12results about "Transit-time tubes" patented technology

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

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 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 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 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.

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 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.