A high power millimeter wave quasi-optical matching unit

Abstract

The present application relates to the technical field of high-power millimeter wave, and particularly relates to a high-power millimeter wave quasi-optical matching unit. The technical scheme comprises a matching unit body, corrugated circular waveguides and circular waveguides are arranged on the two sides of the unit body respectively, the matching unit body comprises an input window, a phase correction mirror, an output window, a support adjusting assembly and a plurality of load porcelain tubes, the phase correction mirror comprises a reflecting mirror one and a reflecting mirror two, the phase correction mirror is designed by using an adaptive optimization iterative algorithm, efficient conversion of the high-power gyrotron quasi-Gaussian mode beam to a TEM11 mode beam is realized, energy utilization is improved, and beam transmission indexes are guaranteed; six support adjusting assemblies are arranged, the mirror and the radiation inlet position can be finely adjusted, process errors and beam deviations can be adapted, system adaptability and fault tolerance are improved, and output beam parameter stability is ensured.

Description

Technical Field

[0001] This invention relates to the field of high-power millimeter-wave technology, and in particular to a high-power millimeter-wave quasi-optical matching unit. Background Technology

[0002] Thermonuclear fusion requires heating the plasma to a specific temperature. Tokamak devices achieve energy conversion heating by exciting waves in the plasma, but ohmic heating alone cannot reach the temperatures required for thermonuclear fusion; wave heating becomes a crucial auxiliary method. With the development of the electron cyclotron resonant heating system, a core auxiliary heating technology, the cyclotron tube, as the high-power wave source of this system, has made rapid progress. The electron cyclotron resonant heating system is a high-power microwave system with an electron cyclotron wave frequency of 28GHz~170GHz, matched to the electron cyclotron frequency of the tokamak plasma, used for electron heating. Its microwave part consists of a cyclotron tube, a quasi-optical mode conversion unit, a transmission line, and a transmitting antenna, operating according to the "generation-excitation-transmission-injection" process. Currently, with the advancement of the International Thermonuclear Experimental Reactor (ITER) program, the transmission line of the electron cyclotron wave system is developing rapidly, and the application of the quasi-optical mode conversion unit is becoming increasingly widespread. As a core component, it needs to achieve efficient conversion from quasi-Gaussian mode to TEM11 mode. Furthermore, due to inconsistencies in cyclotron tube development, an ideally matched quasi-optical mode conversion unit is required to ensure beam control, and its performance directly affects the overall efficiency of the wave heating system.

[0003] However, in the existing technology, high-power millimeter-wave quasi-optical mode conversion units face problems such as low conversion efficiency, poor beam quality, and poor adaptability to changes in input beam parameters when converting from quasi-Gaussian mode to TEM11 mode. This greatly limits the application efficiency and performance of high-power millimeter-wave systems in fields such as thermonuclear fusion research, high-resolution long-range radar, and material industrial heating. Therefore, this application proposes a high-power millimeter-wave quasi-optical matching unit. Summary of the Invention

[0004] The purpose of this invention is to address the problems of low conversion efficiency and poor beam quality in the prior art, which limit the efficiency and performance of high-power millimeter-wave systems in multiple fields, and to propose a high-power millimeter-wave quasi-optical matching unit.

[0005] The technical solution of the present invention: a high-power millimeter-wave quasi-optical matching unit, comprising a matching unit body, with corrugated circular waveguides and circular waveguides respectively provided on both sides of the unit body, the matching unit body including an input window, a phase correction mirror, an output window, a support adjustment component and multiple load ceramic tubes, the phase correction mirror including a first reflecting mirror and a second reflecting mirror, the phase correction mirror being designed using an adaptive optimization iterative algorithm;

[0006] The input window is used to receive a quasi-Gaussian mode beam from a high-power cyclotron.

[0007] The phase correction mirror is used to convert the quasi-Gaussian mode beam into a TEM11 mode beam adapted to long-distance corrugated waveguide transmission lines.

[0008] The output window is set to correspond to the input end of the corrugated circular waveguide, and the output window is used to transmit the converted TEM11 mode beam to the corrugated waveguide transmission line.

[0009] The support adjustment assembly is provided in six parts, and the support adjustment assembly is used to make adaptive fine adjustments according to the actual process conditions and processing errors.

[0010] Optionally, the circular waveguide is provided with an arc detection port and a sampling window at its lower part, the matching unit body is provided with two lifting lugs at its upper part, and the matching unit body is provided with a support plate at its lower part;

[0011] The load ceramic tubes are located inside the main body of the matching unit, and there are twelve of them. The load ceramic tubes are used to absorb stray waves.

[0012] Cooling water pipes are provided behind the first and second reflective mirrors. One end of each cooling water pipe is equipped with a water pipe connector. The cooling water pipes are used to adapt to the beam output characteristics of the high-power cyclotron.

[0013] Optionally, the support adjustment assembly includes a horizontal and vertical rotating pin connection assembly, which enables the position calibration of the mirror and the radiation inlet through bidirectional rotation adjustment.

[0014] Optionally, the surface profile of the phase-corrected mirror is generated by an adaptive optimization iterative algorithm, with the goal of maximizing beam conversion efficiency and ensuring that the output mode purity meets a preset threshold during the iteration process.

[0015] Optionally, the matching unit is implemented using the following method, which includes the following steps:

[0016] S1: Adjust the horizontal and vertical rotation pins of the support adjustment components so that mirror one and mirror two are aligned with the quasi-Gaussian mode beam received by the input window.

[0017] S2: Convert the input quasi-Gaussian mode beam into a TEM11 mode beam adapted to a corrugated circular waveguide by using a phase correction mirror.

[0018] S3: Detect the quality of the TEM11 mode beam emitted by the output window, and further fine-tune the horizontal and vertical rotation pins of the support adjustment component based on the detection results to optimize the beam conversion efficiency;

[0019] S4: Install a beam analysis device at the main output of the matching unit, adjust the voltage, magnetic field and single transmission energy of the cyclotron tube to verify the performance. If it does not meet the standard, make fine adjustments. If it passes the test, integrate it into the system and check it regularly to ensure transmission and conversion.

[0020] Optionally, the beam quality mentioned in step S3 includes mode purity, beam divergence angle, and transmission efficiency. The fine-tuning process precisely adjusts the displacement of the horizontal and vertical rotating pins corresponding to the support adjustment component to make the mode purity reach the stable state required by the application scenario, control the beam divergence angle within a reasonable range suitable for corrugated waveguide transmission, and improve the energy utilization rate of beam transmission.

[0021] Optionally, the high-power cyclotron is used to output a high-power millimeter-wave beam in quasi-Gaussian mode;

[0022] The high-power cyclotron has an output power of 100kW-1MW and an operating frequency of 70GHz-140GHz;

[0023] The input window of the matching unit body is set to correspond to the output end of the high-power cyclotron, and the input end of the corrugated waveguide transmission line composed of the corrugated circular waveguide is set to correspond to the output window of the matching unit body, which is used to transmit the TEM11 mode beam converted by the matching unit body.

[0024] Compared with the prior art, the present invention has the following beneficial technical effects:

[0025] 1. This invention designs a phase correction mirror using an adaptive optimization iterative algorithm, aiming to maximize beam conversion efficiency and achieve the required output mode purity. It efficiently converts the quasi-Gaussian mode beam of a high-power cyclotron oscillator into a TEM11 mode beam suitable for long-distance corrugated waveguide transmission, significantly improving energy utilization. At the same time, it ensures that the converted beam has excellent circular symmetry and a Gaussian power distribution with the center higher than the edges. The mode purity and beam divergence angle are precisely matched to the transmission requirements. This invention solves the problem of low conversion efficiency in existing technologies, ensures stable system transmission, and avoids energy loss and transmission interference.

[0026] 2. The present invention also sets up six support adjustment components, which can be precisely fine-tuned according to actual process errors and gyrotube output beam deviation, to achieve precise calibration of phase correction mirror and radiation entrance, improve the adaptability of matching unit to input beam parameter changes and system fault tolerance, and ensure that output beam parameters are stable and meet the standards.

[0027] In summary, this invention designs a phase correction mirror using an adaptive optimization iterative algorithm, which efficiently converts the high-power cyclotron tube quasi-Gaussian mode beam to the TEM11 mode beam, improving energy utilization and ensuring beam transmission performance. Furthermore, by setting up six support adjustment components, the mirror and radiation entrance positions can be precisely fine-tuned to adapt to process errors and beam deviations, improving system adaptability and fault tolerance, and ensuring stable output beam parameters. Attached Figure Description

[0028] Figure 1 A schematic diagram of the three-dimensional structure of a high-power millimeter-wave quasi-optical matching unit;

[0029] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0030] Figure 3 This is a schematic diagram of the supporting adjustment component in a high-power millimeter-wave quasi-optical matching unit;

[0031] Figure label:

[0032] 1. Matching unit body;

[0033] 2. Support adjustment components;

[0034] 3. One reflecting mirror;

[0035] 4. Two reflecting mirrors;

[0036] 5. Corrugated circular waveguide;

[0037] 6. Circular waveguide;

[0038] 7. Arc detection port;

[0039] 8. Sampling window;

[0040] 9. Hanging lugs;

[0041] 10. Load-bearing ceramic tube;

[0042] 11. Cooling water pipes;

[0043] 12. Water pipe joints;

[0044] 13. Pallet. Detailed Implementation

[0045] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0046] like Figures 1-3As shown, this invention proposes a high-power millimeter-wave quasi-optical matching unit, comprising a matching unit body 1, two lifting lugs 9 on the top of the matching unit body 1, a load ceramic tube 10 for absorbing stray waves, a support plate 13 on the bottom of the matching unit body 1, and corrugated circular waveguides 5 and 6 on both sides of the unit body, respectively. The corrugated circular waveguide 5 adopts an integrated corrugated structure design, and its inner wall corrugated shape is optimized through joint simulation of fluid dynamics and electromagnetics. This not only effectively reduces the transmission loss of the TEM11 mode beam, but also offsets the impact of vibration generated by the high-power cyclotron tube during operation on the waveguide connection sealing, avoiding beam leakage, and extending the service life of the waveguide transmission line. To meet the requirements of long-distance, high-power beam transmission, the circular waveguide 6 is equipped with an arc detection port 7 and a sampling window 8 at its lower part. The arc detection port 7 is encapsulated in high-temperature resistant transparent ceramic material, which can monitor in real time whether an arc discharge phenomenon occurs inside the matching unit, provide timely warning of equipment failure, avoid safety hazards caused by high-power beams, and ensure the safe operation of the system. The sampling window 8 is equipped with a high-transmittance, low-loss optical lens, which can accurately collect sample data of the output beam without affecting beam transmission, providing a reliable basis for subsequent beam quality testing and parameter fine-tuning. Performance monitoring can be completed without disassembling the equipment, improving maintenance convenience. The main body 1 of the matching unit includes an input window and a phase... The system comprises a phase correction mirror, an output window, a support adjustment assembly 2, and multiple load ceramic tubes 10. The load ceramic tubes 10 are used to absorb stray waves. Located inside the main body 1 of the matching unit, there are twelve load ceramic tubes 10 arranged in a ring evenly around the outer side of the phase correction mirror. This layout design can comprehensively cover the propagation path of stray waves, achieving efficient absorption and effectively preventing stray waves from reflecting and superimposing within the unit, thus avoiding interference with the mode purity and transmission stability of the main beam. Furthermore, the load ceramic tubes 10 are made of high-temperature resistant, low-dielectric-loss ceramic materials, capable of withstanding the energy impact and temperature rise caused by stray waves, and are not prone to aging over long-term use, ensuring the safety of the matching unit. For stable operation, the surface profile of the phase correction mirror is generated by an adaptive optimization iterative algorithm. During the iteration process, the goal is to maximize the beam conversion efficiency and meet the preset threshold for output mode purity. The phase correction mirror includes a first mirror 3 and a second mirror 4. The phase correction mirror is designed by an adaptive optimization iterative algorithm to adapt to different input beam conditions. A cooling water pipe 11 is provided behind the first mirror 3 and the second mirror 4. A water pipe connector 12 is provided at one end of the cooling water pipe 11. The cooling water pipe 11 is used for heat dissipation and can be adapted to the beam output characteristics of high-power cyclotron oscillators. It maintains the consistency of structural stability and beam conversion performance during long-term continuous operation.

[0047] The input window is used to receive quasi-Gaussian mode beams from a high-power cyclotron.

[0048] Phase-correcting mirrors are used to convert quasi-Gaussian mode beams into TEM11 mode beams adapted for long-distance corrugated waveguide transmission lines.

[0049] The output window is set to correspond to the input end of the corrugated circular waveguide 5. The output window is used to transmit the converted TEM11 mode beam to the corrugated waveguide transmission line.

[0050] The number of support adjustment components 2 is six. The support adjustment components 2 can be adaptively fine-tuned according to the actual process conditions and processing errors to ensure that the basic parameters of the output beam meet the preset application indicators. The support adjustment components 2 include rotating pin connection components in both horizontal and vertical directions. Through the dual-directional rotation adjustment function, the precise position calibration of the mirror and the radiation entrance can be achieved. By adjusting the support adjustment components 2, dual-directional rotation adjustment can be achieved, thereby completing the precise position adjustment of the mirror relative to the radiation entrance.

[0051] This embodiment also proposes a method for using the above-mentioned high-power millimeter-wave quasi-optical matching unit, which includes the following steps:

[0052] S1. Using the two lifting lugs 9 on top of the matching unit body 1 and the support plate 13 below, hoist and fix the matching unit body 1 in the designated installation position, ensuring that the installation surface is flat and the structure is stable. Then, align the input window of the matching unit body 1 with the output end of the high-power cyclotron oscillator tube with an output power range of 100kW-1MW and an operating frequency of 70GHz-140GHz. At the same time, ensure that the output window is precisely aligned with the input end of the corrugated circular waveguide 5. Keep the circular waveguide 6 on the other side unobstructed, using the corrugated design to offset the influence of cyclotron vibration on the connection. Next, operate the six support adjustment components 2, through each The horizontal and vertical rotating pins of the components are used for adjustment. The trajectory of the incident beam is observed through the equipment's observation window. The horizontal and vertical rotating pins of each supporting adjustment component are finely adjusted to ensure that the first and second reflecting mirrors 3 and 4 are precisely aligned with the quasi-Gaussian mode beam received by the input window. This ensures that the beam accurately illuminates the center of the two mirrors, completing the precise position calibration of the mirrors and the radiation entrance. Finally, the arc detection port 7 and sampling window 8 below the circular waveguide 6 are checked for unobstructed access. It is confirmed that the twelve load ceramic tubes 10 are installed in place and that the cooling water pipes 11 are securely connected through the water pipe joints 12 without any leakage risks, preparing for subsequent operation.

[0053] S2. Activate the high-power cyclotron oscillator to stably output a high-power millimeter-wave beam in quasi-Gaussian mode. The beam is incident on the phase-correcting mirror through the input window of the matching unit 1. The surface profile of this mirror is generated iteratively by an adaptive optimization algorithm with the goal of maximizing beam conversion efficiency and achieving the required output mode purity, adapting to different input beam conditions. Subsequently, the phase-correcting mirror precisely modulates the phase of the incident quasi-Gaussian mode beam, efficiently converting it into a TEM11 mode beam adapted to the corrugated circular waveguide transmission line. The converted beam is then transmitted over long distances through the output window into the corrugated circular waveguide 5. This conversion process not only achieves precise mode matching but also... It can effectively compress the beam divergence angle, making the beam energy more concentrated and improving the transmission efficiency. At the same time, the spurious waves generated during the conversion process are fully absorbed by the twelve load ceramic tubes 10 inside the matching unit body 1, avoiding the spurious waves from reflecting and causing interference inside the unit, ensuring the mode purity and transmission stability of the main beam. The cooling water pipe 11 heat dissipation system needs to be turned on simultaneously to continuously cool down through the cooling pipes behind the reflector, keeping the mirror temperature within a safe range, preventing the beam conversion performance from degrading due to thermal deformation, and ensuring that the matching unit body 1 maintains structural stability and beam conversion performance consistency during long-term continuous operation, perfectly adapting to the beam output characteristics of high-power cyclotron.

[0054] S3. The TEM11 mode beam data is collected through the sampling window 8 below the circular waveguide 6. Combined with the arc detection port 7 to monitor the operating status, the beam quality is comprehensively tested. The core indicators include mode purity, beam divergence angle and transmission efficiency. Then, based on the test results, the six support adjustment components 2 are adaptively fine-tuned. By precisely controlling the displacement of the horizontal and vertical rotating pins, the beam pointing and beam waist position are optimized so that the mode purity reaches the stable state required by the application scenario, and the beam divergence angle is controlled within a reasonable range suitable for corrugated waveguide transmission, while improving the beam transmission energy utilization rate. Finally, the test-fine-tuning process is repeated until the basic parameters of the output beam meet the preset application indicators, realizing high-efficiency and high-stability mode conversion. This method is applicable to high-power millimeter-wave systems in fields such as thermonuclear fusion research, high-resolution long-range radar, and material industrial heating.

[0055] S4. Deploy a dedicated beam analysis device at the output end of the matching unit body 1 to monitor the performance parameters of the TEM11 mode beam in real time; adjust the voltage, magnetic field strength, and single-transmission energy of the high-power cyclotron to simulate the operating conditions under different working conditions, and comprehensively verify the beam conversion efficiency, mode stability, and adaptability of the matching unit body 1. This verification process can cover various scenarios in practical applications, ensuring that the matching unit can still perform stably under complex working conditions. If the test results do not meet the standards, return to step S3 for targeted fine-tuning, or adjust the cyclotron parameters according to the working conditions until the beam quality, mode purity, divergence angle, and transmission efficiency fully meet the application requirements. After successful performance verification, the matching unit 1 is formally integrated into the high-power millimeter-wave system, forming a complete operational link with the corrugated circular waveguide transmission line and terminal equipment. The integrated system has a compact architecture, strong compatibility, and can be quickly connected to existing high-power millimeter-wave application platforms without requiring large-scale modifications to the original system, thus reducing application costs. During subsequent use, the heat dissipation effect of the cooling water pipe 11, the loss status of the load ceramic tube 10, and the tightness of the support adjustment component 2 are checked regularly. At the same time, the optical lenses of the input window, output window, and sampling window are cleaned regularly to prevent dirt from affecting the wave transmission performance. Through routine maintenance, the service life of the matching unit can be effectively extended, ensuring the long-term stable operation of the system and ensuring that the beam transmission and conversion performance continues to meet the standards.

[0056] This embodiment uses the electron cyclotron resonance heating system of a thermonuclear fusion device as an application scenario. The high-power cyclotron oscillator tube used has an operating frequency of 170GHz and an output power of 500kW. The specific implementation process is as follows:

[0057] The high-power millimeter-wave quasi-optical matching unit has corrugated circular waveguides 5 and circular waveguides 6 on both sides of its main body 1. The main body contains an input window, a phase correction mirror, and an output window. The surface profile of the phase correction mirror is generated by an adaptive optimization iterative algorithm, with the iterative goal of maximizing beam conversion efficiency and ensuring that the purity of the output mode meets a preset threshold. Six support and adjustment components 2 are configured, each of which includes horizontal and vertical rotating pin connection components. Twelve load ceramic tubes 10 are installed inside the main body. Cooling water pipes 11 are arranged behind the first reflector 3 and the second reflector 4, with one end of the water pipe connected to a water pipe connector 12. An arc detection port 7 and a sampling window 8 are provided below the circular waveguide 6. Two lifting lugs 9 are provided above the main body, and a support plate 13 is provided below.

[0058] Connect the corrugated circular waveguide 5 of the high-power millimeter-wave quasi-optical matching unit to the output end of the high-power cyclotron tube, ensuring that the input window of the high-power millimeter-wave quasi-optical matching unit is aligned with the output window of the cyclotron tube; fix the high-power millimeter-wave quasi-optical matching unit in the designated position using the lugs 9, and align it with the subsequent corrugated waveguide transmission line; operate the horizontal and vertical rotation pins of the six support adjustment components 2, and judge the incident situation in conjunction with the observation window, adjust the positions of the first reflector 3 and the second reflector 4, so that the quasi-Gaussian mode beam output by the cyclotron tube accurately illuminates the center of the mirror;

[0059] The high-power cyclotron is turned on, and a quasi-Gaussian mode beam of 170 GHz and 500 kW is output. The beam is incident on the phase correction mirror through the input window. The mirror modulates the beam according to the curved profile designed by the adaptive optimization iterative algorithm, and converts it into a TEM11 mode beam that is adapted to the corrugated circular waveguide transmission line. The stray waves generated during the conversion process are absorbed by twelve load ceramic tubes 10.

[0060] The output beam distribution is observed through the sampling window 8 below the circular waveguide 6. The mode purity, beam divergence angle, and transmission efficiency are detected using a beam analysis device. If the parameters do not meet the application requirements, the horizontal and vertical rotation pin displacements of the support adjustment component 2 are precisely adjusted to stabilize the mode purity, adapt the beam divergence angle to the corrugated waveguide transmission, and improve energy utilization. During the adjustment process, the cooling water pipe 11 runs continuously to maintain the temperature stability of the reflector surface.

[0061] A beam analysis device is deployed at the output of the high-power millimeter-wave quasi-optical matching unit. The voltage and magnetic field parameters of the cyclotron are adjusted to the ideal working state, and the single-emission energy is controlled to verify the beam conversion performance. If the standard is not met, the parameter fine-tuning steps are repeated. After the standard is met, the high-power millimeter-wave quasi-optical matching unit is integrated into the electron cyclotron resonant heating system. During system operation, the status of the high-power millimeter-wave quasi-optical matching unit is checked periodically through the arc detection port 7 to ensure continuous and efficient energy transmission and mode conversion.

[0062] In this embodiment, the high-power millimeter-wave quasi-optical matching unit achieves efficient conversion from quasi-Gaussian mode to TEM11 mode, meeting the stringent requirements of the thermonuclear fusion electron cyclotron resonance heating system for beam quality.

[0063] The above specific embodiments are merely optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A high-power millimeter-wave quasi-optical matching unit, comprising a matching unit body (1), wherein corrugated circular waveguides (5) and circular waveguides (6) are respectively provided on both sides of the unit body, characterized in that, The matching unit body (1) includes an input window, a phase correction mirror, an output window, a support adjustment component (2) and multiple load ceramic tubes (10). The phase correction mirror includes a first reflective mirror (3) and a second reflective mirror (4). The phase correction mirror is designed using an adaptive optimization iterative algorithm. The input window is used to receive a quasi-Gaussian mode beam from a high-power cyclotron. The phase correction mirror is used to convert the quasi-Gaussian mode beam into a TEM11 mode beam adapted to long-distance corrugated waveguide transmission lines. The output window is set to correspond to the input end of the corrugated circular waveguide (5), and the output window is used to transmit the converted TEM11 mode beam to the corrugated waveguide transmission line. The support adjustment component (2) is provided in six parts, and the support adjustment component (2) is used to make adaptive fine adjustments according to the actual process conditions and processing errors.

2. The high-power millimeter-wave quasi-optical matching unit according to claim 1, characterized in that, The circular waveguide (6) is provided with an arc detection port (7) and a sampling window (8) below it. The matching unit body (1) is provided with two lifting lugs (9) above it and a support plate (13) below it. The load ceramic tubes (10) are located inside the matching unit body (1), and there are twelve of them. The load ceramic tubes (10) are used to absorb stray waves. A cooling water pipe (11) is provided behind the first (3) and the second (4) of the reflecting mirror. A water pipe connector (12) is provided at one end of the cooling water pipe (11). The cooling water pipe (11) is used to adapt to the beam output characteristics of the high-power cyclotron.

3. The high-power millimeter-wave quasi-optical matching unit according to claim 1, characterized in that, The support adjustment component (2) includes a horizontal and vertical rotating pin connection component, which realizes the position calibration of the mirror and the radiation entrance through the bidirectional rotation adjustment function.

4. The high-power millimeter-wave quasi-optical matching unit according to claim 1, characterized in that, The surface profile of the phase-corrected mirror is generated by an adaptive optimization iterative algorithm, with the goal of maximizing beam conversion efficiency and ensuring that the output mode purity meets a preset threshold during the iteration process.

5. A high-power millimeter-wave quasi-optical matching unit according to claim 1, characterized in that, The matching unit is implemented using the following method, which includes the following steps: S1. Adjust the horizontal and vertical rotation pins of the support adjustment component (2) so that the first (3) and the second (4) of the reflector are aligned with the quasi-Gaussian mode beam received by the input window. S2. The input quasi-Gaussian mode beam is converted into a TEM11 mode beam adapted to the corrugated circular waveguide (5) by a phase correction mirror. S3. Detect the quality of the TEM11 mode beam emitted by the output window, and further fine-tune the horizontal and vertical rotation pins of the support adjustment component (2) based on the detection results to optimize the beam conversion efficiency. S4. Set up a beam analysis device at the output end of the main body (1) of the matching unit, adjust the voltage, magnetic field and single transmission energy of the cyclotron tube, verify the performance, and fine-tune if it does not meet the standard. After passing the standard, integrate it into the system and check it regularly to ensure transmission and conversion.

6. A high-power millimeter-wave quasi-optical matching unit according to claim 5, characterized in that, The beam quality mentioned in step S3 includes mode purity, beam divergence angle and transmission efficiency. The fine-tuning process precisely adjusts the displacement of the horizontal and vertical rotating pins corresponding to the support adjustment component (2) so that the mode purity reaches the stable state required by the application scenario, the beam divergence angle is controlled within a reasonable range suitable for corrugated waveguide transmission, and the energy utilization rate of beam transmission is improved.

7. A high-power millimeter-wave quasi-optical matching unit according to claim 2, characterized in that... The high-power cyclotron tube is used to output a high-power millimeter-wave beam in quasi-Gaussian mode. The high-power cyclotron has an output power of 100kW-1MW and an operating frequency of 70GHz-140GHz; The input window of the matching unit body (1) is set to correspond to the output end of the high-power cyclotron oscillator, and the input end of the corrugated waveguide transmission line composed of the corrugated circular waveguide (5) is set to correspond to the output window of the matching unit body (1), which is used to transmit the TEM11 mode beam converted by the matching unit body (1).

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