Electromagnetic probe for plasma diagnosis and electromagnetic measurement system
By designing an electromagnetic probe for plasma diagnosis with array distribution, the different probes of the probe array are distributed in two different regions with height differences, the problem of unreasonable spatial distribution and insufficient reliability of traditional probes when measuring multiple plasma parameters is solved, and high-precision and high-reliability plasma electromagnetic parameter measurement is achieved.
Patent Information
- Application Number
- CN202510485028.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2025-06-20
AI Technical Summary
When measuring multiple plasma parameters, traditional plasma electromagnetic probes have problems such as unreasonable spatial distribution, inability to capture dynamic changes in real time, and insufficient reliability and accuracy in high magnetic field strength and density environments.
An electromagnetic probe for plasma diagnosis was designed, and a probe array was adopted in an array distributed, including a dual probe target, a first suspension potential probe, a polar-direction Mach probe target, a circumferential Mach probe target and two second suspension potential probes. Different probes of the probe array were distributed in two different regions with height differences to ensure that the probes did not interfere with each other during testing.
The ability to measure multiple plasma parameters simultaneously is realized, and the reliability and accuracy of plasma electromagnetic parameters measurement is improved, especially in high magnetic field strength and density environments.
Smart Images
Figure CN120186859A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of plasma electromagnetic diagnosis, and particularly to an electromagnetic probe for plasma diagnosis and an electromagnetic measurement system. Background Art
[0002] In a tokamak magnetic confinement fusion experimental device, the diagnosis of plasma is one of the key technologies to ensure the normal operation of the device, understand the plasma behavior, and optimize the nuclear fusion reaction. To accurately measure the characteristics of plasma, multiple electromagnetic probes are usually required. However, traditional probe technologies often have limitations. For example, the spatial distribution is unreasonable, and multiple parameters of plasma cannot be measured simultaneously, which leads to problems such as the inability to capture the dynamic changes of plasma in real time. Especially in an environment with extremely high magnetic field intensity and plasma density, the reliability and accuracy of traditional probes face severe challenges. Summary of the Invention
[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an electromagnetic probe for plasma diagnosis and an electromagnetic measurement system, aiming to improve the reliability and accuracy of plasma electromagnetic parameter measurement.
[0004] To achieve the above purpose, the present invention adopts the following technical solutions:
[0005] On the one hand, the present invention provides an electromagnetic probe for plasma diagnosis, including a probe array distributed in an array. The probe array includes a double probe pair, a first floating potential probe, a poloidal Mach probe pair, a toroidal Mach probe pair, and two second floating potential probes. The double probe pair and the first floating potential probe are arranged in a first region, and the poloidal Mach probe pair, the toroidal Mach probe pair, and the second floating potential probes are arranged in a second region. The first region and the second region are on the same plane and have a height difference.
[0006] Further, the height difference between the first region and the second region is greater than the height of the probes in the probe array.
[0007] Further, the height difference between the first region and the second region is 3 mm - 4 mm.
[0008] Further, the height of the second region is greater than that of the first region.
[0009] Further, the double probe pair and one of the first floating potential probes are distributed along the magnetic field poloidal direction.
[0010] Further, the first floating potential probe is located between the double probe pair.
[0011] Furthermore, the poloidal Mach probe pair and the two second floating potential probes are distributed along the poloidal direction of the magnetic field.
[0012] Furthermore, the toroidal Mach probe pair is distributed along the toroidal direction of the magnetic field.
[0013] Furthermore, one of the toroidal Mach probe pair is located between the two second floating potential probes, and the other of the toroidal Mach probe pair is located between the poloidal Mach probe pair.
[0014] On the other hand, the present invention also provides an electromagnetic measurement system, including a plurality of the above-mentioned electromagnetic probes for plasma diagnosis, and the plurality of electromagnetic probes for plasma diagnosis are arranged annularly around the plasma.
[0015] The beneficial effects of the present invention compared with the prior art are as follows: An electromagnetic probe for plasma diagnosis includes a probe array distributed in an array. The probe array includes a double probe pair, a first floating potential probe, a poloidal Mach probe pair, a toroidal Mach probe pair, and two second floating potential probes. The double probe pair and the first floating potential probe are arranged in a first region, and the poloidal Mach probe pair, the toroidal Mach probe pair, and the second floating potential probes are arranged in a second region. The first region and the second region are on the same plane and have a height difference. By means of the probe array distributed in an array and distributing different probes of the probe array in two different regions with a height difference, various parameters of the plasma can be measured simultaneously, and the probes in the two regions do not affect each other during the test, thereby improving the reliability and accuracy of the measurement of the electromagnetic parameters of the plasma.
[0016] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other objects, features and advantages of the present invention more obvious and understandable, the following preferred embodiments are specifically described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0018] Figure 1 It is a schematic structural diagram of an electromagnetic probe for plasma diagnosis provided by a specific embodiment of the present invention;
[0019] Figure 2 It is a schematic structural diagram of an electromagnetic measurement system provided by a specific embodiment of the present invention.
[0020] Reference Signs
[0021] 1. Electromagnetic probe for plasma diagnosis; 11. First region; 12. Second region; 13. Dual probe pair; 14. First floating potential probe; 15. Poloidal Mach probe pair; 16. Toroidal Mach probe pair; 17. Second floating potential probe; 18. Sheath; 19. Support; 100. Plasma. Detailed Embodiment
[0022] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention.
[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0025] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0026] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.
[0027] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.
[0028] As Figure 1 shown, an electromagnetic probe 1 for plasma diagnosis provided by an embodiment of the present invention includes a probe array distributed in an array. The probe array includes double probe pairs 13, a first floating potential probe 14, a poloidal Mach probe pair 15, a toroidal Mach probe pair 16, and two second floating potential probes 17. The double probe pairs 13 and the first floating potential probe 14 are disposed in a first region 11, the poloidal Mach probe pair 15, the toroidal Mach probe pair 16, and the second floating potential probes 17 are disposed in a second region 12, and the first region 11 and the second region 12 are on the same plane and have a height difference.
[0029] Specifically, the double probe pairs 13 are mainly used to measure parameters such as the electric field and electron temperature in the plasma, and their working principle is based on the potential difference generated by the two probes in the plasma for calculation; the first floating potential probe 14 can measure the floating potential of the plasma and determine the potential value through the charge exchange balance with the plasma. The poloidal Mach probe pair 15 and the toroidal Mach probe pair 16 are respectively used to measure the flow velocity of the plasma in the poloidal and toroidal directions, and their measurement is based on the relationship between the ion current generated by the Mach probe in the plasma flow and the flow velocity; the two second floating potential probes 17 are also used to measure the floating potential, forming a redundant measurement with the first floating potential probe 14 to improve the reliability of the measurement.
[0030] In one embodiment, as Figure 1As shown, the electromagnetic probe 1 for plasma diagnosis further includes a sheath 18 and a support 19. The sheath 18 can be made of graphite. The sheath 18 is in the shape of a cuboid. The front end face of the sheath 18 constitutes the mounting surface for mounting the probe array. A first region 11 and a second region 12 are defined on the mounting surface. The rear end face of the sheath 18 is fixedly connected to the support 19. The front end face of the sheath 18 is provided with a plurality of needle holes distributed in an array, and all the probes of the probe array are inserted into the needle holes.
[0031] In one embodiment, the height difference between the first region 11 and the second region 12 is achieved by a stepped protrusion designed on the mounting surface of the sheath 18.
[0032] As Figure 1 shown, the double probe pair 13 and a first floating potential probe 14 are distributed along the magnetic field poloidal direction. The first floating potential probe 14 is located between the double probe pairs 13. With such a layout, the space is fully utilized, and relevant parameters in the poloidal direction can be effectively obtained during measurement.
[0033] As Figure 1 shown, the poloidal Mach probe pair 15 and two second floating potential probes 17 are distributed along the magnetic field poloidal direction, and the toroidal Mach probe pair 16 is distributed along the magnetic field toroidal direction. One of the toroidal Mach probe pairs 16 is located between the two second floating potential probes 17, and the other toroidal Mach probe pair 16 is located between the poloidal Mach probe pairs 15. With such a layout, the plasma parameters in the corresponding directions can be accurately measured.
[0034] To achieve the effect of simultaneously measuring multiple plasma parameters without mutual interference, a height difference is provided between the first region 11 and the second region 12. When the height difference is greater than the height of the probes in the probe array, the electromagnetic interference between the probes in different regions and the mutual influence of the plasma flows can be effectively avoided. The specific height difference can be set to 3 mm - 4 mm. As Figure 1 shown, the first region 11 is in a lower position, and the second region 12 is in a higher position through the stepped protrusion, so that the height of the second region 12 is greater than that of the first region 11.
[0035] The electromagnetic probe 1 for plasma diagnosis can simultaneously measure multiple parameters of the plasma, such as electric field, electron temperature, floating potential, poloidal flow velocity, toroidal flow velocity, etc. And because the different probes of the probe array are distributed in two different regions with a height difference, the probes in the two regions do not interfere with each other during testing, greatly improving the reliability and accuracy of the measurement of plasma electromagnetic parameters.
[0036] As Figure 1 and Figure 2As shown in the figure, an embodiment of the present invention further provides an electromagnetic measurement system, which includes a plurality of the above-mentioned electromagnetic probes 1 for plasma diagnosis. The plurality of electromagnetic probes 1 for plasma diagnosis are arranged in a ring around the plasma 100.
[0037] In one embodiment, as Figure 2 shown in the figure, four electromagnetic probes 1 for plasma diagnosis are arranged in a ring around the plasma 100. There are four electromagnetic probes 1 for plasma diagnosis and an associated system. During actual operation, the four electromagnetic probes 1 for plasma diagnosis measure the plasma 100 simultaneously. Since each electromagnetic probe 1 for plasma diagnosis includes various types of probes distributed in an array, such as double probe pairs 13, first floating potential probes 14, poloidal Mach probe pairs 15, toroidal Mach probe pairs 16, and second floating potential probes 17, and different types of probes are distributed in different regions with a height difference, multiple parameters of the plasma 100, such as electric field, electron temperature, floating potential, poloidal flow velocity, and toroidal flow velocity, can be measured simultaneously. After the multiple probes are arranged in a ring, the parameters of the plasma 100 can be obtained from different angles and positions.
[0038] In one embodiment, each electromagnetic probe 1 for plasma diagnosis is connected to a signal acquisition system. The electromagnetic signals of the plasma 100 are captured by the electromagnetic probes 1 for plasma diagnosis, and these electromagnetic signals are transmitted to a computer processing unit through the signal acquisition system for calculation and processing, so as to obtain the relevant test parameters of the plasma 100.
[0039] To ensure the accuracy and real-time nature of the data, the signal acquisition system is also equipped with a high-performance real-time data processing module, which can perform rapid calculation and real-time feedback on the multi-dimensional data of the multiple electromagnetic probes 1 for plasma diagnosis. Through these data, the real-time monitoring and dynamic regulation of the state of the plasma 100 can be realized.
[0040] In one embodiment, the electromagnetic measurement system can also be integrated with other diagnostic systems of the tokamak device (such as a temperature diagnostic system, a density diagnostic system, etc.) to jointly complete the comprehensive diagnosis of the plasma 100. This multi-system integration scheme can provide more comprehensive and accurate physical characteristic data of the plasma 100, helping researchers better understand the behavior of the plasma 100 and optimize the experimental design and control strategy of the nuclear fusion reaction.
[0041] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims
1. An electromagnetic probe for plasma diagnosis, characterized in that: The invention comprises a probe array distributed in an array, wherein the probe array comprises a double probe pair, a first suspended potential probe, a polar Mach probe pair, a circumferential Mach probe pair and two second suspended potential probes, wherein the double probe pair and the first suspended potential probe are arranged in a first area, the polar Mach probe pair, the circumferential Mach probe pair and the second suspended potential probe are arranged in a second area, and the first area and the second area are in the same plane and have a height difference.
2. An electromagnetic probe for plasma diagnosis according to claim 1, characterized in that: A height difference between the first region and the second region is greater than a height of probes in the probe array.
3. An electromagnetic probe for plasma diagnosis according to claim 2, characterized in that: The height difference between the first area and the second area is 3 mm to 4 mm.
4. The electromagnetic probe for plasma diagnosis according to claim 1, characterized in that: The second region has a height greater than that of the first region.
5. The electromagnetic probe for plasma diagnosis according to claim 1, characterized in that: The dual probe pair and the first suspended potential probe are distributed along the polar direction of the magnetic field.
6. The electromagnetic probe for plasma diagnosis according to claim 1, characterized in that: The first floating potential probe is located between the dual probe pair.
7. The electromagnetic probe for plasma diagnosis according to claim 1, characterized in that: The polar Mach probe pair and the two second suspended potential probes are distributed along the polar direction of the magnetic field.
8. The electromagnetic probe for plasma diagnosis according to claim 1, characterized in that: The toroidal Mach probe pair is distributed along the toroidal direction of the magnetic field.
9. The electromagnetic probe for plasma diagnosis according to claim 1, characterized in that: One of the circumferential Mach probes is located between the two second suspended potential probes, and the other of the circumferential Mach probes is located between the polar Mach probes.
10. An electromagnetic measurement system, comprising a plurality of electromagnetic probes for plasma diagnosis according to any one of claims 1 to 9, wherein the plurality of electromagnetic probes for plasma diagnosis are arranged in a ring around a plasma.