Plasma feedback control system and method based on hydrogen-deuterium ratio real-time calculation

Abstract

The invention discloses a plasma feedback control system and method based on hydrogen-deuterium ratio real-time calculation, and relates to the field of Tokamak plasma control in nuclear fusion experiments, spectral data during plasma discharge are automatically collected through a high-precision spectrometer (SPF750), and a hydrogen-deuterium ratio is calculated in real time by using a plug-in written by a C # language. The hydrogen-deuterium ratio is calculated based on a Gaussian fitting function, and the real-time hydrogen-deuterium ratio is obtained by calculating the areas of a hydrogen peak and a deuterium peak. Calculation data are transmitted to a plasma control system (PCS) in real time through a PCIE reflection memory card, the PCS adjusts control parameters of an inflation system according to the received data, and real-time feedback control over the plasma hydrogen-deuterium ratio is achieved. Compared with the prior art, the method has the advantages of remarkable real-time performance and accuracy, can be used as an important control means in a Tokamak nuclear fusion experiment, remarkably improves the operation efficiency and stability of plasmas, and provides technical support for stable operation of high-parameter long pulses.

Description

Technical Field

[0001] The present invention relates to the field of Tokamak plasma control in nuclear fusion experiments, and particularly to a plasma feedback control system and method based on real-time calculation of the hydrogen-deuterium ratio. Background Art

[0002] Nuclear fusion energy, as a clean and efficient energy form, has great application potential. The Tokamak device is an important experimental equipment for realizing magnetic confinement nuclear fusion, and one of its core researches is the precise control of plasma. The hydrogen-deuterium ratio in plasma is one of the key parameters affecting the efficiency of nuclear fusion reactions. Traditional measurement and calculation of the hydrogen-deuterium ratio usually perform offline analysis on the original spectrum after the discharge ends, which cannot achieve real-time control, resulting in fluctuations and uncertainties in the plasma state.

[0003] During the operation of a magnetic confinement nuclear fusion device, the interaction between plasma and wall materials (Plasma-Wall Interaction, PWI) will cause the retention of fuel (hydrogen isotopes) on the surface of the first wall and divertor, directly affecting the properties of the materials and the recycling of fuel particles. In a Tokamak device that has undergone long-term hydrogen plasma discharge, a large amount of hydrogen is deposited on its limiter and inner wall. When deuterium discharge is used instead, these hydrogen will be released, making the plasma a hydrogen-deuterium mixture. Since a small amount of hydrogen comes from the recycling of the limiter and the wall, measuring the hydrogen-deuterium ratio is an important means to understand particle recycling. In addition, the level of the hydrogen-deuterium ratio is also an important parameter determining whether minority particle heating can be achieved.

[0004] With the development of spectral technology and data processing technology, it has become possible to collect and analyze spectral data in real time. However, existing spectral acquisition systems still have deficiencies in terms of real-time performance and accuracy, mainly because the original technology can only obtain the original spectrum of hydrogen-deuterium changes after the plasma discharge ends, and then perform offline calculation on the original spectrum, making it difficult to meet the requirements of the Tokamak device for real-time control of the hydrogen-deuterium ratio. Therefore, developing a feedback control system based on real-time calculation of the hydrogen-deuterium ratio has important theoretical and practical application values. Summary of the Invention

[0005] To overcome the defect that the traditional measurement and calculation of the hydrogen-deuterium ratio cannot be controlled in real time, the present invention provides a plasma feedback control system and method based on real-time calculation of the hydrogen-deuterium ratio. The spectral data during plasma discharge is automatically collected by a high-precision spectrometer (SPF750), and the hydrogen-deuterium ratio is calculated in real time by a plug-in written in C# language. The calculation of the hydrogen-deuterium ratio is based on a Gaussian fitting function, and the real-time hydrogen-deuterium ratio is obtained by calculating the areas of the hydrogen peak and the deuterium peak. The calculated data is transmitted to the plasma control system (PCS) in real time through a PCIE reflective memory card, and the PCS adjusts the control parameters of the gas filling system according to the received data to achieve real-time feedback control of the hydrogen-deuterium ratio of the plasma. The present invention can be used as an important control means in tokamak fusion experiments, significantly improving the operation efficiency and stability of the plasma, and providing technical support for high-parameter long-pulse stable operation.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A plasma feedback control system based on real-time calculation of the hydrogen-deuterium ratio, comprising a spectral automatic acquisition module, a real-time hydrogen-deuterium ratio calculation module, and a data transmission and feedback control module;

[0008] The spectral automatic acquisition module includes the EAST tokamak and the 750 spectrometer. The real-time hydrogen-deuterium ratio calculation module includes a computer connected to the 750 spectrometer. The data transmission and feedback control module includes an RFM, a PCS, and a gas filling system. The 750 spectrometer is a spectral automatic acquisition device. The EAST tokamak transmits the real-time spectrum during discharge to the 750 spectrometer. The computer connected to the 750 spectrometer performs real-time calculation of the hydrogen-deuterium ratio. The calculated hydrogen-deuterium ratio is transmitted to the PCS through the RFM to achieve real-time feedback control of the hydrogen-deuterium ratio. After receiving the signal, the gas filling system makes a decision on whether to add hydrogen gas, thereby realizing real-time control of the hydrogen-deuterium ratio at the boundary of the tokamak plasma during discharge. The PCS includes a PID controller for adjusting the controller parameters and control mode.

[0009] Further, the automatic acquisition of the plasma hydrogen-deuterium spectral line (in the 656.1 - 656.5 nm band) is realized by the SPF750 high-resolution spectrometer (resolution ≤ 0.02 nm);

[0010] Further, based on the C# language plug-in, the Gaussian fitting of the hydrogen-deuterium double peaks and the calculation of the integral area ratio are completed within a 10 ms cycle;

[0011] Further, a hardware-level data synchronization mechanism of the PCIE reflective memory card is adopted to achieve microsecond-level cross-system transmission of the calculation results, breaking through the bottleneck of the hundred-millisecond-level delay of the traditional TCP / IP protocol;

[0012] Furthermore, after receiving the hydrogen-deuterium ratio data at the PCS control end, the data is sent to the gas filling system, thereby adjusting the control parameters to control the hydrogen-deuterium ratio in the plasma in real time;

[0013] Furthermore, an overall system is built to ensure the success rate of signal transmission and realize real-time feedback control of the hydrogen-deuterium ratio during plasma discharge.

[0014] Furthermore, the SPF750 spectrometer adopts a back-illuminated CCD detector, combined with a temperature-controlled grating (stability ±0.001nm / °C), and can still maintain a signal-to-noise ratio of >50dB at a flux of 10^6 photons / second.

[0015] Furthermore, the real-time calculation of the hydrogen-deuterium ratio is based on a Gaussian fitting function, which accurately finds the positions of the hydrogen peak and the deuterium peak, defines integral broadening, and calculates the areas of the hydrogen peak and the deuterium peak for comparison to obtain the hydrogen-deuterium ratio.

[0016] Furthermore, the PCIE memory card uses the RFM network to transmit data, which has the advantages of high speed, low latency and high bandwidth, and can meet the needs of real-time data transmission.

[0017] Furthermore, the plasma feedback control system includes a signal transmission success rate guarantee measure to ensure the real-time and accuracy of data transmission.

[0018] Furthermore, the signal processing technology includes filtering, denoising, etc. to improve the reliability and practicality of the data. And the processing algorithm is optimized to improve the calculation efficiency and accuracy.

[0019] Furthermore, a real-time monitoring interface of hydrogen-deuterium ratio-plasma performance was established to visualize the dynamic spectrum curve (refresh rate 100 Hz) and the real-time hydrogen-deuterium ratio trend chart.

[0020] The present invention also provides a plasma feedback control method based on real-time calculation of hydrogen-deuterium ratio, which builds a real-time feedback control system of hydrogen-deuterium ratio through automatic spectrum acquisition to achieve real-time monitoring and control of hydrogen-deuterium ratio at the boundary of tokamak plasma, including the following steps:

[0021] Step 1: Automatically collect spectrum, using SPF750 spectrometer to automatically collect spectrum data of plasma during plasma discharge;

[0022] Step 2: Real-time calculation of hydrogen-deuterium ratio is performed during the automatic spectrum acquisition in the spectrometer supporting software through a plug-in written in C# language to achieve real-time calculation of hydrogen-deuterium ratio;

[0023] Step 3: Perform data transmission and feedback control, build a plasma feedback control system, and perform feedback control.

[0024] Beneficial effects:

[0025] Compared with the prior art, the present invention has the following beneficial technical effects:

[0026] 1. By automatically collecting spectral data and calculating the hydrogen-deuterium ratio in real time, the present invention can achieve real-time monitoring and control of the hydrogen-deuterium ratio at the plasma boundary, overcoming the limitation that the traditional method can only perform off-line analysis after the discharge ends.

[0027] 2. The present invention uses a PCIE memory card to write data into memory nodes through a reflective memory network. After the hardware logic of the reflective memory card detects new data being written, it will automatically send the data to the reflective memory cards of other nodes through a high-speed network (optical fiber). The data is directly transmitted by hardware without passing through the operating system or network protocol stack, ensuring the real-time nature of data transmission.

[0028] 3. The establishment of the plasma feedback control system includes measures to ensure the success rate of signal transmission, ensuring the real-time nature and accuracy of data transmission. The signal processing algorithm is optimized to improve the calculation efficiency and accuracy, further enhancing the real-time nature and accuracy of the system.

[0029] 4. This system can be used as an important control means in tokamak fusion experiments. By real-time monitoring and controlling the hydrogen-deuterium ratio, it significantly improves the operation efficiency and stability of the tokamak device, providing technical support for the high-parameter long-pulse stable operation of the plasma. Brief Description of the Drawings

[0030] Figure 1 It is a system architecture diagram of the plasma feedback control system based on real-time calculation of the hydrogen-deuterium ratio of the present invention, showing the overall process of automatic spectral collection, hydrogen-deuterium ratio calculation, data transmission and feedback control;

[0031] Figure 2(a) is a flowchart of spectral collection, real-time calculation and sending to the PCS;

[0032] Figure 2(b) is a graph of the real-time hydrogen-deuterium ratio calculation results based on the Gaussian fitting function, enabling real-time and dynamic monitoring of the hydrogen-deuterium ratio during the discharge process;

[0033] Figure 3 It is a schematic diagram of the PCS control end receiving the hydrogen-deuterium ratio data, transmitting the data to the data display interface for real-time display and performing subsequent operations. PCHD is the signal name transmitted to the PCS (plasma control system), and acis10150069 is the signal channel transmitted to the data display interface. Detailed Embodiment

[0034] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] As Figure 1 shown, the plasma feedback control system based on real-time calculation of the hydrogen-deuterium ratio of the present invention includes a spectral automatic acquisition module, a hydrogen-deuterium ratio real-time calculation module, and a data transmission and feedback control module.

[0036] The spectral automatic acquisition module includes the EAST Tokamak and a 750 spectrometer. The hydrogen-deuterium ratio real-time calculation module includes a computer (PC) connected to the 750 spectrometer. The data transmission and feedback control module includes an RFM (Reflective Memory Network), a PCS, and a gas injection system.

[0037] Among them, the 750 spectrometer is a spectral automatic acquisition device, and a computer connected to the 750 spectrometer is used for real-time calculation of the hydrogen-deuterium ratio (HD ratio). The PCS (Plasma Control System) is a signal receiving end, and after processing, it sends the hydrogen-deuterium ratio to the gas injection system through an electrical signal to achieve real-time feedback control of the hydrogen-deuterium ratio. After receiving the signal, the gas injection system makes a decision on whether to inject hydrogen, thereby realizing real-time control of the hydrogen-deuterium ratio at the boundary of the Tokamak plasma during discharge.

[0038] The EAST Tokamak transmits the real-time spectrum during discharge to the 750 spectrometer. The computer connected to the 750 spectrometer performs real-time calculation of the hydrogen-deuterium ratio (HD ratio). The calculated hydrogen-deuterium ratio (HD ratio) is transmitted to the PCS through the RFM. The PCS also uses the RFM to transmit the signal of whether hydrogen needs to be injected to the gas injection system. The amount of gas injection is represented by the magnitude of the voltage. The change in the hydrogen-deuterium ratio during discharge due to gas injection is finally shown in Figure 3 . The PCS includes a PID controller for regulating the controller parameters and control mode.

[0039] Specifically, the spectral automatic acquisition module automatically acquires spectral data during plasma discharge using a high-precision spectrometer (SPF750 spectrometer).

[0040] Specifically, the hydrogen-deuterium ratio real-time calculation module includes a plug-in written in C# language added to the spectrometer supporting software for real-time calculation of the hydrogen-deuterium ratio. In the plug-in written in code, the calculation of the hydrogen-deuterium ratio is based on a Gaussian fitting function to accurately find the position of the deuterium peak, and the highest peak is found between wavelengths of 656.0~656.3nm. The wavelength of the hydrogen peak is approximately equal to the wavelength of the deuterium peak plus the calculation of the Rydberg constant based on the hydrogen atom emission spectrum plus , , representing the wavelength distance of the electronic transition spectral lines between the deuterium peak and the hydrogen peak, defining the broadening value of the integral area as 0.26 nm, then calculating the areas of the hydrogen peak and the deuterium peak, and calculating the real-time hydrogen-deuterium ratio.

[0041] The wavelength distance of the electronic transition spectral lines between the deuterium peak and the hydrogen peak The calculation formula is:

[0042] , , ;

[0043] Among them, is the Rydberg constant (CODATA recommended value) under the assumption of infinite nuclear mass; is the electron rest mass ( ); and are the masses of the hydrogen nucleus (proton) and the deuterium nucleus respectively, , ; and are the effective Rydberg constants of hydrogen (H) and deuterium (D) respectively.

[0044] Define the broadening value of the integral area as 0.26 nm, then calculate the integral areas of the hydrogen peak and the deuterium peak, and calculate the real-time hydrogen-deuterium ratio.

[0045] Specifically, the data transmission and feedback control module transmits the real-time hydrogen-deuterium ratio data obtained through the PCIE reflective memory card to the PCS (plasma control system) in real time, and can achieve low-latency and high-bandwidth data sharing among multiple nodes. Its working principle is based on reflective memory technology, which can ensure the real-time transmission of hydrogen-deuterium ratio data and provide technical support for the real-time monitoring and control of the plasma state.

[0046] After receiving the real-time calculated hydrogen-deuterium ratio data through the RFM reflective memory at the PCS control end, the received data is converted into an electrical signal and transmitted to the gas filling system, and the control parameters of the gas filling system are adjusted by adding hydrogen to adjust the hydrogen-deuterium ratio during plasma discharge in real time, ensuring that it fluctuates within an appropriate range, so as to operate the plasma feedback control system using the real-time hydrogen-deuterium ratio.

[0047] Preferably, the construction of the plasma feedback control system includes measures to ensure the success rate of signal transmission. Single-channel signals are transmitted separately through optical fibers to avoid chaos caused by sharing signal paths, and to ensure the real-time and accuracy of data transmission.

[0048] In terms of the processing of the original spectral signals, advanced signal processing techniques, such as filtering and denoising, are introduced to improve the reliability and practicality of the data. At the same time, the real-time calculation algorithm for the hydrogen-deuterium ratio is optimized by adding Gaussian fitting to improve the calculation efficiency and accuracy.

[0049] The present invention also provides a plasma feedback control method based on the real-time calculation of the hydrogen-deuterium ratio. By automatically collecting spectra, a real-time feedback control system for the hydrogen-deuterium ratio is built to realize the real-time monitoring and control of the hydrogen-deuterium ratio at the boundary of the Tokamak plasma, including the following steps:

[0050] Step 1: Automatically collect spectra. Use the SPF750 spectrometer to automatically collect the spectral data of the plasma during the plasma discharge.

[0051] Step 2: Perform real-time calculation of the hydrogen-deuterium ratio. During the automatic spectrum collection, in the software supporting the spectrometer, through a plug-in written in the C# language, the real-time calculation of the hydrogen-deuterium ratio is realized.

[0052] Specifically, the calculation of the hydrogen-deuterium ratio is based on the Gaussian function. By calculating and comparing the areas of the hydrogen peak and the deuterium peak, the hydrogen-deuterium ratio is obtained.

[0053] The mathematical formula of the Gaussian function is , where is the amplitude, representing the height of the peak; is the mean value, representing the center position of the peak; is the standard deviation, representing the width of the peak; is the independent variable, representing the wavelength, and exp() represents the exponential function.

[0054] As shown in Figure 2(b), it is the real-time hydrogen-deuterium ratio calculation result diagram based on the Gaussian fitting function. During the discharge process, real-time and dynamic monitoring of the hydrogen-deuterium ratio can be realized.

[0055] Integrate the fitted Gaussian function within the extended interval to calculate the areas of the hydrogen peak and the deuterium peak:

[0056] Hydrogen peak integration interval: ;

[0057] Deuterium peak integration interval: ;

[0058] Integration formula: ; ;

[0059] Where and are the Gaussian functions of the hydrogen peak and the deuterium peak respectively, and are the wavelengths corresponding to the peak values of the hydrogen peak and the deuterium peak respectively, is the defined broadening value, i.e., the length of the integration interval, which is the optimal integration interval obtained through comparative calculations. and are the Gaussian functions of the hydrogen peak and the deuterium peak respectively. is the wavelength. and are the area integrations of the hydrogen peak and the deuterium peak respectively.

[0060] The hydrogen-deuterium ratio has the following calculation formula: .

[0061] Step 3: Perform data transmission and feedback control to build a plasma feedback control system:

[0062] The data transmission and feedback control include: transmitting the calculated hydrogen-deuterium ratio data to the PCS control end in real time through a PCIE reflective memory card using a reflective memory network (RFM). Reflective memory (RFM) is a shared memory technology that allows multiple nodes (such as computers or controllers) to access the same memory area through a high-speed network. Each node has a local memory. When a node writes data, the data will automatically "reflect" into the memories of other nodes, thus achieving real-time sharing of data.

[0063] The reflective memory card ensures the real-time synchronization of the memory contents of all nodes through a hardware mechanism, and the latency of data writing and reading is extremely low (usually at the microsecond level).

[0064] The data transmission system is shown in Figure 2(a). The real-time calculated hydrogen-deuterium ratio is transmitted to the PCS, and the PCS then feeds back to the gas filling system, ultimately achieving real-time feedback control of hydrogen and deuterium.

[0065] Building a plasma feedback control system includes:

[0066] After receiving the hydrogen-deuterium ratio data at the PCS control end, it is displayed in real time through a data display interface, as Figure 3 shown.

[0067] The PCS adjusts the control parameters of the gas filling system according to the received real-time hydrogen-deuterium ratio data, and adjusts the boundary hydrogen-deuterium ratio in the plasma in real time to ensure that it fluctuates within a suitable range.

[0068] The plasma feedback control system includes measures to ensure the success rate of signal transmission to ensure the real-time and accuracy of data transmission.

[0069] Preferably, in the above steps, signal processing and algorithm optimization are performed, including:

[0070] Introduce advanced signal processing techniques to denoise the original spectrum. Use median filtering to smooth the spectral intensity data and remove noise. At the same time, perform baseline correction by subtracting the minimum value of the spectrum to correct the baseline. This is to enhance the reliability and practicality of the data.

[0071] Optimize the real-time calculation algorithm for the hydrogen-deuterium ratio to improve the calculation efficiency and accuracy.

Claims

1. A plasma feedback control system based on real-time calculation of the hydrogen-deuterium ratio, characterized in that It includes a spectrum automatic acquisition module, a real-time hydrogen-deuterium ratio calculation module, and a data transmission and feedback control module; The spectrum automatic acquisition module includes the EAST Tokamak and a 750 spectrometer. The real-time hydrogen-deuterium ratio calculation module includes a computer connected to the 750 spectrometer. The data transmission and feedback control module includes an RFM, a PCS, and a gas filling system. The 750 spectrometer is a spectrum automatic acquisition device. The EAST Tokamak transmits the real-time spectrum during discharge to the 750 spectrometer. The computer connected to the 750 spectrometer performs real-time calculation of the hydrogen-deuterium ratio. The calculated hydrogen-deuterium ratio is transmitted to the PCS through the RFM to achieve real-time feedback control of the hydrogen-deuterium ratio. After receiving the signal, the gas filling system makes a decision on whether to fill hydrogen, thereby realizing real-time control of the hydrogen-deuterium ratio at the boundary of the Tokamak plasma during discharge. The PCS includes a PID controller for regulating the controller parameters and control mode.

2. The plasma feedback control system based on real-time calculation of hydrogen-deuterium ratio according to claim 1, characterized in that, The real-time hydrogen-deuterium ratio calculation module includes a plug-in written in C# language added to the spectrometer supporting software for real-time calculation of the hydrogen-deuterium ratio.

3. The plasma feedback control system based on real-time calculation of hydrogen-deuterium ratio according to claim 2, wherein In the plugin, the calculation of the hydrogen-deuterium ratio is based on a Gaussian fitting function to accurately locate the position of the deuterium peak. The highest peak is searched for between wavelengths of 656.0 - 656.3 nm. The wavelength of the hydrogen peak is approximately equal to the wavelength of the deuterium peak plus the wavelength distance of the electronic transition spectral lines between the deuterium peak and the hydrogen peak, calculated based on the emission spectrum of hydrogen atoms and the calculation of the Rydberg constant. , , representing the wavelength distance of the electronic transition spectral lines between the deuterium peak and the hydrogen peak. The broadening value of the integration area is defined as 0.26 nm. Then, the areas of the hydrogen peak and the deuterium peak are calculated to obtain the real-time hydrogen-deuterium ratio.

4. The plasma feedback control system based on real-time calculation of hydrogen-deuterium ratio according to claim 3, wherein, Wavelength distance between the electronic transition spectral lines of deuterium peak and hydrogen peak The calculation formula is as follows: 、 、 ； Among them, is the Rydberg constant under the assumption of infinite nuclear mass; is the rest mass of the electron; and are the masses of the hydrogen nucleus (proton) and deuterium nucleus respectively, , ; and are the effective Rydberg constants of hydrogen and deuterium respectively.

5. The plasma feedback control system based on real-time calculation of hydrogen-deuterium ratio according to claim 4, characterized in that, Define the broadening value of the integration area as 0.26 nm, and then calculate the integration areas of the hydrogen peak and deuterium peak to calculate the real-time hydrogen-deuterium ratio.

6. The plasma feedback control system based on real-time calculation of hydrogen-deuterium ratio according to claim 1, wherein The data transmission and feedback control module transmits the real-time obtained hydrogen-deuterium ratio data to the PCS in real time through a PCIE reflection memory card; After receiving the real-time calculated hydrogen-deuterium ratio data through the RFM reflection memory at the PCS control end, the received data is converted into an electrical signal and transmitted to the gas filling system. The control parameters of the gas filling system are adjusted by filling hydrogen to adjust the hydrogen-deuterium ratio during plasma discharge in real time, ensuring that it fluctuates within a suitable range, thereby operating the plasma feedback control system using the real-time hydrogen-deuterium ratio.

7. The plasma feedback control system based on real-time calculation of the hydrogen-deuterium ratio according to claim 1, wherein The plasma feedback control system includes measures to ensure the success rate of signal transmission. It uses separate optical fiber transmission for single-channel signals to avoid chaos caused by sharing signal paths and ensure the real-time and accurate data transmission.

8. A plasma feedback control method based on real-time calculation of the hydrogen-deuterium ratio, characterized in that, Build a real-time feedback control system for the hydrogen-deuterium ratio through spectrum automatic acquisition to realize real-time monitoring and control of the hydrogen-deuterium ratio at the boundary of the Tokamak plasma, including the following steps: Step 1: Perform spectrum automatic acquisition. Use the SPF750 spectrometer to automatically acquire the spectrum data of the plasma during plasma discharge. Step 2: Perform real-time calculation of the hydrogen-deuterium ratio. During the automatic spectrum acquisition, in the spectrometer supporting software, use a plug-in written in C# language to realize real-time calculation of the hydrogen-deuterium ratio. Step 3: Perform data transmission and feedback control. Build a plasma feedback control system for feedback control.

9. The plasma feedback control method based on real-time calculation of the hydrogen-deuterium ratio according to claim 8, characterized in that, In the above Step 2, the calculation of the hydrogen-deuterium ratio is based on the Gaussian function. By calculating and comparing the areas of the hydrogen peak and deuterium peak, the hydrogen-deuterium ratio is obtained; The mathematical formula of the Gaussian function is , where is the amplitude, representing the height of the peak; is the mean, representing the central position of the peak; is the standard deviation, representing the width of the peak; is the independent variable, representing the wavelength, and exp() represents the exponential function; Integrate the fitted Gaussian function within the extended interval to calculate the areas of the hydrogen peak and deuterium peak: Hydrogen peak integration range: ; Deuterium peak integration interval: ; Integration formula: ; ; Among them, and are the Gaussian functions of the hydrogen peak and the deuterium peak respectively, and are the wavelengths corresponding to the peak values of the hydrogen peak and the deuterium peak respectively, is the defined broadening value, that is, the integral interval length, which is the best integral interval obtained through comparative calculation, and are the Gaussian functions of the hydrogen peak and the deuterium peak respectively, is the wavelength, and are the area integrals of the hydrogen peak and the deuterium peak respectively; Hydrogen-deuterium ratio The calculation formula is as follows: .

10. The plasma feedback control method based on real-time calculation of hydrogen-deuterium ratio according to claim 9, characterized in that The data transmission and feedback control in step 3 include: transmitting the calculated hydrogen-deuterium ratio data to the PCS control end in real time using RFM through the PCIE reflective memory card; the reflective memory card ensures real-time synchronization of the memory contents of all nodes through a hardware mechanism, and the latency of data writing and reading is at the microsecond level; building a plasma feedback control system includes: after receiving the hydrogen-deuterium ratio data at the PCS control end, displaying it in real time through a data display interface, and the PCS adjusts the control parameters of the gas filling system according to the received real-time hydrogen-deuterium ratio data, and adjusts the boundary hydrogen-deuterium ratio in the plasma in real time to ensure that it fluctuates within a suitable range.

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