33 results about "Magnetic mirror" patented technology

The invention provides an orthogonal electromagnetic field confinement fusion device and a fusion method. The fusion device comprises a vacuum combustion furnace which comprises a fusion reaction chamber and an inductance tube; the central shaft is arranged in the vacuum combustion furnace in a penetrating manner, a constant potential difference is applied between the inner wall of the vacuum combustion furnace and the central shaft, and a radial polarization electric field is generated in the vacuum combustion furnace; the inductance coil is wound on the outer wall of the vacuum combustion furnace, generates an axial confinement magnetic field in the vacuum combustion furnace and generates a magnetic mirror in the fusion reaction chamber; the fusion method comprises the following steps: S1, constructing an orthogonal electromagnetic field; s2, feeding fuel; s3, radially polarizing the ion ring; s4, induction of FRC is carried out; s5, axial fusion is carried out; s6, energy recovery; the device has the effects of simplifying the nuclear fusion reaction device, reducing the cost of the nuclear fusion reaction and improving the efficiency of the nuclear fusion reaction.

The present invention provides a mirror fusion device capable of stably confining high-density plasma.　This mirror fusion device comprises a central vessel 10, a confining magnetic field configuration generation unit 20, and a plasma generation unit 30. The central vessel 10 extends in a longitudinal direction to confine plasma. The confining magnetic field configuration generation unit 20 comprises at least two coils 21, 21 disposed opposite one another and coaxially with the longitudinal direction of the central vessel 10, and generates a confining magnetic field 22 for confining the plasma between the two coils 21, 21. The plasma generation unit 30 is connected to the central vessel 10 between the two coils 21, 21 of the confining magnetic field configuration generation unit 20, and rapidly forms a high-density plasma region inside the confining magnetic field 22.

The invention discloses an imaging type optical system for a high-intensity magnetic field Fourier infrared spectrum device, which comprises a solenoid superconducting magnet tubular sample cavity for the high-intensity magnetic field Fourier infrared spectrum device, and a non-magnetic damping sleeve arranged in the solenoid superconducting magnet tubular sample cavity, a non-magnetic mirror surface gold-plated optical waveguide is arranged at the upper part in the non-magnetic damping sleeve, a Faraday optical module is arranged at the lower part in the non-magnetic damping sleeve, and an adjustable sample bearing table and a low-temperature thermometer and magnetometer assembly are arranged below the non-magnetic mirror surface gold-plated optical waveguide; the non-magnetic mirror surface gold-plated optical waveguide comprises a light-in waveguide and a light-out waveguide, and the Faraday optical module integrates a switchable reflection module and a transmission module which are respectively adapted to different strong magnetic field Fourier infrared spectrum measurement requirements. The optical efficiency of the high-intensity magnetic field Fourier infrared spectrum device is improved, the problems of high optical loss and scattering interference of a traditional device are solved, and the signal-to-noise ratio is increased.

A plasma confinement device comprising an arrangement of electromagnetic coils on the faces of a polyhedron with alternating polarity. Each coil is connected to a coil of opposing polarity via a lobe comprising a loop of more electromagnetic coils. The lobe coils connect the field lines such that the entire configuration has only closed field lines. The coils of each lobe are graded in size, such that the field lines converge to their densest at the apex of the lobe. In the central region plasma is confined by magnetic mirror reflection from the converging field lines in the lobes and stabilised by the convexity of the field lines between coils. The device may form the basis of a magnetically confined thermonuclear fusion reactor.

The invention discloses a fusion ignition system based on a compact ring magnetic cone pulse compression technology, and belongs to the technical field of nuclear fusion energy. According to the system, high-speed and high-density compact ring plasma is generated through a symmetrical coaxial gun and injected into a vacuum chamber, cascade theta pinch is triggered by a single-turn ring array, the angular current and the magnetic field of a compact ring are enhanced, a moving magnetic mirror structure is formed by combining a superconducting steady-state magnetic cone, inclination instability is restrained, and the compact ring is pushed to a central collision area. After the compact rings on the two sides are collided and fused, the central magnetic mirror holding coil assembly provides slow theta pinch to maintain fusion conditions, and the plasma density gt is achieved; 1023 / m < 3 > and the ion temperature gt; 15 keV, and energy constraint time gt; and the Lawson criterion is met. The system can be switched to a magnetizing target fusion mode, and axial compression and magnetic reconnection fusion are carried out by impacting a magnetizing target through a secondary compact ring. The power generation module adopts cladding and electromagnetic induction dual-mode energy recovery. The technology has the advantages of compact structure, low cost, convenience in maintenance and the like, and provides a new way for commercial fusion power generation.

The invention belongs to the field of spaceflight plasma electric propulsion, and relates to a microwave magnetic control plasma thruster and a working method thereof. A permanent magnet is arranged on the outer side of a discharge chamber of the thruster, and the permanent magnet is arranged close to one side of a spray pipe; the permanent magnet is composed of a plurality of same strip-shaped magnet units, the strip-shaped magnet units are evenly distributed in the circumferential direction of the outer wall of the discharge chamber, and each strip-shaped magnet unit is formed by regularly arranging a plurality of permanent magnets; the permanent magnet forms a multiplexing magnetic field in the discharge chamber, and the multiplexing magnetic field is composed of an embedded magnetic mirror, an envelope magnetic mirror, a magnetic trap and a magnetic spray pipe; the plurality of embedded magnetic mirrors cling to the wall surface of the discharge chamber and are tightly arranged along the axial direction, and the outer sides of the embedded magnetic mirrors are surrounded and coated by the enveloping magnetic mirror to form a multi-magnetic mirror structure; the magnetic trap is arranged at the downstream of the multiple magnetic mirror structure; the magnetic nozzle is located downstream of the magnetic trap. A plurality of tightly arranged embedded magnetic mirrors exist in the magnetic field configuration, the exterior of the embedded magnetic mirrors is surrounded by the enveloping magnetic mirror, the axial and radial restraining capacity of the plasma is enhanced through magnetic field distribution, and the thrust performance is remarkably improved.

The application discloses a kind of conic cavity electric charge traction collision centrifugal mirror nuclear fusion device, including pressure-bearing cavity (1), gas inlet system (2), gas outlet system (3), main magnetic mirror confinement system (4) and main pulse driving system (5);The pressure-bearing cavity includes the collision cavity in the middle, and the conic cavity is separately arranged at the axial both ends of the end face of collision cavity;The conic cavity and collision cavity are jointly defined by confinement interface, the shrink end of conic cavity is towards the center of pressure-bearing cavity, and the shrink end is provided with spout, and the spout of both ends of conic cavity is oppositely arranged;Conic cavity and collision cavity are sealed and connected, and they jointly form integrated pressure-bearing cavity, and form the spiral flow working cavity that is interconnected in the inside;The gas inlet system injects fusion working substance into the spiral flow working cavity and forms one-way annular centrifugal spiral flow layer, so that the cavity is formed with near-wall high-pressure area and low-pressure cavity area in radial direction.The device has the characteristics of simplified structure, low cost, good stability and high confinement efficiency.

A nuclear fusion reactor includes a first confinement element having axial ends, which define an inner region configured to have a first plasma population disposed therein and produces an axial magnetic field between the axial ends, the axial magnetic field configured to confine the first plasma population in the radial direction, and generate a magnetic mirror effect to confine the first plasma population in an axial direction at axial ends. Second and third confinement elements are disposed outside the first confinement element proximate to corresponding axial ends, and have a second and third plasma population disposed therein, respectively. The second and third plasma populations generate electrostatic barriers at the corresponding axial ends, to form a tandem mirror further confining the first plasma population in the inner region along the axial direction.

The invention discloses a biphase magnetic mirror offset frequency laser gyroscope system, and belongs to the technical field of precise laser gyroscopes. The two gyroscopes are arranged in parallel, each gyroscope comprises a gyroscope cavity and an alternating-current phototube assembly which is arranged on the gyroscope cavity and used for outputting demodulation, and the alternating-current phototube assemblies output two A / B signals with the phase difference of 90 degrees; two magnetic mirror offset frequency assemblies; the double-phase magnetic field control circuit is used for controlling the two magnetic mirror offset frequency assemblies to generate an orthogonally changing magnetic field so as to generate an offset frequency effect on light; and the signal demodulation systems are respectively used for receiving four paths of A / B signals from the two alternating-current photoelectric tube assemblies, respectively acquiring steering pulse signals of the two gyroscopes according to the A / B signals, and eliminating a lock region by crosswise splicing the steering pulse signals. According to the invention, the problems of test precision and the like of multiple types of laser gyroscopes are solved, the negative influence of the lock region on the laser gyroscope is reduced, and the accuracy and sensitivity of the laser gyroscope are improved.

A magnetic mirror dipole field fusion device comprises an excitation ring and two magnetic compression superconductors; and the magnetic compression superconductors are arranged at north and south poles of a dipole field, and a rotating shaft of the magnetic compression superconductor is coaxial with the excitation ring. A cross section of an excitation ring made of a normal temperature material is a circle or a square, and an excitation ring made of a superconducting material is a cylinder. A gap between the excitation ring and the magnetic compression superconductor is a magnetic mirror region, and a region outside the excitation ring is a fusion region. The magnetic mirror region has a very high magnetic field, and can reflect high-energy helium ions generated by fusion. The dipole field adopting a superconducting magnetic field compressor can cancel a levitated coil, and reduce a development difficulty and construction and operation costs.

1. Name of the Design Product: AR Magnetic Mirror. 2. Use of the Design Product: Used to cooperate with a learning tablet to perform shooting and point reading functions. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph that Best Illustrates the Design Key Points: Perspective View 1.

A transverse magnetic field configuration optical system for a high magnetic field Fourier transform infrared (HFT) spectrometer includes a tubular sample cavity containing a solenoid superconducting magnet for the HFT spectrometer, and a non-magnetic damping sleeve housed within the tubular sample cavity. The upper part of the non-magnetic damping sleeve houses a non-magnetic mirror-plated gold-coated optical waveguide, and the lower part houses a transverse magnetic field configuration optical module. The transverse magnetic field configuration optical module contains an adjustable sample support stage, which is connected to a decelerated stepper motor outside the transverse magnetic field configuration optical system. The non-magnetic mirror-plated gold-coated optical waveguide includes an input waveguide for the probe light and an output waveguide for the signal light. The transverse magnetic field configuration optical module comprises a transverse magnetic field configuration reflection module and a transverse magnetic field configuration transmission module, respectively adapted to different HFT Fourier transform infrared spectroscopy measurement requirements. This invention proposes an optical system capable of realizing transverse magnetic field configuration magnetic spectroscopy measurements.

The invention discloses a transverse magnetic field configuration optical system for a high-intensity magnetic field Fourier infrared spectrum device. The transverse magnetic field configuration optical system comprises a solenoid superconducting magnet tubular sample cavity for the high-intensity magnetic field Fourier infrared spectrum device and a non-magnetic damping sleeve arranged in the solenoid superconducting magnet tubular sample cavity. A non-magnetic mirror surface gold-plated optical waveguide is arranged on the upper portion in the non-magnetic damping sleeve, a transverse magnetic field configuration optical module is arranged on the lower portion in the non-magnetic damping sleeve, an adjustable sample bearing table is arranged in the transverse magnetic field configuration optical module, and the adjustable sample bearing table is connected with a speed reduction stepping motor outside the transverse magnetic field configuration optical system. The non-magnetic mirror surface gold-plated optical waveguide comprises a light-in waveguide for inputting probe light and a light-out waveguide for outputting signal light. The transverse magnetic field configuration optical module comprises a transverse magnetic field configuration reflection module and a transverse magnetic field configuration transmission module which are respectively adapted to different strong magnetic field Fourier infrared spectrum measurement requirements. The invention provides an optical system capable of realizing transverse magnetic field configuration magnetic spectrum measurement.

A nuclear fusion reactor includes a first confinement element having axial ends, which define an inner region configured to have a first plasma population disposed therein and produces an axial magnetic field between the axial ends, the axial magnetic field configured to confine the first plasma population in the radial direction, and generate a magnetic mirror effect to confine the first plasma population in an axial direction at axial ends. Second and third confinement elements are disposed outside the first confinement element proximate to corresponding axial ends, and have a second and third plasma population disposed therein, respectively. The second and third plasma populations generate electrostatic barriers at the corresponding axial ends, to form a tandem mirror further confining the first plasma population in the inner region along the axial direction.

The invention relates to a magnetic mirror dipole field fusion device which comprises an excitation circular ring and a magnetic field compression superconductor. The magnetic field compression superconductor is arranged on the south and north poles of the dipole field, and the rotating shaft is coaxial with the excitation ring. The section of the excitation circular ring made of the normal-temperature material is circular or square, and the section of the excitation circular ring made of the superconducting material can be cylindrical. A gap between the excitation circular ring and the magnetic field compression superconductor is a magnetic mirror area, and the outer side of the excitation circular ring is a fusion area. The magnetic field of the magnetic mirror area is very high, and high-energy helium ions generated by fusion can be reflected, so that fusion ignition is very easy to realize. The magnetic mirror area can reflect all ions, and no plasma exists on the inner side of the excitation ring, so that mechanical supporting and cooling of the excitation ring are easy to realize.

The application relates to the technical field of plasma generating devices, in particular to an atmospheric pressure magnetic mirror constraint type stable plasma generating device and a control method, which comprises a high-voltage pulse power supply and a matched radio frequency power supply, a pair of discharge electrodes, two annular neodymium-iron-boron permanent magnets and a radio frequency coil; the two annular neodymium-iron-boron permanent magnets are parallel, coaxial, same-pole and opposite; and the arrangement is N-N / S-S. The application utilizes the Lorentz force to make the plasma discharge channel through the accurate proportioning of the electric field and the magnetic field, avoids the formation of electric arc due to continuous discharge, can automatically close the plasma ball into a spherical shape through linear regulation and control of the equivalent diameter of the plasma ball by adjusting the pulse width of the high-voltage pulse, solves the problems of open plasma and irregularity of a traditional device, greatly improves the plasma constraint stability, can realize accurate physical phenomenon observation, is composed of only the high-voltage pulse power supply and the matched radio frequency power supply, the discharge electrodes and the two annular permanent magnets, has no complex parts, and the part mounting mode is simple.

A magnetic mirror machine (200) comprises a first magnet system (1) comprising a first plurality of concentrically arranged circular-loop coils (11, 12), comprising a first coil (11) arranged to carry a current in a first direction; and a second coil (12) arranged to carry a current in a second direction opposite to said first direction; and a second magnet system (2) comprising a second plurality of concentrically arranged circular-loop coils (21, 22), arranged with mirror symmetry with respect to said first magnet system relative to a symmetry plane (P) located between said first magnet system (1) and said second magnet system (2), said first magnet system (1) and said second magnet system (2) being arranged as to create an annular plasma confinement area (206) at said symmetry plane (P) with a magnetic field normal to said symmetry plane (P) at said symmetry plane (P), said magnetic mirror machine further comprising a tandem magnet system (4, 4'), comprising a first tandem coil (41) located longitudinally outside said first coil (11, 21) of one of said first magnet system (1) or said second magnet system (2) and arranged to carry a current in said second direction, and a second tandem coil (42) located longitudinally outside said second coil (12, 22) of said one of said first magnet system (1) or said second magnet system (2) and arranged to carry a current in said first direction.

The application provides an external discharge Hall thruster with a planar shearing magnetic field design, which comprises a thruster structure body, an outer ring magnet, a thruster ceramic wall, an additional anode, an outer magnet, a magnetic screen, an anode, a ceramic structure body, an inner magnet, a short insulating pad, an M2 flat washer, an M2 elastic washer, an M2 nut, a long insulating pad, an M3 flat washer, an M3 elastic washer and an M3 nut. The application increases permanent magnets outside the additional anode to form a new magnetic mirror field to confine electrons, reduces the current of the additional anode, adjusts the magnetic field near the surface of the anode to make the positive gradient magnetic field on the surface of the anode, weakens the bombardment and heating of the electrons during the operation of the anode, improves the heating of the thruster and the demagnetization of the permanent magnet, increases the insulation between the anode and the additional anode, and improves the service life and reliability of the thruster.

The utility model relates to an adjustable magnetic lens bracket, which comprises a base and a lens mounting frame, the base comprises a supporting part and a mounting part, and the lens mounting frame is mounted on the mounting part of the base; the lens is mounted in the lens mounting frame; an adjustable fine thread bolt is arranged on the mounting part of the base, and the head of the adjustable fine thread bolt abuts against the lens mounting frame; the first surface of the lens mounting frame and the second surface of the mounting part are both provided with magnets, and the first surface and the second surface are attracted through the magnets. Compared with the prior art, the utility model has the advantages of simple structure and small volume, can be embedded into the limited space in a precise optical instrument and the like, does not influence the layout of other modules, and is especially suitable for scientific research imaging equipment or industrial optical path systems with high precision, high integration and compact structure.

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.

1. The name of this design product: Golf putting practice device (magnetic mirror). 2. Purpose of this design product: This design product is used for golf putting practice. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

A magnetic mirror machine (200) comprises a first magnet system (1) comprising a first plurality of concentrically arranged circular-loop coils (11, 12), comprising a first coil (11) arranged to carry a current in a first direction; and a second coil (12) arranged to carry a current in a second direction opposite to said first direction; and a second magnet system (2) comprising a second plurality of concentrically arranged circular-loop coils (21, 22), arranged with mirror symmetry with respect to said first magnet system relative to a symmetry plane (P) located between said first magnet system (1) and said second magnet system (2), said first magnet system (1) and said second magnet system (2) being arranged as to create an annular plasma confinement area (206) at said symmetry plane (P) with a magnetic field normal to said symmetry plane (P) at said symmetry plane (P), said magnetic mirror machine further comprising a tandem magnet system (4, 4'), comprising a first tandem coil (41) located longitudinally outside said first coil (11, 21) of one of said first magnet system (1) or said second magnet system (2) and arranged to carry a current in said first direction, and a second tandem coil (42) located longitudinally outside said second coil (12, 22) of said one of said first magnet system (1) or said second magnet system (2) and arranged to carry a current in said second direction.

The utility model relates to the technical field of ion source auxiliary coating, in particular to a novel durable anode ion source which comprises a base, an anode is arranged on the base, a cooling structure matched with the anode is arranged on the base, an electricity leading part is arranged on the cooling structure, and the cooling structure is externally connected with a power supply device through the electricity leading part. An inner cathode and an outer cathode are arranged on the base, a gas distribution structure is further arranged on the base, the gas distribution structure is externally connected with a gas supply device, magnetic steel is arranged on the outer wall of the supporting part, and the magnetic mirror ratio of a discharge cavity magnetic field formed by the inner cathode, the outer cathode and the anode is high. According to the technical scheme, electrons can be effectively gathered at the open end of a discharge cavity formed by the inner cathode, the outer cathode and the anode, namely in an ion emitting channel, so that collision of ions on the side walls of the inner cathode and the outer cathode is effectively reduced, sputtering pollution is reduced, and powder and cut pollutants generated in the using process cannot be accumulated on the outer cathode and the anode.

The magnetic mirror device (200) comprises a first inner coil (104) arranged to conduct current in a first direction, and a second inner coil (105) axially offset from the first inner coil (104) and arranged to conduct current in a second direction opposite the first direction. The mirror device (200) further comprises a first outer coil (210) positioned radially outward of the first inner coil (104) and arranged to conduct current in the second direction, and a second outer coil (212) positioned radially outward of the second inner coil (105) and arranged to conduct current in the first direction.

The invention provides a magnetic plasma electric propulsion jet secondary pinch magnetic mirror field adjusting mechanism. The device is composed of an integrated mounting bottom plate, a displacement mechanism, a displacement mechanism base, a moving platform, a driving piece, a rolling bearing, a bearing fixing pin, a secondary driving sliding groove, a permanent magnet fixing tool assembly, a rectangular permanent magnet, a permanent magnet fixing plate, a permanent magnet positioning clamp, a driven piece, a primary driven sliding groove, a rotating shaft and a hinge base. According to the device, a driving piece is dragged through a displacement mechanism, so that a permanent magnet fixing tool assembly provided with a driven piece is driven, the driving process is divided into two stages of driving a first-stage driven sliding groove through a first-stage driving rod and driving a second-stage driven rod through a second-stage driving sliding groove, and the two stages of the first stage are connected. Therefore, the 0-90-degree inclination angle of the permanent magnet fixing tool assembly can be controlled by a 100mm-stroke small displacement mechanism, and the expansion and contraction degree of a magnetic plasma electric propulsion jet secondary pinch magnetic mirror field can be adjusted to the maximum extent.

A magnetic confinement system includes a magnetic mirror device that includes a chamber to hold a target plasma and a coil arrangement to generate a magnetic field configuration in the chamber to confine the target plasma in cylindrically-symmetric form in the chamber, the magnetic field configuration having open ends. The magnetic confinement system further includes plasma guns to generate plasma pistons and project the plasma pistons at the open ends of the magnetic field configuration. In operation, the plasma pistons converge towards each other to close the open ends of the magnetic field configuration and to compress and heat the target plasma.

This invention provides an active electron microscope demagnetization method, apparatus, and system based on FFT harmonic suppression feedback. The method includes the following steps: acquiring real-time time-domain signals of interfering magnetic fields along the X, Y, and Z axes to obtain three-axis discrete-time sequences; performing Fast Fourier Transform (FFT) on each of the three-axis discrete-time sequences to convert the signals from the time domain to the frequency domain, obtaining three-axis frequency-domain signals; decomposing the corresponding time-domain signals into at least six harmonic components based on the three-axis frequency-domain signals, and extracting the amplitude and phase parameters of each harmonic component; generating a compensation signal with the same amplitude but opposite direction to the interfering magnetic field based on the amplitude and phase parameters of each harmonic component; and determining the driving current required to drive the three-axis coils through a constant current source based on the compensation signal, so as to generate a dynamic compensation magnetic field with the same amplitude but opposite direction to the spatial magnetic field in real time. This invention enables real-time acquisition, frequency-domain analysis, and precise cancellation of environmental magnetic fields.

A magnetic mirror machine (200), the magnetic mirror machine comprising: a first inner coil (104) arranged to carry an electric current in a first direction; and a second inner coil (105) offset from the first inner coil (104) in the axial direction and arranged to carry a current in a second direction opposite the first direction. The magnetic mirror machine (200) further comprises: a first outer coil (210) located radially outward of the first inner coil (104) and arranged to carry a current in the second direction; and a second outer coil (212) located radially outward of the second inner coil (105) and arranged to carry a current in the first direction.

The application provides a solenoid bundle confinement model and a charged particle beam current compression method, and relates to the technical field of charged particle beam current compression of accelerators. The model comprises a main solenoid assembly for forming a uniform magnetic field inside the solenoid; an introduction assembly for sequentially introducing a plurality of charged particle beam bundles into the uniform magnetic field, so that the charged particle beam bundles spiral move; a confinement zone assembly which is similar to a magnetic mirror structure and confines the sequentially incident charged particle beams to reciprocally spiral move in the confinement zone until the average flow intensity of the beam in the confinement zone reaches a preset value; and an extraction assembly for extracting the charged particle beam with the average flow intensity reaching the preset value from the confinement model. The application makes the charged particle beam reciprocally move in the confinement zone, thereby doubling the number of beam bundles and the average current in the confinement model, and solves the problems of large volume, high cost of the charged particle beam current compression device and the fact that the average current of the compressed beam can only reach the order of mA.

The present invention belongs to the field of space electric propulsion in aerospace propulsion technology, and relates to a magnetic array structure suitable for a micro-microwave ion thruster, which is composed of multiple Halbach-type permanent magnet strips; the multiple Halbach-type permanent magnet strips are arranged in a circular ring shape, and the magnetic field enhancement of each Halbach magnetic strip points to the center of the distribution circle where the ring is located. Under the condition of the same magnet volume, the magnetic field intensity of the magnetic mirror area can be enhanced, and efficient ionization can be maintained while ensuring electron confinement, thereby improving energy utilization efficiency; the present invention forms a magnetic field gradient through a specific arrangement of Halbach permanent magnet strips, and can use the magnetic field gradient drift to induce plasma migration toward the gate, increase the plasma density in front of the gate, and thus increase the current density of the thruster. The present invention maintains efficient confinement of electrons and maintains a high electron energy acquisition efficiency by rationally designing the magnetic field structure; guides the plasma to migrate toward the gate, and increases the extracted ion current.