CN114388150A - Detachable plate type glow discharge electrode and electrode assembly - Google Patents
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- 230000004927 fusion Effects 0.000 claims abstract description 13
- 230000007704 transition Effects 0.000 claims description 25
- 238000004140 cleaning Methods 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21B—FUSION REACTORS
- G21B1/00—Thermonuclear fusion reactors
- G21B1/25—Maintenance, e.g. repair or remote inspection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/10—Nuclear fusion reactors
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Abstract
The invention belongs to the technology of fusion device discharge cleaning, and particularly relates to a detachable plate type glow discharge electrode and an electrode assembly, wherein the discharge electrode is a plate type electrode and comprises a plane a and two cambered surfaces which are positioned on the front surface, and the two cambered surfaces are respectively and symmetrically arranged above and below the plane a; the device comprises a plane b positioned on the side surface, a long rectangular plane and two small rectangular planes, wherein the long rectangular plane and the two small rectangular planes are positioned on the back surface, and the two small rectangular planes are respectively and symmetrically arranged above and below the long rectangular plane; the assembly comprises a plate electrode, an insulating connecting plate, an insulating support which is arranged on the plate electrode and penetrates through an insulating assembly positioning hole processed on the connecting plate, and an electrode support arranged on the connecting plate. The device can provide discharge cleaning for the wall of the vacuum chamber of the tokamak device, improve the uniformity of glow, avoid the occurrence of glow blind areas, ensure the convenience of processing, installation and adjustment while reducing the overall risk of the split type component, and can meet the nearness, safety and reliability of the operation parts of the large tokamak device.
Description
Technical Field
The invention belongs to the technology of fusion device discharge cleaning, and particularly relates to a detachable plate type glow discharge electrode and an electrode assembly.
Background
A good first wall condition is a necessary condition for the nuclear fusion tokamak device to acquire and operate a plasma. Glow discharge cleaning is the most mature discharge cleaning mode of tokamak, a discharge electrode is used as an anode, the wall in a vacuum chamber is used as a cathode, high-voltage breakdown gas is applied by the discharge electrode to generate plasma in the vacuum chamber, plasma ions flow to the first wall and bombard the surface of a material after being accelerated under the action of a sheath layer, and physical or chemical sputtering is carried out to remove impurity particles on the surface of the wall.
In the existing fusion experimental device, the fixed glow discharge electrode mainly adopts the structures of a cylindrical rod, a sheet, a block and the like, and the structures can generate uneven glow or blind areas of the upper and lower areas in the interior for the inner wall of a D-type vacuum chamber with larger length and width ratio in a large or future fusion reactor. In addition, most discharge electrodes adopt an integrated design of a discharge end face and a vacuum electric lead wire, wherein the connection mode is simple, the whole electrode and a penetrating window must be replaced when an insulating structure leaks or fails, and the position of the electrode cannot be adjusted in a wide range once being determined.
Disclosure of Invention
The invention aims to provide a detachable plate type glow discharge electrode and an electrode assembly, which can avoid the phenomenon of uneven glow or blind area aiming at the in-situ cleaning of the wall of a vacuum chamber of a nuclear fusion device.
The technical scheme of the invention is as follows:
the detachable plate type glow discharge electrode is a plate type electrode and comprises a plane a and two cambered surfaces, wherein the plane a and the two cambered surfaces are positioned on the front surface, and the two cambered surfaces are respectively and symmetrically arranged above and below the plane a; comprises a plane b positioned on the side surface; the device also comprises a long rectangular plane and two small rectangular planes which are positioned on the back surface, wherein the two small rectangular planes are respectively and symmetrically arranged above and below the long rectangular plane;
the middle section of the plane b is still a rectangle with equal space on both sides;
the plane a is in transition connection with the cambered surface and is bent to form a backward tilting structure with symmetrical upper and lower end surfaces; the long rectangular plane and the small rectangular planes at the upper end and the lower end are in transition connection by adopting an arc curved surface;
the top and the bottom of the plate electrode are respectively connected with the cambered surface at the upper end and the lower end and the small rectangular plane by the arc plane to form a curved surface.
The front surface and the side surface, and the side surface and the back surface of the plate electrode are connected by adopting circular arc transition curved surfaces; the connecting portions of the upper and lower edges and the outer side edges of the plane b or the connecting portions of the front surface, the back surface and the side surfaces are smoothly transited by hyperboloids.
The area facing the plasma formed by the plate electrode is (n.S)10) The number of all plate electrodes is n, and (n.S) is satisfied10) And S is greater than 1/2000, and S is the total wall area in the vacuum chamber of the nuclear fusion device.
In the plate electrode, the length A of a single cambered surface, the length B of a plane a, the width C of the plane a and the cambered surface need to meet the requirements that the A/C is more than 1/1.1 and less than 1.1/1, and the A/B is more than 1/3 and less than 1/2.
In the plate-type electrode, the long rectangular plane and the upper and lower small rectangular planes form an included angle beta, and the included angle beta is more than 125 degrees and less than 150 degrees.
In the plate electrode, the plane a and the cambered surface, the long rectangular plane and the small rectangular plane are in fillet transition connection, and the radius R satisfies 3mm < R <10 mm.
In the plate electrode, the width of the long rectangular plane and the small rectangular plane is C.
A detachable plate type glow discharge electrode assembly comprises a plate type electrode, an insulating connecting plate, an insulating support and an electrode support, wherein the insulating support is arranged on the plate type electrode and penetrates through an insulating assembly positioning hole machined in the connecting plate, and the electrode support is arranged on the connecting plate.
The two insulating supports are respectively fixed on the upper and lower plate surfaces close to the end parts of the plate electrode, the direction of the two insulating supports is vertical to the plate surfaces, and the two insulating supports are fixed through fasteners; positioning holes are processed at corresponding positions on the insulating connecting plate, the upper ends of the insulating supports respectively penetrate through the corresponding positioning holes, and a fastening piece is installed at the top of each insulating support; the electrode support has two, its position is between two insulation support, the bottom of electrode utmost point props is fixed in on the face of insulation connecting plate through the fastener, and the direction is perpendicular with the face.
The invention has the following remarkable effects: the device is suitable for in-situ cleaning of the wall of the vacuum chamber of the nuclear fusion device and provides discharge cleaning for the wall of the vacuum chamber of the tokamak device. The glow uniformity in a wider range can be realized, the occurrence of glow blind areas in the upper and lower areas in the D-type vacuum chamber with a larger length-width ratio is avoided, the processing, the installation and the adjustment are convenient and fast while the overall risk is reduced by the split type assembly, and the accessibility, the safety and the reliability of the operation part of the large-scale Tokamak device can be met. Specifically, the method comprises the following steps:
1, the end surface of the plate electrode facing to the plasma is a plane and the cambered surface is transited to an upper backward inclined structure and a lower backward inclined structure, so that the uniformity of the whole glow plasma can be effectively improved, and glow blind areas in the upper area and the lower area in a vacuum chamber can be avoided;
2, the upper end and the lower end of the plate electrode are designed and bent to form a backward inclined structure, so that electrons and ions can be effectively shielded, and the connecting ends of the sensor and the vacuum electric lead wire are protected;
3, a sensor connecting end is reserved on the lower/upper plane of the rear end of the plate electrode, so that an effective physical interface is provided for the electrode temperature and other parameter monitoring function;
4, the reserved vacuum electric lead connecting end of the upper/lower side plane at the rear end of the plate electrode provides an independent physical interface for supplying power to the electrode;
5 the insulating transition plate is rigidly connected with the vacuum chamber through an electrode support;
6 adopt the split type structure that plate electrode, insulating support, insulating connecting plate, electrode support are constituteed, realize the convenience of electrode machining, installation, change, satisfy the proximity, the security and the reliability of large-scale tokamak device operation part.
Drawings
FIG. 1 is a schematic front view of a removable plate glow discharge electrode assembly;
FIG. 2 is a schematic view of the rear of a removable plate-type glow discharge electrode assembly;
FIG. 3 is a schematic front view of a plate electrode;
FIG. 4 is a schematic view of the back side of a plate electrode;
FIG. 5 is a schematic front projection view of a plate electrode;
FIG. 6 is a schematic side view of a plate electrode;
in the figure: 1 a plate electrode; 2, insulating and supporting; 3, insulating a connecting plate; 4, supporting an electrode; 5 insulating assembly positioning holes; 6, connecting the sensor; 7 vacuum electrical lead connection; 8 fastener.
101. A plane a; 102. a plane b; 103. a cambered surface; 104. a long rectangular plane; 105. a curved surface; 106. a small rectangular plane; 107. a hyperboloid.
Detailed Description
The invention is further illustrated by the accompanying drawings and the detailed description.
As shown in fig. 1 and 2, the detachable plate type glow discharge electrode assembly includes: the device comprises a plate electrode 1, an insulating connecting plate 3, an insulating support 2 which is arranged on the plate electrode 1 and penetrates through an insulating component positioning hole 5 processed on the connecting plate 3, and an electrode support 4 arranged on the connecting plate 3;
the two insulating supports 2 are respectively fixed on the upper and lower plate surfaces close to the end parts of the plate electrode 1, the direction of the two insulating supports is vertical to the plate surfaces, the two insulating supports are fixed through a fastening piece 8, and the two insulating supports are fixed after the position is adjusted; positioning holes 5 are processed at corresponding positions on the insulating connecting plate 3, so that the upper ends of the insulating supports 2 respectively penetrate through the corresponding positioning holes 5, and a fastening piece 8 is arranged at the top of each insulating support 2 to realize fixation and locking; electrode supports 4 are used for mounting the assembly to the inner wall of the vacuum chamber.
The two electrode supports 4 are positioned between the two insulating supports 2, the bottom of each electrode support 4 is fixed on the plate surface of the insulating connecting plate 3 through a fastener 8, and the direction of each electrode support is vertical to the plate surface; the fixing and locking can be realized, and the distance between the vertical direction and the plate surface can be adjusted by utilizing the length of the electrode support 4; and a fastener 8 is arranged at the top of each electrode support 4 and is used for mounting connection and locking with a reserved structure on the inner wall of the vacuum chamber.
As shown in fig. 3, 4, 5 and 6, the shape of the plate electrode 1 is modified,
the front surface of the plate electrode 1 consists of a plane a101 and an upper cambered surface and a lower cambered surface 103, and the integral structure of the front surface of the electrode is a backward inclined structure formed by bending the plane 101 in transition connection with the cambered surface 103 and forming a symmetrical form of the upper end surface and the lower end surface; the main body of the side surface of the plate electrode 1 consists of a plane b102 and a plurality of rounded arc surfaces;
the back main body of the plate electrode 1 consists of three rectangular planes (a long rectangular plane 104 and small rectangular planes 106 at the upper end and the lower end), and circular arc curved surface transition is adopted between the planes;
the top and the bottom of the plate electrode 1 are respectively connected with the cambered surface 103 at the front and the plane 106 at the back corresponding to the upper and the lower ends of the plate electrode 1 by the arc plane to form a curved surface 105; the front surface and the side surface, and the side surface and the back surface of the plate electrode 1 are connected by adopting circular arc transition curved surfaces; in which a smooth transition is made by the hyperboloid 107 adapted to each side/surface at the connecting portion involving three sides (upper and lower sides and the outer side of the plane b 102) or three sides (front, back and side).
The structural control parameter of the plate-type electrode 1 generally refers to the area of the electrode facing to the plasma, and usually, the number of the electrodes is n, the area of the electrode facing to the plasma is (n.S) according to the structural characteristics and the spatial layout in the vacuum chamber of the nuclear fusion device10). Electrode global control parameter, i.e. electrode area (n · S)10)，
In this structure, (n.S) is satisfied10) the/S is more than 1/2000, and S is the total wall area in the vacuum chamber of the nuclear fusion device;
as shown in FIG. 5, the area of the front surface of the single electrode facing the plasma is composed of a plane a101 and two cambered surfaces 103, and the cambered surfaces 103 at the upper end and the lower end are designed symmetrically. The total area of the single electrode facing the plasma is S10I.e. the sum of the areas of one plane a101 and two curved surfaces 103, i.e. S10＝S101+S103。S103Is divided into twoSum of area of the individual curved surfaces 103, S101Is the area of the plane a 101;
as shown in FIG. 5, the total area S of the front surface of the single electrode10The main dimension control parameters of (1) are a single arc surface 103 length A, a plane a101 length B and a single arc surface 103 width C. Wherein, the length-width ratio A/C projected by the cambered surface 103 must satisfy that A/C is more than 1/1.1 and less than 1.1/1; meanwhile, the length ratio A/B of the projection of the rectangular plane a101 and the cambered surface 103 in the front view of the electrode meets 1/3 & lt A/B & lt 1/2; and the width of the rectangular plane a101 is C as same as that of the cambered surface 103.
As shown in FIG. 6, another main control parameter of the arc surface 103 is the radius α of the curved surface, wherein α is greater than 0.3B and less than 0.6B, and one end of the arc surface 103 is connected with the rectangular plane a101 for smooth transition.
The electrode back long rectangular plane 104 and the upper and lower small rectangular planes 106 form an included angle β, and 125 ° < β <150 °;
the irregular plane b102 of the side surface of the electrode is respectively transited with the plane a101 and the arc surface 103 of the front surface of the electrode, the long rectangular plane 104 and the upper and lower small rectangular planes 106 by a fillet R, and 3mm < R <10 mm. The middle section main body of the irregular plane b102 is still a rectangle with equal space on both sides;
as shown in fig. 4 and 6, the three rectangular planes (the long rectangular plane 104 and the upper and lower small rectangular planes 106) of the electrode back main body are also formed by the concave curved surface transition formed by the round corners R. Particularly, the main control parameter of the upper end and lower end curved surfaces 105 of the electrode is R, and an outer convex curved surface with the radius of R is adopted in the design to be connected with the arc surface 103 on the front surface of the electrode and the small rectangular plane 106 on the back surface of the electrode in a smooth transition mode. Four vertexes of the upper end and the lower end of the electrode are formed by hyperboloids 107, and the hyperboloids 107 are formed into a hyperboloid structural form finally according to the basic design principle of being suitable for each adjacent transition fillet R and smooth transition of the curved surface 105.
As shown in fig. 4 and 6, the widths of the three rectangular planes (the long rectangular plane 104 and the upper and lower small rectangular planes 106) of the electrode back main body are designed to be consistent with the width of the electrode front surface, i.e. the widths of the three rectangular planes are C. The length design principle of the three rectangular planes (the long rectangular plane 104 and the upper and lower small rectangular planes 106) on the back of the electrode is based on the basic principle of adapting to the curved surface 105, the concave transition curved surface formed by the round corners R and the adjacent transition round corners R, and the final design parameters of the three rectangular planes on the back are rounded.
Therefore, in the design confirmation and optimization of the actual size parameters of the plate-type electrodes, the total area S of the front surface of a single electrode is determined according to the total area S of the inner wall of a vacuum chamber of the nuclear fusion device and the number n of the electrodes10(ii) a And then based on the total area S of the single electrode10The proportional relationship of the primary dimension control parameters A, B, C, the radius of the curved surface alpha, and the angle beta determine the primary design parameters of the electrode.
The sensor connecting end 6 and the vacuum electric lead connecting end 7 are respectively arranged on two small rectangular planes 106 of the electrode back main body, so that the plate electrode 1 is independently connected with a vacuum electric lead, and the insulating connecting plate 3 plays a role of transition support, so that the insulating connecting plate and the integral support of the component are physically isolated;
when the device is installed, the electrode support 4 is fixedly connected to the inner wall of the vacuum chamber body of the Tokamak device in a welding mode; off-line installation, namely fixedly connecting the plate electrode 1 with an insulating connecting plate 3 through an insulating support 2 and adjusting the distance, and integrally installing in a vacuum chamber; in addition, the electrode support 4 can also be fixed in an online mounting mode, and the electrode support can also be fixed in a welding mode, and then the assembly and the distance adjustment can be carried out according to the sequence of the insulating connecting plate 3, the insulating support 2 and the plate electrode 1.
The electrode mounting can adopt forward mounting, namely the sensor connecting end 6 is positioned at the upper part; an inverted mounting, i.e. an upside down mounting with the vacuum electrical lead connection at the top (sensor connection 6 at the bottom) may also be used. This is favorable to rear end sensor connecting cable and the electric nimble arrangement of vacuum electrical lead wire connecting cable electricity.
In specific implementation, the reverse operations of off-line electrode installation and distance adjustment can be performed when needed, namely, the plate-type electrode 1 is replaced on line or the plane height of the plate-type electrode is adjusted.
The present invention has been described in detail with reference to the drawings and the embodiments, but the present invention is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. The prior art can be used for the content which is not described in detail in the present invention.
Claims (16)
1. Can dismantle board-like glow discharge electrode, its characterized in that: the electrode is a plate-type electrode (1) and comprises a plane a (101) and two cambered surfaces (103), wherein the plane a (101) and the two cambered surfaces (103) are positioned on the front surface, and the two cambered surfaces (103) are respectively and symmetrically arranged above and below the plane a (101); comprises a plane b (102) located on the side; the device also comprises a long rectangular plane (104) and two small rectangular planes (106) which are positioned on the back surface, wherein the two small rectangular planes (106) are respectively and symmetrically arranged above and below the long rectangular plane (104);
the middle section of the plane b (102) is still a rectangle with equal space on two sides;
the plane a (101) is in transition connection with the cambered surface (103) and is bent to form a backward tilting structure with symmetrical upper and lower end surfaces; the long rectangular plane (104) and the small rectangular planes (106) at the upper end and the lower end are in transition connection by adopting an arc curved surface;
the top and the bottom of the plate electrode (1) are respectively connected with an upper cambered surface (103) and a lower cambered surface (106) by an arc plane correspondingly to form a curved surface (105).
2. A removable plate glow discharge electrode according to claim 1 wherein: the front surface and the side surface, and the side surface and the back surface of the plate electrode (1) are connected by adopting circular arc transition curved surfaces; the connecting parts of the upper edge, the lower edge and the outer side edge of the plane b (102) or the connecting parts of the front surface, the back surface and the side surface are smoothly transited by hyperboloids (107).
3. A removable plate glow discharge electrode according to claim 1 wherein: the area facing the plasma formed by the plate electrode (1) is (n.S)10) The number of all plate electrodes (1) is n, and (n.S) is satisfied10) And S is greater than 1/2000, and S is the total wall area in the vacuum chamber of the nuclear fusion device.
4. A removable plate glow discharge electrode according to claim 3 wherein: in the plate electrode (1), the length A of a single cambered surface (103), the length B of a plane a (101), and the width C of the plane a (101) and the cambered surface (103) need to satisfy the conditions that A/C is more than 1/1.1 and less than 1.1/1 and A/B is more than 1/3 and less than 1/2.
5. A removable plate glow discharge electrode according to claim 4 wherein: in the plate-type electrode (1), the long rectangular plane (104) and the upper and lower small rectangular planes (106) form an included angle beta, and the included angle beta is more than 125 degrees and less than 150 degrees.
6. A removable plate glow discharge electrode according to claim 5 wherein: in the plate electrode (1), the plane a (101) and the arc surface (103), the long rectangular plane (104) and the small rectangular plane (106) are in fillet transition connection, and the radius R satisfies that the radius R is more than 3mm and less than 10 mm.
7. A removable plate glow discharge electrode according to claim 4 wherein: in the plate electrode (1), the width of the long rectangular plane (104) and the width of the small rectangular plane (106) are C.
8. A can dismantle board-like glow discharge electrode subassembly which characterized in that: the electrode support comprises a plate electrode (1), an insulating connecting plate (3), an insulating support (2) which is arranged on the plate electrode (1) and penetrates through an insulating component positioning hole (5) processed on the connecting plate (3), and an electrode support (4) arranged on the connecting plate (3).
9. A removable plate glow-discharge electrode assembly according to claim 8, wherein: the two insulating supports (2) are respectively fixed on the upper and lower plate surfaces close to the end parts of the plate electrode (1), the direction of the two insulating supports is vertical to the plate surfaces, and the two insulating supports are fixed through a fastening piece (8); positioning holes (5) are processed at corresponding positions on the insulating connecting plates (3), the upper ends of the insulating supports (2) respectively penetrate through the corresponding positioning holes (5), and a fastening piece (8) is installed at the top of each insulating support (2); the two electrode supports (4) are positioned between the two insulating supports (2), the bottoms of the electrode supports (4) are fixed on the plate surface of the insulating connecting plate (3) through fasteners (8), and the direction of the electrode supports is perpendicular to the plate surface.
10. A removable plate glow-discharge electrode assembly as claimed in claim 9, wherein: the plate electrode (1) comprises a plane a (101) and two cambered surfaces (103), wherein the plane a (101) and the two cambered surfaces (103) are positioned on the front surface, and the two cambered surfaces (103) are respectively and symmetrically arranged above and below the plane a (101); comprises a plane b (102) located on the side; the device also comprises a long rectangular plane (104) and two small rectangular planes (106) which are positioned on the back surface, wherein the two small rectangular planes (106) are respectively and symmetrically arranged above and below the long rectangular plane (104);
the middle section of the plane b (102) is still a rectangle with equal space on two sides;
the plane 101 is in transition connection with the cambered surface (103) and is bent to form a backward tilting structure with symmetrical upper and lower end surfaces; the long rectangular plane (104) and the small rectangular planes (106) at the upper end and the lower end are in transition connection by adopting an arc curved surface;
the top and the bottom of the plate electrode (1) are respectively connected with an upper cambered surface (103) and a lower cambered surface (106) by an arc plane correspondingly to form a curved surface (105).
11. A removable plate glow-discharge electrode assembly as claimed in claim 10, wherein: the front surface and the side surface, and the side surface and the back surface of the plate electrode (1) are connected by adopting circular arc transition curved surfaces; the connecting parts of the upper edge, the lower edge and the outer side edge of the plane b (102) or the connecting parts of the front surface, the back surface and the side surface are smoothly transited by hyperboloids (107).
12. A removable plate glow-discharge electrode assembly as claimed in claim 10, wherein: the area facing the plasma formed by the plate electrode (1) is (n.S)10) The number of all plate electrodes (1) is n, and (n.S) is satisfied10) And S is greater than 1/2000, and S is the total wall area in the vacuum chamber of the nuclear fusion device.
13. A removable plate glow-discharge electrode assembly according to claim 12 wherein: in the plate electrode (1), the length A of a single cambered surface (103), the length B of a plane a (101), and the width C of the plane a (101) and the cambered surface (103) need to satisfy the conditions that A/C is more than 1/1.1 and less than 1.1/1 and A/B is more than 1/3 and less than 1/2.
14. A removable plate glow-discharge electrode assembly according to claim 13 wherein: in the plate-type electrode (1), the long rectangular plane (104) and the upper and lower small rectangular planes (106) form an included angle beta, and the included angle beta is more than 125 degrees and less than 150 degrees.
15. A removable plate glow discharge electrode according to claim 14 wherein: in the plate electrode (1), the plane a (101) and the arc surface (103), the long rectangular plane (104) and the small rectangular plane (106) are in fillet transition connection, and the radius R satisfies that the radius R is more than 3mm and less than 10 mm.
16. A removable plate glow discharge electrode according to claim 13 wherein: in the plate electrode (1), the width of the long rectangular plane (104) and the width of the small rectangular plane (106) are C.
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| CN202111623040.8A CN114388150A (en) | 2021-12-28 | 2021-12-28 | Detachable plate type glow discharge electrode and electrode assembly |
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Application publication date: 20220422 |