50 results about "Stellarator" patented technology

Disclosed herein is a stellarator comprising two sets of coils, namely a set of encircling coils which encircle the plasma axis, and a set of shaping coils which do not encircle any other coil or the plasma. In some embodiments, the encircling coils include a structural element to maintain their shape under magnetic forces. In some embodiments, the shaping coils are mounted onto one or more structural elements which, together with the shaping coils, constitute a field shaping unit. Also disclosed is a controller which may modify the electrical current flowing in one or more subsets of the coils in order to achieve target plasma parameters. Also disclosed is a method of designing a set of shaping coils by discretizing a surface dipole or current potential distribution.

A stellarator comprising a non-planar magnetic field coil with a cable as well as a method for providing a cable for a non-planar magnetic field coil in a stellarator is presented. Additionally, a cable and a method for manufacturing a cable are presented. The cable comprises an inner section (100) comprising multiple layers of superconductor material (200), the multiple layers of superconductor material (200) having a first orientation (210, 210a, 210b, 210c), an outer section (300) surrounding the inner section (100), the outer section (300) having a cross-section (310) with a second orientation (320, 320a, 320b, 320c), wherein the outer section (300) comprises a first conductive material (410) which fixes the first orientation (210, 210a, 210b, 210c), wherein the first orientation (210, 210a, 210b, 210c) changes along a length (50) of the cable (40) with respect to the second orientation (320, 320a, 320b, 320c).

A stellarator comprising a non-planar magnetic field coil with a cable as well as a method for providing a cable for a non-planar magnetic field coil in a stellarator is presented. The cable comprises an inner section (100) comprising multiple layers of superconductor material (200), the multiple layers of superconductor material (200) having a first orientation (210, 210a, 210b, 210c), an outer section (300) surrounding the inner section (100), the outer section (300) having a cross-section (310) with a second orientation (320, 320a, 320b, 320c), wherein the outer section (300) comprises a first conductive material (410) which fixes the first orientation (210, 210a, 210b, 210c), wherein the first orientation (210, 210a, 210b, 210c) changes along a length (50) of the cable (40) with respect to the second orientation (320, 320a, 320b, 320c).

The application discloses a kind of nuclear fusion adaptive control system and method based on reinforcement learning, the control system includes physical layer and control layer, physical layer contains tokamak / stellarator device, Thomson scattering and so on diagnostic system and FPAD / PAM projectile injection system, responsible for collecting plasma density profile, temperature profile and other data and executing fuel supply;Control layer is reinforcement learning intelligent agent, contains state perception, strategy network and execution interface module, strategy network uses PPO / SAC algorithm, state perception is included line average density, density change rate and historical sequence data;The control method is trained offline by Torax simulator, is optimized by composite reward function, forms perception-decision-making-execution-feedback closed-loop control, supports real machine deployment and online fine tuning.The application solves the problem of traditional PID control lag, adaptive difference, the control precision is improved by about 40%, density fluctuation is reduced by about 50%, prolongs hardware maintenance cycle, adapts nuclear fusion long pulse operation demand.

The invention discloses an ultra-low temperature vacuum system of a Tokamak or star imitator adaptive to nuclear fusion, and relates to the technical field of nuclear fusion equipment, the ultra-low temperature vacuum system comprises a vacuum chamber, a plasma state sensor is embedded in the inner wall of the vacuum chamber, the outer end of the vacuum chamber is provided with a sealing interface, the outer end of the sealing interface is provided with a primary filter, and the primary filter is provided with a secondary filter. A getter bin is installed at the outer end of the primary filter, an auxiliary pump is installed at the outer end of the getter bin, a stop valve is installed at the outer end of the auxiliary pump, a cold trap is installed at the outer end of the stop valve, the side wall of the cold trap is connected with a refrigerating machine through a pipeline, and a main pump is installed at the outer end of the cold trap. By arranging a series of structures, the pain point of decoupling of a traditional system and plasma operation is thoroughly solved, all the components cooperate to guarantee the ultrahigh vacuum environment, interference of impurity gas on plasma constraint is greatly reduced, and the stability and success rate of a nuclear fusion experiment are remarkably improved.

This invention provides a winding fixture for a stellarator coil, comprising a winding mold and a radial adjustment component. The winding mold includes an annular support base, an inner side plate, and an outer side plate. The inner and outer side plates are spaced apart along the radial direction of the support base and are fixed to the top of the support base. The inner side plate has multiple connecting portions spaced apart along its circumference, each connecting portion including multiple first threaded through holes spaced apart along the axial direction of the inner side plate. The radial adjustment component is inserted into one of the first threaded through holes of a corresponding connecting portion and threadedly connected to the first threaded through hole. The end face of the radial adjustment component near the outer side plate abuts against the inner surface of the outer side plate or the inner surface of the already wound conductor. By cooperating with the multiple rows of first threaded through holes in the circumference and axial direction of the inner side plate and the radial adjustment component, the radial dimension of the winding can be precisely adjusted, achieving accurate radial positioning of the coil, improving the coil forming quality and magnetic field configuration accuracy, and enhancing the overall performance of the stellarator device.

A stellarator with a non-planar magnetic field coil with a first plate as well as a method of winding a non-planar magnetic field coil for a stellarator is presented. The first plate (100) comprises a first surface (110) with a non-planar geometry and a first recess (120). The first recess (120) extends along a first path (130) along the first surface (110). The first recess (120) has a first cross-section (140).

The application provides a kind of quasi-ring symmetry stellator plasma energy storage diagnostic method and system, it is related to stellator technical field, including adjusting the temperature drift resistance of inverse magnetic differential integrator, according to general discharge waveform, the energization test of quasi-ring symmetry configuration vacuum field magnet coil is carried out, and then the calibration of inverse magnetic differential integrator is completed;Respectively measure and calculate the compensation coefficient of each magnet coil;In the vacuum condition, the same coil configuration parameter is carried out in the plasma discharge experiment of quasi-ring symmetry stellator test device, and the wall eddy current stray field data under corresponding condition is obtained;Combined with the compensation coefficient of magnet coil and wall eddy current stray field data, the real inverse magnetic flux in plasma discharge experiment is calculated;And then the real plasma energy storage information in plasma discharge is calculated.The beneficial effects of the application are to improve the measurement accuracy of plasma energy storage signal in stellator device, and to provide experimental data support for stellator plasma physics research.

The present disclosure relates to a stellarator (1) comprising: a plurality of non-planar, superconducting coils, for generating a magnetic field for confining a plasma inside a plasma vessel; and a coil support structure (30, 40, 50) comprising: a first structural arrangement (30) arranged between a center (20) of the stellarator and the plasma vessel and configured to balance a radial force exerted by the magnetic field on the plurality of coils; a second structural arrangement (40, 50) configured to balance local forces exerted by the magnetic field on one or more coil segments of the plurality of coils; wherein the local forces cause at least a toroidal motion and / or a toroidal deformation of the one or more segments of the plurality of coils.

The invention discloses a superconducting magnet inner joint structure suitable for a star simulator and a use method thereof, and relates to the technical field of superconducting cables, the structure comprises a shell, at least two superconducting conductors and a crimping assembly, a protection chamber is formed in the shell, and two ends of the shell are provided with sealing ports. A metal stable layer at a connecting end, extending into a protection cavity, of a superconducting conductor is removed to form an exposed superconducting layer window, and then pressure is applied to the connecting end through a crimping assembly arranged on a shell, so that superconducting layers in the superconducting layer windows of different superconducting conductors are in direct physical contact in the protection cavity and form electric connection; the metal stable layer at the connecting end is removed, so that the current does not need to be transmitted through the metal stable layer with high conductivity, but is directly conducted through the superconducting layer in the superconducting layer window, the generation of Joule heat is avoided, and the advantage of low loss of the superconducting material is fully exerted.

A stellarator, comprising a non-planar magnetic field coil including at least one winding of a high temperature superconductor, HTS, cable (500), the HTS cable (500) comprising in a first cross-section (530): - first multiple layers of superconductor material (100) with: a first geometric orientation (110, 111), a first magnetic orientation (120), and a first angle (310) between the first geometric orientation (110) and the first magnetic orientation (120); - second multiple layers of superconductor material (200) with: a second geometric orientation (210, 211), a second magnetic orientation (220), and a second angle (320) between the second geometric orientation (210) and the second magnetic orientation (220); with a third angle (330) between the first magnetic orientation (120) and the second magnetic orientation (220), wherein the third angle (330) is larger or smaller than o°.

The invention provides a magnetic field configuration tracing imaging system and method of a star simulator. The magnetic field configuration tracing imaging system comprises an electron beam emission regulation and control unit, a dynamic fluorescence imaging unit and an image acquisition unit, the electron beam emission regulation and control unit is used for emitting electron beams in the three-dimensional vacuum magnetic field; the dynamic fluorescence imaging unit comprises a fluorescence grid mesh arranged at a selected Poincare section of the three-dimensional vacuum magnetic field, and a grid mesh driving mechanism for driving the fluorescence grid mesh to perform periodic reciprocating motion; and the image acquisition unit is used for imaging the fluorescent grid mesh. According to the invention, the fluorescent grid mesh is creatively enabled to do periodic reciprocating motion and is matched with the image acquisition unit, so that not only can the magnetic field configuration measurement of the three-dimensional vacuum magnetic field be realized, but also the inherent imaging blind area of the static grid mesh is eliminated, and thus more accurate and continuous magnetic surface track images can be obtained; and more reliable support is provided for accurately verifying the magnetic field configuration of the three-dimensional vacuum magnetic field of the star simulator.

The invention discloses a partitioned cold shield assembly for a vacuum chamber of a star simulator and a vacuum chamber cold shield, and belongs to the technical field of magnetic confinement nuclear fusion equipment. The vacuum chamber comprises a vacuum chamber body, a block type cooling assembly is arranged on the outer wall of the vacuum chamber body, the block type cooling assembly comprises a plurality of cooling blocks, each cooling block comprises a cooling panel, grooves are formed in the outer walls of the cooling panels, and a plurality of snake-shaped cooling pipelines are fixedly connected to the inner walls of the grooves; mLI heat insulation material layers are laid between the opposite sides of the multiple cooling panels and the vacuum chamber body, through the evenly-arranged S-shaped cooling pipelines, all-around even heat exchange can be achieved, heat is guided to be directionally transmitted along a preset efficient path, and therefore radiant heat is rapidly removed, the overall heat shielding efficiency is effectively improved, and the service life of the vacuum chamber is prolonged. The operation load of a low-temperature system is reduced, meanwhile, the local flow dead zone or short circuit phenomenon is eliminated, and the consistency and reliability of the cooling strength of the surface of the whole annular cold shield are ensured.

The application discloses a kind of nuclear fusion star simulator magnet coil curvature deformation precision scanning measurement device and method, belong to nuclear fusion device precision measurement technical field.Device includes pedestal, support column, outer ring frame, rotary motor sliding seat, radial adjusting rod, main measurement scanning ring probe, center shaft and auxiliary measurement arm;The star simulator magnet coil to be measured is installed in the inside of outer ring frame, rotary motor sliding seat is slid along the circumference of outer ring frame 360 °, radial adjusting rod drives measurement probe to realize radial precision feed, and the supplementary measurement of complex area of coil is completed.Method is realized by establishing unified measurement coordinate system, and three-dimensional point cloud data are collected by full circumferential continuous scanning, and curvature deformation deviation report is generated by curve reconstruction, curvature calculation and comparison with theoretical model.The application solves the problems of low efficiency, insufficient accuracy and inability to continuously scan in full circumferential direction of traditional measurement methods, and the measurement accuracy reaches sub-micron level, providing data support for coil manufacturing, assembly and operation and maintenance.

The utility model discloses a kind of star imitator CICC superconducting joint structure, for the end of multiple conductors is electrically connected, each conductor includes conductor core and the conductor armor covered in the outer periphery of conductor core. Superconducting joint structure includes sealing shell and the connecting assembly fixed in sealing shell;The end of each conductor removes conductor armor, and conductor core end part is inserted into sealing shell from one end of sealing shell, and is electrically connected each other in sealing shell by connecting assembly. Multiple through holes are provided in one end of sealing shell, and each conductor core end part is inserted into sealing shell from corresponding one through hole, and the conductor armor end part of each conductor surrounds corresponding one through hole, abuts and is fixedly sealed in the end face of one end of sealing shell. The superconducting joint structure has the advantages of simple structure, fixed conductor is quickly convenient, and good sealing performance.

The invention discloses a three-dimensional superconducting coil winding blanking platform for a star simulator, which relates to the field of nuclear fusion coil winding forming and comprises a platform base, a mold platform, a square tube base, a mold supporting base, a blanking mold and a limiting tool, by means of different installation modes of the flat plate and the bent plate in the limiting tool, the ejector block can make contact with different orientations of all sections of the coil mold, then the falling mold is subjected to local shape correction through the arc face of the ejector block and certain angle adjustment of the limiting tool, and therefore the falling mold meets the requirement for contour precision.

This invention provides a multi-objective optimization method for nonplanar coils in stellarators and a stellarator magnet. The optimization method includes: obtaining the initial structure of multiple nonplanar superconducting coils based on the magnetic field configuration data of the target plasma; constructing an objective function based on the target magnetic field parameters, engineering constraint parameters, and material constraint parameters of the configuration data, wherein the engineering constraint parameters include the engineering limiting geometric parameters of the nonplanar superconducting coils, and the material constraint parameters include the limiting current carrying capacity of the nonplanar superconducting coil material; minimizing the objective function to obtain optimized coil data; and solidifying the multiple nonplanar superconducting coils based on the optimized coil data to obtain optimized models of multiple nonplanar superconducting coils. The optimization method of this invention constructs a three-dimensional constraint system of "magnetic field matching - engineering feasibility - material safety," avoiding the problem of engineering implementation failure.

A stellarator, comprising a non-planar magnetic field coil including at least one winding of a high temperature superconductor, HTS, cable (500), the HTS cable (500) comprising in a first cross-section (530): - first multiple layers of superconductor material (100) with: a first geometric orientation (110, 111) ) defined as a first plane in which the first multiple layers of superconductor material (100) have the lowest sensitivity to an external magnetic field, a first magnetic orientation (120), and a first angle (310) between the first geometric orientation (110) and the first magnetic orientation (120); - second multiple layers of superconductor material (200) with: a second geometric orientation (210, 211), a second magnetic orientation (220) defined as a second plane in which the second multiple layers of superconductor material (200) have the lowest sensitivity to the external magnetic field, and a second angle (320) between the second geometric orientation (210) and the second magnetic orientation (220); with a third angle (330) between the first magnetic orientation (120) and the second magnetic orientation (220), wherein the third angle (330) is larger or smaller than 0°.

The invention provides an air exhaust limiter structure for a star imitator device and the star imitator device, and relates to the field of magnetic confinement plasma devices.The air exhaust limiter structure comprises a limiter component which is arranged in a vacuum chamber and is close to a plasma boundary position; the getter pump module is arranged on the side, back to the plasma, of the limiter component, communicates with the limiter area through an air exhaust channel and is used for conducting non-flow type adsorption capture on neutral gas entering from the boundary of the plasma; according to the scheme, the getter pump module is integrated nearby the limiter component in a compact and modular mode, local air exhaust close to a particle source is achieved, the structure does not depend on a liquid helium or liquid nitrogen pipeline, a cold shield and other low-temperature systems as main air exhaust means, operation and maintenance are simplified, the long-term steady-state operation requirement of a star imitator device is met, and the structure is simple. The method has potential engineering adaptability in tritium-related application scenarios and in the presence of neutron irradiation devices.

The utility model discloses a supporting device of a superconducting magnet, a superconducting magnet assembly and a star imitator, the supporting device comprises a first supporting part, a thermal cut-off part and a second supporting part which are sequentially connected along a first direction, and the thermal cut-off part is arranged between the first supporting part and the second supporting part; a cooling flow channel used for transmitting a cooling medium is formed in the heat cut-off part, the temperature of the heat cut-off part is actively reduced through the internal cooling flow channel by circulating the cooling medium, heat conduction from the installation face to the superconducting magnet is reduced, and therefore the first supporting part and the second supporting part can be arranged to be of a structure with good rigidity; therefore, the supporting stability of the superconducting magnet can be met, the advantages of good supporting stability and low thermal conductivity can be considered, and the stability of the star imitator working for a long time can be improved when the superconducting magnet is applied to the star imitator.

The invention discloses a connector connecting structure of a superconducting cable for a star simulator superconducting magnet, and relates to the technical field of superconducting cable connector connection, and the connector connecting structure comprises a clamp system which is used for clamping the connecting end of the superconducting cable and is provided with a first clamping plate and a second clamping plate. A plurality of fixing structures are arranged between the first clamping plate and the second clamping plate, the fixing structures are at least used for connecting the first clamping plate and the second clamping plate together and fixing the current distance between the first clamping plate and the second clamping plate, and first fixing rods are arranged in the fixing structures. As long as it is guaranteed that the first clamping plate and the second clamping plate can stably abut against the outer portion of the connecting end of the superconducting cable and extrusion force is continuously provided, the problem of virtual connection or poor contact between the clamp system and the connecting end of the superconducting cable at the low temperature can be avoided, the contact resistance between the clamp system and the connecting end can be reduced, and the problem that the heating value of the connecting position is large is avoided.

A stellarator with a non-planar magnetic field coil with a first plate as well as a method of winding a non-planar magnetic field coil for a stellarator is presented. The first plate (100) comprises a first surface (110) with a non-planar geometry and a first recess (120). The first recess (120) extends along a first path (130) along the first surface (110). The first recess (120) has a first cross-section (140) with a first orientation (150). The first orientation (150) changes along the first path (130) with respect to the first surface (110).

The application provides a stress analysis method suitable for a superconducting magnet winding of a stellarator, comprising: building a finite element model of the superconducting magnet of the stellarator; performing multi-physical field coupling on the finite element model, and performing cutting processing on the coupled finite element model to cut a local region from the finite element model as a cutting block; re-performing multi-physical field coupling on the cutting-processed finite element model to obtain a global model; performing detailed modeling on the winding and the filling layer corresponding to the cutting block to obtain a detailed model; mapping the deformation displacement of the cutting block corresponding to the global model to the detailed model; and solving the displacement-mapped detailed model to determine stress data corresponding to the cutting block. The application can quickly and accurately evaluate the stress of the winding by locally and in detail modeling the cutting block, combining the global model and the local model, and through the displacement mapping method.

The invention relates to the technical field of magnetic confinement fusion energy, and discloses a star simulator complex curved surface permanent magnet blocking method based on magnetization direction clustering. The method comprises the following steps: performing magnetic field inversion calculation according to plasma constraint requirements of a star simulator to establish a grid to obtain a grid point data set, setting a threshold value and a size upper limit through magnetization direction unit vector clamping angle quantity similarity, and dividing magnetic blocks according to magnetization direction similarity space connectivity and size constraint by adopting a clustering algorithm, and carrying out secondary segmentation on the over-limit magnetic block to calculate the average magnetization direction. The magnetic field precision and the manufacturing feasibility of the star simulator permanent magnet system are improved.

This application provides a method for optimizing the quasi-isomagnetic field line symmetry configuration of a stellarator, comprising: obtaining the original magnetic field of the stellarator's quasi-isomagnetic field line symmetry configuration; extracting all original magnetic traps from the original magnetic field, performing a three-step transformation of flattening-stretching-rearrangement on each original magnetic trap to obtain a reference magnetic trap corresponding to each original magnetic trap, and combining all reference magnetic traps to form a reference magnetic field; obtaining the magnetic field parameters of the original magnetic field and the geometric parameters of the stellarator, and constructing an objective function for optimizing the stellarator's quasi-isomagnetic field line symmetry configuration based on the magnetic field parameters, geometric parameters, preset constraint parameters, and preset weighting coefficients; iteratively optimizing the objective function, and outputting the optimized stellarator configuration parameters. The optimization method of this application, by combining magnetic trap transformation, objective function construction, and precise constraint conditions, can output accurate configuration parameters and obtain a stellarator configuration with better plasma confinement performance and reasonable engineering parameters.

The invention discloses an automatic control method for continuous winding of a CICC type high-temperature superconducting coil for a star simulator, relates to the field of intelligent manufacturing, and solves the technical problems of low forming precision and poor environmental adaptability in the continuous winding forming process of irregular-shaped coils. According to the method, target data, cable materials and coil finished product shapes are identified; a parameter identification model is established, and control parameters during coil firing forming are obtained based on the parameter identification model; establishing a digital twinborn model of the firing furnace, and performing environment calibration on the control parameters based on the digital twinborn model to obtain standard control parameters; controlling the firing machine to operate based on the standard control parameters; according to the invention, the performance of the finished coil and the reliability of equipment operation can be improved, so that low efficiency, unstable precision and individual difference influence caused by traditional manual parameter setting depending on experience are avoided.

The present disclosure relates to a star imitator or an assembly comprising a star imitator that includes a removable and / or replaceable component, such as a removable field shaping unit and / or a removable shaping coil. In some embodiments, the star imitator of the present disclosure includes a toroidal sector, the toroidal sector including one or more removable field shaping units.

The present disclosure relates to a stellarator (1) comprising: a plasma vessel (10); a plurality of non-planar, superconducting coils (20) for generating a magnetic field for confining a plasma inside the plasma vessel; a plurality of stellarator modules (8), each stellarator module comprising a plasma vessel segment (10a, 10b) and a corresponding subset of the plurality of non-planar, superconducting coils; wherein neighboring stellarator modules are configured to be coupled to each other via a corresponding plasma vessel interface (30); wherein the plasma vessel interfaces are positioned with respect to the plurality of non-planar, superconducting coils such that at least one of the stellarator modules can be replaced with a replacement stellarator module to restore the plasma vessel and the plurality of coils.

Provided herein are fusion reactor devices that utilize electrical dynamic resistance within a resonant cavity. This is accomplished in conjunction with externally or internally magnetically affixed particle accelerator applications, inertial confinement, magnetic target fusion, field-reverse confinement, plasma accelerators, enhanced electro-coagulation, orbitron cylinder or linear magnetron / klystron, and stellarator designs to enhance space-charge polarization (fusion events) within dielectric mediums. This includes liquid water, water mist, gaseous matter, liquid metals, and even the vacuum of space.