31 results about "Plasma channel" patented technology

A plasma generation system for generating a multilayer plasma includes a plasma generator that includes an inner electrode, an intermediate electrode surrounding the inner electrode and defining therebetween an inner plasma channel having an inner plasma outlet, and an outer electrode surrounding the intermediate electrode and defining therebetween an outer plasma channel having an outer plasma outlet; a process gas unit configured to provide a first and a second process gas inside the inner and outer plasma channels, respectively; and a power supply unit configured to energize the first process gas into a first plasma that flows along the inner plasma channel and out through the inner plasma outlet as an inner layer of the multilayer plasma, and to energize the second process gas into a second plasma that flows along the outer plasma channel and out through the outer plasma outlet as an outer layer of the multilayer plasma.

The present invention provides a method and system for determining the physical properties of arc discharge plasma in transformer oil, relating to the field of data processing technology. The implementation scheme comprises: performing a power-frequency arc discharge on the transformer oil to determine the initial particle concentration of each element when a plasma channel is formed in the transformer oil, and collecting the radiation light from the power-frequency arc discharge; performing spectral analysis on the radiation light, and determining the particle type, heavy particle temperature, electron temperature, and excited-state temperature of the plasma in the transformer oil based on the spectral analysis results; iteratively correcting the initial particle concentration of each element based on the particle type, heavy particle temperature, electron temperature, and excited-state temperature of the plasma in the transformer oil to obtain a target particle concentration for each element; and determining the physical properties of the plasma in the transformer oil based on the target particle concentration for each element. This method can accurately describe the physical properties of the plasma in the transformer oil.

A lightning arresting device comprises a lightning arresting piece capable of leading lightning and a laser generator, the laser generator can generate laser for ionizing air to form a plasma channel, an opening is formed in the lightning arresting piece, and the laser penetrates through the opening in the induction direction and is emitted out of the lightning arresting piece, so that the lightning is led to the lightning arresting piece in the induction direction.

A plasma focus system for aneutronic fusion is disclosed that includes an electrode assembly having an inner electrode extending along a pinch axis from a discharge end to a focus end, and an outer electrode surrounding the inner electrode to define a plasma channel for receiving a process gas containing aneutronic fusion fuel. The system also includes a power supply unit for applying a discharge driving signal to the electrodes, which causes the gas to be ionized into a plasma current sheath at the discharge end that flows along the plasma channel to reach the focus end where the sheath collapses toward the pinch axis to form a plasma pinch. The inner electrode has a tapered tip at the focus end that is configured to increase a speed of the sheath sufficiently to reach a pinch temperature high enough for the fuel to undergo aneutronic fusion reactions within the pinch.

An extraction chamber includes a main channel, a plasma channel, and a plurality of side channels fluidly connecting the main channel to the plasma channel. Each of the plurality of side channels has an average diameter of at most 200 μm at a narrowest cross section, and the extraction chamber has a separation efficiency of at least 95%. A multilevel extraction chamber, includes a main channel, a secondary channel fluidly connected to the main channel, a plasma channel fluidly connected to the secondary channel, a first set of a plurality of side channels fluidly connecting the main channel to the secondary channel, and a second set of a plurality of side channels fluidly connecting the secondary channel to the plasma channel. Each of the first set of side channels has an average diameter that is greater than the average diameter of each of the second set of side channels, and the extraction chamber has a separation efficiency of at least 95%.

A plasma nuclear fusion reactor comprises a reactor, a plasma channel is arranged in the reactor, an inlet of the plasma channel is communicated with an outlet of an electromagnetic acceleration channel of a plasma electromagnetic acceleration device, the inner end of the plasma channel is communicated with a plasma nuclear fusion chamber, and the inner wall of the plasma nuclear fusion chamber is an arc-shaped surface; the plasma electromagnetic acceleration device comprises a machine shell, a positive excitation conductor and a negative excitation conductor are arranged in the machine shell in parallel, the positive excitation conductor is connected with a positive pole of an excitation power supply, the negative excitation conductor is connected with a negative pole of the excitation power supply, and an electromagnetic acceleration channel capable of being vacuumized is arranged between the positive excitation conductor and the negative excitation conductor. The invention aims to provide the plasma nuclear fusion reactor which can rapidly accelerate plasmas, enables the plasmas to move at a high speed and have huge kinetic energy, and further enables the plasmas to enter the plasma nuclear fusion chamber and generate a nuclear fusion reaction.

The application discloses a sustained combustion type plasma nuclear fusion chamber. The chamber comprises a shell, a plasma channel is arranged in the shell, the plasma channel is a tapered pipeline from an inlet end to an outlet end, the inlet of the plasma channel is communicated with the outlet of an electromagnetic acceleration channel of a plasma electromagnetic acceleration device, the inner end of the plasma channel is communicated with a plasma nuclear fusion cavity, the inner wall of the plasma nuclear fusion cavity is an arc surface, a nuclear fusion sustained combustion cavity is arranged on the inner wall of the plasma nuclear fusion cavity, and the nuclear fusion sustained combustion cavity is filled with nuclear fusion fuel. The sustained combustion type plasma nuclear fusion chamber can make plasma enter the plasma nuclear fusion chamber and generate primary nuclear fusion, and the primary nuclear fusion can transmit heat to the nuclear fusion fuel in the nuclear fusion sustained combustion cavity, thereby triggering secondary nuclear fusion.

The utility model relates to vacuum coating equipment technical field especially is concerned about a kind of device of high-frequency oscillation auxiliary magnetron sputtering preparation DLC film, including vacuum sputtering cavity, vacuum system and gas delivery system, the vacuum system and gas delivery system are communicated with the inner chamber of vacuum sputtering cavity respectively, the inside of vacuum sputtering cavity is equipped with magnetron sputtering assembly, high-frequency oscillation auxiliary assembly and substrate turret assembly, plasma channel is formed between the magnetron sputtering assembly and substrate turret assembly, the high-frequency oscillation auxiliary assembly includes oscillation coil and the high-frequency oscillation power supply of oscillation coil electrical connection, the oscillation coil is set to the region corresponding plasma channel in vacuum sputtering cavity inside, the utility model breaks through the ionization limit of traditional magnetic field by introducing high-frequency oscillation field to strengthen the collision excitation of electron and particle, provides feasible path for preparing high-performance DLC film, and its technical research and development and application have important significance to break through industry bottleneck.

A semiconductor processing system is provided. The system may have: a processing chamber defining an interior volume; a foreline in fluid connection with the internal volume and configured to receive process gas from the internal volume, the foreline having a foreline network and a foreline outlet conduit downstream of the foreline network; a throttle valve within the foreline outlet conduit, including a movable gate having an orifice, and configured to control gas flow through the foreline; and a gas injector in the foreline network and configured to direct a buffer gas into a conduit of the foreline network. The system may have a remote plasma source interface fluidly connected to the foreline outlet conduit, downstream of the interior volume, and having a plasma channel configured to direct a remote plasma flow into the foreline outlet conduit.

The invention provides a space propulsion method of a nanosecond-femtosecond composite light filament, which is used for solving the problem of low long-distance laser propulsion efficiency. The method specifically comprises the following steps: forming a kilometer-level length filament through a space filament forming principle of femtosecond laser, stabilizing the power density at 1013-1015W / cm < 2 > magnitude by utilizing a light intensity clamping effect, and realizing dozens of kilometer-level low-loss energy transmission; meanwhile, the transmission direction of the nanosecond laser is adjusted through the optical lens group, the formed nanosecond filament and the femtosecond laser are coaxially transmitted or transmitted at a certain angle and act on the same position, a plasma channel generated by the filament enables the transmission loss of the high-energy nanosecond laser to be greatly reduced, and the energy absorption of the target material to the nanosecond laser is remarkably improved; therefore, the surface of the target material is melted, gasified and even ionized in an extremely short time, a large number of high-speed reverse-spraying plasma plumes are generated, and high specific impulse and thrust are obtained. The method is suitable for various target materials, and precise control over the thrust, the specific impulse and the propelling direction can be achieved by regulating and controlling laser parameters.

A kind of synchronous timing control system for strong laser plasma interaction experiment, including a femtosecond laser device, a square wave signal generator, a jet signal synchronizer, three delay timers, a 12-way signal synchronizer, two shutter controllers, a YAG laser, a jet controller, multiple experimental acquisition instruments including an electron spectrometer, a rear imaging CCD, a spectrometer CCD.The present application is mainly applied to the field of strong laser plasma interaction, which can accurately control the interaction time of femtosecond laser pulse and nanosecond gate plasma channel, and accurately control the start acquisition time and acquisition duration of various experimental data, improve the signal-to-noise ratio, and the whole timing system is very easy to adjust.The present application also has strong expansibility, when ionized gas is not needed to form plasma channel, the 1Hz pulse signal timing of the right half of the dashed line can be removed, so that the interaction time of femtosecond laser pulse and millisecond gate jet gas can be accurately controlled.The expansibility of the present application is also reflected in that enough output ports have been reserved, and suitable functional elements can be connected subsequently.

The invention relates to thermal effect simulation in electrical discharge machining, in particular to a simulation method for a temperature field and a thermal stress field in electrical discharge machining. The method comprises the steps of collecting data through discharge machining experiment parameters, analyzing a single pulse discharge waveform, carrying out material microstructure characterization through a scanning electron microscope and an electron back scattering diffraction technology, establishing a physical model comprising an electrode, a workpiece and a plasma channel, carrying out model simplification, and setting a heat conduction model and a heat source model. Electric and magnetic field boundary conditions and heat conduction and fluid heat transfer conditions of a discharge channel are set, thermodynamic coupling analysis is carried out in ABAQUS software, the distribution condition of a transient heat effect and a stress field in discharge machining is simulated, numerical solution is carried out in combination with experimental data, and therefore the change condition of the temperature of the surface of a workpiece and the change condition of the thermal stress field in the machining process are obtained. Through the method, the distribution of thermal stress can be accurately predicted, and a theoretical basis is provided for optimizing a processing technology and reducing generation of microcracks.

The invention discloses a discharge rock breaking structure for rock mass presplitting joint forming and a using method thereof. The discharging rock breaking structure comprises a discharging assembly, a supporting assembly and a spraying assembly. The discharge assembly comprises two discharge columns with opposite polarities, the opposite sides of the two discharge columns are connected with discharge needles, and the pre-crack is arranged between the two discharge columns; a storage cavity used for storing fluid and supporting particles is formed in the storage bag, and a preset nozzle is formed in the position, opposite to the spray point, of the storage bag. During discharging, a plasma channel is generated in the rock mass between the spray points which are correspondingly arranged, the plasma channel expands to enable the rock mass to be pulled and damaged, and directional cracks are formed between the adjacent drill holes; when the discharging assembly discharges, fluid and supporting particles are continuously injected into the storage bag through the water pump, the fluid and the supporting particles in the storage bag are forced to enter the pre-crack from the preset nozzle, the supporting particles enter the pre-crack, the upper side and the lower side of the pre-crack are supported, and the crack is prevented from being closed due to ground stress.

A beam accelerator system comprises an ion accelerator that generates a high-energy ion beam, a low-pressure chamber, an anode adjacent and fluidly connected to the low-pressure chamber, a plasma window adjacent and fluidly connected to the anode, and a cathode housing block adjacent and fluidly connected to the plasma window. The plasma window comprises a plurality of cooling plates, each cooling plate comprising an aperture that is aligned with an aperture in one or more adjacent cooling plate to form a plasma channel. The cathode housing block comprises a cathode target region and a cooling portion. The cooling portion comprises a fluid inlet, a fluid outlet, a cooling channel fluidly coupling the fluid inlet and the fluid outlet, and an opening adjacent to the plasma window and aligned with a longitudinal axis of the plasma channel.

The present invention provides an arc plasma generator, which relates to the technical field of plasma generators. The arc plasma generator provided by the present invention includes a cathode, an insulating support assembly, an intermediate member, an air inlet member, an insulating member, and an anode; the cathode is connected to the top of the insulating support assembly; the intermediate member, the air inlet member, the insulating member, and the anode are clamped on the insulating support assembly from top to bottom. The intermediate member has a first plasma channel, the cathode penetrates through the top of the insulating support assembly and extends into the first plasma channel, and the anode has a second plasma channel that communicates with the first plasma channel through the air inlet member and the insulating member. The air inlet member is used to distribute the protective gas into the second plasma channel and form a spiral protective gas on the surface of the second plasma channel. The above-mentioned arc plasma generator can increase the arc voltage and reduce the arc current, can confine the plasma jet and improve the characteristics of the plasma in the arc root attachment area, stabilize the arc and inhibit electrode ablation.

The present invention discloses a plasma atherosclerotic plaque ablation catheter, which belongs to the field of plasma technology. The plasma atherosclerotic plaque ablation catheter comprises: a catheter body, which comprises an expansion balloon; a plasma generator, which is arranged outside the expansion balloon and has a plasma channel, wherein outlets of the plasma channel are all arranged toward the plaque; a material delivery channel, which is connected to the plasma generator and is used to deliver water or plasma-activated hydrogel to the plasma generator; and a microelectrode device, which is arranged in the plasma generator and is connected to a high-voltage power supply via a wire. The microelectrode device ionizes water or plasma-activated hydrogel to generate reactive oxygen species, which flow toward the plaque through the plasma channel. The reactive oxygen species excited by the plasma perform early plaque ablation.

The invention discloses an underwater pulse discharge plasma channel time-varying resistance prediction method based on a PINN, and belongs to the technical field of calculation. The method comprises the following steps: firstly, collecting discharge experiment data under various initial conditions, and performing preprocessing according to model training requirements; and secondly, a PINN neural network is constructed according to the requirement of an underwater pulse discharge actual task, a discharge equivalent loop and the Kirchhoff's law are combined to improve a PINN loss function, and the PINN loss function is made to be suitable for prediction of the plasma channel time-varying resistance. Thirdly, minimizing a loss function, optimizing model parameters, and training a PINN neural network to find optimal parameters; and finally, a corresponding time-varying resistance value can be obtained by inputting underwater pulse discharge time data. According to the method, the physical law and the neural network are combined for predicting the time-varying resistance of the underwater pulse discharge plasma channel for the first time, and the mapping relation of the time-varying resistance can be effectively constructed by combining physical information and the neural network.

This invention discloses an energy control method for high-energy electrohydraulic detonation, belonging to the field of pulse power technology. It includes: control of the electrical and chemical energy of a metal wire, utilizing the high amplitude component of a composite pulse power to rapidly deposit electrical energy into the metal wire and completely release its chemical energy; control of plasma channel deposition energy, adjusting the channel deposition energy and external radiated heat through the long pulse width component of the composite pulse power, enabling the metal powder to react with the liquid medium and release energy; control of metal powder release energy, adjusting the reaction rate between the metal powder and the liquid medium to achieve self-sustaining reaction and improve the energy release efficiency of the metal powder; and control of shock wave energy, adjusting the composite pulse power, metal wire size, and metal powder parameters to improve the conversion efficiency of the deposited energy into shock wave energy, meeting application requirements. This invention achieves precise energy control during electrohydraulic detonation through the matching of multiple stages.

An extraction chamber includes a main channel, a plasma channel, and a plurality of side channels fluidly connecting the main channel to the plasma channel. Each of the plurality of side channels has an average diameter of at most 200 μm at a narrowest cross section, and the extraction chamber has a separation efficiency of at least 95%. A multilevel extraction chamber, includes a main channel, a secondary channel fluidly connected to the main channel, a plasma channel fluidly connected to the secondary channel, a first set of a plurality of side channels fluidly connecting the main channel to the secondary channel, and a second set of a plurality of side channels fluidly connecting the secondary channel to the plasma channel. Each of the first set of side channels has an average diameter that is greater than the average diameter of each of the second set of side channels, and the extraction chamber has a separation efficiency of at least 95%.

The invention provides a front feeding PEALD coating system, and relates to the technical field of semiconductor equipment. Comprising a process chamber assembly, and a plasma assembly, an air inlet assembly and a vacuum assembly which are connected to the process chamber assembly, and the process chamber assembly at least comprises two process chambers; plasma channels are arranged on the back sides of the two process chambers so as to be connected with the plasma assembly; feeding openings are formed in the front sides of the two process chambers, side sliding door assemblies are arranged at the feeding openings, and the side sliding door assemblies are configured to be capable of closing or opening the two process chambers through transverse movement; a first air passage and a second air passage which are respectively used for communicating the two process cavities are symmetrically formed in the cavity door main body, and the first air passage and the second air passage are communicated to the vacuum assembly so as to exhaust air from the two process cavities at the same time. According to the scheme, the equipment depth volume can be reduced, and the reaction uniformity is improved.

The invention relates to the technical field of novel light sources, and particularly discloses a plasma-metal oxide coupling-based light emitting method, which comprises the following steps of S1, selecting a metal oxide as a light emitting carrier; s2, constructing a discharge device comprising a high-voltage electrode, a grounding electrode, a light-emitting carrier, a direct-current adjustable power supply, a current-limiting resistor and a wire; s3, placing the metal oxide on the surface of a cathode and applying a direct-current voltage to form a plasma channel; and S4, realizing dynamic matching of the plasma excitation intensity and the carrier concentration of the metal oxide based on voltage regulation and control, and obtaining controllable light-emitting output. The method has the beneficial effects that a plasma channel is established on the surface of the metal oxide through direct-current discharge, dynamic regulation and control of a carrier recombination process are realized through voltage regulation under the synergistic effect of high-energy electron bombardment and a heat effect of plasmas, and the luminous efficiency and the light intensity stability are remarkably improved; and a brand new technical direction is provided for the development of high-brightness and low-energy-consumption solid-state light sources.

This disclosure relates to a coating apparatus and a coating system. The coating apparatus includes a cavity, an evaporation unit, and an ionization unit. Both the evaporation unit and the ionization unit are disposed within the cavity. The ionization unit includes a cathode terminal, an anode terminal, and an arc power source, wherein the anode of the arc power source is coupled to the anode terminal, and the cathode of the arc power source is coupled to the cathode terminal. The ionization unit is configured to form a plasma channel between the active surface of the anode terminal and the cathode terminal, the plasma channel passing through the radiation region of the evaporation unit; and the anode terminal includes an anode cover plate configured to expose a portion of the active surface.

The invention discloses an anode surface material etching simulation method based on a plasma discharge channel, and belongs to the field of thermal plasma simulation modeling. The problems that existing material etching simulation depends on a hypothetical heat source, the influence of the transient evolution process of a plasma channel on material etching cannot be fully considered, and the simulation prediction precision is low are solved. By considering multi-physical field coupling and a transient process, high-precision key data of anode surface pressure distribution and heat flux density distribution can be provided, errors caused by a traditional assumed heat source model are overcome, and the corrosion removal process of an anode surface material is accurately simulated. The simulation result not only can accurately reflect the anode surface temperature field distribution, but also can predict the geometric contour, diameter and depth of the anode surface pit in detail. The method is mainly applied to material etching simulation of the plasma discharge channel.

The application provides an open magnetic plasma thermoelectric conversion and kinetic energy conversion regulation device, which is composed of a magnetic plasma channel, a front-stage regulation coil, a plasma probe group, a magnet array, a thermoelectric conversion channel, a magnetic shield plate, an acceleration coil and a rear-stage regulation coil. The device generates a dynamic magnetic field to transport high-temperature magnetic plasma through an excitation coil array, carries out plasma distribution regulation based on the measurement results of the plasma probe, obtains a magnetic plasma induced electromotive force by using a horizontal magnetic field and a tilted electrode, and realizes thermoelectric conversion with the magnetic plasma as a working medium. Meanwhile, the high-temperature magnetic plasma is accelerated by using a magnetic mirror structure to realize secondary conversion of the magnetic plasma heat energy, and a high-speed plasma jet flow is generated to produce a reaction thrust, thereby providing space power for a spacecraft. The application has the advantages of simple thermoelectric conversion process, no mechanical pump conveying structure and integration of the thermoelectric conversion and the space propulsion device.

The invention discloses a device for generating an orbital angular momentum-adjustable broadband terahertz vortex beam, and the device comprises a vacuum target chamber which is used for providing a vacuum environment for the interaction of laser and a substance; the laser system is used for providing driving light pulses; the gas target generation device is arranged in the vacuum target chamber, provides a plasma channel along the propagation direction of the driving light pulse, guides the driving light pulse to be transmitted in the plasma channel and generates a broadband terahertz vortex light beam; the light path adjusting element is used for adjusting the position and angle of the driving light pulse when the driving light pulse enters the plasma channel, so that the driving light pulse is transmitted in the plasma channel along a spiral linear track after entering the plasma channel, and then the transverse net current is driven on each section of the plasma channel; and broadband terahertz radiation is generated at different positions of a spiral linear track in the plasma channel, so that a broadband terahertz vortex beam with adjustable orbital angular momentum is formed. The device obtains the broadband terahertz vortex beam with the adjustable orbital angular momentum.

A plasma focus system for neutron production is disclosed that includes an electrode assembly having an inner electrode extending along a pinch axis from a discharge end to a focus end, and an outer electrode surrounding the inner electrode to define a plasma channel for receiving a gas containing neutronic fusion fuel. The system also includes a power supply unit for applying a discharge driving signal to the electrodes, which causes the gas to be ionized into a plasma current sheath at the discharge end that flows along the plasma channel to reach the focus end where the sheath collapses toward the pinch axis to form a plasma pinch that generates fusion neutrons. The inner electrode has a tapered tip at the focus end that is configured to increase a speed of the sheath sufficiently to reach a pinch temperature at which the fusion neutrons are predominantly of thermonuclear origin.

The present invention discloses a DC photoionization detection ultraviolet light source, which includes a first lamp body, a second lamp body, a first electrode and a second electrode. A plasma channel is provided at the center of the first electrode. The first electrode is arranged at the upper end of the first lamp body. The first electrode further includes an insertion end, which is arranged at one end of the first electrode close to the first lamp body, and the insertion end abuts against the inner wall of the lower end of the first lamp body. A first through hole is provided on the bottom surface of the first lamp body. One end of the plasma channel communicates with the first through hole through the insertion end. A sealing member is provided at one end of the plasma channel. The second electrode is arranged at the lower end of the first lamp body, and the second lamp body is arranged at the lower end of the second electrode. A second through hole is provided at the center of the second electrode. One end of the second through hole communicates with the first through hole, and the other end of the second through hole communicates with the second lamp body. An ultraviolet lamp window is provided at one end of the second lamp body. The present invention provides a DC photoionization detection ultraviolet light source, which reduces the generation of miscellaneous gas molecules and prolongs the service life of the ultraviolet lamp.

Embodiments relate to an electromagnetic transmitter. The transmitter includes a magnetic field generator configured to generate a uniform magnetic field in a plasma medium. The transmitter includes a plasma are generator or a plasma channel generator configured to apply a direct current voltage to a conductor within a plasma medium, wherein the plasma arc or the plasma channel rotates to generate a plasma are / channel magnetic field. The transmitter includes a magnetic flux generator configured to generate a magnetic flux in the uniform magnetic field, thereby generating a non-uniform magnetic field, wherein the non-uniform magnetic field prevents or reduces a likelihood of spiraling of the plasma arc or the plasma channel. The electromagnetic transmitter emits electromagnetic radiation in a form of the plasma arc / channel magnetic field and the complementary electric field.

The invention discloses a plasma channel generation system and method capable of controlling a transmission track, and relates to the field of femtosecond laser filamentation regulation, and the system comprises a femtosecond laser amplifier, an energy control device, a phase regulation device, a light beam zooming device, a plasma channel generation device and a computer control system which are connected in sequence. Wherein the phase regulation and control device is connected with the computer control system; generating a phase modulation light beam with a controllable transmission track according to a preset transmission track; the phase modulation light beam scaled by the light beam scaling device causes a nonlinear effect in the optical medium, and a plasma channel along a transmission track of the phase modulation light beam is generated, namely, a plasma channel with a controllable transmission track is formed; according to the invention, a plasma channel with a controllable transmission track can be realized in an optical medium.

The present invention relates to a modular cascaded thermal spray plasma gun comprising one or more cathodes, a modular neutrode stack, an anode, a gun body, an interface to a configurable nozzle and a configurable nozzle. The interface is coaxially aligned with the anode and comprises feedthroughs for cooling water. A configurable nozzle for a modular cascaded thermal spray plasma gun comprises cooling water inlet and outlets matching in form and location to corresponding feedthroughs of the interface. The configurable nozzle comprises an annular recess for coaxial alignment with an axial protrusion of an anode and a central plasma channel further comprising a transition zone for shaping the cross section of a plasma jet, a deflection zone for deflection the plasma jet and a plasma jet outlet.