steel which are arranged at intervals along a second direction; the first magnetic steel and the pole shoe extend along a third direction; a plurality of through holes which are arranged at intervals in the third direction are formed in the pole shoe, and the through holes are used for assembling a slow wave structure; a plurality of through holes form a through hole unit; the two pieces of first magnetic steel are located on the two sides of the through hole unit in the second direction respectively. The magnetic group further comprises two pieces of second magnetic steel arranged between the two pieces of first magnetic steel; the two pieces of second magnetic steel are located on the two sides of the through hole unit in the third direction respectively. A plurality of amplification channels are integrated in one set of magnetic focusing system, and the focusing performance of the magnetic focusing system on electron beams is not influenced.

The invention provides a shielding structure of a plasma source, a design method of the shielding structure and plasma processing equipment, and relates to the technical field of electromagnetic shielding, the plasma source comprises a solenoid, the shielding structure comprises a shielding body surrounding the solenoid, and the shielding body is provided with at least one shielding channel designed based on the cut-off waveguide theory. The method is used for suppressing electromagnetic leakage on the premise of ensuring physical communication. The shielding channel comprises a ventilating window which is arranged on the side surface of the shielding body and is used for radiating, a circular waveguide tube which is used for a pipeline to pass through and is connected with an external hose fixing piece and is provided with a thread, and a segmentable waveguide tube which is used for a growth sample cavity to pass through. By constructing a shielding body, a solenoid in a plasma source is shielded in all directions; by reasonably designing the size and layout of the waveguide structure, efficient suppression of radio frequency energy is realized, the failure of the sensor caused by electromagnetic interference is solved, and stable operation of plasma processing equipment is guaranteed.

To provide an electron gun, a vacuum device and a method of activating a getter capable of suppressing the constitution of the vacuum device from becoming complex even in the case where a non-evaporation type getter having a heater built in is provided.SOLUTION: An electron gun comprises: a cathode; a heater for heating the cathode; a getter which is electrically connected to the heater; and a switch circuit which are electrically connected to the heater and the getter, and switches between electric supply to the heater and electric supply to the getter.SELECTED DRAWING: Figure 1

A magnet array holder configured to retain magnet pieces and / or non-magnet pieces to form a magnet array, the magnet array configured to manipulate one or more electron beams in a vacuum electronic device when assembled, the magnet array holder comprising a set of slots configured to receive magnet and / or non-magnet pieces; a set of pockets to receive magnet and / or non-magnet pieces; and one or more attachment interfaces configured to couple the magnet array holder to a vacuum electronic device.

To provide a setting device of an industrial magnetron capable of generating a stable plasma state even when changing from a low output to a rated output of a high output while reducing the cost of the whole device by using a single magnetron, and a setting method of the industrial magnetron.SOLUTION: A setting device 1 for an industrial magnetron includes a control unit 30 that sets an initial value of a voltage value using a sample product of an industrial magnetron 10 and sets a current value so that an output value of the industrial magnetron 10 becomes a rated output, and a storage unit 40 that stores the voltage value and the current value set by the control unit 30.SELECTED DRAWING: Figure 1

A magnetic system capable of creating electron minibeams includes a first dipole, a second dipole, a third dipole, a fourth dipole, and a quadrupole. The first dipole defines a first central aperture, the second dipole defines a second central aperture, the third dipole defines a third central aperture, the fourth dipole defines a fourth central aperture, and the quadrupole defines a quadrupole aperture. The first central aperture, the second central aperture, the third central aperture, and the fourth central aperture are coaxially aligned to define a dipole axis. The first dipole, the second dipole, the third dipole, and the fourth dipole are rotatable about the dipole axis and translatable along the dipole axis relative to each other. The quadrupole is selectively spinnable about a quadrupole axis defined by the quadrupole aperture.

The invention belongs to the technical field of electric vacuum devices, and discloses a compact gyrotron terahertz source device based on a pulsed high-intensity magnetic field, which comprises a power supply part and a gyrotron body, the gyrotron body is provided with a cathode used for generating electron beams and a resonant cavity serving as an electron beam channel, and the peripheral wall of the outer side of the electron beam channel of the gyrotron body serves as an anode. A coil unit for generating a pulsed magnetic field is distributed on the outer side peripheral wall of the electron beam channel of the gyrotron body; the coil unit comprises a continuous electric conductor which is spirally wound for multiple circles along the peripheral side of the gyrotron body; according to the invention, the coil unit and the gyrotron body are connected in series in the same circuit, so that the current generated by the same power supply flows through the coil unit and the gyrotron body in sequence, and the problems of complex structure, poor synchronous control precision and large energy loss of a conventional dual-power-supply power supply system are effectively solved. And the working reliability and the energy utilization efficiency of the terahertz source device are improved.

A magnet array holder configured to retain magnet pieces and / or non-magnet pieces to form a magnet array, the magnet array configured to manipulate one or more electron beams in a vacuum electronic device when assembled, the magnet array holder comprising a set of slots configured to receive magnet and / or non-magnet pieces; a set of pockets to receive magnet and / or non-magnet pieces; and one or more attachment interfaces configured to couple the magnet array holder to a vacuum electronic device.

The application belongs to the technical field of electric vacuum devices, and discloses a compact gyrotron terahertz source device based on a pulsed strong magnetic field, which comprises a power supply unit and a gyrotron tube body; a cathode for generating an electron beam and a resonant cavity serving as an electron beam channel are arranged on the gyrotron tube body, and the outer side circumferential wall of the electron beam channel of the gyrotron tube body serves as an anode; a coil unit for generating a pulsed magnetic field is arranged on the outer side circumferential wall of the electron beam channel of the gyrotron tube body; the coil unit comprises a continuous electric conductor, and the electric conductor is helically wound around the gyrotron tube body for multiple turns; the coil unit and the gyrotron tube body are connected in series in the same circuit, so that the current generated by the same power supply sequentially flows through the coil unit and the gyrotron tube body, thereby effectively solving the problems of complex structure, poor synchronous control precision and large energy loss of the conventional double-power-supply system, and improving the working reliability and energy utilization efficiency of the terahertz source device.

To provide a magnetic circuit device, an optical device, and an electron beam device capable of generating a uniform axisymmetric magnetic field.SOLUTION: The magnetic circuit device includes a magnet disposed along a predetermined axis, and a magnetic member covering an outer periphery of the magnet, wherein the magnet is magnetized in a radial direction about the axis, and a ratio between a magnet magnetic path length of the magnet and a gap space magnetic path length of a gap space excluding the magnet and the magnetic member is set to a constant value on a closed magnetic path of magnetic lines of force by the magnet.SELECTED DRAWING: Figure 1

The invention discloses a microwave oven magnetron frequency conversion method based on a vibration metal sheet, and belongs to the technical field of microwaves. According to the invention, the metal sheet is arranged in the resonant cavity of the magnetron, and the metal sheet generates random tiny vibration along with the mechanical vibration of the metal sheet during the operation of the microwave oven, so that the random change of the working frequency of the magnetron is realized. The random vibration continuously perturbates the electromagnetic field distribution of the magnetron, so that the working frequency of the magnetron changes randomly and quickly in a small range. The natural broadening of the frequency spectrum is equivalent to the dynamic stirring of an electromagnetic field mode in the furnace chamber, so that the original fixed standing waves are effectively scattered, and the energy distribution tends to be more uniform. Finally, on the premise of not adding any additional active control part and obvious cost, the heating uniformity of the microwave oven is greatly improved, the pain point troubling the industry for a long time is solved, and a technical foundation is laid for popularization of the next-generation high-performance microwave oven.

The application provides a pole shoe and a periodic permanent magnet focusing system. The pole shoe comprises a through hole penetrating through the surfaces of both sides of the pole shoe along the pole shoe axis, a pole shoe head surrounding the edge of the through hole, and a pole shoe ring surface surrounding the outside of the pole shoe head. The through hole, the pole shoe head and the pole shoe ring surface are coaxially arranged. The through hole comprises a centrally arranged assembly slot in a rectangular structure for assembling a slow wave structure. The assembly slot comprises two opposite first edge portions in a first direction and two opposite second edge portions in a second direction. The through hole further comprises two first notches respectively extending outward from the two opposite first edge portions of the assembly slot and two second notches respectively extending outward from the two opposite second edge portions of the assembly slot. The pole shoe can improve the shape of the inner hole of the pole shoe in the focusing system, improve the utilization rate of the inner hole cross section, and further improve the strength of the focusing magnetic field.

The application provides a shielding structure of a plasma source and a design method thereof and a plasma processing device, and relates to the technical field of electromagnetic shielding. The plasma source comprises a solenoid, and the shielding structure comprises a shielding body surrounding the solenoid. At least one shielding channel based on the cutoff waveguide theory is arranged on the shielding body, and is used for inhibiting electromagnetic leakage under the premise of ensuring physical communication. The shielding channel comprises a ventilation window arranged on the side surface of the shielding body and used for heat dissipation, a threaded circular waveguide tube used for allowing a pipeline to pass through and connected with an external hose fixing member, and a segmented waveguide tube used for allowing a growth sample cavity to pass through. The solenoid in the plasma source is shielded in all directions by constructing the shielding body. By reasonably designing the size and layout of the waveguide structure, efficient inhibition of radio frequency energy is realized, the failure of a sensor caused by electromagnetic interference is solved, and the stable operation of the plasma processing device is ensured.

The application provides a gyrotron steady-state operation stage automatic identification method, and belongs to the field of electron cyclotron resonance heating systems. Control signals and power waveforms of single discharge of a gyrotron are read, and a search range of a steady-state stage is positioned on the power waveforms based on control signal parameters. In the search range, sliding window scanning is performed, the relative standard deviation of power in each sliding window is calculated, and sliding windows with a relative standard deviation less than a threshold value are marked as stable windows. At least N one continuous stable window is identified as a continuous stable section, N a set number, and a continuous stable section with a total steady-state duration longer than a set duration is identified as a steady-state section. A steady-state section with the longest total steady-state duration is identified as a gyrotron steady-state operation stage. The application also provides a gyrotron steady-state operation stage automatic identification system and a gyrotron power prediction method. The problems of high cost, low efficiency and poor universality of a gyrotron steady-state identification method are solved.

The invention discloses a large-rotation magnetic control injection type electron gun which comprises a shell, a magnet assembly arranged on the outer circumferential face of the shell in a sleeving mode, a cathode assembly and an anode, wherein the cathode assembly and the anode are arranged in the shell. The cathode assembly comprises a first cathode, a second cathode and a third cathode which are coaxially nested from inside to outside; the first cathode and the shell are coaxially arranged, the first cathode comprises a first step surface, a second step surface and a transition inclined surface connecting the first step surface and the second step surface, and the second step surface is located on the side, close to the anode, of the first step surface; the surface of one side, close to the anode, of the second cathode is an emission surface, and the emission surface is an inclined surface formed by recessing in the direction away from the anode; the anode and the first cathode are coaxially arranged, the anode is an annular cylinder, and an electron beam channel for an electron beam to pass through is formed in the center of the anode; the end faces of the sides, close to each other, of the third cathode and the anode are both of a multi-face combined structure.

The application provides a multi-channel pole shoe, a multi-channel periodic permanent magnet focusing system and a design method. The multi-channel pole shoe comprises a pole shoe head and a pole shoe ring surface surrounding the outside of the pole shoe head, and the pole shoe head and the pole shoe ring surface are coaxially arranged. A plurality of pole shoe through holes are formed on the pole shoe head and arranged along the circumference of the pole shoe head. The pole shoe through hole comprises an assembly channel in a rectangular structure for assembling a slow wave structure and two grooves respectively outwardly extending from two opposite edge sides of the assembly channel along the radial direction of the pole shoe head. The extension direction of the assembly channel is perpendicular to the extension direction of the groove. In the extension direction of the assembly channel, the length of the assembly channel is greater than the length of the groove. The multi-channel pole shoe can improve the axial magnetic field strength on the channel axis and reduce the angular magnetic field strength, thereby effectively improving the confinement ability of the magnetic focusing system to the electron beam.

The invention relates to a tube comprising at least one end with an oblique cross-section, in which said end, having an oblique plane cross-section not perpendicular to the central axis of the tube, has a constant thickness. Figure for the abstract: [Fig.1]

The invention provides an automatic identification method for a steady-state operation stage of a gyrotron, and belongs to the field of electron cyclotron resonance heating systems, and the method comprises the steps: reading a control signal and a power waveform of single discharge of the gyrotron, and positioning a search range of the steady-state stage on the power waveform based on a control signal parameter; sliding window scanning is carried out in the search range, the relative standard deviation of power in each sliding window is calculated, and the sliding windows with the relative standard deviation smaller than a threshold value are marked as stable windows; at least N continuous stable windows are recognized as continuous stable sections, N is a set number, the continuous stable sections with the total steady-state duration exceeding the set duration are recognized as steady-state sections, and the steady-state section with the longest total steady-state duration is recognized as a gyrotron steady-state operation stage; the invention also provides a gyrotron steady-state operation stage automatic identification system and a gyrotron power prediction method. The problems that a gyrotron steady state identification method is high in cost, low in efficiency and poor in universality are solved.

The invention discloses a preparation method of a high-quality microwave generation O-shaped device, and solves the technical problem that the waveform quality and the service life of microwaves generated by an O-shaped device prepared in the prior art are affected due to the existence of medium substances such as mechanical damage and pollutants on the surface of the O-shaped device. The method comprises the following steps: determining parameters of an O-type device according to design requirements and processing the O-type device; preparing a small sample; cleaning the small sample by adopting M0 cleaning processes, and selecting M cleaning processes with the cleaning effect reaching the standard; a plurality of split type O-shaped devices (split parts) for testing are machined, M cleaning processes are adopted for cleaning, P cleaning processes meeting cleaning indexes are obtained, and P is smaller than M; a plurality of split type O-shaped devices (integrated structures) for testing are machined, cleaning and assembly testing are conducted through P cleaning processes, the optimal cleaning process of each short section is found out, the optimal cleaning scheme of the O-shaped devices is obtained, and finally the finished O-shaped devices are obtained.

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.

This invention provides a one-dimensional array multi-channel periodic permanent magnet focusing system and its design method. The system includes pole shoes and magnetic groups spaced apart along a first direction. The pole shoes and magnetic groups are periodically alternated along the first direction to form multiple periodic permanent magnet structures. Each magnetic group includes two first magnets spaced apart along a second direction. Both the first magnets and the pole shoes extend along a third direction. The pole shoes have several through holes spaced apart along the third direction for mounting slow-wave structures. These through holes constitute a through-hole unit. The two first magnets are located on opposite sides of the through-hole unit along the second direction. The magnetic group also includes two second magnets disposed between the two first magnets. The two second magnets are located on opposite sides of the through-hole unit along the third direction. This system integrates multiple amplification channels within a single magnetic focusing system without affecting the focusing performance of the electron beam.

Provided is an electromagnetic wave generation device with which it is possible to determine the cause of an abnormality occurring in the interior thereof.　The present invention comprises: a negative electrode (1); a first positive electrode (2) which is disposed facing the negative electrode and through which electrons can pass; a cylindrical waveguide (3) that is disposed on the side of the first positive electrode opposite from the negative electrode and guides electromagnetic waves; an output window (30) that is disposed at the end portion of the waveguide on the side opposite from the first positive electrode and outputs electromagnetic waves; a first current sensor (41) that detects current data pertaining to an electron beam emitted from the negative electrode; a second current sensor (42) that detects current data pertaining to the electron beam traveling within the waveguide; and an abnormality determination device (60) that determines an internal abnormality on the basis of the current data detected by the first current sensor and the current data detected by the second current sensor.

This invention provides a one-dimensional array multi-channel periodic permanent magnet focusing system and its design method. The one-dimensional array multi-channel periodic permanent magnet focusing system includes pole shoes and magnetic groups spaced apart along a first direction; the pole shoes and magnetic groups are periodically alternately arranged along the first direction to form multiple periodic permanent magnet structures; the magnetic group includes two magnets arranged along a second direction; both the magnets and the pole shoes extend along a third direction; the pole shoes have a plurality of through holes spaced apart along the third direction, the through holes being used to assemble slow-wave structures; the adjacent sides of the two magnets are the inner sides, and the magnets have a plurality of grid grooves spaced apart along the third direction; the grid grooves are formed by the inner sidewall of the magnet being recessed inward and the grid grooves penetrate the magnets along the first direction; the grid grooves on the two magnets correspond one-to-one, each through hole is located between two corresponding grid grooves, and the two corresponding grid grooves enclose a channel for the slow-wave structure to pass through; the channel and the through hole are coaxially arranged.

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.

A magnet array holder configured to retain magnet pieces and / or non-magnet pieces to form a magnet array, the magnet array configured to manipulate one or more electron beams in a vacuum electronic device when assembled, the magnet array holder comprising a set of slots configured to receive magnet and / or non-magnet pieces; a set of pockets to receive magnet and / or non-magnet pieces; and one or more attachment interfaces configured to couple the magnet array holder to a vacuum electronic device.

To provide a klystron capable of specifying a factor of failure.SOLUTION: A klystron comprises: a negative electrode generating an electron; a pipe container having an input cavity, a middle cavity, and an output cavity; an output part that is connected to the output cavity; an output window that is provided to the output part; a corrector that captures the electron; an inlet that cools at least one of the output window, the pipe container, and the corrector, and fetches a coolant to one end; a cooling pipe having a discharge outlet discharging a coolant to the other end; a sensor that detects a temperature of the coolant in the cooling pipe, a light amount of an inner part of the pipe container, or a detection value indicating a pressure in an inner part of the pipe container; and a storage part that stores the detection value.SELECTED DRAWING: Figure 1

The invention provides a one-dimensional array multi-channel periodic permanent magnet focusing system and a design method thereof. The one-dimensional array multi-channel periodic permanent magnet focusing system comprises pole shoes and magnetic groups which are arranged at intervals along a first direction, the pole shoes and the magnetic groups are periodically and alternately arranged along a first direction to form a plurality of periodic permanent magnet structures; the magnetic group comprises two pieces of magnetic steel arranged along a second direction; the magnetic steel and the pole shoe extend along a third direction. A plurality of through holes which are arranged at intervals in the third direction are formed in the pole shoe, and the through holes are used for assembling a slow wave structure; the adjacent sides of the two pieces of magnetic steel are inner sides, and a plurality of grid grooves which are arranged at intervals in the third direction are formed in the magnetic steel. The inner side wall surface of the magnetic steel is recessed inwards to form the gate groove, and the gate groove penetrates through the magnetic steel along a first direction. The grid grooves in the two pieces of magnetic steel are in one-to-one correspondence, each through hole is located between the two correspondingly arranged grid grooves, and the two correspondingly arranged grid grooves enclose to form a channel for the slow wave structure to pass through; and the channel and the through hole are coaxially arranged.

The invention provides a coaxial integrated permanent magnet focusing system, which comprises a cathode base, a shell, a first permanent magnet group and a second permanent magnet group, and is characterized in that the shell is connected with the cathode base through an insulating connecting piece; the first permanent magnet group is arranged in the cathode base, the second permanent magnet group is arranged in the shell, and the first permanent magnet group is fixedly connected with the second permanent magnet group through the insulating connecting piece to form a permanent magnet focusing system together, so that the built-in integrated layout is realized, and the problems that a traditional focusing system is huge in weight and size and poor in focusing effect are solved. The technical problem that a large number of space positions and power consumption are needed for providing a focusing magnetic field is solved, high compactness and miniaturization of the system structure are achieved, the size and weight of the focusing system are greatly reduced, the optimized magnet arrangement can generate the focusing magnetic field with high peak value and high uniformity in an electron beam transmission area, and the focusing effect is good. The rigidity and the flow rate of the beam are effectively improved, and the impedance of the device is remarkably improved.

Provided is an electromagnetic wave generation device capable of determining the cause of an abnormality that has occurred internally.　The present invention includes: a negative electrode (1); a first positive electrode (2) that is disposed facing the negative electrode and through which electrons can pass; a cylindrical waveguide (3) that guides electromagnetic waves and is disposed on the opposite side of the first positive electrode from the negative electrode; an output window (30) that outputs electromagnetic waves and is disposed at the opposite end of the waveguide to the first positive electrode; a first current sensor (41) that detects current data of electron beams emitted from the negative electrode; a second current sensor (42) that detects current data of electron beams traveling in the waveguide; and an abnormality determination device (60) that determines an internal abnormality on the basis of the current data detected by the first current sensor and the current data detected by the second current sensor.