# US 2026/0100290 A1 · Magnetic mirror dipole field fusion device

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- Number: US 2026/0100290 A1
- Document ID: US20260100290A1
- Status: Published application
- Kind: A1
- Application number: 18/922,259
- Filed: 2024-10-21
- Published: 2026-04-09
- Earliest claimed: 2021-09-11
- Assignees: East China University of Technology; JIANGXI LIZHEN ISOTOPE TECHNOLOGY Co., LTD
- Applicants: East China University of Technology; JIANGXI LIZHEN ISOTOPE TECHNOLOGY Co., LTD
- Inventors: Jinhai LI; Guoshu ZHANG; Bin TANG
- Web page: https://patentgrep.com/patent/US20260100290A1

## CPC

- G21B 1/05: with magnetic or electric plasma confinement
- G21B 1/17: Vacuum chambers; Vacuum systems
- Y02E 30/10: Nuclear fusion reactors
- G21B: FUSION REACTORS (uncontrolled reactors G21J)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

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.

## Claims

### Claim 1

A magnetic mirror dipole field fusion device, comprising an excitation ring and two magnetic compression superconductors, wherein the excitation ring generates a dipole magnetic field; and two magnetic compression superconductors are provided and respectively located near a south pole and a north pole of the dipole field, so that a distribution space of the dipole magnetic field in an axial direction is reduced, a magnetic induction intensity of a magnetic field in a fusion region is improved, and a magnetic mirror region is formed in a gap between the excitation ring and the magnetic compression superconductor.

### Claim 2 (depends on 1)

The magnetic mirror dipole field fusion device according to claim 1, wherein the excitation ring is symmetrical about a rotating shaft, and a cross section of the excitation ring is a circle, a square and a rectangle; and long sides of the rectangle are parallel to the rotating shaft.

### Claim 3 (depends on 1)

The magnetic mirror dipole field fusion device according to claim 1, wherein the excitation ring is an excitation ring made of a normal temperature material.

### Claim 4 (depends on 1)

The magnetic mirror dipole field fusion device according to claim 1, wherein the excitation ring is an excitation ring made of a superconducting material.

### Claim 5 (depends on 1)

The magnetic mirror dipole field fusion device according to claim 1, wherein a rotating shaft of the magnetic compression superconductor is coaxial with the rotating shaft of the excitation ring; the magnetic compression superconductors are designed symmetrically up and down; and no partition is arranged between an outer edge of the magnetic compression superconductor and the rotating shaft, and no through holes leading to magnetic field leakage are arranged.

### Claim 6 (depends on 5)

The magnetic mirror dipole field fusion device according to claim 5, wherein an axial distance between the upper and lower magnetic compression superconductors is the smallest in the magnetic mirror region, the axial distance is increased rapidly with an increase of a radius outside the magnetic mirror region, and the axial distance is no longer increased after a sufficient gap is expanded.

### Claim 7 (depends on 1)

The magnetic mirror dipole field fusion device according to claim 1, wherein the excitation ring is a superconducting excitation cylinder, and a length of the excitation cylinder is greater than 0.5 m; the magnetic compression superconductor is a disc, and a radius of the disc is greater than a gyration radius of the superconducting excitation cylinder; when an inner radius of the excitation cylinder is less than 0.5 m, the fusion region is outside the excitation cylinder; and
when the inner radius of the excitation cylinder is greater than 0.5 m, the fusion region is inside the excitation cylinder.

### Claim 8 (depends on 1)

The magnetic mirror dipole field fusion device according to claim 1, wherein the magnetic compression superconductors are bowl-shaped and symmetrical up and down.

### Claim 9 (depends on 1)

The magnetic mirror dipole field fusion device according to claim 1, wherein the excitation ring is mechanically supported, and the excitation ring is cooled by external introduction of a coolant.