CN113035379A - Single-stage high-speed feeding system based on compact ring plasma - Google Patents
Single-stage high-speed feeding system based on compact ring plasma Download PDFInfo
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 120
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- 230000001133 acceleration Effects 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 15
- 239000000446 fuel Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims description 51
- 238000002347 injection Methods 0.000 claims description 32
- 239000007924 injection Substances 0.000 claims description 32
- 230000004907 flux Effects 0.000 claims description 13
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- 239000002737 fuel gas Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
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- 230000002401 inhibitory effect Effects 0.000 abstract description 3
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- 229910052987 metal hydride Inorganic materials 0.000 abstract 1
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- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 5
- 229910052722 tritium Inorganic materials 0.000 description 5
- 239000004809 Teflon Substances 0.000 description 4
- 229920006362 Teflon® Polymers 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 description 2
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21B—FUSION REACTORS
- G21B1/00—Thermonuclear fusion reactors
- G21B1/11—Details
- G21B1/15—Particle injectors for producing thermonuclear fusion reactions, e.g. pellet injectors
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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
Abstract
The invention relates to a single-stage high-speed feeding system based on compact ring plasma, which adopts the compact ring plasma as fuel particles and adopts a single-stage capacitor to finish the processes of front end formation and rear end acceleration of the compact ring plasma so as to form a cylindrical single-stage high-speed feeding system; the charging system comprises a host device and a single-stage capacitor, wherein the host device comprises a solenoid, a metal cylindrical inner electrode and a metal cylindrical outer electrode; the formation and acceleration processes of the compact ring plasma are completed by adopting a single-stage capacitor, so that the construction cost is saved; the ratio of the metal cylindrical inner electrode at the tail part of the host device to the metal cylindrical outer electrode is 1/5, so that the speed and the acceleration efficiency of the compact ring plasma are obviously improved. The invention solves the problem of core charging which is difficult to realize by the existing charging means such as supplementary gas supply, ultrasonic molecular beams and bullets, and provides technical means for improving the confinement of plasma in a nuclear fusion device, inhibiting MHD (hydrogen-metal-hydride) mode, lightening plasma fracture and the like.
Description
Technical Field
The invention relates to the technical field of nuclear fusion, in particular to a single-stage high-speed feeding system based on compact ring plasma.
Background
The Chinese fusion engineering experimental reactor (CFETR) establishes two main targets, namely realizing the steady-state fusion power of 1GW and realizing tritium self-sustaining. The existing research results show that the fusion power of the core plasma can be obviously improved by directly injecting fuel particles (deuterium and tritium) into the core plasma, and meanwhile, the requirement on tritium increment rate (TBR) can be obviously reduced, so that the aim of self-sustaining of CFETR tritium is fulfilled. Core feeds have become one of the core means of controlling fusion combustion plasmas. The core part feeding is difficult to realize by the existing feeding means such as supplementary air feeding, ultrasonic molecular beams and bullets.
The problem of how to overcome the strong magnetic field repulsion effect of a large tokamak device and directly inject fuel into a core reaction area is always solved by researchers. Conventional charging methods, such as: the acceleration effect of the shot injection, ultrasonic gas injection, plasma jet and the like on the fuel particles is respectively different from less than 1km/s to 30km/s, and is not enough to directly penetrate into the high-temperature and high-density Tokamak central area.
Therefore, the existing charging technology has the core charging problem that supplemental air supply, ultrasonic molecular beams and bullets are difficult to realize.
Disclosure of Invention
The invention solves the problems: the defects of the prior art are overcome, the single-stage high-speed feeding system based on the compact ring plasma is provided, the core feeding problem that the existing feeding means such as supplementary air supply, ultrasonic molecular beams and bullets are difficult to realize is solved, and a new technical path is provided for improving the confinement of the plasma in a nuclear fusion device, inhibiting an MHD (hydrogen-induced high-definition) mode and relieving the plasma breakage.
The technical scheme of the invention is as follows: a single-stage high-speed feeding system based on compact ring plasma adopts the compact ring plasma as fuel particles, and adopts a single-stage capacitor to complete the processes of front end formation and rear end acceleration of the compact ring plasma, so as to form the cylindrical single-stage high-speed feeding system.
The single-stage high-speed feeding system comprises a host device and a single-stage capacitor; the host device comprises a solenoid coil, two metal cylindrical inner electrodes with different radiuses, a single metal cylindrical outer electrode and a gas injection window, wherein the two metal cylindrical inner electrodes with different radiuses are welded together, namely a front-end metal cylindrical inner electrode and a rear-end metal cylindrical inner electrode; the solenoid coil which is the innermost part in turn from inside to outside is fixed on a metal circular ring cover plate through an insulating material, two metal cylindrical inner electrodes with different radiuses are arranged in the middle, the outer layers of the two metal cylindrical inner electrodes with different radiuses are single metal cylindrical outer electrodes, a plurality of gas injection windows which are uniformly distributed in the radial direction are arranged on the single metal cylindrical outer electrode, fuel gas injected through the gas injection windows diffuses between the metal cylindrical inner electrodes and the metal cylindrical outer electrodes, and the injected fuel gas forms compact ring plasma through ionization and acceleration of a single-stage capacitor.
The length ratio of the front-end metal cylinder inner electrode to the rear-end metal cylinder inner electrode is 3/7, the radius ratio of the rear-end metal cylinder inner electrode to a single metal cylinder outer electrode is 1/5, the charging system with the characteristics remarkably improves the speed and the acceleration efficiency of the compact ring plasma, the speed of the compact ring plasma generated by the charging system is 150 km/s-1000 km/s, the acceleration efficiency is 20% -50%, the compact ring plasma serving as fuel particles can directly penetrate into a high-temperature and high-density Tokamak central area, and the problem of core charging which is difficult to achieve by the existing charging means is solved.
The charging system generates a compact toroidal plasma having a density greater than 1.6 x 10-3Momentum of N.S is more than 1021m-3The density of the Tokamak plasma is controlled by injecting the compact ring plasma into the center area of the Tokamak plasma, so that the annular flow speed of the Tokamak plasma can be controlled, the restriction of the Tokamak plasma is improved, an MHD (metal-hydrogen-metal) mode is inhibited, and the fracture of the Tokamak plasma is relieved.
The tail end of the outer electrode of the metal cylinder is welded with a metal ring plate flange, and the metal ring plate flange is used for being connected with a test platform or a drift tube during experimental test.
The length, the number of turns and the winding size of the solenoid coil are determined according to the molding requirement of magnetic flux and compact ring plasma, and the relational expression of the magnetic flux and the radius of the compact ring plasma is
The relationship between the magnetic flux and the distance between the two metal cylindrical inner electrodes with different radiuses and the metal cylindrical outer electrode in the host device is as follows
Is the magnetic flux, B is the magnetic induction, R is the coil radius, IfIs to form a compact ring plasmaAnd the shape current, lambda is the intrinsic value of the helicity, and delta is the distance between the inner electrode and the outer electrode of two metal cylinders with different radiuses in the formation region.
The single-stage capacitor single discharge satisfies the formation and acceleration of the compact ring plasma in the host device, the compact ring plasma is generated through the front end of the host device, the compact ring plasma is accelerated to a high-speed state through electromagnetic force at the rear end of the host device, and finally the compact ring plasma is ejected from an opening at the rear end of the host device, the whole time of the compact ring plasma formation and acceleration process is within 100 mu s, only one time of discharge of a single capacitor is needed in the whole process, and meanwhile, the speed and the density of the compact ring charging system can be adjusted through the adjustment of the single-stage capacitor.
The single-stage high-speed charging system based on the compact ring plasma has good host device tightness, and the host device needs to be vacuumized to 10 degrees when the system is started-5And Pa, the gas injected from the gas injection window is high-pressure gas with the purity higher than 99.999% and the gas pressure range of 0.2-8.0 MPa.
The working principle of the single-stage high-speed feeding system based on the compact ring plasma is as follows:
(a) firstly, electrifying a solenoid coil to generate a poloidal magnetic field, and injecting gas between a metal cylindrical inner electrode and a metal cylindrical outer electrode from a gas injection window;
(b) after the gas is uniformly diffused between the metal cylindrical inner electrode and the metal cylindrical outer electrode, triggering a single-stage capacitor, and breaking down the single-stage capacitor between the metal cylindrical inner electrode and the metal cylindrical outer electrode to ionize the gas into plasma;
(c) the compact ring plasma passing through the front end of the host device is formed into the compact ring plasma after the annular magnetic field generated by radial current and the polar magnetic field are coupled, the compact ring plasma is accelerated to a high-speed state in an acceleration region by electromagnetic force, and finally the compact ring plasma is ejected from the tail end of the host device.
Compared with the prior art, the invention has the advantages that:
(1) the single-stage high-speed feeding system of the compact ring plasma is a new feeding method of a nuclear fusion device developed on the application of the compact ring plasma technology, and simultaneously provides a method for completing the formation and acceleration processes of the compact ring plasma by using a single-stage capacitor, solves the problem of fusion device core feeding which is difficult to realize by the existing feeding means, and provides a new research technical path for improving the confinement of the plasma in the nuclear fusion device, inhibiting MHD (hydrogen-metal-hydrogen) mode, lightening plasma fracture and the like.
(2) In the host device of the single-stage high-speed charging system based on the compact ring plasma, the ratio of the length of the front-end metal cylindrical inner electrode to the length of the rear-end metal cylindrical inner electrode is designed to be 3/7, and the ratio of the radius of the tail-end metal cylindrical inner electrode to the radius of the metal cylindrical outer electrode is designed to be 1/5.
(3) The speed of the compact ring plasma generated by the charging system is 150 km/s-1000 km/s, the acceleration efficiency is 20% -50%, and the compact ring plasma has the speed of more than 1.6 multiplied by 10-3Momentum of N.S is more than 1021m-3Such that the fuel particles can penetrate directly into the fusion reaction core region of the nuclear fusion device.
(4) The compact ring plasma generated by the single-stage high-speed charging system based on the compact ring plasma is a plasma with circumferential momentum and rotating continuously, the compact ring plasma is injected into the Tokamak plasma tangentially, the compact ring plasma can inject the circumferential momentum into the Tokamak plasma to control the circumferential flow speed, the circumferential flow can improve the restraint of the Tokamak plasma, inhibit an MHD (hydrogen-metal) module and reduce the cracking and the like of the Tokamak plasma, and therefore the single-stage high-speed charging system based on the compact ring plasma can provide a research technical means for controlling the circumferential flow speed by injecting the circumferential momentum into the Tokamak plasma.
(5) The single-stage high-speed charging system based on the compact ring plasma only comprises one capacitor, and the speed of the charging system and the acceleration efficiency of fuel particles can be adjusted by adjusting the capacitor.
(6) The main machine device of the invention does not contain a compression part, and the compact ring plasma generated by the charging system can be rapidly accelerated so as to be injected into the fusion device, thereby ensuring the structural integrity of the compact ring as fuel particles. Under the same circuit parameters, the single-stage capacitor can convert more electric energy into kinetic energy of the compact ring plasma or increase the acceleration efficiency of the compact ring plasma.
Drawings
FIG. 1 is a schematic diagram of the single stage high velocity feed system of the present invention based on a compact toroid plasma;
FIG. 2 is a schematic diagram of a host device configuration for a compact toroid plasma based single stage high velocity feed system of the present invention;
FIG. 3 is a schematic cross-sectional view of a main unit of the single-pole high-speed charging system based on compact toroid plasma according to the present invention;
FIG. 4 is a top plan view of an apparatus for a single stage high velocity feed system based on a compact toroid plasma in accordance with the present invention.
The gas injection device comprises a polytetrafluoroethylene cylinder 1, a metal cylinder outer electrode 2, a grounding electrode 3, a solenoid coil 4, a poloidal magnetic field 5, a gas injection window 6, a front metal cylinder inner electrode 7, a single-stage capacitor 8, a rear metal cylinder inner electrode 9, a metal circular ring plate flange 10, a compact ring plasma poloidal magnetic field 11, a compact ring plasma toroidal magnetic field 12, a compact ring plasma 13, a polytetrafluoroethylene circular ring plate flange 14, a metal circular ring welding plate 15, a polytetrafluoroethylene circular ring 16, a metal circular ring inner electrode welding plate 17, a first gas injection window 601, a second gas injection window 602, a third gas injection window 603, a fourth gas injection window 604, a fifth gas injection window 605 and a sixth gas injection window 606.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
The single-stage high-speed feeding system based on the compact ring plasma adopts the compact ring plasma as fuel particles, and adopts the single-stage capacitor to complete the processes of front end formation and rear end acceleration of the compact ring plasma, so as to form the cylindrical single-stage high-speed feeding system; the charging system comprises a host device and a single-stage capacitor, wherein the host device comprises a solenoid, a metal cylindrical inner electrode and a metal cylindrical outer electrode; the formation and acceleration processes of the compact ring plasma are completed by adopting a single-stage capacitor, so that the construction cost is saved; the ratio of the metal cylinder inner electrode at the tail of the host device to the metal cylinder outer electrode is 1/5, the ratio of the length of the front end metal cylinder inner electrode to the length of the rear end metal cylinder inner electrode is 3/7, the length of the front end metal cylinder inner electrode is 0.3m, the radius of the front end metal cylinder inner electrode is 0.07m, the length of the rear end metal cylinder inner electrode is 0.7m, the radius of the rear end metal cylinder inner electrode is 0.02m, the length of the metal cylinder outer electrode is 0.9m, and the radius of the rear end metal cylinder inner electrode is 0.1 m.
The length, the number of turns and the winding size of the solenoid coil are determined according to the formation requirements of magnetic flux and compact ring plasma, and the relational expression of the magnetic flux and the radius of the compact ring plasma is
The relationship between the magnetic flux and the distance between the two metal cylindrical inner electrodes with different radiuses and the metal cylindrical outer electrode in the host device is as follows
Is the magnetic flux, B is the magnetic induction, R is the coil radius, IfIs the forming current for forming the compact ring plasma, lambda is the intrinsic value of the helicity, delta is the distance between the inner electrode and the outer electrode of two metal cylinders with different radiuses in the forming area. The length of the solenoid coil of the main machine device is 0.30m, the radius is 0.1m, a copper wire with the diameter of 2mm is wound on the solenoid coil, 150 turns are required to be wound, and the winding density is as follows: n is 50/m. According to the magnetic induction intensity of the solenoid coil being 0.1T, the relation between the magnetic induction intensity of the solenoid coil and the current is utilized:
the current required to provide 1600A from the external power source to the solenoid coil is available, resulting in
Of the magnetic flux of (a).
The single-stage capacitor discharge satisfies the formation and acceleration of the compact ring plasma in the host device, the compact ring plasma is generated through the front end of the host device, the compact ring plasma is accelerated to a high-speed state through electromagnetic force at the rear end of the host device, and finally the compact ring plasma is ejected from an opening at the rear end of the host device, the whole time of the compact ring plasma formation and acceleration process is within 100 mu s, only one time of discharge of a single capacitor is needed in the whole process, and meanwhile, the speed and the density of the compact ring plasma feeding system can be adjusted through the adjustment of the single-stage capacitor. The distance between the metal cylindrical inner electrode and the metal cylindrical outer electrode in the compact ring plasma forming area is delta 0.02m, and the intrinsic value of the helicity of the compact ring plasma obtained by the method is
So that the current demand through the compact toroid plasma shaping is related to the solenoid coil flux
It is calculated that a single stage capacitor needs to provide a current with a maximum current exceeding 400KA to form a stable compact ring plasma. The speed of the compact ring plasma depends on the accelerating current of the compact ring plasma in an accelerating region, the larger the accelerating current provided by the single-stage capacitor is, the stronger the electromagnetic force generated by the accelerating current is, and the larger the speed obtained by the compact ring plasma is, the maximum current of the single-stage capacitor used at present is 600KA, and then the single-stage capacitor is researched and developed according to requirements so as to improve the current. The compact toroidal plasma generated using a single stage capacitive feed system has a plasma density of greater than 1.6 x 10-3Momentum of N.S is more than 1020—1023m-3The density of the Tokamak plasma is controlled by injecting the compact ring plasma into the Tokamak plasma tangentially, injecting the compact ring plasma into the central region of the Tokamak plasma and the like, so that the circumferential flow speed of the Tokamak plasma can be controlled, the restriction of the Tokamak plasma is improved, an MHD (metal-dielectric-metal) mode is inhibited, and the fracture of the Tokamak plasma is relieved.
The sealing degree of the main machine device is good, and the main machine device is vacuumized to 10 degrees when being used-5And Pa, the gas injected from the gas injection window is high-pressure gas with the purity higher than 99.999% and the gas pressure range of 0.2-8.0 MPa. The gas that injects from the gas injection window during fusion experiment is hydrogen, need adopt deuterium tritium gas mixture when carrying out large-scale fusion device and reinforced, and the mixing proportion of gas is 1: 1.
as shown in figure 1, the single-stage high-speed charging system based on the compact ring plasma comprises a solenoid coil 4, wherein the solenoid coil 4 is insulated by a polytetrafluoroethylene cylinder 1, a metal cylinder outer electrode 2 and a metal cylinder inner electrode 7 and can generate a polar magnetic field 5 through a self-contained power supply, the front end metal cylinder inner electrode 7 and a rear end metal cylinder inner electrode 9 are welded together in the middle, a gas injection window 6 is formed in the metal cylinder outer electrode 2, and a metal circular ring plate flange 10 is welded at the tail end of the metal cylinder outer electrode 2. The leftmost end is the overall system ground 3, the overall system device being discharged by a single stage capacitor 8.
The working embodiment of the monopole high-speed feeding system based on the compact ring plasma is as follows:
(1) when the device is started, the vacuum degree between the interior of the device and a gas transmission pipeline is ensured to be 10-5After Pa is above, a poloidal magnetic field 5 is generated by using a solenoid coil 4, and gas is injected between a metal cylindrical inner electrode 7 at the front end of the device and a metal cylindrical outer electrode 2 from a gas injection window 6;
(2) the gas is uniformly diffused between the front-end metal cylindrical inner electrode 7 and the metal cylindrical outer electrode 2, then the single-stage capacitor 8 is triggered, and the single-stage capacitor 8 breaks down between the front-end metal cylindrical inner electrode 7 and the metal cylindrical outer electrode 2 and ionizes the gas into plasma;
(3) the plasma passing through the front end of the main machine device is recombined with the toroidal magnetic field generated by the radial current and the poloidal magnetic field 5 generated by the solenoid coil 4 to form compact ring plasma, and the compact ring plasma is accelerated to a high-speed state in an acceleration region by electromagnetic force and finally ejected from the tail end of the main machine device.
As shown in fig. 1 and 2, a teflon cylinder 1 of a host device of a single-stage high-speed charging system based on compact ring plasma is fixed with a teflon ring plate flange 14 by screws, the teflon ring plate flange 14 is fixed with a metal ring outer electrode welding plate 15, a plurality of gas injection windows 6 (6 are adopted in the embodiment of the invention) are arranged on the metal cylinder outer electrode 2, so that gas is uniformly diffused between a front end metal cylinder inner electrode 7 and the metal cylinder outer electrode 2, the front end metal cylinder inner electrode 7 and a rear end metal cylinder inner electrode 9 are welded together inside the rear end of the host device, and a metal ring plate flange 10 is welded at the tail end of the metal cylinder outer electrode 2.
As shown in fig. 3, the innermost of the host device of the present invention is placed a solenoid coil 4, insulated from the front end metal cylindrical inner electrode 7 and the metal cylindrical outer electrode 2, and the solenoid coil 4 is fixed with the metal ring inner electrode welding plate 17 by adopting an insulating material, after the metal ring inner electrode welding plate 17 is fixed with the polytetrafluoroethylene ring 16, and the polytetrafluoroethylene ring 16 and the polytetrafluoroethylene cylinder 1 made of insulating materials are sealed and fixed, the polytetrafluoroethylene cylinder 1 and a polytetrafluoroethylene ring plate flange 14 are sealed and fixed, and then a metal ring outer electrode welding plate 15 is sealed and fixed by screws, the metal ring outer electrode welding plate 15 and a metal cylinder outer electrode 2 are welded together, the tail end is welded with a metal ring plate flange 10, and the front end metal cylinder inner electrode 7 and the rear end metal cylinder inner electrode 9 are welded together and positioned in the device.
As shown in fig. 3 and 4, the single-stage high-speed charging system based on compact ring plasma is characterized in that a teflon cylinder 1 is fixed on a metal cylinder outer electrode 2 from inside to outside in sequence, a solenoid coil 4 is located at the innermost part of a host device and is fixed with a front end metal cylinder inner electrode 7 by adopting an insulating material, and 6 gas injection windows 6 are arranged on the metal cylinder outer electrode 2 and are respectively a first gas injection window 601, a second gas injection window 602, a third gas injection window 603 and a fourth gas injection window 604, namely a fifth gas injection window 605 and a sixth gas injection window 606. The diameter of 6 gas injection windows which are arranged on the metal cylindrical outer electrode 2 is 2cm, and the gas injection windows are uniformly distributed on the metal cylindrical outer electrode 2 in the radial direction.
The single-pole high-speed charging system based on compact toroid plasma is described in detail with reference to the embodiments, which are illustrative and not restrictive, and thus variations and modifications that do not depart from the general concept of the present invention are intended to be within the scope of the present invention.
Claims (8)
1. A high-speed charging system of single-stage based on compact ring plasma which characterized in that: the compact ring plasma is used as fuel particles, and the front end formation and the rear end acceleration process of the compact ring plasma are completed by adopting a single-stage capacitor, so that a cylindrical single-stage high-speed feeding system is formed.
2. The compact toroid plasma based single stage high velocity feed system according to claim 1, wherein: the single-stage high-speed feeding system comprises a host device and a single-stage capacitor; the host device comprises a solenoid coil, two metal cylindrical inner electrodes with different radiuses, a single metal cylindrical outer electrode and a gas injection window, wherein the two metal cylindrical inner electrodes with different radiuses are welded together, namely a front-end metal cylindrical inner electrode and a rear-end metal cylindrical inner electrode; the solenoid coil which is the innermost part in turn from inside to outside is fixed on a metal circular ring cover plate through an insulating material, two metal cylindrical inner electrodes with different radiuses are arranged in the middle, the outer layers of the two metal cylindrical inner electrodes with different radiuses are single metal cylindrical outer electrodes, a plurality of gas injection windows which are uniformly distributed in the radial direction are arranged on the single metal cylindrical outer electrode, fuel gas injected through the windows diffuses between the metal cylindrical inner electrodes and the metal cylindrical outer electrodes, and the injected fuel gas forms compact ring plasma through ionization and acceleration of a single-stage capacitor.
3. The compact toroid plasma based single stage high velocity feed system according to claim 2, wherein: the length ratio of the front-end metal cylinder inner electrode to the rear-end metal cylinder inner electrode is 3/7, the radius ratio of the rear-end metal cylinder inner electrode to a single metal cylinder outer electrode is 1/5, the charging system with the characteristics remarkably improves the speed and the acceleration efficiency of the compact ring plasma, the speed of the compact ring plasma generated by the charging system is 150 km/s-1000 km/s, and the acceleration efficiency is 20% -50%.
4. The compact toroid plasma based single stage high velocity feed system according to claim 1, wherein: the charging system generates a compact toroidal plasma having a density greater than 1.6 x 10-3Momentum of N.S is more than 1021m-3The density of (c).
5. The compact toroid plasma based single stage high velocity feed system according to claim 1, wherein: the tail end of the outer electrode of the metal cylinder is welded with a metal ring plate flange, and the metal ring plate flange is used for being connected with a test platform or a drift tube during experimental test.
6. The compact toroid plasma based single stage high velocity feed system according to claim 1, wherein: the length, the number of turns and the winding size of the solenoid coil are determined according to the molding requirement of magnetic flux and compact ring plasma, and the relational expression of the magnetic flux and the radius of the compact ring plasma is
The relationship between the magnetic flux and the distance between the two metal cylindrical inner electrodes with different radiuses and the metal cylindrical outer electrode in the host device is as follows
Is the magnetic flux, B is the magnetic induction, R is the coil radius, IfIs the forming current for forming the compact ring plasma, lambda is the intrinsic value of the helicity, delta is the distance between the inner electrode and the outer electrode of two metal cylinders with different radiuses in the forming area.
7. The compact toroid plasma based single stage high velocity feed system according to claim 1, wherein: the single-stage capacitor single discharge satisfies the formation and acceleration of the compact ring plasma in the host device, the compact ring plasma is generated through the front end of the host device, the compact ring plasma is accelerated to a high-speed state through electromagnetic force at the rear end of the host device, and finally the compact ring plasma is ejected from an opening at the rear end of the host device, the whole time of the compact ring plasma formation and acceleration process is within 100 mu s, only one time of discharge of a single capacitor is needed in the whole process, and meanwhile, the speed and the density of the compact ring plasma charging system can be adjusted through the adjustment of the single-stage capacitor.
8. The compact toroid plasma based single stage high velocity feed system according to claim 1, wherein: the host device has good sealing degree, and is vacuumized to 10 degrees when being used-5And Pa, the gas injected from the gas injection window is high-pressure gas with the purity higher than 99.999% and the gas pressure range of 0.2-8.0 MPa.
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