43 results about "Plasma diagnostics" patented technology

The invention discloses a multi-mode magnetic field intelligent closed-loop plasma confinement system and method. The system comprises a multi-mode magnetic field generation module, a multi-dimensional plasma diagnosis module and a layered intelligent closed-loop control module. The multi-mode magnetic field generation module generates a steady-state, pulse and alternating composite magnetic field to realize adjustable space gradient; the multi-dimensional diagnosis module synchronously acquires electrical, optical and particle parameters, and ensures the accuracy through data fusion; and the hierarchical intelligent closed-loop control module generates an adjusting instruction to realize closed-loop optimization based on dynamic threshold and multi-algorithm scheduling. According to the method, the constraint performance is improved through the steps of initialization, data acquisition, state evaluation and closed-loop adjustment in combination with parameter self-optimization and three-level fault protection. According to the scheme, the plasma constraint time exceeds 300 s, the escape rate is lower than 5%, the adjustment response is smaller than or equal to 10 ms, the method adapts to multiple working conditions and can be popularized to the fields of nuclear fusion experiments and plasma processing, and the problems that a traditional system is poor in stability and lags in response are solved.

The invention discloses a plasma diagnosis method and system, and the method comprises the steps: determining a proton source image based on a proton source; generating a first proton beam through the proton source; enabling the first proton beam to pass through the to-be-diagnosed area to form a second proton beam; receiving the second proton beam, and determining a target image; based on the proton source image and the target image, constructing an optimal transport problem from the proton source image to the target image; solving an optimal transport problem, and obtaining an optimal transport probability from the proton source image to the target image; and on the basis of the optimal transport probability, diagnosing the plasma in the to-be-diagnosed area. The plasma diagnosis method has higher calculation progress, and can overcome the defect of difficult convergence caused by singularity of a calculation equation in a strong magnetic field.

A plasma diagnostic apparatus includes a substrate having at least one probe, a plasma diagnostic circuit mounted on the substrate, configured to diagnose plasma in a chamber with the at least one probe, and to store diagnosis result information, a wireless communication circuit mounted on the substrate and configured to wirelessly transmit the diagnosis result information to an external device, and a battery mounted on the substrate and configured to supply power to the plasma diagnostic circuit and to the wireless communication circuit.

The application discloses a surface thermocouple system suitable for a full-tungsten divertor of a magnetic confinement device, and relates to the field of plasma diagnosis of magnetic confinement devices, and comprises a box-shaped support structure and a thermocouple assembly. The tungsten-copper string tube of the divertor is fixedly connected with the box-shaped support structure through fixing pins. The thermocouple assembly is composed of a thermocouple probe, a pyrolytic graphite shell, a base, a screw, a nut, a spring washer, a fixing support plate and a lead wire, and is installed in a cylindrical through hole between adjacent tungsten-copper string tubes and a gap between the tungsten-copper string tube and the box-shaped support structure. The application enables the surface thermocouple to be normally disassembled and maintained, and provides a direct means for measuring the surface temperature of the target plate of the full-tungsten divertor.

This application relates to the field of plasma diagnostic technology and discloses a plasma breakup prediction method based on Alfvén eigenmodes. The method includes: acquiring a diagnostic signal of the plasma; performing a frequency domain transformation on the diagnostic signal to obtain a corresponding amplitude spectrum; detecting the presence of a pressure Alfvén eigenmode (BAE) signal based on the amplitude spectrum; and if the detected pressure Alfvén eigenmode (BAE) is excited by a tearing mode (TM), then the pressure Alfvén eigenmode (BAE) is considered a valid precursor to plasma breakup. This application enables accurate prediction of plasma breakup.

The invention discloses a 10 MeV-level high-brightness ultrafast electron beam source based on quasi-linear laser wake field acceleration and a generation device thereof. Miniaturized repetition frequency ten-megawatt-level femtosecond laser interacts with a gas target capable of generating special gas flow distribution; based on a new quasi-linear laser wake field electron acceleration mechanism, the generation of a 10 MeV-level high-brightness high-performance ultrafast electron beam source can be accelerated. The device effectively solves the problem that it is difficult to accelerate generation of ultrafast electron beams with low energy dispersion, low emittance, high flow intensity, femtosecond pulse width, high brightness and high performance in a sub-ten-megawatt femtosecond laser driving wake field. Therefore, the method is expected to be widely applied to advanced fields such as ultrafast electron diffraction imaging and pumping detection, laser wake field and plasma diagnosis and measurement, high-energy particle acceleration, novel ultrafast coherent radiation source generation and the like.

This application relates to the field of plasma physics technology and provides an asymmetric inversion method and apparatus based on a matching mechanism for plasma diagnostics. The method acquires plasma magnetic flux data, observation lines, and measurement integral values. The magnetic flux data is preprocessed to obtain preprocessed magnetic flux data. Based on the preprocessed magnetic flux data, a closed magnetic surface uniquely matched to each observation line is determined. A lower triangular matrix is ​​constructed based on each observation line and the closed magnetic surface. An inversion equation is constructed based on this lower triangular matrix and the measurement integral values. Finally, the inversion equation is solved to determine the parameter distribution values ​​of the plasma. This method achieves three-dimensional spatial projection of the observation lines and magnetic flux, rapidly determining the position of the closed magnetic surface using geometric relationships, thus improving computational efficiency. Simultaneously, it accurately establishes a one-to-one correspondence between the closed magnetic surface and the observation lines, making the ill-posed problem in solving the matrix equations a unique solution, improving the success rate of solving using the stacking method, and significantly reducing computational errors.

The application provides a kind of electric thruster beam plasma parameter characteristic diagnostic system and method, it is related to plasma diagnostic field, the system includes vacuum chamber, for accommodating electric thruster and providing vacuum environment;Optical fiber signal acquisition module is set to the inside of vacuum chamber, for from multiple angles acquisition optical signal of the beam plasma generated by electric thruster;Image acquisition module is set to the outside of vacuum chamber, with optical fiber signal acquisition module light path connection, for receiving optical signal and converting into two-dimensional image time sequence;Data processing module is connected with communication with image acquisition module, for processing two-dimensional image time sequence, to reconstruct the four-dimensional distribution of the parameter of beam plasma.The application realizes low disturbance, low cost multi-parameter synchronous diagnosis by means of calibration optical fiber, light splitting filter and inversion process, improves efficiency and resolution.

The invention discloses an identification method and related equipment for rapidly identifying a multi-modulus seed magnetic island, and relates to the field of magnetic confinement fusion plasma diagnosis. Wherein at least one group is used for switching observed circumferential positions in different time sequence segments through a waveguide switch in the quasi-optical transmission module. The method comprises the following steps: synchronously acquiring electronic temperature signals of two groups of microwave measurement subsystems at the same radial channel in a time sequence segment corresponding to different annular phase differences, carrying out time averaging on the electronic temperature signals, and judging and identifying a seed magnetic island corresponding to an annular modulus based on the same radial temperature difference and normalization, and further extracting a flat region based on the distribution of the electron temperature along with the radial channel to determine the width and the boundary position of the magnetic island. According to the invention, the rapid distinguishing and high-precision positioning of a plurality of annular modulus seed magnetic islands can be realized without adding extra detection channels.

This invention discloses a hydrogen isotope permeation research device based on radio frequency plasma, belonging to the field of hydrogen isotope permeation research technology. The device includes a quartz tube, one end of which is connected to an inlet unit, and the other end has a fixed flange with a gas venting channel. A permeation tube is detachably and sealed to the fixed flange, and the inner cavity of the permeation tube is connected to a permeation flux detection unit. A tubular furnace corresponding to the permeation tube and a coupling coil electrically connected to a radio frequency generator are fitted around the quartz tube. The device also includes an in-situ reverse cleaning unit that can replace the permeation flux detection unit and a plasma diagnostic unit that can replace the permeation tube. This invention uses a radio frequency plasma source, which has high plasma density and a wide parameter adjustment range, effectively processing combined hydrogen isotopes. The in-situ reverse cleaning unit improves the permeation flux and operational stability. The modular structure provides strong engineering scalability and can support the systematic research and engineering development of ultrapermeation pumps.

Methods of monitoring arcing in a process chamber, processing chambers and monitoring apparatus are described. At least one of the angular or radial position of a magnetron is determined in the chamber relative to a reference location on a surface of the substrate using positional information from one or more motors. An arcing profile is generated comprising a plurality of arcing states measured based at least on the determined angular and / or radial position of the magnetron.

Embodiments disclosed herein include sensor devices and methods of using the sensor devices. In an embodiment, a sensor device comprises a substrate, a support extending up from the substrate, and a resonator mechanically coupled to the support. In an embodiment, the sensor device further comprises an antenna that is configured to electromagnetically couple with the resonator, wherein the antenna is connected to a transmission line in the substrate.

This application provides a multicolor instrument, a plasma diagnostic system, and a fusion reaction system. The multicolor instrument includes a first mirror assembly and an optical path box. The first mirror assembly is mounted on the inner wall of the optical path box via a lens flange. An angle exists between the axis of the first mirror assembly and the inner wall of the optical path box, and this angle is adjusted by tightening bolts passing through the lens flange. By mounting the first mirror assembly on the optical path box using a flange-bolt structure, a multicolor instrument with a simple structure, high reliability, flexibility, and ease of maintenance is obtained.

An intelligent plasma stabilization system for a fusion reactor, consisting of: a plasma diagnostic acquisition module for acquiring real-time plasma operating data from a variety of reactor sensors; a real-time plasma state analysis module for generating dynamic plasma state models based on the acquired operating data; an AI-based instability prediction module for predicting plasma instability events using machine learning algorithms; a dynamic magnetic field optimization module for autonomously adjusting the magnetic confinement parameters in response to predicted plasma instability events; and a central intelligent fusion control module for coordinating the operation of the plasma stabilization system to maintain plasma confinement stability in the fusion reactor.

The invention relates to the technical field of magnetic field measurement and plasma diagnosis, in particular to an anti-sputtering telescopic and deformable vacuum three-dimensional array magnetic field monitoring device and method. According to the technical scheme, the device comprises a power transmission device module, a rotating device module, a probe device module, a base and a signal transmission module, the power transmission device module is located in the base and is in nested connection with the rotating device module, the rotating device module is fixedly connected with the probe device module, and the signal transmission module is connected with the base; the power transmission device module is used for controlling the probe device module to move in the vertical or horizontal direction. According to the invention, the full-dimensional precise measurement of the three-dimensional magnetic field in the vacuum environment is realized, the measurement position and angle can be finely adjusted without moving the base, the measurement flexibility and the coverage range are greatly improved, good vacuum sealing performance and sputtering resistance are achieved, the operation is convenient, the positioning is precise, and the measurement efficiency and the data consistency are effectively improved.

The invention discloses an E / / B neutral particle analyzer detector for a Tokamak device, which belongs to the technical field of high-temperature plasma diagnosis and comprises a magnet structure for generating a specific magnetic field structure and a vacuum chamber structure for passage of charged ions. The electrode plate structures are used for guiding the charged ions to deflect; the detector main body structure is used for receiving the charged ions; the magnet structure is vertically fixed on a plane, the vacuum chamber structure is fixed and tightly attached in a gap of the magnet structure, the electrode plate structure is fixed in the vacuum chamber structure, and the detector main body structure is fixed in the vacuum chamber structure. While the target magnetic field structure and the energy detection range are met, the overall size and mass of the device are effectively optimized.

The invention discloses a method for measuring the service life of a first wall boron film of a Tokamak device, and belongs to the technical field of high-temperature plasma diagnos.The method comprises the steps that in the operation stage of a Tokamak plasma experiment, the mass change of a material is monitored in real time through a quartz crystal microbalance system located in a magnetic shadow area; based on monitoring data of the quartz crystal microbalance system, an evolution curve of accumulated mass change along with accumulated discharge time is drawn; performing local fitting and slope inspection on the slope of the evolution curve of the cumulative mass change along with the cumulative discharge time, and when the local fitting slope is remarkably changed, extracting plasma parameters under corresponding discharge conditions and confirming that the plasma parameters are in a stable state; and judging the end-of-life point of the first wall boron film based on the slope characteristic of the evolution curve of the cumulative mass change along with the cumulative discharge time. According to the invention, in-situ, real-time and accurate life measurement can be realized in the plasma discharge process.

The invention provides a laser plasma extreme ultraviolet light source ion debris measurement device and method, and relates to the technical field of plasma diagnosis, and the device comprises a signal processing device which is connected with an ion collection device and is used for processing an electric signal to obtain a processed signal; the data acquisition device is used for acquiring the processed signals; the calculation device is connected with the data acquisition device and is used for converting the acquired signal into an ion kinetic energy distribution spectrum and charge quantity information; the adjusting mechanism is used for realizing alignment of the ion debris measuring system and a plasma emission center; and the voltage source is used for providing bias voltage for the energy screening device. According to the invention, the defects of original ion debris measurement are improved, and kinetic energy distribution and charge state distribution of ion debris in an extreme ultraviolet light source system can be researched more deeply.

The invention provides an electric thruster beam plasma parameter characteristic diagnosis system and method, and relates to the field of plasma diagnosis, and the system comprises a vacuum chamber which is used for accommodating an electric thruster and providing a vacuum environment; the optical fiber signal acquisition module is arranged in the vacuum bin and is used for acquiring optical signals of beam plasma generated by the electric thruster from a plurality of angles; the image acquisition module is arranged outside the vacuum bin, is in light path connection with the optical fiber signal acquisition module and is used for receiving the optical signal and converting the optical signal into a two-dimensional image time sequence; and the data processing module is in communication connection with the image acquisition module and is used for processing the two-dimensional image time sequence so as to reconstruct four-dimensional distribution of parameters of the beam plasma. By means of optical fiber calibration, light splitting filtering and inversion processes, low-disturbance and low-cost multi-parameter synchronous diagnosis is achieved, and efficiency and resolution are improved.

The invention discloses an optical fiber interferometer precision adjustment vibration reduction platform for plasma density diagnosis, and belongs to the technical field of magnetic confinement nuclear fusion plasma diagnos.The optical fiber interferometer precision adjustment vibration reduction platform comprises symmetrically-arranged vibration reduction bases, supporting columns are arranged above the vibration reduction bases, a cross beam is arranged above the supporting columns, and the cross beam is arranged above the vibration reduction bases. Cantilever supports are symmetrically arranged on the lower surface of the cross beam, cylindrical coil fixers are arranged on the peripheries of the cantilever supports, Helmholtz coils are arranged on the cylindrical coil fixers, L-shaped collimator fixers are arranged on the cantilever supports, and optical fiber interferometer collimators are arranged on the L-shaped collimator fixers; according to the optical fiber interferometer precision adjustment vibration reduction platform for plasma density diagnosis, environment vibration can be effectively restrained, it is ensured that the optical fiber interferometer reaches the theoretical phase resolution, precision height adjustment and firm locking can be achieved, and the accuracy and reliability of plasma density measurement data are guaranteed.

Methods of monitoring arcing in a process chamber, processing chambers and monitoring apparatus are described. At least one of the angular or radial position of a magnetron is determined in the chamber relative to a reference location on a surface of the substrate using positional information from one or more motors. An arcing profile is generated comprising a plurality of arcing states measured based at least on the determined angular and / or radial position of the magnetron.

The invention discloses a coherent mode extraction method based on principal skewness analysis, and relates to the technical field of magnetic confinement nuclear fusion plasma diagnosis, and the method specifically comprises the following steps: S1, calculating Doppler translation according to a Doppler reflectometer system signal; s2, performing short-time Fourier transform on the obtained Doppler frequency shift to obtain a power spectrum matrix of the Doppler frequency shift; s3, constructing a co-skewness tensor according to a row vector of the power spectrum matrix, and solving a feature vector of the co-skewness tensor; and S4, performing noise suppression on the power spectrum matrix by using the feature vector of the co-skewness tensor. According to the method, the non-Gaussian features in Doppler frequency shift are extracted through high-order statistics, the limitation of a traditional method in noise suppression and transient mode detection is solved, the signal-to-noise ratio of coherent mode extraction is improved, and therefore the coherent mode can be displayed from background noise more effectively.

The invention discloses a magnetic confinement plasma instability spatial characteristic parameter acquisition method and system, and relates to the technical field of magnetic confinement nuclear fusion plasma diagnosis. The method comprises the following steps: collecting a diagnosis signal containing instability fluctuation information; performing spectral analysis on the signal to identify and extract a fundamental frequency and at least one harmonic frequency corresponding to instability; acquiring the circumferential rotation frequency of the plasma; based on the fundamental wave frequency, the harmonic wave frequency and the circumferential rotation frequency, an unstable circumferential modulus is obtained through calculation. According to the method, the internal mathematical relationship between the unstable harmonic frequency and the circumferential rotation frequency in the single-channel diagnosis signal is utilized, and the circumferential modulus can be directly obtained only by executing spectrum analysis and simple operation, so that the dependence of a traditional method on a multi-channel diagnosis system and a complex signal processing algorithm is effectively overcome; the diagnosis complexity and the data processing burden are remarkably reduced, and a new way is provided for convenient and efficient research on plasma instability.

A plasma diagnostic method and system are disclosed. The plasma diagnostic method includes: determining a proton source image based on a proton source; generating a first proton beam through the proton source; passing the first proton beam through a region to be diagnosed to form a second proton beam; receiving the second proton beam and determining a target image; constructing an optimal transport problem from the proton source image to the target image based on the proton source image and the target image; solving the optimal transport problem to obtain the optimal transport probability from the proton source image to the target image; and diagnosing the plasma in the region to be diagnosed based on the optimal transport probability. This invention's plasma diagnostic method has higher computational efficiency and overcomes the convergence difficulty caused by singularity in the computational equations under strong magnetic fields.

The invention provides a plasma distribution detection method based on a fluorescence enhanced developing method and a device and application thereof, and belongs to the technical field of plasma diagnosis and optical imaging. Comprising the following steps: (1) preparing a mixed solution containing fluorescent probe molecules and a polymethyl methacrylate composite film-forming material; (2) spin-coating the mixed solution on the surface of a target substrate to form a probe response film; (3) using low-temperature atmospheric pressure plasma jet to act on the mixed solution, and exciting response reaction of fluorescent molecules in the mixed solution; (4) irradiating the fluorescent film through ultraviolet light to induce the fluorescent film to emit a fluorescent signal; and (5) acquiring a fluorescence image by using an imaging system, and analyzing the intensity and distribution of the fluorescence image to realize the visual detection of the spatial characteristics of the plasma. The method has the remarkable advantages of non-contact, visualization, high spatial resolution and low cost, and has a wide industrial application prospect.

The invention discloses a plasma diagnosis and pulsed ion beam generation device for an ECR ion source, and the device comprises an ion source magnet which is used for providing a magnetic field for constraining electrons, and the middle part of the ion source magnet is provided with a through hole in the axial direction; the plasma arc cavity is inserted in the through hole of the ion source magnet, the injection end of the plasma arc cavity is provided with a gas inlet and a microwave feed inlet, and the leading-out end of the plasma arc cavity is provided with a beam leading-out hole; the insulating outer cylinder is arranged between the ion source magnet and the plasma arc cavity; the pulse coil is wound outside the plasma arc cavity and can translate along the axial direction, and the pulse coil is configured to form a magnetic field opposite to the magnetic field direction of the ion source magnet so as to weaken the peak intensity of the led-out magnetic field; and the insulating inner cylinder is arranged in the annular gap between the plasma arc cavity and the insulating outer cylinder and can translate along the axial direction, and the inner end of the insulating inner cylinder is connected with the pulse coil. According to the invention, the plasma diagnosis capability of the ECR ion source can be improved, and the intensity of the pulse beam led out by the ECR ion source can also be improved.

The invention discloses a surface thermocouple system suitable for an active water-cooling all-tungsten divertor of a magnetic confinement device, which relates to the field of plasma diagnosis of the magnetic confinement device and comprises a box-shaped supporting structure and a thermocouple assembly. Tungsten copper string pipes of the divertor are fixedly connected with the box-shaped supporting structure through fixing pins, and the thermocouple assembly is composed of a thermocouple probe, a pyrolytic graphite shell, a base, a screw, a nut, a spring washer, a fixing supporting plate and a lead and installed in cylindrical through holes between the adjacent tungsten copper string pipes and gaps between the tungsten copper string pipes and the box-shaped supporting structure. According to the invention, the surface thermocouple can be normally disassembled and maintained, and a direct means is provided for measuring the surface temperature of the active water-cooled all-tungsten divertor target plate.

The invention discloses a plasma optical image boundary marking method and device, and belongs to the field of plasma diagnosis. The method comprises the following steps: presetting a plurality of groups of line segments crossing a boundary on a plasma optical image, carrying out strip-shaped region sampling with the width of w pixels on each line segment, extracting a gray intensity value of a sampling point, and taking a point with the maximum intensity as a candidate boundary point; automatically dividing the candidate points into a left side set and a right side set according to the horizontal coordinate position, and performing curve fitting on the point sets on the two sides by adopting a cubic polynomial regression model; dynamically setting a threshold value by iteratively calculating a residual mean value and a standard deviation, and removing abnormal points until a termination condition is met; and finally, uniformly sampling in a vertical coordinate range to generate a smooth and continuous boundary curve and outputting a label file. According to the method, automatic and accurate identification of the plasma optical boundary is realized, subjective errors caused by manual labeling are eliminated, configuration reconstruction precision is improved, and the method is suitable for related research work of identification and reconstruction of the plasma optical boundary.

A long-gap pilot discharge channel temperature measurement system and method based on moire deflection belong to the technical field of high-voltage long-gap discharge plasma diagnosis, solve the problem of large error in pilot channel moire fringe imaging by using the traditional moire deflection optical path caused by the certain spacing between the grating and the discharge electrode in the traditional moire deflection optical path; by adopting the conjugate optical system composed of two first imaging lenses with the same parameters and the second imaging lens between the high-voltage discharge electrode and the Langley grating group in the moire deflection optical path, and making the pilot discharge channel image at the reference grating of the Langley grating group, the interference of the Langley grating group on the formation and development process of the pilot discharge channel is eliminated, the problem of large error in pilot channel moire fringe imaging by using the traditional moire deflection optical path is solved, and the accurate measurement of long-gap pilot discharge channel temperature can be realized.

The application discloses a scattering light intensity measurement uncertainty quantification method based on light spot stability analysis, and belongs to the technical field of plasma diagnosis. The method comprises the following steps: collecting a laser light spot image by using a surface array detector; performing adaptive background noise filtering and stray light removal based on connected region analysis on the light spot data to obtain high signal-to-noise ratio light spot intensity distribution data; accurately calculating the light spot centroid position of each pulse by using a weighted centroid method, and statistically analyzing the multi-pulse centroid positions to obtain a beam pointing stability parameter; combining the spatial matching relationship between the scattering volume and the collection system in the Thomson scattering light path to construct a quantitative model between the laser centroid offset and the scattering light collection efficiency, and then calculating the relative uncertainty of the transmission coefficient according to the error transfer principle. The application can effectively quantify the influence of laser pointing instability and light path vibration on the measurement accuracy without changing the original system structure.