CN114837910A - An integrated high-efficiency ionization ultra-high specific impulse radio frequency ion thruster discharge structure - Google Patents

Abstract

The invention discloses an integrated high-efficiency ionization ultra-high specific impulse radio frequency ion thruster discharge structure, comprising a screen grid, a screen grid mounting ring, a ceramic discharge chamber, a ceramic mounting ring, a coil insulating bracket, a rear casing, a gas working medium pipeline, Multiple RF coils, metal gas circuit connectors, ultra-high pressure gas circuit insulators, insulator fixing rings, and back covers. In the invention, the radio frequency coil is fixed by the coil insulating bracket, and the uniform coupling of radio frequency energy can be realized; the gas working medium channel can make the gas enter the cylindrical discharge chamber uniformly from all directions, the ionization efficiency is high, and the gas working medium channel is easy to clean. The metal gas path joint is well fixed by brazing. The ultra-high pressure gas path insulator and the metal gas path joint are connected by a ball joint, which is reliable in connection, high in connection strength, and easy to disassemble and maintain. The back cover and the insulator fixing ring are spliced. , which can not only realize the fixation of the large-volume ultra-high pressure gas path insulator, but also reduce the volume and weight of the entire thruster.

Description

An integrated high-efficiency ionization ultra-high specific impulse radio frequency ion thruster discharge structure

technical field

The invention relates to the technical field of aerospace electric propulsion, in particular to an integrated high-efficiency ionization ultra-high specific impulse radio frequency ion thruster discharge structure.

Background technique

Ultra-high specific impulse RF ion thruster is a new type of electric propulsion technology that combines dual-stage quad-grid electrostatic acceleration technology with inductive coupled discharge technology. It is suitable for technical features such as multiple working fluids. It can meet the space exploration tasks that require long-term flight, such as asteroid detection and ultra-deep space exploration. To achieve the performance of ultra-high specific impulse, it is necessary to apply a higher voltage (>8000V) to the screen grid. The existing RF ion source technology is in the aspects of ultra-high voltage insulation, gas circuit structure, discharge chamber configuration, coil fixing structure, etc. Unable to meet the application requirements of ultra-high specific impulse RF ion thrusters, it needs to be solved urgently.

SUMMARY OF THE INVENTION

Therefore, the technical problem to be solved by the present invention is to overcome the inability of the radio frequency ion source technology in the prior art to satisfy the use of ultra-high specific impulse radio frequency ion thrusters in terms of ultra-high voltage insulation, gas circuit structure, discharge chamber configuration, coil fixing structure, etc. Therefore, an integrated high-efficiency ionization ultra-high specific impulse radio frequency ion thruster discharge structure is provided.

The technical scheme of the present invention is: an integrated high-efficiency ionization ultra-high specific impulse radio frequency ion thruster discharge structure, comprising a screen grid, a screen grid mounting ring, a ceramic discharge chamber, a ceramic mounting ring, a coil insulating bracket, a rear casing, a gas engineering quality pipes, multiple radio frequency coils, metal gas line connectors, ultra-high pressure gas line insulators, insulator fixing rings, and back covers;

The rear casing is a cylindrical body with open upper and lower ends, the outer wall of the upper end of the rear casing is provided with an integrally formed annular boss 1 along the circumferential direction, and the inner wall of the lower end is provided with an integrally formed annular boss 2 along the circumferential direction;

The ceramic mounting ring is a circular ring with a central hole arranged along the axis, the ceramic mounting ring is coaxially arranged on the upper end of the rear casing, and the lower end surface of the ceramic mounting ring is fitted on the annular boss of the rear casing. end face fixed;

The ceramic discharge chamber is a cylindrical cylinder with an open upper end and a closed lower end, a vent hole is arranged in the middle of the bottom of the ceramic discharge chamber, and a ring of annular protrusions integrally formed with it is arranged on the outer wall of the ceramic discharge chamber along the circumferential direction. Stage 3, the ceramic discharge chamber is coaxially arranged in the center hole of the ceramic mounting ring, and the third lower end of the annular boss is fitted with the upper end of the ceramic mounting ring to be fixed;

The screen grid mounting ring is a flange-shaped sleeve, including a flange flange and a sleeve, the upper end of the sleeve has a circle of inward horizontal annular flanges, and the sleeve is coaxially sleeved on the annular flange. On the outer wall of the ceramic discharge chamber above the third stage, the flange protruding along the lower end face is attached to the upper end face of the annular boss three, and the horizontal annular protruding edge is pressed against the upper end face of the ceramic discharge chamber. fixed limit;

The screen grid is disc-shaped, the screen grid is coaxially arranged on the upper end of the screen grid mounting ring, and the bottom surface of the screen grid outer ring is fixedly connected with the upper end surface of the screen grid mounting ring;

The coil insulating support has a cylindrical structure, and the coil insulating support is coaxially sleeved and fixed on the outer wall of the ceramic discharge chamber below the third annular boss;

Each of the radio frequency coils is coaxially preset in the side wall of the coil insulating bracket, and two adjacent radio frequency coils are arranged at intervals;

The gas working medium pipe has a gas working medium channel opened along its length direction, the gas working medium pipe is vertically fixed at the middle position of the bottom of the ceramic discharge chamber, the upper end of the channel of the gas working medium pipe is closed, and the lower end is closed with the bottom end of the gas working medium pipe. The vent holes of the ceramic discharge chamber are sealed and communicated, and the side wall and the top wall of the gas working medium pipeline are provided with a plurality of vent holes;

The metal gas path connector is arranged at the bottom of the ceramic discharge chamber, the upper end of the metal gas path connector is fixedly connected to the bottom of the ceramic discharge chamber, and the gas path of the metal gas path connector is connected to the bottom of the ceramic discharge chamber. The vent hole is sealed and connected;

The rear cover is in the shape of a disc, and an axial annular boss is arranged on the upper surface of the rear cover along the circumferential direction. The axial annular boss is sleeved in the center hole of the second annular boss, and the The end face is fixed with the second bottom face of the annular boss, and the middle part of the rear cover is provided with an installation through hole along the axis;

The ultra-high pressure gas path insulator is vertically penetrated in the installation through hole of the rear cover, and the upper end of the ultra-high pressure gas path insulator is in sealing connection and communication with the lower end of the metal gas path joint through a ball joint;

The insulator fixing ring is a flange-shaped sleeve. The insulator fixing ring is coaxially arranged at the bottom of the back cover and is sleeved and fixed outside the ultra-high voltage gas circuit insulator. The flange end face is fixed in contact with the bottom face of the rear cover.

In the above technical solution, preferably, the materials of the ceramic discharge chamber and the gas working medium pipeline are both alumina ceramics.

In the above technical solution, preferably, the included angle between the axis of the gas outlet hole of the side wall of the gas working medium pipeline and the horizontal plane is 60°.

In the above technical solution, preferably, the upper end of the metal gas path joint is fixed to the ceramic discharge chamber by brazing.

Further, the rear cover is formed by splicing two semi-circles into a full circle, and the rear cover is provided with a first through hole and a second through hole.

Further, the splicing seam of the back cover is connected and fixed by two sets of symmetrically arranged ear plate connection structures, and each group of ear plate connection structures is composed of two ear plates that are respectively vertically fixed on the two semi-circles. The lugs are connected and fixed by bolts.

Further, the insulator fixing ring is formed by splicing two half-flanges, and the two half-flanges of the insulator fixing ring are fixed on the side wall of the middle part of the ultra-high pressure gas path insulator.

In the above technical solution, preferably, the coil insulating support and the insulator fixing ring are made of polyimide.

Further, the height of the gas working medium pipeline is consistent with the preset height of the plurality of radio frequency coils.

The technical scheme of the present invention has the following advantages:

(1) The present invention fixes the radio frequency coil through the coil insulating support, which can ensure that the spacing of the coils is fixed, so as to achieve uniform coupling of radio frequency energy; the present invention provides an integrated discharge chamber structure, and the gas working medium channel can ensure that the gas is uniform Entering the interior of the cylindrical discharge chamber from all directions can effectively improve the ionization efficiency, and at the same time, this structure is also convenient for cleaning the gas working medium channel.

(2) The metal gas path joint is connected by brazing at the bottom axis of the ceramic discharge chamber, which ensures the strength of the whole structure. Reliable, the connection method of this gas circuit insulation ensures the connection strength between the metal material and the ceramic material, and is also convenient for disassembly and maintenance.

(3) The rear cover and the insulator fixing ring are fixed by two pieces of splicing, which can not only realize the fixing of the large-volume ultra-high pressure gas circuit insulator, but also reduce the volume and weight of the entire thruster.

(4) The coil insulation bracket and the insulator fixing ring are made of polyimide material, which can provide a convenient installation method for the radio frequency coil and the ultra-high voltage gas circuit insulator while ensuring the insulation performance and high temperature resistance, so as to ensure the reliability of the connection part. sex.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

1 is a schematic cross-sectional view of Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of the installation structure of the rear cover and the insulator fixing ring according to Embodiment 1 of the present invention.

Description of reference numbers:

1-screen grid;

2-screen grid mounting ring; 21-flange flange; 22-sleeve; 23-horizontal annular flange;

3-ceramic discharge chamber; 31-vent; 32-annular boss three;

4- ceramic mounting ring;

5- Coil insulation bracket;

6-rear shell; 61-annular boss one; 62-annular boss two;

7- Gas working fluid pipeline;

8- air outlet;

9-RF coil;

10-metal gas connection;

11-Ultra high pressure gas circuit insulator;

12-insulator fixing ring; 121-split flange;

13-back cover; 131-axial annular boss; 132-installation through hole; 133-half disc; 134-ear plate;

14 - the first through hole;

15 - Second through hole.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "first" and "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Example 1:

Please refer to accompanying drawings 1-2, an integrated high-efficiency ionization ultra-high specific impulse radio frequency ion thruster discharge structure, including screen grid 1, screen grid mounting ring 2, ceramic discharge chamber 3, ceramic mounting ring 4, coil insulating bracket 5 , rear casing 6, gas working medium pipeline 7, multiple radio frequency coils 9, metal gas circuit connector 10, ultra-high pressure gas circuit insulator 11, insulator fixing ring 12, rear cover 13;

The rear casing 6 is a cylindrical body with open upper and lower ends, the outer wall of the upper end of the rear casing 6 is provided with an integrally formed annular boss 1 61 along the circumferential direction, and the inner wall of the lower end is provided with an integrally formed annular boss along the circumferential direction. two 62;

The ceramic mounting ring 4 is a circular ring with a central hole arranged along the axis, the ceramic mounting ring 4 is coaxially arranged on the upper end of the rear casing 6, and the lower end surface of the ceramic mounting ring 4 is fitted to the rear casing The upper end surface of the annular boss one 61 of 6 is fixed, and the two are fixed together by bolting by opening a plurality of screw holes in the overlapping parts of the annular boss one 61 and the mounting ring 4;

Wherein, the ceramic discharge chamber 3 is a cylindrical cylinder with an open upper end and a closed lower end, a vent hole 31 is provided in the middle of the bottom of the ceramic discharge chamber 3, and a circle is provided on the outer wall of the ceramic discharge chamber 3 along the circumferential direction. An annular boss 32 integrally formed therewith, the ceramic discharge chamber 3 is coaxially arranged in the center hole of the ceramic mounting ring 4 , and the lower end face of the annular boss 32 fits the upper end face of the ceramic mounting ring 4 . fixed;

Wherein, the screen grid mounting ring 2 is a flange-shaped sleeve, including a flange flange 21 and a sleeve 22, the upper end of the sleeve 22 has a circle of inward horizontal annular flanges 23, the sleeve 22 is the same as The shaft sleeve is arranged on the outer wall of the ceramic discharge chamber 3 above the annular boss 32, the lower end surface of the flange ledge 21 is fixed to the upper end surface of the annular boss 32, and the horizontal annular ledge 21 is fixed. 23 The lower end face is limited and fixed by pressing on the upper end face of the ceramic discharge chamber 3;

The screen grid 1 is disc-shaped, the screen grid 1 is coaxially arranged on the upper end of the screen grid mounting ring 3 , and the bottom surface of the outer ring of the screen grid 1 is attached to the upper end surface of the screen grid mounting ring 3 . together fixed connection;

Wherein, the coil insulating support 5 is a cylindrical cylinder structure, and the coil insulating support 5 is coaxially sleeved and fixed on the outer wall of the ceramic discharge chamber 3 below the annular boss 32;

Wherein, each of the radio frequency coils 9 is coaxially preset in the side wall of the coil insulating support 5, and two adjacent radio frequency coils 9 are arranged at intervals;

Wherein, the gas working medium pipe 7 has a gas working medium channel opened along its length direction, the gas working medium pipe 7 is vertically fixed at the middle position of the bottom of the ceramic discharge chamber 3, and the gas working medium pipe 7 The upper end of the channel is closed, and the lower end is in sealing communication with the vent hole 31 of the ceramic discharge chamber 3, and the side wall and the top wall of the gas working medium pipeline 7 are provided with a plurality of air outlet holes 8;

Wherein, the metal gas path joint 10 is arranged at the bottom of the ceramic discharge chamber 3 , the upper end of the metal gas path joint 10 is fixedly connected with the bottom of the ceramic discharge chamber 3 , and the gas path of the metal gas path joint 10 is It is in sealing connection and communication with the vent hole 31 at the bottom of the ceramic discharge chamber 3;

The rear cover 13 is in the shape of a disc, and an axial annular boss 131 is arranged on the rear cover 13 along the circumferential direction. The axial annular boss 131 is sleeved in the center hole of the second annular boss 62 Inside, the upper end surface of the rear cover 13 is fixed by fitting with the bottom surface of the second annular boss 62, and the middle part of the rear cover 13 is provided with an installation through hole 132 along the axis;

Wherein, the ultra-high voltage gas path insulator 11 is vertically penetrated in the installation through hole 132 of the rear cover 13 , and the upper end of the ultra-high voltage gas path insulator 11 is connected to the lower end of the metal gas path connector 10 through a ball joint. sealed connection;

The insulator fixing ring 12 is a flange-shaped sleeve, the insulator fixing ring 12 is coaxially arranged at the bottom of the rear cover 13 and is sleeved outside the ultra-high voltage gas path insulator 11 to be fixed, so The flange end surface of the insulator fixing ring 12 is fixed in contact with the bottom surface of the rear cover 13 .

In the above embodiment, the gas working medium enters the gas working medium channel through the ultra-high pressure gas circuit insulator 11 and the metal gas circuit joint 10, and is ejected through the gas outlet 8 with an included angle of 60° with the plane, and the gas working medium is uniformly charged. In the entire ceramic discharge chamber 3, the radio frequency signal feeds the energy into the ceramic discharge chamber 3 uniformly through the radio frequency coil 9. Under the action of the axial electromagnetic field, the gas working medium is ionized to generate plasma, and the screen grid 1 is loaded with high-voltage electricity ( >8000V) to generate an electrostatic field to accelerate the ions to generate thrust.

As a preferred implementation of the above embodiment, the ceramic discharge chamber 3 and the gas working medium pipeline 7 are preferably made of alumina ceramics, which can simplify the structure of the entire gas channel and ensure the reliability of the gas path connection points.

In the above embodiment, the angle between the axis of the gas outlet 8 of the side wall of the gas working medium pipeline 7 and the horizontal plane is preferably 60°, which can ensure that the gas working medium fills the entire ceramic discharge chamber 3 in a relatively short period of time, and the gas is uniform. Entering the ceramic discharge chamber 3, in the process of extracting the beam ions, it can also ensure that there is enough gas working medium in the ceramic discharge chamber 3 to ionize to generate plasma, so as to ensure that the plasma density in the ceramic discharge chamber 3 is maintained at a high level. s level.

As a preferred real-time method of the above embodiment, the upper end of the metal gas path joint 10 is fixed to the ceramic discharge chamber 3 by brazing. Since the gas working medium must pass through the ultra-high pressure gas path insulator 11 to enter the discharge chamber, However, the ultra-high pressure gas path insulator 11 used in the present invention is relatively large in volume and medium in weight, and the connecting section is made of metal material. If it is directly connected to the ceramic discharge chamber, there are problems of unreliable connection and difficult disassembly. Therefore, a piece of metal gas path joint 10 is selected to be fixed with the ceramic discharge chamber by brazing, and the ultra-high pressure gas path insulator 11 and the metal gas path joint 10 are installed with spherical joints, which not only ensures the reliable connection between dissimilar materials and easy to install and maintain.

As an improved real-time method of the above-mentioned embodiment, please refer to FIG. 2 , the back cover 13 can be formed by splicing two semi-circles 133 into a full circle, and the way of joining the two semi-circles 133 makes the back cover 13 The maintenance difficulty is greatly reduced, and the disassembly and installation are convenient. The rear cover 13 is provided with a first through hole 14 and a second through hole 15. The first through hole 14 is used for the RF coil to pass through, and the second through hole 15 is used for The high-voltage line is threaded out, which ensures the installation stability of the entire air channel and reduces the volume of the entire thruster at the same time.

In the above embodiment, please refer to FIG. 2 , the splicing seam of the back cover 13 is connected and fixed by two sets of symmetrically arranged ear plate connection structures, and each group of ear plate connection structures is vertically fixed on two semicircles by two respectively. The ear plates 134 on the plate 133 are formed, and the two ear plates 134 are connected and fixed by bolts. During the assembly process, the bolts are easily penetrated and the anti-loosening effect is good.

As an improved implementation of the above-mentioned embodiment, please refer to FIG. 2 , the insulator fixing ring 12 can be formed by splicing two half-flanges 121 . The two-half method of the insulator fixing ring 12 The flange 121 hoop is fixed on the middle side wall of the ultra-high pressure gas path insulator 11, and the two half-flanges 121 are easy to disassemble and install.

As a preferred implementation of the above embodiment, the coil insulating support 5 and the insulator fixing ring 12 are made of polyimide, the radio frequency coil 9 works under vacuum conditions, and the temperature is relatively high during the working process (generally The temperature is around 250-300°C), so the material of the coil insulating bracket needs to have a lower gas outflow rate, better insulation and heat resistance under vacuum conditions, and at the same time, the coil insulating bracket 5 also needs to have better plasticity guarantee It can be installed in the RF coil, and the selection of polyimide material can meet the design requirements.

In the above embodiment, the height of the gas working medium pipeline 7 is set to be the same as the preset height of the plurality of radio frequency coils 9, which effectively improves the ionization efficiency and realizes the uniform coupling of radio frequency energy.

Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. And the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (9)

1. The utility model provides an ultrahigh specific impulse radio frequency ion thruster discharge structure of high-efficient ionization of integral type which characterized in that includes:

the rear shell (6) is a cylindrical barrel with an opening at the upper end and an opening at the lower end, a first integrally-formed annular boss (61) is arranged on the outer wall of the upper end of the rear shell (6) along the circumferential direction, and a second integrally-formed annular boss (62) is arranged on the inner wall of the lower end of the rear shell along the circumferential direction;

the ceramic mounting ring (4) is a circular ring which is arranged along an axis and penetrates through a center hole, the ceramic mounting ring (4) is coaxially arranged at the upper end of the rear shell (6), and the lower end face of the ceramic mounting ring (4) is fixed by being attached to the upper end face of a first annular boss (61) of the rear shell (6);

the ceramic discharge chamber (3) is a cylindrical barrel with an open upper end and a closed lower end, a vent hole (31) is formed in the middle of the bottom of the ceramic discharge chamber (3), a circle of annular boss III (32) integrally formed with the ceramic discharge chamber (3) is arranged on the outer wall of the ceramic discharge chamber (3) along the circumferential direction, the ceramic discharge chamber (3) is coaxially arranged in a central hole of the ceramic mounting ring (4), and the lower end face of the annular boss III (32) is fixed by being attached to the upper end face of the ceramic mounting ring (4);

the screen grid mounting ring (2) is a flange-shaped sleeve and comprises a flange convex edge (21) and a sleeve (22), a circle of inward horizontal annular convex edge (23) is arranged at the upper end of the sleeve (22), the sleeve (22) is coaxially sleeved on the outer wall of the ceramic discharge chamber (3) above the annular boss III (32), the lower end face of the flange convex edge (21) is fixed by being attached to the upper end face of the annular boss III (32), and the lower end face of the horizontal annular convex edge (23) is fixed by being pressed on the upper end face of the ceramic discharge chamber (3) in a limiting manner;

the screen grid (1) is disc-shaped, the screen grid (1) is coaxially arranged at the upper end of the screen grid mounting ring (3), and the bottom surface of the outer ring of the screen grid (1) is attached to the upper end surface of the screen grid mounting ring (3) and fixedly connected with the same;

the coil insulation support (5) is of a cylindrical barrel structure, and the coil insulation support (5) is coaxially sleeved on the outer wall of the ceramic discharge chamber (3) below the third annular boss (32) and fixed;

the coil insulation support comprises a plurality of radio frequency coils (9), wherein each radio frequency coil (9) is coaxially preset in the side wall of the coil insulation support (5), and two adjacent radio frequency coils (9) are arranged at intervals;

the gas working medium pipeline (7) is internally provided with a gas working medium channel which is arranged along the length direction of the gas working medium pipeline (7), the gas working medium pipeline (7) is vertically fixed at the middle position of the bottom in the ceramic discharge chamber (3), the upper end of the channel of the gas working medium pipeline (7) is closed, the lower end of the channel is hermetically communicated with a vent hole (31) of the ceramic discharge chamber (3), and the side wall and the top wall of the gas working medium pipeline (7) are provided with a plurality of gas outlet holes (8);

the metal gas circuit connector (10), the metal gas circuit connector (10) is arranged at the bottom of the ceramic discharge chamber (3), the upper end of the metal gas circuit connector (10) is fixedly connected with the bottom of the ceramic discharge chamber (3), and a gas circuit channel of the metal gas circuit connector (10) is communicated with a vent hole (31) at the bottom of the ceramic discharge chamber (3) in a sealing connection manner;

the rear cover (13) is disc-shaped, an axial annular boss (131) is arranged on the upper surface of the rear cover (13) along the circumferential direction, the axial annular boss (131) is sleeved in a central hole of the second annular boss (62), the upper end surface of the rear cover (13) is fixed by being attached to the bottom surface of the second annular boss (62), and a mounting through hole (132) is arranged in the middle of the rear cover (13) along the axis;

an ultra-high pressure gas path insulator (11); the ultrahigh-pressure gas path insulator (11) vertically penetrates through an installation through hole (132) of the rear cover (13), and the upper end of the ultrahigh-pressure gas path insulator (11) is communicated with the lower end of the metal gas path joint (10) in a sealing manner through a spherical joint;

the fixed ring of insulator (12), the fixed ring of insulator (12) is flange shape sleeve, the fixed ring of insulator (12) is coaxial to be set up back lid (13) bottom and cover are established super high pressure gas circuit insulator (11) external fixation, the laminating of the flange terminal surface of the fixed ring of insulator (12) back lid (13) bottom surface is fixed.

2. The discharge structure of the integrated efficient ionization ultrahigh specific impulse radio frequency ion thruster, as recited in claim 1, wherein the ceramic discharge chamber (3) and the gas working medium pipeline (7) are made of alumina ceramic.

3. The discharge structure of the integrated efficient ionization ultrahigh specific impulse radio frequency ion thruster, as recited in claim 2, wherein an included angle between an axis of the gas outlet hole (8) in the side wall of the gas working medium pipeline (7) and a horizontal plane is 60 °.

4. The discharge structure of the integrated efficient ionization ultrahigh specific impulse radio frequency ion thruster, as recited in claim 1, wherein the upper end of the metal gas circuit joint (10) is fixed with the ceramic discharge chamber (3) by brazing.

5. The discharge structure of the integrated efficient ionization ultrahigh specific impulse radio frequency ion thruster, as recited in claim 1, wherein the rear cover (13) is formed by splicing two semicircular discs (133) into a whole circle, and the rear cover (13) is provided with a first through hole (14) and a second through hole (15).

6. The discharge structure of the integrated efficient ionization ultrahigh specific impulse radio frequency ion thruster, as recited in claim 5, wherein the splicing seams of the rear cover (13) are connected and fixed by two sets of symmetrically arranged ear plate connecting structures, each set of ear plate connecting structure is composed of two ear poles (134) respectively and vertically fixed on two semicircular discs (133), and the two ear poles (134) are connected and fixed by bolts.

7. The discharge structure of the integrated high-efficiency ionization ultrahigh specific impulse radio frequency ion thruster, as recited in claim 1, wherein the insulator fixing ring (12) is formed by splicing two half flanges (121), and the two half flanges (121) of the insulator fixing ring (12) are fixed on the side wall of the middle part of the ultrahigh pressure gas path insulator (11).

8. The discharge structure of the integrated efficient ionization ultrahigh specific impulse radio frequency ion thruster, as recited in claim 1, wherein the coil insulation support (5) and the insulator fixing ring (12) are made of polyimide.

9. The discharge structure of the integrated high-efficiency ionization ultrahigh specific impulse radio frequency ion thruster of claim 1, wherein the height of the gas working medium pipeline (7) is consistent with the preset height of the radio frequency coils (9).

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