39 results about "Solenoidal magnetic field" patented technology

The invention relates to a microwave component in the technical field of high power microwave and provides a coaxial-extraction long-pulse relativistic backward-wave oscillator. The coaxial-extraction long-pulse relativistic backward-wave oscillator comprises a cathode base, a cathode, an anode outer cylinder, a cut-off neck, a slow wave structure, a tapered waveguide, an output waveguide, a solenoidal field, a coaxial-extraction structure and a front-arranged reflection cavity. The coaxial-extraction structure is a cylinder. The front-arranged reflection cavity is disposed between the cut-off neck and the slow wave structure. According to the coaxial-extraction long-pulse relativistic backward-wave oscillator, a cylinder is adopted as the coaxial-extraction structure, and therefore the defect that the coaxial-extraction structure with a groove generates plasma is overcome, and meanwhile in the electromagnetic wave mode, function transformation can be carried out and installation can be achieved conveniently. The front-arranged reflection cavity is utilized to replace the cut-off neck so that the resonance characteristic of the front-arranged reflection cavity can be utilized to achieve the effect of the cut-off neck, electron beam scraping or electron beam bombardment of the front-arranged reflection cavity can be avoided, and premodulation of electron beams emitted from the cathode also can be carried out. Therefore, the coaxial-extraction long-pulse relativistic backward-wave oscillator is beneficial for subsequent beam wave interaction and improves power conversion efficiency of the component.

The invention discloses a dielectric filled compact type relativistic backward wave oscillator and belongs to the technical field of high-power microwave. The dielectric filled compact type relativistic backward wave oscillator is rotationally symmetrical relative to the central axis and consists of a cathode seat, a cathode, an anode outer barrel, a cut-off neck, a slow wave structure and a solenoidal field coil. The slow wave structure is a disk loaded waveguide type slow wave structure and consists of five slow wave blades, wherein the inner surface of each slow wave blade is of a rectangular structure. During dielectric filling, an original structure of the RBWO is not needed to be changed, and only dielectric materials are needed to be filled among all blades of the slow wave structure. The problem that a low-frequency relativistic backward wave oscillator is too large in size and weight can be solved, and the dielectric filled compact type relativistic backward wave oscillator has wide application prospect and important scientific research value on research of small-sized compact type relativistic backward wave oscillators, promotion of engineering application process of high-power microwave systems and expansion of the RBWO application field.

The present invention relates to a microwave source of the high-power microwave technology field, and provides a relativistic backward-wave oscillator with a collector shaped as a Chinese character chang. The relativistic backward-wave oscillator comprises a cathode base, a cathode, an anode outer cylinder, a cut-off neck, a slow wave structure, a tapered waveguide, a reflector, an output waveguide and a solenoidal magnetic field. The collector shaped as the Chinese character chang is arranged behind the tapered waveguide, a stepped reflection cavity is arranged between the cut-off neck and the slow wave structure, and double extraction cavities are also arranged between the tail end of the slow wave structure and the tapered waveguide. The relativistic backward-wave oscillator of the present invention overcomes the disadvantage that the conventional relativistic backward-wave oscillator is difficult to consider the long output microwave pulse width and the high power conversion efficiency simultaneously, solves the problem that a coaxial extraction structure is easy to generate the plasmas to thereby influence the working efficiency, and realizes the microwave output that the pulse width is greater than 100 ns, the efficiency is greater than 40%, and the power is 6 GW, on the condition of using less slow wave blades. Moreover, a high-power microwave source is compact in structure, and is easy for the repeated frequency operation.

A point projection type flood plasma source implements a magnetron sputter cold cathode electron source in a discharge cavity separated from a process chamber by a narrow conduit and a solenoid magnetic field. The solenoid magnetic field impedes radial electron flow in the nozzle and the process chamber. Process gas flows into the discharge cavity and through the nozzle to the process chamber. This gas is ionized in the nozzle and the process chamber by electrons trapped in the solenoid magnetic field. The result is a dense plasma plume in the process chamber useful for a number of applications. The source has particular advantages for reactive gas processes such as those requiring oxygen.

The invention discloses a sintering molding device and method for selective laser of a rare earth permanent magnet device and relates to the field of molding processing of rare earth permanent magnetic materials. The sintering molding device is characterized by comprising a worktable (1), a powder spreading roller (2) capable of rolling is arranged on the upper portion of the worktable (1), a powder cylinder (3) and a molding cylinder (6) are arranged on the lower portion of the worktable (1), magnetic powder is accommodated in the powder cylinder (3), the lower portion of each of the powder cylinder (3) and the molding cylinder (6) is provided with a linear lifting motor (4) capable of controlling lifting of the respective bottom plate, a laser (5) is installed on the upper portion of the molding cylinder (6) in a supported manner, the molding cylinder (6) is covered with solenoidal fields (7) on the periphery, and six steps of hierarchical discretion and the like are performed by the aid of the sintering molding method for the selective laser of the rare earth permanent magnet device including establishing a CAD (computer-aided design) geometric model. By the sintering molding device and method for the selective laser of the rare earth permanent magnet device, the rare earth permanent magnetic device with high dimensional accuracy and surface smoothness can be directly manufactured, and magnetic performance is good.

A wide aperture permanent magnet structure which is useful in creating a highly uniform longitudinal or solenoidal magnetic field in the working region of the magnet and in which the aperture of the structure can be equal in cross-sectional area to the working region of the magnet. The geometry and magnetization direction of the constituent magnets are chosen to maximize the uniformity of the longitudinal or solenoidal magnetic field in the working region of the magnet while minimizing the overall volume and weight of the structure as well as eliminating the need for magnetic pole pieces made of iron or other high permeability materials. The invention can take the form of a cylindrical shell of permanent magnets to create a solenoidal magnetic field, or a parallel surface arrangement to create a longitudinal magnetic field.

The invention relates to a solenoidal magnetic field measurement system and a using method thereof, and the solenoidal magnetic field measurement system is characterized by comprising an adjustable reference platform, an adjustable coil supporting plate, a three-dimensional translation platform, a measurement arm, an electric rotating platform, a measurement probe, a laser tracker and a controller; an adjustable coil supporting plate is arranged below the adjustable reference platform; mounting reference pieces are symmetrically arranged at the top and the bottom of the adjustable reference platform; the three-dimensional translation platform is arranged on one side of the adjustable reference platform, the top of the three-dimensional translation platform is slidably connected with one end of the measurement arm, the other end of the measurement arm is slidably connected with the electric rotating platform, the electric rotating platform is fixedly connected with the measurement probethrough a measuring rod, and the measurement probe is used for measuring an axial magnetic field and a radial magnetic field; the adjustable reference platform and the measuring rod are respectivelyprovided with a target seat, and the laser tracker is used for tracking the position of a target ball on the target seat; and the controller is connected with the three-dimensional translation platform, the electric rotating platform and the measurement probe. The system can be widely applied to the field of accelerator magnetic field measurement.

The invention relates to a coaxial transit time oscillator electron collector capable of working in a long-pulse state. The coaxial transit time oscillator electron collector is characterized in thatmagnetic induction lines on the edge of a magnetic field of a solenoid bend obliquely upwards, and an electron collection surface is of an obliquely-upward electron collector structure, so that the current density at a collection position is lowered; energy deposit is reduced; and reflected and scattered electrons are reduced. Generated plasma and secondary electrons return to a beam wave interaction area, so that microwave output is prevented from being influenced.

A pulse coupling pump comprises a pump body, a low-pressure pump, a high-pressure pump and a solenoid, wherein the low-pressure pump, the high-pressure pump and the solenoid are arranged in the pump body. The low-pressure pump comprises an armature, an armature sleeve and a rectifying valve. The high-pressure pump comprises a plunger, a sleeve, an input valve and an output valve. The high-pressure pump and the low-pressure pump are coupled through the armature, that is, the armature is located in the armature sleeve and is driven by the magnetic field force of the solenoid to move in a reciprocating manner. On one hand, a plunger pump is driven to work, and on the other hand, bidirectional pulse liquid is formed, and forms directional flowing through the rectifying valve. The armature and the armature sleeve are formed by magnetic conduction materials, a non-magnetic-conduction magnetic gap is embedded in the armature sleeve, and the front end of the armature is located nearby the magnetic gap. The input valve is located on the upstream portion of directional liquid flow, when the input valve is opened, liquid passes through the input valve from the low-pressure pump to enter the high-pressure pump and is output through the output valve, and the output flow of the liquid is decided by driving force given by the solenoid.

The Centroidal Cyclotron reveals an apparatus and method for accelerating and trapping charged particles in a solenoid magnetic field. An oscillating electric field is applied generally transverse to the magnetic field axis accelerating and trapping charged particles by their inherent cyclotron frequency at a given magnetic field of the solenoid magnetic field producing charged particle orbits with minimum canonical angular momentum orbits and gyro-phase synchrony.

The present patent letters discloses a Hall Current accelerator with a solenoid Hall field, a collimated gas source, an anode, intermediate Hall effect ionization magnetic field structures and intermediate acceleration electrodes. The Hall field in this case is the end fringe field(s) of a common solenoid magnetic field.

The invention discloses a Cerenkov microwave generator with the frequency converted between a C waveband and an X waveband. A cathode base, a cathode, an anode outer cylinder, a cut-off neck, a C-waveband slow wave structure, a drift section, an X-waveband slow wave structure and a microwave output port are arranged in a solenoid magnetic field, the whole structure is rotationally symmetrical relative to the central axis, and high beam-wave action efficiency can be achieved for the two wavebands. By designing the length and radius of the drift section, when the drift section and the front andrear slow-wave blades are distributed in a stepped mode, peak values with the optimal effect can be generated through the beam-wave effects of the two wave bands respectively.

The embodiment of the invention provides an input adjustment assembly and a solenoid magnetic field measurement experiment device including the same. The input adjustment assembly comprises an adjustment knob, a photoelectric encoder, a micro-controller and a display screen. The adjustment knob is connected with the rotation shaft of the photoelectric encoder and is capable of driving the rotationshaft of the photoelectric encoder to synchronously rotate. The micro-controller is connected with the output end of the photoelectric encoder and used for acquiring information of rotation directions, rotation angles and rotation speed of the adjustment knob according to pulse signals generated by the photoelectric encoder, and carrying out adjustment on a corresponding input object through parsing and analysis of the micro-controller. Through the input adjustment assembly including the photoelectric encoder, full digitalization of the input adjustment is achieved, so the input adjustment isquite rapid and precise. According to the invention, by use of the input adjustment assembly, fault rate of the device in use is greatly reduced; the experiment operation processes are quite convenient and simple; and good use effects are achieved.

The invention discloses a current-carrying solenoid magnetism presentation device which comprises a first solenoid, a first rail car, a second solenoid, a second rail car, a guide rail, a power supply, a first reversing switch and a second reversing switch. The first solenoid and the second solenoid are fixed to the first rail car and the second rail car respectively in the car body length directions of the first rail car and the second rail car, the first rail car and the second rail car are arranged on the horizontally-arranged smooth guide rail, the first solenoid is connected with the first reversing switch and the power supply in sequence, and the second solenoid is connected with the second reversing switch and the power supply in sequence. The current-carrying solenoid magnetism presentation device is beneficial to study of the magnetic interaction of the energized solenoids, and verification of the rule of the solenoid magnetic field.

This disclosure provides systems, methods, and apparatus for measuring flow in and around a borehole of an earth formation. A flow measurement device can include a magnet configured to generate a static solenoidal magnetic field with a field intensity that decreases in strength peripherally from the magnet, an electromagnet disposed around the magnet and configured to generate a time varying solenoidal magnetic field, and a radio frequency (RF) coil disposed around the magnet and configured to generate an RF magnetic field transverse to the static solenoidal magnetic field. The flow measurement device can calculate a flow velocity in and around the flow measurement device based upon a signal received by the RF coil.

The invention discloses a solenoid magnetic field mathematical model analysis and calculation method, and belongs to the field of mathematical model analysis and calculation methods. The method comprises the following steps: S1, building a solenoid magnetic field mathematical model, when a model is built in the S1, a sinusoidal alternating current change of a current generates a sinusoidal alternating current change magnetic field on a long straight solenoid, and the changed magnetic field also generates a changed eddy current; S2, a magnetic field distribution algorithm under the condition that no conductor exists in the solenoid is set and solved; S3, a magnetic field distribution algorithm under the condition that a conductor exists in the solenoid is set and solved; and S4, the mathematical model is analyzed after calculation to obtain a conclusion. The analysis and calculation method is more scientific and reasonable, the radial distribution of the alternating magnetic field in the long straight solenoid can be nonuniform by establishing a solenoid magnetic field mathematical model and through the analysis and calculation method, and the method is not only affected by a changing angular frequency, but also related to whether a conductor exists in the magnetic field or not.

The invention discloses a multi-solenoidal magnetic field signal separation method, device and equipment and a readable storage medium, and the method comprises the steps of: determining a total magnetic field of a target measurement point, and determining a background magnetic field of the target measurement point; determining a first solenoid superimposed magnetic field in the total magnetic field based on the total magnetic field and the background magnetic field, and determining a first solenoidal magnetic field in the first solenoid superimposed magnetic field based on the first solenoid superimposed magnetic field; based on the first solenoid superimposed magnetic field and the first solenoidal magnetic field, determining a second solenoid superimposed magnetic field corresponding to the target measurement point; and taking the second solenoid superimposed magnetic field as the first solenoid superimposed magnetic field, and performing circulating execution until each solenoidal magnetic field in the solenoid superimposed magnetic fields corresponding to the target measurement point is separated. The magnetic field signals generated by the solenoids can be separated, and a foundation is laid for the positioning process based on the multiple magnetic beacons.

The invention relates to a test system and method for applying an external magnetic field to a liquid metal battery. The test system comprises a magnetically soft alloy magnetic core, a solenoid, a magnetic field control system, a liquid metal battery test device and a heating device, the soft magnetic alloy magnetic core is arranged in the solenoid and used for improving the induction magnetic field intensity of the solenoid. The pair of solenoids are respectively arranged on the left and right sides or above and below the liquid metal battery and are used for providing a horizontal induced magnetic field or a vertical induced magnetic field; the magnetic field control system is connected with the solenoid and adjusts the induced magnetic field intensity by adjusting the current of the solenoid; the liquid metal battery testing device is used for testing electrochemical parameters of the liquid metal battery; the heating device comprises a resistance wire, a heat conduction container and a heating console; the heat conduction container is used for accommodating the liquid metal battery and uniformly conducting heat to the liquid metal battery; the resistance wire is arranged on the outer side of the heat conduction container; the heating temperature of the resistance wire is controlled through the heating console.