Optimization method based on gyrotron output Gaussian beam purity
By adjusting the distance between the circumferential tube module and the target module, recording the spot and temperature information, using Gaussian beam theory to extract characteristic parameters, and designing customized optical matching units, the problems of low accuracy and high cost of extraction of Gaussian beam feature parameters output by the circumferential tube module in the prior art are solved, and high-precision and low-cost feature parameter extraction and system performance improvement are achieved.
Patent Information
- Application Number
- CN202411742086.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-03-14
AI Technical Summary
When the prior art extracts the Gaussian beam characteristic parameters output by the cyclotron module, the accuracy is difficult to meet the requirements of high-precision application scenarios, and the equipment is complex and the operation is cumbersome, resulting in a long experimental cycle and high cost.
By adjusting the horizontal distance between the output window of the circumferential tube module and the target module, the temperature information of the spot and the center point of the spot at different distances is recorded. Using these data and Gaussian beam theory, the characteristic parameters of the Gaussian beam are accurately extracted, and a customized optical matching unit is designed based on these parameters.
High-precision extraction of Gaussian beam characteristic parameters output by the cyclotron module is realized, reducing experimental costs and operational complexity, ensuring the best matching effect between the cyclotron module and subsequent optical systems, and improving the performance of the entire system.
Smart Images
Figure CN119622309A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of gyrotrons and relates to a Gaussian beam purity optimization technology, in particular to an optimization method based on the purity of a Gaussian beam output by a gyrotron. Background Art
[0002] In the prior art, the study of the output characteristics of the gyrotron module mainly relies on directly measuring the far-field distribution or near-field distribution of its output beam to obtain relevant information, while the target module is mostly used to verify the focusing effect or energy distribution of the beam. However, these traditional methods have exposed many defects when extracting the key characteristic parameters of the Gaussian beam of the gyrotron module, such as the beam waist radius and beam waist position.
[0003] First, the accuracy of the extracted characteristic parameters is difficult to meet the stringent requirements of high-precision application scenarios. Secondly, the equipment required for the measurement process is complex and numerous, and the operating steps are cumbersome, which not only greatly increases the difficulty of the experiment, but also makes the experimental cycle lengthy and the time cost increases significantly. Furthermore, in order to achieve higher-precision measurements and analysis, it is often necessary to use high-precision measurement equipment and professional simulation software, which undoubtedly leads to high research costs. In addition, in the design of the optical matching unit, most of the existing technologies are based on empirical formulas or simply rely on simulation software, and fail to fully combine the unique output characteristics of the gyrotron module for customized design, resulting in the matching effect between the optical matching unit and the gyrotron module unable to achieve optimal performance.
[0004] Therefore, an optimization method based on the purity of the Gaussian beam output by the gyrotron is needed to solve the above problems. Summary of the invention
[0005] The present invention aims to solve at least one of the technical problems existing in the prior art; to this end, the present invention proposes an optimization method based on the purity of the Gaussian beam output by the gyrotron, so that when the characteristic parameters of the Gaussian beam output by the gyrotron are extracted, the method has the characteristics of high precision, low cost and easy operation, ensuring that the gyrotron module and the subsequent optical system can achieve the best matching effect, improving the performance of the entire system, and achieving the purpose of optimizing the purity of the Gaussian beam. The present invention adjusts the horizontal distance between the output window of the gyrotron module and the target module, and records in detail the light spot formed on the target module at different horizontal distances and the temperature information of the corresponding light spot center point. With the help of these data and based on the Gaussian beam theory, the characteristic parameters of the Gaussian beam are accurately extracted, and based on the extracted characteristic parameters, a customized optical matching unit specifically for the gyrotron module is designed, thereby ensuring that the gyrotron module and the subsequent optical system can achieve the best matching effect, improving the performance of the entire system, and achieving the purpose of optimizing the purity of the Gaussian beam.
[0006] To achieve the above object, a first aspect of the present invention provides a method for optimizing the purity of a Gaussian beam output by a gyrotron, which specifically comprises the following steps:
[0007] Adjust the gyrotron module output window and the target module to be in the same horizontal plane;
[0008] The horizontal distance between the gyrotron module output window and the target module is adjusted, and at different horizontal distances, the light spot formed on the target module and the temperature of the corresponding center point of the light spot are recorded when the gyrotron module outputs a Gaussian beam;
[0009] The characteristic parameters of the gyrotron module are obtained through the shapes, sizes and center point temperatures of multiple groups of light spots; wherein the characteristic parameters include the approximate radius of the beam waist and the approximate position of the beam waist;
[0010] An optical matching unit matching the gyrotron module is designed according to the characteristic parameters.
[0011] Furthermore, the method for obtaining the beam waist approximate radius comprises the following steps:
[0012] Preprocessing multiple groups of light spot images to obtain radius parameters of multiple groups of light spots;
[0013] The radius parameters of multiple sets of light spots are substituted into the Gaussian beam theory calculation formula and solved by the least squares method to obtain the approximate radius of the beam waist and the approximate Rayleigh length.
[0014] Furthermore, the Gaussian beam theory calculation formula is specifically as follows:
[0015]
[0016] Among them, ω is the radius of the spot, ω0 is the approximate radius of the beam waist, z is the horizontal distance between the gyrotron module output window and the target module, and z0 is the Rayleigh approximate length.
[0017] Furthermore, the method for obtaining the approximate position of the beam waist comprises the following steps:
[0018] Observe multiple groups of spot images, and use one group of symmetrical circular or elliptical spot images as the initial spot image;
[0019] Two adjacent spot images of the initial spot image are used as comparative spot images, and the temperature of the center point of the initial spot image is compared with the temperature of the center point of the comparative spot image to detect whether the temperature of the center point of the initial spot image is the highest value;
[0020] If the temperature at the center of the initial spot image is the highest value, the geometric center of the initial spot image is used as the approximate position of the beam waist;
[0021] If the temperature of the center point of the initial spot image is lower than or equal to the temperature of the center point of the comparison spot image, the target module is adjusted to move between the position of the initial spot image and the position of the comparison spot image, and multiple groups of secondary collected spot images are obtained;
[0022] A set of spot images with the highest center temperature is selected from multiple sets of secondary collected spot images as the final spot image, and the geometric center of the final spot image is taken as the approximate position of the beam waist.
[0023] Furthermore, the sizes and shapes of the multiple groups of light spots are acquired by photographing with a CCD camera.
[0024] Furthermore, the temperature of the center point of the light spot is measured and obtained by a temperature sensor.
[0025] Compared with the prior art, the present invention has the following beneficial effects:
[0026] By adjusting the horizontal distance between the gyrotron module output window and the target module, and recording in detail the light spot formed on the target module at different horizontal distances and the temperature information of the corresponding center point of the light spot, the Gaussian beam characteristic parameters are accurately extracted with the help of these data and based on the Gaussian beam theory. Based on the extracted characteristic parameters, a customized optical matching unit specifically for the gyrotron module is designed to ensure the best matching effect between the gyrotron module and the subsequent optical system, thereby improving the performance of the entire system and achieving the purpose of optimizing the Gaussian beam purity.
[0027] Moreover, in this process, it is only necessary to complete the movement of the target module and the acquisition of the temperature of the center point of the light spot to determine the characteristic parameters of the gyrotron module, so as to achieve the characteristics of high precision, low cost and easy operation when extracting the characteristic parameters of the Gaussian beam output by the gyrotron module. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0029] Figure 1 It is a schematic structural diagram of a device used in a method for optimizing the purity of a Gaussian beam output by a gyrotron in one embodiment of the present invention;
[0030] Figure 2 The figure is a flow chart of a method for optimizing the purity of a Gaussian beam output by a gyrotron according to an embodiment of the present invention.
[0031] Figure Number:
[0032] 1. Gyrotron module; 2. Target module; 3. CCD camera; 4. Temperature sensor. DETAILED DESCRIPTION
[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0034] See also Figure 1 and Figure 2 The first aspect of the present invention provides a method for optimizing the purity of a Gaussian beam output by a gyrotron, which specifically includes the following steps:
[0035] The output window of the gyrotron module 1 and the target module 2 are adjusted to be in the same horizontal plane, so that the gyrotron module 1 can accurately output to the target module 2 .
[0036] The horizontal distance between the output window of the gyrotron module 1 and the target module 2 is adjusted, and at different horizontal distances, the light spot formed on the target module 2 and the temperature of the corresponding center point of the light spot are recorded when the gyrotron module 1 outputs a Gaussian beam. That is, the characteristic parameters of the subsequent gyrotron module 1 are obtained according to the recorded parameter data (the light spot and the temperature of the center point of the light spot).
[0037] Specifically, the characteristic parameters of the gyrotron module 1 are obtained through the shapes, sizes and center point temperatures of multiple groups of light spots. It should be noted that the characteristic parameters include the approximate radius of the beam waist and the approximate position of the beam waist.
[0038] An optical matching unit matching the gyrotron module 1 is designed according to the characteristic parameters.
[0039] Through the above steps, this embodiment makes it possible to adjust the horizontal distance between the output window of the gyrotron module 1 and the target module 2, and record in detail the light spot formed on the target module 2 at different horizontal distances and the temperature information of the corresponding center point of the light spot. With the help of these data and based on the Gaussian beam theory, the Gaussian beam characteristic parameters can be accurately extracted, and based on the extracted characteristic parameters, a customized optical matching unit specifically for the gyrotron module 1 is designed, thereby ensuring the best matching effect between the gyrotron module 1 and the subsequent optical system, improving the performance of the entire system, and achieving the purpose of optimizing the purity of the Gaussian beam.
[0040] Moreover, in this process, it is only necessary to complete the movement of the target module 2 and the acquisition of the temperature of the center point of the light spot to determine the characteristic parameters of the gyrotron module 1, so as to achieve the characteristics of high precision, low cost and easy operation when extracting the characteristic parameters of the Gaussian beam output by the gyrotron module 1.
[0041] In this embodiment, the method for obtaining the beam waist approximate radius includes the following steps:
[0042] Preprocessing multiple groups of light spot images to obtain radius parameters of multiple groups of light spots;
[0043] The radius parameters of multiple sets of light spots are substituted into the Gaussian beam theory calculation formula and solved by the least squares method to obtain the approximate radius of the beam waist and the approximate Rayleigh length.
[0044] Specifically, the Gaussian beam theory calculation formula is as follows:
[0045]
[0046] Wherein, ω is the radius of the spot, ω0 is the approximate radius of the beam waist, z is the horizontal distance between the output window of the gyrotron module 1 and the target module 2, and z0 is the Rayleigh approximate length.
[0047] In other embodiments, the method for obtaining the approximate position of the beam waist comprises the following steps:
[0048] Observe multiple groups of spot images, and use one group of symmetrical circular or elliptical spot images as the initial spot image;
[0049] Two adjacent spot images of the initial spot image are used as comparative spot images, and the temperature of the center point of the initial spot image is compared with the temperature of the center point of the comparative spot image to detect whether the temperature of the center point of the initial spot image is the highest value;
[0050] If the temperature at the center of the initial spot image is the highest value, the geometric center of the initial spot image is used as the approximate position of the beam waist;
[0051] If the temperature of the center point of the initial spot image is lower than or equal to the temperature of the center point of the comparison spot image, the target module 2 is adjusted to move between the position of the initial spot image and the position of the comparison spot image, and multiple groups of secondary collected spot images are obtained;
[0052] A set of spot images with the highest center temperature is selected from multiple sets of secondary collected spot images as the final spot image, and the geometric center of the final spot image is taken as the approximate position of the beam waist.
[0053] In the above steps, a preliminary judgment is first made based on the imaging of the light spot. Specifically, since the shape of the light spot presented at the beam waist position is a relatively regular circle or ellipse, and the energy distribution is relatively uniform and symmetrical, a preliminary judgment can be made through the imaging of the light spot. In addition, since the energy density is highest at the beam waist position, the temperature at the center point is also the highest. Therefore, the temperature of the center point of the light spot image can be monitored as an important basis for secondary judgment of the beam waist position of the gyrotron module 1. Furthermore, the approximate position of the beam waist can be inferred by measuring whether the light spot imaging is symmetrical and the temperature of the center point of the light spot, so as to provide an important basis for the subsequent design of the optical matching unit corresponding to the gyrotron module 1.
[0054] In other embodiments, the sizes and shapes of multiple groups of light spots are captured by the CCD camera 3, so that the light spot imaging is clearer, and the energy distribution of the light spots can be observed by the CCD camera 3 during shooting, thereby providing auxiliary judgment for obtaining the approximate position of the beam waist and the approximate radius of the beam waist of the gyrotron module 1, so that the measurement of the characteristic parameters of the gyrotron module 1 (the approximate position of the beam waist and the approximate radius of the beam waist) is more accurate.
[0055] In a further embodiment, the temperature of the center of the light spot is measured and obtained by a temperature sensor 4, wherein the temperature sensor 4 is arranged on a side of the target module 2 away from the gyrotron module 1, so that when the gyrotron module 1 forms a light spot on the target module 2, the temperature of the center of the light spot can be measured by moving the target module 2 to the position of the temperature sensor 4.
[0056] like Figure 1 As shown, in other embodiments, a device is also proposed to conduct experimental research to facilitate the acquisition of characteristic parameters of the gyrotron module 1, specifically including: a gyrotron module 1, a lifting guide plate, a target module 2, a CCD camera 3 and a temperature sensor 4.
[0057] The lifting guide plate is arranged on one side of the gyrotron module 1 , and the target module 2 is arranged on the lifting guide plate and can move relatively along the lifting guide plate.
[0058] The target module 2 and the output window of the gyrotron module 1 are located in the same horizontal plane by adjusting the lifting guide plate in the vertical direction.
[0059] The CCD camera 3 and the temperature sensor 4 are both arranged on the lifting guide rail plate, and the temperature sensor 4 is arranged on a side of the target module 2 away from the gyrotron module 1 for measuring the temperature of the center point of the light spot.
[0060] Through this device, it is possible to quickly adjust the distance between the target module 2 and the output window of the gyrotron module 1, and obtain the characteristic parameters of the gyrotron module 1 based on the light spot obtained at each distance and the temperature of the center point of the light spot, so as to provide data support for the design of the optical matching unit, so that the gyrotron module 1 can achieve the best matching effect with the subsequent optical system, improve the performance of the entire system, and achieve the purpose of optimizing the purity of the Gaussian beam.
[0061] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.
Claims
1. A method for optimizing the purity of a gyrotron output Gaussian beam, characterized in that: The specific steps include: Adjusting the output window of the gyrotron module (1) and the target module (2) to be located in the same horizontal plane; The horizontal distance between the output window of the gyrotron module (1) and the target module (2) is adjusted, and at different horizontal distances, the light spot formed on the target module (2) and the temperature of the corresponding center point of the light spot are recorded when the gyrotron module (1) outputs a Gaussian beam; Acquiring characteristic parameters of a gyrotron module (1) through the shapes, sizes and center point temperatures of multiple groups of light spots; wherein the characteristic parameters include an approximate beam waist radius and an approximate beam waist position; An optical matching unit matching the gyrotron module (1) is designed according to the characteristic parameters.
2. The method for optimizing the purity of the gyrotron output Gaussian beam according to claim 1, characterized in that: The method for obtaining the beam waist approximate radius comprises the following steps: Preprocessing multiple groups of light spot images to obtain radius parameters of multiple groups of light spots; The radius parameters of multiple sets of light spots are substituted into the Gaussian beam theory calculation formula and solved by the least squares method to obtain the approximate radius of the beam waist and the approximate Rayleigh length.
3. The method for optimizing the purity of the gyrotron output Gaussian beam according to claim 2, characterized in that: The Gaussian beam theory calculation formula is specifically as follows: Wherein, ω is the radius of the light spot, ω0 is the approximate radius of the beam waist, z is the horizontal distance between the output window of the gyrotron module (1) and the target module (2), and z0 is the Rayleigh approximate length.
4. The method for optimizing the purity of a gyrotron output Gaussian beam according to claim 1, characterized in that: The method for obtaining the approximate position of the beam waist comprises the following steps: Observe multiple groups of spot images, and use one group of symmetrical circular or elliptical spot images as the initial spot image; Two adjacent spot images of the initial spot image are used as comparative spot images, and the temperature of the center point of the initial spot image is compared with the temperature of the center point of the comparative spot image to detect whether the temperature of the center point of the initial spot image is the highest value; If the temperature at the center of the initial spot image is the highest value, the geometric center of the initial spot image is used as the approximate position of the beam waist; If the temperature of the center point of the detected initial light spot image is lower than or equal to the temperature of the center point of the comparative light spot image, the target module (2) is adjusted to move between the position of the initial light spot image and the position of the comparative light spot image, and a plurality of sets of secondary collected light spot images are obtained; A set of spot images with the highest center temperature is selected from multiple sets of secondary collected spot images as the final spot image, and the geometric center of the final spot image is taken as the approximate position of the beam waist.
5. The method for optimizing the purity of a gyrotron output Gaussian beam according to claim 1, characterized in that: The sizes and shapes of the multiple groups of light spots are captured by a CCD camera (3).
6. The method for optimizing the purity of a gyrotron output Gaussian beam according to claim 1, characterized in that: The temperature of the center point of the light spot is measured and obtained by a temperature sensor (4).