A self-calibration loss fast ion probe system for deuterium-tritium fusion experiment

By introducing calibration lamps and calibration steps into the loss fast ion detector and combining them with an automatic control process, the problems of scintillator position calibration and image transfer system focusing were solved, enabling high-precision data processing in magnetic confinement fusion experiments.

CN120878301BActive Publication Date: 2026-05-12UNIV OF SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF SCI & TECH OF CHINA
Filing Date
2025-07-23
Publication Date
2026-05-12

AI Technical Summary

Technical Problem

In magnetic confinement fusion experiments, the position of the scintillator in the loss fast ion detector is difficult to calibrate effectively, and the focusing of the image transfer system cannot be determined, which makes it impossible to guarantee the accuracy of data processing.

Method used

Design a self-calibrating loss fast ion detector system, including a calibration lamp, a calibration step, an ultra-high vacuum feedthrough connector and a host computer. The system achieves automatic focusing and calibration of the image through an automatic control process. The calibration lamp and calibration step are used to determine the position of the scintillator region and the image sharpness before each experiment.

Benefits of technology

It enables automatic calibration of the scintillator position and imaging sharpness before each experiment of the magnetic confinement fusion device, ensuring the accuracy and reliability of subsequent data processing and avoiding position and focus shifts caused by vibration.

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Abstract

The application discloses a self-calibration loss fast ion probe system for deuterium-tritium fusion experiment, and relates to the technical field of magnetic confinement fusion plasma diagnosis, which comprises a vacuum flange for being installed on a magnetic confinement fusion device, and further comprises: a vacuum pipeline installed at a corresponding window of the vacuum flange, wherein one end of the vacuum pipeline away from the window is provided with a vacuum window; a probe shaft pipeline installed in the vacuum pipeline; a probe installed at one end of the probe shaft pipeline extending into a vacuum chamber of the magnetic confinement fusion device and used for generating an optical signal, wherein a scintillator plate, a calibration lamp and a calibration step are installed in the probe; the self-calibration loss fast ion probe system for deuterium-tritium fusion experiment is characterized in that the calibration lamp is installed in the probe, and the calibration lamp is a patch LED type, so that the volume is small, and the imaging of an image transmission system on the scintillator in the probe is not blocked.
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Description

Technical Field

[0001] This invention relates to the field of magnetic confinement fusion plasma diagnostics, specifically to a self-calibrated loss fast ion detector system for deuterium-tritium fusion experiments. Background Technology

[0002] Current magnetic confinement fusion experiments primarily rely on neutral beam injection and ion cyclotron heating to assist plasma heating. The high-energy particles generated by these auxiliary heating systems are crucial for heating efficiency and fusion reaction rate. Therefore, research on the interaction between high-energy particles and magnetohydrodynamic instabilities in the plasma is of great significance. Currently, fast ion loss detectors are mainly used to obtain information such as the energy and projection angle of the lost fast ions.

[0003] Current fast ion loss detectors typically use high-speed cameras to image the detector's interior, which is completely shaded. When fast ion loss occurs during the experiment, the scintillator inside the detector is struck by fast ions, forming a corresponding bright spot. By analyzing the coordinates of the bright spot on the scintillator, the energy and launch angle of the fast ion can be obtained, and the trajectory of the lost fast ion can be calculated. Therefore, in subsequent data processing, it is necessary to determine the position of the scintillator region in the high-speed camera image, thereby determining the coordinates of the bright spot in the scintillator coordinate system. Currently, to avoid radiation safety accidents, all major magnetic confinement fusion devices prohibit access to the experimental setup during experiments, and each round of experiments generally lasts for several months. During future deuterium-tritium fusion experiments, access to the vicinity of the experimental setup may be prohibited for several years for debugging. Therefore, the fast ion loss detectors installed on these devices can only be manually illuminated externally during initial installation, and a calibration image captured by a camera can be used for later data processing.

[0004] The current problem with lossy fast ion detectors is that:

[0005] 1. Ineffective Calibration of Scintillator Position: During experiments, magnetic confinement fusion devices are subjected to strong electromagnetic forces that cause vibrations. The fast ion detector, installed on the magnetic confinement fusion device, is also affected by these vibrations, resulting in frequent shifts in the scintillator's position within the high-speed camera's field of view over several months of experimentation. Therefore, a single manual calibration using external lighting at the initial stage of detector installation is insufficient, and the accuracy of subsequent data processing cannot be guaranteed.

[0006] 2. The focusing situation of the image transfer system cannot be effectively determined: Because the scintillator of the fast ion detector is a pure white rectangular plate with its edge perpendicular to the detector's inner wall, the upper edge of the detector's inner wall is not at the same imaging distance as the scintillator in the image transfer system. Therefore, the image transfer system lacks a reference point when focusing on the scintillator. Even with external illumination during the commissioning of the image transfer system, the image sharpness cannot be determined, making accurate focusing on the scintillator impossible. Even if the initial focusing is accurate, it is difficult to avoid focus shift caused by vibrations of the magnetic confinement fusion device. Summary of the Invention

[0007] The purpose of this invention is to provide a self-calibrated loss fast ion detector system for deuterium-tritium fusion experiments, in order to overcome the shortcomings of the prior art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a self-calibration loss fast ion detector system for deuterium-tritium fusion experiments, comprising a vacuum flange for installation on a magnetic confinement fusion device, and further comprising: a vacuum pipe installed at a corresponding window on the vacuum flange, with a vacuum viewing window installed at the end of the vacuum pipe away from the window; a probe shaft pipe installed inside the vacuum pipe; and a detector installed at the end of the probe shaft pipe extending into the vacuum chamber of the magnetic confinement fusion device, for generating an optical signal. The detector contains a scintillator plate, a calibration lamp, and a calibration step, and the calibration lamp is activated by lighting. The image can be projected onto the scintillator plate. The calibration step is installed on the edge of the scintillator plate, and the height of the calibration step is slightly higher than the plane of the scintillator plate. It is used to distinguish the scintillator plate area and the calibration step area in the calibration image and to serve as a focusing reference for the image transfer system. The image transfer system is used to capture and image the light signals generated inside the detector. The ultra-high vacuum feedthrough connector is used to realize the exchange of electrical signals between the vacuum environment and the external environment. The host computer is electrically connected to the image transfer system, the ultra-high vacuum feedthrough connector, and the calibration lamp to control the coordinated operation of the image transfer system, the ultra-high vacuum feedthrough connector, and the calibration lamp.

[0009] Preferably, the light from the calibration lamp is projected onto the scintillator plate to generate a calibration light signal, and the fast ions lost in the magnetic confinement fusion device strike the scintillator plate to generate an experimental light signal.

[0010] Preferably, the calibration lamp is a surface-mount LED, and its emission wavelength is consistent with that of the scintillator board, so as to avoid additional aberrations in the image transmission system.

[0011] Preferably, the image transmission system includes an imaging lens and a high-speed camera, wherein the high-speed camera is mounted at the vacuum window and the imaging lens is mounted at the lens mount of the high-speed camera.

[0012] Preferably, the ultra-high vacuum feedthrough connector is mounted on the peripheral side of the vacuum pipe to enable electrical signal exchange while ensuring an extremely low vacuum leakage rate.

[0013] Preferably, the calibration lamp is connected to the host computer via a calibration lamp signal line, and the calibration lamp signal line is led out through the wiring hole of the detector and routed outside the probe shaft channel to avoid obstructing the optical path of the image transmission system.

[0014] Preferably, the calibration lamp signal line is soldered to the metal contacts of the ultra-high vacuum power connector.

[0015] Preferably, the probe shaft channel is hollow inside to block external stray light interference, so that during the experiment, only the scintillation bright spot generated by fast ions hitting the scintillator plate is displayed in the field of view of the high-speed camera; during calibration, only the calibration light signal is displayed in the field of view of the high-speed camera.

[0016] Preferably, the workflow of the host computer controlling each component is as follows: before the experiment begins, the host computer controls the calibration lamp to light up, and the high-speed camera focuses on the edge line of the calibration step and takes a calibration image; during the experiment, the high-speed camera takes a picture of the scintillation pattern on the scintillator plate; after the experiment, the calibration image is used to perform calibration processing on the experimental image data.

[0017] In the above technical solution, the self-calibrated loss fast ion detector system for deuterium-tritium fusion experiments provided by the present invention has the following effects:

[0018] 1. A calibration lamp, a small, surface-mount LED, is installed inside the detector, ensuring it does not obstruct the image transfer system's imaging of the scintillator within the detector. The calibration lamp's emission wavelength matches that of the scintillator used in the detector, preventing unintended aberrations from occurring when the image transfer system, specifically designed for the scintillator's emission wavelength, images the calibration image. Clear imaging of the calibration image by the image transfer system means it also clearly images the scintillator pattern in the experiment. Before each experiment, the calibration lamp illuminates the scintillator region in the detector, determining its location. In subsequent data processing, a scintillator coordinate system can be established based on the scintillator's position in the calibration image, allowing the determination of the bright spot coordinates in the experimental image data. Furthermore, the energy, launch angle, and loss trajectory of fast ions can be obtained.

[0019] 2. The calibration lamp signal line is led out through a wire hole on the detector to the outside of the probe shaft channel, thus not obstructing the optical path of the image transmission system. The calibration lamp signal line outside the probe shaft channel is led out to the vacuum environment of the magnetic confinement fusion device through an ultra-high vacuum feedthrough connector on the vacuum pipeline and connected to the host computer. The ultra-high vacuum feedthrough connector enables electrical signal exchange between the vacuum environment of the magnetic confinement fusion device and the external environment while ensuring an extremely low vacuum leakage rate. The connection between the calibration lamp and the host computer allows for programmable control of the calibration lamp.

[0020] 3. The self-calibration loss fast ion detector has a calibration step inside. The calibration step is located at the edge of the scintillator and exposed within the imaging field of view of the image transfer system. The calibration step is slightly higher than the scintillator plane, used to distinguish the scintillator region and the calibration step region in the calibration image. Since the calibration step and the scintillator are almost the same height, the sharpness of the image transfer system's current imaging of the scintillator can be determined based on the sharpness of the calibration step edge before capturing the calibration image. Before each experiment, the host computer first controls the high-speed camera to focus on the calibration step edge, thus ensuring the sharpness of the calibration image and scintillator pattern captures in this experiment.

[0021] 4. The self-calibration loss fast ion detector system achieves automatic image focusing and calibration through an automated control process. Before each experiment, the magnetic confinement fusion device sends a countdown signal through the experimental network. Upon receiving the countdown signal, the host computer controls the calibration lamp inside the detector to illuminate the scintillator and calibration steps. The host computer then controls the high-speed camera to focus on the edge of the calibration steps and capture a calibration image. The host computer then controls the calibration lamp to turn off. When the experiment countdown ends, a trigger signal to start the experiment is sent. The high-speed camera starts and captures the scintillation pattern on the scintillator. The experiment ends. The host computer controls the high-speed camera to stop capturing images. The host computer then waits for the countdown signal for the next experiment. The calibration image from this experiment can be used to calibrate the image data for this experiment and further process the data. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0024] Figure 2 A schematic diagram provided for an embodiment of the present invention;

[0025] Figure 3 An overall plan view provided for an embodiment of the present invention;

[0026] Figure 4 A perspective view of the detector provided in an embodiment of the present invention;

[0027] Figure 5 A perspective view of the detector cross-section provided in an embodiment of the present invention;

[0028] Figure 6 A flowchart illustrating the self-calibration loss fast ion detector system provided in this embodiment of the invention;

[0029] Figure 7 This is a schematic diagram of calibration images provided in an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of experimental data provided in an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the calibration software provided in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Detector; 1(1) Scintillator plate; 1(2) Collimator; 1(3) Calibration step; 1(4) Calibration lamp; 1(5) Wiring hole; 2. Imaging lens; 3. High-speed camera; 4. Host computer; 5. Calibration lamp signal line; 6. Ultra-high vacuum power connector; 7. High-speed camera signal line; 8. Probe shaft pipe; 9. Vacuum flange of magnetic confinement fusion device; 10. Vacuum pipe; 11. Vacuum window. Detailed Implementation

[0034] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0035] Please see Figure 1-9 The present invention provides a self-calibration loss fast ion detector 1 system for deuterium-tritium fusion experiments, including detector 1, scintillator plate 1 (1), collimator 1 (2), calibration step 1 (3), calibration lamp 1 (4), wiring hole 1 (5), imaging lens 2, high-speed camera 3, host computer 4, calibration lamp signal line 5, ultra-high vacuum feedthrough connector 6, high-speed camera signal line 7, probe shaft pipe 8, magnetic confinement fusion device vacuum flange 9, vacuum pipe 10, and vacuum window 11;

[0036] The vacuum flange is installed on the magnetic confinement fusion device, and the vacuum pipe 10 is installed at the corresponding window on the vacuum flange. A vacuum window 11 is installed at the end of the vacuum pipe 10 away from the window. Since the vacuum window 11 is installed at the rear end of the vacuum pipe 10, the vacuum pipe 10 and the vacuum window 11 are used to ensure the internal vacuum environment. The probe shaft pipe 8 is installed inside the vacuum pipe 10. The detector 1 is installed at the end of the probe shaft pipe 8 that extends into the vacuum chamber of the magnetic confinement fusion device and is used to generate light signals. The detector 1 is equipped with a scintillator plate 1 (1), a calibration lamp 1 (4), and a calibration step 1 (3). When the calibration lamp 1 (4) is turned on... The light can be projected onto the scintillator plate 1 (1). The calibration step 1 (3) is installed on the edge of the scintillator plate 1 (1). The height of the calibration step 1 (3) is slightly higher than the plane of the scintillator plate 1 (1). It is used to distinguish the area of ​​the scintillator plate 1 (1) and the area of ​​the calibration step 1 (3) in the calibration image and to serve as a focusing reference for the image transfer system. The image transfer system is used to capture and image the light signal generated inside the detector 1. The ultra-high vacuum feedthrough connector 6 is used to realize the exchange of electrical signals between the vacuum environment and the external environment. The host computer 4 is electrically connected to the image transfer system and the calibration lamp 1 (4) to control the coordinated operation of the image transfer system and the calibration lamp 1 (4).

[0037] Since the calibration step 1 (3) and the scintillator plate 1 (1) are almost the same height, that is, the imaging distance between them in the image transmission system is almost the same, the current image clarity of the image transmission system on the scintillator plate 1 (1) can be determined based on the clarity of the edge line of the calibration step 1 (3) before taking the calibration image.

[0038] Among them, the host computer 4 is located at the end of the self-calibration loss fast ion detector 1 system and is used to program and control the operation of the entire system.

[0039] Furthermore, the vacuum flange is installed on the racetrack-shaped flange window of the magnetic confinement fusion device, thus completing the vacuum seal. In addition, the front sections of the detector 1, probe shaft pipe 8 and calibration lamp signal line 5 are located in the vacuum environment separated by the vacuum flange 9, vacuum pipe 10 and vacuum window 11 of the magnetic confinement fusion device.

[0040] Detector 1 is located at the front of the system and is mainly used to generate light signals. The calibration image signal before the experiment is generated by the illumination of calibration lamp 1 (4) (calibration light signal), and the light signal during the experiment is generated by fast ions lost from the magnetic confinement fusion device striking the scintillator plate 1 (1) (experimental light signal). Based on this, the light from calibration lamp 1 (4) is projected onto scintillator plate 1 (1) to generate calibration light signals, and fast ions lost from the magnetic confinement fusion device strike scintillator plate 1 (1) to generate experimental light signals.

[0041] The calibration lamp 1 (4) is a surface-mount LED, whose emission wavelength is consistent with that of the scintillator plate 1 (1) to avoid additional aberrations in the image transfer system. Furthermore, the surface-mount LED type calibration lamp 1 (4) has the advantage of small size and will not obstruct the image transfer system's imaging of the scintillator inside the detector 1. Moreover, since the emission wavelength of the calibration lamp 1 (4) is consistent with the emission wavelength of the scintillator used in the detector 1, it avoids the image transfer system, which is specifically designed for the emission wavelength of the scintillator, from generating aberrations beyond its design when imaging the calibration image. Adjusting the image transfer system to clearly image the calibration image means that the image transfer system also clearly images the scintillator pattern in the experiment. In addition, the calibration lamp 1 (4) is lit once before each experiment to illuminate the scintillator area in the detector 1, thereby determining the position of the scintillator area in the current experiment. In the subsequent data processing of this experiment, a scintillator coordinate system can be established based on the scintillator position in the calibration image to determine the coordinates of the bright spot in the experimental image data, and the energy, throwing angle, and loss trajectory of the fast ions can be further obtained.

[0042] The image transmission system includes an imaging lens 2 and a high-speed camera 3. The high-speed camera 3 is mounted at the vacuum window 11, and the imaging lens 2 is mounted at the lens mount of the high-speed camera 3. The high-speed camera 3 captures images of the interior of the detector 1. Then, a high-speed camera signal cable 7 is used to connect the high-speed camera 3 and the host computer 4, thereby enabling the host computer 4 to control the high-speed camera 3.

[0043] The ultra-high vacuum feedthrough connector 6 is installed on the peripheral side of the vacuum pipe 10 to enable electrical signal exchange while ensuring an extremely low vacuum leakage rate.

[0044] The calibration lamp 1 (4) is connected to the host computer 4 via the calibration lamp signal line 5. The calibration lamp signal line 5 is led out through the wiring hole 1 (5) of the detector 1 and wired outside the probe shaft pipe 8 to avoid obstructing the optical path of the image transmission system. Furthermore, the host computer 4 can control the connection of the calibration lamp 1 (4). Further, inside the detector 1, the calibration lamp signal line 5 is hidden in the inner wall of the detector 1 to avoid obstructing the scintillator area, and is led out to the outside of the detector 1 through the wiring hole 1 (5).

[0045] The calibration lamp signal line 5 is welded to the metal contacts of the ultra-high vacuum power connector 6.

[0046] The probe shaft pipe 8 is hollow inside to block external stray light interference, so that during the experiment, the field of view of the high-speed camera 3 only shows the scintillation spot generated by fast ions hitting the scintillator plate 1 (1); during calibration, the field of view of the high-speed camera 3 only shows the calibration light signal.

[0047] In a preferred embodiment, such as Figure 6 As shown, the workflow of the host computer 4 controlling each component is as follows:

[0048] Step 1: Before each experiment, the magnetic confinement fusion device sends out a countdown signal through the experimental network;

[0049] Step 2: After receiving the countdown signal, the host computer 4 controls the calibration lamp 1 (4) inside the detector 1 to light up, illuminating the scintillator plate 1 (1) and calibration step 1 (3) inside the detector 1.

[0050] Step 3: The host computer 4 controls the high-speed camera 3 to focus on the edge line of the calibration step 1 (3) and take a frame of calibration image;

[0051] Step 4: The host computer controls the calibration light 1 (4) to turn off;

[0052] Step 5: When the experiment countdown ends, issue the trigger signal to start the experiment;

[0053] Step 6: Start the high-speed camera 3 and capture the scintillation pattern on the scintillator plate 1 (1);

[0054] Step 7: Experiment ends;

[0055] Step 8: The host computer 4 controls the high-speed camera 3 to end the shooting;

[0056] Step 9: The host computer 4 continues to wait for the countdown signal for the next experiment;

[0057] Step 10: Using the calibration image from this experiment, the image data from this experiment can be calibrated and further processed.

[0058] Based on the above workflow, before the experiment begins, the host computer 4 controls the calibration lamp 1 (4) to light up, and the high-speed camera 3 focuses on the edge line of the calibration step 1 (3) and takes a calibration image; during the experiment, the high-speed camera 3 takes a picture of the scintillation pattern on the scintillator plate 1 (1); after the experiment, the calibration image is used to calibrate the experimental image data.

[0059] As a preferred embodiment of the present invention, such as Figure 7As shown, due to the tilted installation angle of detector 1, scintillator plate 1(1) has a certain tilt angle in the field of view of high-speed camera 3, and the position of scintillator plate 1(1) in the field of view of high-speed camera 3 is also affected by the vibration of magnetic confinement fusion device. When taking calibration images before the experiment, the inside of detector 1 is lit by calibration lamp 1(4), and at this time the images of scintillator plate 1(1) and calibration step 1(3) appear in the field of view of high-speed camera 3. Since the outer edge of scintillator plate 1(1) is perpendicular to the inner wall of detector 1, and the upper edge of the inner wall of detector 1 is not at the same imaging distance as scintillator plate 1(1), the sharpness of the outer edge of scintillator plate 1(1) cannot be used as a reference for focusing of high-speed camera 3. The height of the calibration step 1 (3) is only slightly higher than the plane of the scintillator plate 1 (1), and it is used to distinguish the scintillator plate 1 (1) area and the calibration step 1 (3) area in the calibration image. Therefore, the image transmission system can determine the current image clarity of the scintillator plate 1 (1) based on the clarity of the edge line of the calibration step 1 (3) before taking the calibration image. Before each experiment, the host computer 4 first controls the high-speed camera 3 to focus on the edge line of the calibration step 1 (3), thereby ensuring the clarity of the calibration image and scintillator pattern taking in this experiment.

[0060] As an embodiment of the present invention, such as Figure 8 As shown, in this invention, a calibration can be performed before each experiment, and the obtained calibration image is only used as a reference for that experiment. Since each experiment only lasts for a few seconds, and the position of the scintillator plate 1(1) in the field of view of the high-speed camera 3 will not change significantly within a few seconds, the calibration image is more reliable and the experimental data is more accurate.

[0061] As a preferred embodiment of the present invention, such as Figure 9 As shown, it also has data preprocessing software, which performs calibration processing on the experimental image data. After importing the calibration image of this experiment into the data preprocessing software, the scintillator plate 1(1) region in the calibration image can be identified. After the identification is completed, the experimental image data can be cropped and calibrated according to the scintillator plate 1(1) region in the calibration image.

[0062] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A self-calibrated loss fast ion detector system for deuterium-tritium fusion experiments, comprising a vacuum flange for mounting on a magnetic confinement fusion device, characterized in that, Also includes: The vacuum pipe is installed at the corresponding window on the vacuum flange, and a vacuum viewing window is installed at the end of the vacuum pipe away from the window. The probe shaft tube is installed inside the vacuum tube; The detector is installed at one end of the probe shaft tube that extends into the vacuum chamber of the magnetic confinement fusion device and is used to generate optical signals. The detector is equipped with a scintillator plate, a calibration lamp, and a calibration step. The light from the calibration lamp can be projected onto the scintillator plate. The calibration step is installed on the edge of the scintillator plate and is higher than the plane of the scintillator plate. It is used to distinguish the scintillator plate area and the calibration step area in the calibration image and serves as a focusing reference for the image transfer system. Image transmission system, which is used to capture and image the light signals generated inside the detector; Ultra-high vacuum feedthrough connectors are used to enable electrical signal exchange between vacuum environments and external environments; The host computer is electrically connected to the image transmission system and the calibration lamps to control the coordinated operation of the image transmission system and the calibration lamps.

2. The self-calibrated loss fast ion detector system for deuterium-tritium fusion experiments according to claim 1, characterized in that, The light from the calibration lamp is projected onto the scintillator plate to generate a calibration light signal, while fast ions lost in the magnetic confinement fusion device strike the scintillator plate to generate an experimental light signal.

3. The self-calibrated loss fast ion detector system for deuterium-tritium fusion experiments according to claim 1, characterized in that, The calibration lamp is a surface-mount LED, and its emission wavelength is consistent with that of the scintillator board to avoid additional aberrations in the image transmission system during the calibration process.

4. A self-calibrated loss fast ion detector system for deuterium-tritium fusion experiments according to claim 1, characterized in that, The image transmission system includes an imaging lens and a high-speed camera. The high-speed camera is mounted at the vacuum window, and the imaging lens is mounted at the lens mount of the high-speed camera.

5. A self-calibrated loss fast ion detector system for deuterium-tritium fusion experiments according to claim 1, characterized in that, The ultra-high vacuum feedthrough connector is installed on the circumferential side of the vacuum pipe to enable electrical signal exchange while ensuring an extremely low vacuum leakage rate.

6. A self-calibrated loss fast ion detector system for deuterium-tritium fusion experiments according to claim 1, characterized in that, The calibration lamp is connected to the host computer via a calibration lamp signal line, which is led out through the wiring hole of the detector and routed outside the probe shaft pipe to avoid obstructing the optical path of the image transmission system.

7. A self-calibrated loss fast ion detector system for deuterium-tritium fusion experiments according to claim 6, characterized in that, The calibration lamp signal line is soldered to the metal contacts of the ultra-high vacuum power connector.

8. A self-calibrated loss fast ion detector system for deuterium-tritium fusion experiments according to claim 1, characterized in that, The probe shaft channel is hollow inside to block external stray light interference, so that during the experiment, the high-speed camera's field of view only shows the scintillation spot produced by fast ions hitting the scintillator plate; during calibration, the high-speed camera's field of view only shows the calibration light signal.

9. A self-calibrated loss fast ion detector system for deuterium-tritium fusion experiments according to claim 1, characterized in that, The workflow of the host computer controlling each component is as follows: Before the experiment begins, the host computer controls the calibration light to turn on, and the high-speed camera focuses on the calibration step edge line and takes a calibration image. During the experiment, a high-speed camera captured the scintillation pattern on the scintillator plate; After the experiment, the experimental image data was calibrated using the calibration image.