CN109681398B - Novel microwave ECR ion thruster discharge chamber - Google Patents
Novel microwave ECR ion thruster discharge chamber Download PDFInfo
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- CN109681398B CN109681398B CN201811518295.6A CN201811518295A CN109681398B CN 109681398 B CN109681398 B CN 109681398B CN 201811518295 A CN201811518295 A CN 201811518295A CN 109681398 B CN109681398 B CN 109681398B
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- magnetic field
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- cyclotron resonance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H—PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H1/00—Using plasma to produce a reactive propulsive thrust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H—PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03H1/00—Using plasma to produce a reactive propulsive thrust
- F03H1/0081—Electromagnetic plasma thrusters
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Plasma Technology (AREA)
Abstract
A novel microwave ECR ion thruster discharge chamber is composed of a permanent magnet magnetic field and a microwave antenna which are mutually coupled. The permanent magnet magnetic field consists of a radial magnetic field and an axial magnetic field, and a plurality of electron cyclotron resonance areas are formed so as to obviously increase the utilization rate of microwaves, greatly reduce ionization loss and improve the efficiency of the ion thruster. The microwave antenna consists of an axial loop antenna and a radial loop antenna, and the microwave is directly fed to the axial magnetic ring electron cyclotron resonance region and the radial magnetic ring electron cyclotron resonance region, so that the loss of the microwave transmitted in plasma can be effectively reduced, the coupling effect of the microwave and a magnetic field is increased, and the microwave utilization rate is effectively improved. The scheme is particularly suitable for the micro-thrust ion thruster with the thrust below 10 mN.
Description
Technical Field
A novel microwave ECR ion thruster discharge chamber belongs to the technical field of space propulsion.
Background
In recent years, the demand of various spacecrafts for ion thrusters with high specific impulse is more urgent, and the microwave ECR ion thrusters have the advantages of simple structure, reliable operation, low cost and the like, thereby being a micro-thrust ion thrustor form with great advantages.
The technology solves the problem that the ionization efficiency of the traditional microwave ion thruster is low, can obviously reduce the ionization loss, increases the extraction current and improves the efficiency of the ion thruster.
Disclosure of Invention
Aiming at the defects of the prior art, the novel microwave ECR ion thruster discharge chamber disclosed by the invention is composed of a permanent magnetic field and a microwave antenna.
The permanent magnet magnetic field consists of a radial magnetic field and an axial magnetic field, and a plurality of electron cyclotron resonance areas are formed so as to obviously increase the utilization rate of microwaves; the microwave antenna consists of an axial loop antenna and a radial loop antenna, and the microwave is directly fed to the axial magnetic ring electron cyclotron resonance region and the radial magnetic ring electron cyclotron resonance region, so that the loss of the microwave transmitted in plasma can be effectively reduced, the coupling effect of the microwave and a magnetic field is increased, and the microwave utilization rate is effectively improved.
Furthermore, the permanent magnet generates required magnetic field intensity and distribution in the thrust chamber, and a plurality of microwave electron cyclotron resonance areas are provided. An antenna designed to a specific shape and size feeds microwave power directly to the vicinity of the electron cyclotron resonance region, providing efficient ionization energy.
The permanent magnet radial permanent magnet and the axial permanent magnet are formed into an axial electron cyclotron resonance area and two radial electron cyclotron resonance areas.
The antenna is composed of an axial loop antenna and a radial loop antenna, and microwave power is fed to the radial electron cyclotron resonance region and the radial electron cyclotron resonance region respectively.
Description of the drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a working principle diagram of a discharge chamber of a novel microwave ECR ion thruster of the invention.
Detailed description of the preferred embodiments
In the figure, 1, a screen grid, 2, an insulating outer sleeve, 3, a cavity, 4, a magnetic conduction bottom plate, 5, a rear cover, 6, a screw, 7, a microwave joint, 8, a microwave joint mounting screw, 9, a microwave antenna, 10, a radial inner magnetic ring, 11, a radial outer magnetic ring, 12, an axial positioning sleeve, 13, an axial inner magnetic ring, 14, a spacer ring and 15, an axial outer magnetic ring are arranged in the figure.
According to the novel microwave ECR ion thruster discharge chamber, the magnetizing direction of the radial inner magnetic ring 10 is axial magnetizing, and the magnetic field direction is outer N and inner S; the magnetizing direction of the radial outer magnetic ring 11 is axial magnetizing, and the magnetic field direction is outer S and inner N. The magnetic field between the radially inner magnetic ring 10 and the radially outer magnetic ring 11 forms a radial electron cyclotron resonance region.
The magnetizing direction of the axial inner magnetic ring 13 is radial magnetizing, and the magnetic field direction is inner N and outer S; the magnetizing direction of the axial external magnetic ring 15 is radial magnetizing, and the magnetic field direction is inside S and outside N. The magnetic field between the axially inner magnetic ring 13 and the axially outer magnetic ring 15 forms an axial electron cyclotron resonance region.
The magnetic field between the axially inner magnetic ring 13 and the radially outer magnetic ring 11 forms a further radial electron cyclotron resonance region.
Two circular antennas with different diameters are processed on the microwave antenna 9. The front end large-diameter circular ring antenna is an axial antenna and is arranged between the axial inner magnetic ring 13 and the axial outer magnetic ring 15, and the diameter of the front end large-diameter circular ring antenna is overlapped with the axial electron cyclotron resonance area. The rear small-diameter circular antenna is a radial antenna, and the circular ring is positioned between a radial inner magnetic ring 10 and a radial outer magnetic ring 11. The radial antenna is placed in the area where the radial electron cyclotron resonance areas coincide by adjusting the axial distance between the radial antenna and the radially inner magnetic ring 10 and the radially outer magnetic ring 11.
In operation, microwaves are fed into the discharge chamber via the microwave antenna 9. The microwaves are fed partly via the radial antenna to the electron cyclotron resonance region between the radially inner magnetic ring 10 and the radially outer magnetic ring 11 and partly via the axial antenna to the electron cyclotron resonance region between the axially inner magnetic ring 13 and the axially outer magnetic ring 15. A part of the microwaves radiated outward is transmitted to an electron cyclotron resonance region between the axially inner magnetic ring 13 and the radially outer magnetic ring 11 through the plasma. High-density plasma is generated in the middle of the discharge chamber through electron cyclotron resonance, and finally ions are extracted through the screen grid 1.
The scheme utilizes three electron cyclotron resonance regions to fully absorb incident microwaves and obviously improve the utilization rate of the microwaves.
Claims (2)
1. The utility model provides a novel microwave ECR ion thruster discharge chamber which characterized by: the microwave antenna consists of two mutually coupled parts, namely a permanent magnet magnetic field and a microwave antenna;
the permanent magnet magnetic field consists of a radial magnetic field and an axial magnetic field, and a plurality of electron cyclotron resonance areas are formed so as to obviously increase the utilization rate of microwaves;
the magnetizing direction of the radial inner magnetic ring is axial magnetizing, and the magnetic field direction is outer N and inner S; the magnetizing direction of the radial outer magnetic ring is axial magnetizing, and the magnetic field direction is outer S and inner N; a radial electron cyclotron resonance region is formed by a magnetic field between the radial inner magnetic ring and the radial outer magnetic ring;
the magnetizing direction of the axial inner magnetic ring is radial magnetizing, and the magnetic field direction is inner N and outer S; the magnetizing direction of the axial external magnetic ring is radial magnetizing, and the magnetic field direction is internal S and external N; the magnetic field between the axial inner magnetic ring and the axial outer magnetic ring forms an axial electron cyclotron resonance area;
the magnetic field between the axial inner magnetic ring and the radial outer magnetic ring forms another radial electron cyclotron resonance area;
the microwave antenna consists of an axial loop antenna and a radial loop antenna, and microwaves are directly fed to an axial electron cyclotron resonance region and a radial electron cyclotron resonance region, so that the transmission loss of the microwaves in plasma is effectively reduced, the coupling effect of the microwaves and a magnetic field is increased, and the utilization rate of the microwaves is effectively improved.
2. The discharge chamber of the novel microwave ECR ion thruster as set forth in claim 1, wherein: the microwave antenna is designed into a specific shape and size, microwave power is directly fed to the vicinity of an electron cyclotron resonance region, and efficient ionization energy is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811518295.6A CN109681398B (en) | 2018-12-12 | 2018-12-12 | Novel microwave ECR ion thruster discharge chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811518295.6A CN109681398B (en) | 2018-12-12 | 2018-12-12 | Novel microwave ECR ion thruster discharge chamber |
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| Publication Number | Publication Date |
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| CN109681398A CN109681398A (en) | 2019-04-26 |
| CN109681398B true CN109681398B (en) | 2020-08-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145446B (en) * | 2019-06-13 | 2020-05-12 | 哈尔滨工业大学 | Pulse electrically-excited micro-cow propulsion device |
| CN110985323B (en) * | 2019-12-17 | 2021-01-19 | 大连理工大学 | Circular plate antenna crossed magnetic field microwave electron cyclotron resonance ion thruster |
| DE102022112292B3 (en) | 2022-05-17 | 2023-07-27 | Christian-Albrechts-Universität zu Kiel, Körperschaft des öffentlichen Rechts | MICROWAVE CYCLOTRON RESONANCE PLASMA ENGINE AND RELATED METHOD OF OPERATION AND USE |
| CN115681060B (en) * | 2023-01-03 | 2023-03-31 | 国科大杭州高等研究院 | Hall thruster, space equipment and using method of space equipment |
| CN116390320A (en) * | 2023-05-30 | 2023-07-04 | 安徽农业大学 | Electron cyclotron resonance discharge device and application |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2856740B2 (en) * | 1988-06-09 | 1999-02-10 | 株式会社東芝 | ECR type ion thruster |
| US6518705B2 (en) * | 1999-11-15 | 2003-02-11 | Lam Research Corporation | Method and apparatus for producing uniform process rates |
| ATE335928T1 (en) * | 2003-03-20 | 2006-09-15 | Elwing Llc | PROPULSION SYSTEM FOR SPACE VEHICLES |
| US7466085B2 (en) * | 2007-04-17 | 2008-12-16 | Advanced Biomarker Technologies, Llc | Cyclotron having permanent magnets |
| KR100782579B1 (en) * | 2006-09-26 | 2007-12-06 | 가부시키가이샤 나노빔 | Electron cyclotron resonance ion source |
| US8635850B1 (en) * | 2008-08-29 | 2014-01-28 | U.S. Department Of Energy | Ion electric propulsion unit |
| AU2014312406A1 (en) * | 2013-08-27 | 2016-03-17 | The Regents Of The University Of Michigan | Electrodeless plasma thruster |
| CN104653422B (en) * | 2015-01-22 | 2017-04-12 | 大连理工大学 | Three-level acceleration type spiral wave plasma propulsion device |
| CN106304595B (en) * | 2016-08-26 | 2019-02-05 | 大连理工大学 | Surface plasma body resonant vibration and electron cyclotron resonace double excitation type micro-wave thruster |
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