Alfen eigenmode active control device

Abstract

The invention provides an Alfen eigenmode active control device which comprises a high-frequency power supply remote control system, a high-frequency power supply, an antenna backboard support, a high-frequency magnetic probe and an Alfen eigenmode antenna, a high-frequency magnetic field is generated on the Alfen eigenmode antenna, the high-frequency magnetic field is spread into plasma, an Alfen eigenmode with the frequency of 40-300 kHz is actively excited, and the Alfen eigenmode is controlled to be in a high-frequency state. A high-frequency magnetic field emitted by a high-frequency power supply is detected by a high-frequency magnetic probe, and an Alfen eigenmode (AE mode) actively excited by plasma is detected by the high-frequency magnetic probe. The device can realize continuous active excitation of a plurality of Alfen eigenmodes, and is used for active excitation of the Alfen eigenmodes in a nuclear fusion device.

Description

Technical Field

[0001] The invention belongs to the field of nuclear fusion Alfvén eigenmode control, and in particular relates to an Alfvén eigenmode active control device. Background Art

[0002] The burning plasma in future fusion reactors will generate a large number of high-energy particles (including ions and electrons). These high-energy particles will excite a large number of Alfvén eigenmodes. These Alfvén eigenmodes will in turn enhance the outward transport of high-energy particles, bombarding internal components of the reactor, reducing the economic efficiency of the fusion reactor and potentially damaging the device, endangering its safe operation.

[0003] Alfvén eigenmodes are magnetic perturbation modes that can be actively excited and controlled by matching the frequency of the magnetic perturbation to the Alfvén eigenmode. Studying the mechanisms for actively exciting and damping these instabilities has important scientific value and application prospects for effectively controlling Alfvén eigenmodes and other instabilities. Therefore, the development of active control devices for Alfvén eigenmodes is of great significance to the operation of future fusion reactors. Alfvén eigenmode antennas have been designed on JET, C-Mod, and MAST to stimulate Alfvén eigenmodes. However, these systems have a series of problems: (1) They have a high temperature rise and can only be used in short pulses, which cannot meet the active control requirements of fusion reactors above the thousand-second level; (2) The antennas are exposed in the vacuum chamber and are easily damaged by particle bombardment or short-circuited by metal coatings, resulting in long-term use; (3) The antenna types are single and cannot evaluate the transport effect caused by nonlinear coupling between different Alfvén eigenmodes; (4) There is no direct diagnosis of the high-frequency signal of the detection coil in the device, making it impossible to determine whether the antenna is damaged; (5) The device requires the help of an external high-frequency magnetic probe to detect the Alfvén eigenmode, and cannot directly provide the detection results through the device itself. Therefore, it is necessary to design a new Alfvén eigenmode control device to solve the above problems. Summary of the Invention

[0004] In order to solve the above technical problems and realize active control of Alfvén eigenmodes, the present invention proposes an Alfvén eigenmode active control device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An Alfvén eigenmode active control device includes a high-frequency power supply remote control system, a high-frequency power supply, an antenna backplate bracket, multiple high-frequency magnetic probes, and an Alfvén eigenmode antenna; the high-frequency power supply remote control system is connected to the high-frequency power supply; the high-frequency power supply is connected to the antenna to provide energy for the antenna; the antenna backplate bracket supports the Alfvén eigenmode antenna; the multiple high-frequency magnetic probes are installed on the antenna backplate bracket for monitoring the magnetic field; the Alfvén eigenmode antennas are all installed on the antenna backplate bracket to receive energy from the high-frequency power supply.

[0007] Furthermore, the high-frequency power supply remote control system is the first high-frequency power supply remote control system and the second high-frequency power supply remote control system, the high-frequency power supplies are the first high-frequency power supply and the second high-frequency power supply respectively, the Alfvén eigenmode antennas are the first Alfvén eigenmode antenna and the second Alfvén eigenmode antenna respectively; the multiple high-frequency magnetic probes are the first high-frequency magnetic probe, the second high-frequency magnetic probe, and the third high-frequency magnetic probe respectively.

[0008] Furthermore, the first high-frequency power supply remote control system and the second high-frequency power supply remote control system control the first high-frequency power supply and the second high-frequency power supply, so that a high-frequency magnetic field is generated on the first Alfvén eigenmode antenna and the second Alfvén eigenmode antenna. The high-frequency magnetic field propagates into the plasma, actively exciting the Alfvén eigenmode with a frequency of 40-300kHz, and the Alfvén eigenmode actively excited by the plasma is detected via the first high-frequency magnetic probe, the second high-frequency magnetic probe and the third high-frequency magnetic probe.

[0009] Furthermore, the antenna back plate bracket is made of 316L stainless steel, and in order to prevent the high-frequency magnetic field from being shielded, the front side of the antenna back plate bracket is cut.

[0010] Furthermore, it also includes an antenna protection cover, which uses a 95% alumina ceramic cover to ensure that the high-frequency magnetic field generated by the antenna is not shielded and at the same time meets the requirements of resistance to high-speed bombardment by high-energy particles.

[0011] Furthermore, the 95% alumina ceramic cover is fixed by a 316L stainless steel protective cover to ensure that the 95% alumina ceramic cover does not fall off.

[0012] Furthermore, the antenna's conductor material is made of multiple layers of glass ribbon woven around multiple strands of oxygen-free copper. The multiple layers of glass ribbon ensure the antenna's insulation properties, and the selection of oxygen-free copper material ensures an extremely low temperature rise during the use of the antenna.

[0013] Furthermore, the high-frequency magnetic probe can not only detect the high-frequency magnetic field emission of the antenna in real time, but also measure the Alfvén eigenmode excited by the antenna in the plasma.

[0014] Furthermore, the first Alfvén eigenmode antenna and the second Alfvén eigenmode antenna use different numbers of turns, so that the antennas can simultaneously excite Alfvén eigenmodes of different frequencies, and directly study the nonlinear interaction between the Alfvén eigenmodes.

[0015] Furthermore, it is suitable for active excitation and control of Alfvén eigenmodes in nuclear fusion devices, achieving continuous excitation on the order of thousands of seconds and real-time detection of the generated Alfvén eigenmodes.

[0016] Beneficial effects:

[0017] The present invention can realize continuous active excitation of Alfvén eigenmodes in a single or multiple frequency bands through remote control. It is suitable for active excitation and control of Alfvén eigenmodes in nuclear fusion devices. It can realize continuous excitation on the order of thousands of seconds and can detect the generated Alfvén eigenmodes in real time. At the same time, the two groups of antennas have different numbers of turns, which can simultaneously excite Alfvén eigenmodes of different frequencies, and can directly study the nonlinear interactions between different Alfvén eigenmodes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of an Alfvén eigenmode active control device of the present invention.

[0019] Among them, the figures are marked as: the first high-frequency power supply remote control system 1, the second high-frequency power supply remote control system 2, the first high-frequency power supply 3, the second high-frequency power supply 4, the antenna backplane bracket 5, the first high-frequency magnetic probe 6, the second high-frequency magnetic probe 7, the third high-frequency magnetic probe 8, the first Alfvén eigenmode antenna 9, and the second Alfvén eigenmode antenna 10. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0021] like Figure 1 As shown, an Alfvén eigenmode active control device according to an embodiment of the present invention includes a first high-frequency power supply remote control system 1, a second high-frequency power supply remote control system 2, a first high-frequency power supply 3, a second high-frequency power supply 4, an antenna backplane support 5, a first high-frequency magnetic probe 6, a second high-frequency magnetic probe 7, a third high-frequency magnetic probe 8, a first Alfvén eigenmode antenna 9, and a second Alfvén eigenmode antenna 10. The first high-frequency power supply remote control system 1 is connected to the first high-frequency power supply 3. The second high-frequency power supply remote control system 2 is connected to the second high-frequency power supply 4. Both the first high-frequency power supply 3 and the second high-frequency power supply 4 are connected to the first Alfvén eigenmode antenna 9 and the second Alfvén eigenmode antenna 10 to provide energy to the antennas. The antenna backplane support 5 supports the first Alfvén eigenmode antenna 9 and the second Alfvén eigenmode antenna 10. The first high-frequency magnetic probe 6, the second high-frequency magnetic probe 7, and the third high-frequency magnetic probe 8 are mounted on the antenna backplane support 5 to monitor the magnetic field. The first Alfvén eigenmode antenna 9 and the second Alfvén eigenmode antenna 10 are also mounted on the antenna backplane bracket 5 to receive energy from a high-frequency power supply.

[0022] The first high-frequency power supply remote control system 1 and the second high-frequency power supply remote control system 2 respectively control the first high-frequency power supply 3 and the second high-frequency power supply 4, so that a high-frequency magnetic field is generated on the first Alfvén eigenmode antenna 9 and the second Alfvén eigenmode antenna 10. The high-frequency magnetic field propagates into the plasma, actively exciting the Alfvén eigenmode with a frequency of 40-300kHz, and the Alfvén eigenmode (AE mode) actively excited by the plasma is detected via the first high-frequency magnetic probe 6, the second high-frequency magnetic probe 7 and the third high-frequency magnetic probe 8.

[0023] Preferably, the antenna back plate bracket 5 is made of 316L stainless steel, and in order to prevent the high-frequency magnetic field from being shielded, the front side of the frame is cut.

[0024] Preferably, the antenna protection cover adopts a 95% alumina ceramic cover plate to ensure that the high-frequency magnetic field generated by the antenna is not shielded and at the same time meets the characteristics of resistance to high-speed bombardment of high-energy particles.

[0025] Preferably, the 95% alumina ceramic cover is fixed by a 316L stainless steel protective cover to ensure that the ceramic cover does not fall off.

[0026] Preferably, the antenna conductor material is made of multiple layers of glass ribbons woven around multiple strands of oxygen-free copper. The multiple layers of glass ribbons ensure the insulation properties of the antenna, and the selection of oxygen-free copper material ensures extremely low temperature rise during the use of the antenna.

[0027] Preferably, the high-frequency magnetic probe in the system can detect the high-frequency magnetic field emission of the antenna in real time, provide the operation status of the antenna in real time, and measure the Alfvén eigenmode excited by the antenna in the plasma, thereby realizing the integration of multiple functions.

[0028] Preferably, the two groups of antennas use different numbers of turns, so that the antennas can simultaneously excite Alfvén eigenmodes of different frequencies, and the nonlinear interaction between the Alfvén eigenmodes can be directly studied.

Claims

1. An Alfvén eigenmode active control device, characterized in that: It includes a high-frequency power supply remote control system, a high-frequency power supply, an antenna backplane bracket, multiple high-frequency magnetic probes, and an Alfvén eigenmode antenna; the high-frequency power supply remote control system is connected to the high-frequency power supply; the high-frequency power supply is connected to the antenna to provide energy for the antenna; The antenna backplane bracket supports the Alfvén eigenmode antenna; Multiple high-frequency magnetic probes are installed on the antenna backplane bracket to monitor the magnetic field; Alfvén eigenmode antennas are all installed on the antenna backplane bracket to receive energy from the high-frequency power supply.

2. The Alfvén eigenmode active control device according to claim 1, characterized in that: The high-frequency power supply remote control systems are the first high-frequency power supply remote control system and the second high-frequency power supply remote control system, the high-frequency power supplies are the first high-frequency power supply and the second high-frequency power supply, the Alfvén eigenmode antennas are the first Alfvén eigenmode antenna and the second Alfvén eigenmode antenna; the multiple high-frequency magnetic probes are the first high-frequency magnetic probe, the second high-frequency magnetic probe, and the third high-frequency magnetic probe.

3. The Alfvén eigenmode active control device according to claim 2, characterized in that: The first high-frequency power supply remote control system and the second high-frequency power supply remote control system control the first high-frequency power supply and the second high-frequency power supply, so that a high-frequency magnetic field is generated on the first Alfvén eigenmode antenna and the second Alfvén eigenmode antenna. The high-frequency magnetic field propagates into the plasma, actively exciting the Alfvén eigenmode with a frequency of 40-300kHz, and the Alfvén eigenmode actively excited by the plasma is detected by the first high-frequency magnetic probe, the second high-frequency magnetic probe and the third high-frequency magnetic probe.

4. The Alfvén eigenmode active control device according to claim 1, characterized in that: The antenna backplane bracket is made of 316L stainless steel, and in order to prevent the high-frequency magnetic field from being shielded, the front of the antenna bracket is notched.

5. The Alfvén eigenmode active control device according to claim 1, characterized in that: It also includes an antenna protection cover, which uses a 95% alumina ceramic cover to ensure that the high-frequency magnetic field generated by the antenna is not shielded and at the same time meets the requirements of resistance to high-speed bombardment by high-energy particles.

6. The Alfvén eigenmode active control device according to claim 5, characterized in that: The 95% alumina ceramic cover is fixed by a 316L stainless steel protective cover to ensure that the 95% alumina ceramic cover does not fall off.

7. The Alfvén eigenmode active control device according to claim 1, characterized in that: The antenna's conductor material is made of multiple layers of glass ribbon woven around multiple strands of oxygen-free copper. The multiple layers of glass ribbon ensure the antenna's insulation properties, and the choice of oxygen-free copper ensures extremely low temperature rise during the use of the antenna.

8. The Alfvén eigenmode active control device according to claim 1, characterized in that: The high-frequency magnetic probe can not only detect the high-frequency magnetic field emission of the antenna in real time, but also measure the Alfvén eigenmode excited by the antenna in the plasma.

9. The Alfvén eigenmode active control device according to claim 1, characterized in that: The first Alfvén eigenmode antenna and the second Alfvén eigenmode antenna use different numbers of turns, which allows the antennas to simultaneously excite Alfvén eigenmodes of different frequencies, allowing for direct study of the nonlinear interaction between the Alfvén eigenmodes.

10. The Alfvén eigenmode active control device according to claim 1, characterized in that: It is suitable for active excitation and control of Alfvén eigenmodes in nuclear fusion devices, achieving continuous excitation on the order of thousands of seconds and real-time detection of the generated Alfvén eigenmodes.

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