CN113543440A - Real-time alfen model control system and method based on electron cyclotron - Google Patents
Real-time alfen model control system and method based on electron cyclotron Download PDFInfo
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Abstract
The invention belongs to the technical field of active control, and particularly relates to an alfen model real-time control system and method based on an electron cyclotron. In the invention, a multi-channel electron cyclotron radiometer, a multi-channel microwave reflectometer and a Mirnov probe are connected with a magnetic confinement high-temperature plasma and an Arfen mode intelligent identification algorithm, the Arfen mode intelligent identification and control algorithm is connected with a central processing unit, the central processing unit is connected with an electron cyclotron resonance heating control system, the electron cyclotron resonance heating control system is connected with a gyrotron, the gyrotron is sequentially connected with a groove wave guide, a vacuum flange and a controllable angle antenna system, and the controllable angle antenna system is connected with the magnetic confinement high-temperature plasma. The invention can measure the basic information such as the space position of the alfen model with high space-time resolution in real time, rapidly and intelligently complete the identification and the identification of the alfen model and accurately control the microwave injection angle so as to realize the real-time control of the alfen model.
Description
Technical Field
The invention belongs to the technical field of active control, and particularly relates to an alfen model real-time control system and method based on an electron cyclotron.
Technical Field
There are a large number of high energy particles, such as fast electrons, fast ions, and alpha particles, in the magnetically confined plasma. The interaction of the high-energy particles and the alfen wave can excite different types of alfen modes, mainly including an alfen eigenmode and a high-energy particle mode. Evidence suggests that these instabilities are highly likely to disrupt the ring symmetry enhancing transport leading to a large loss of high energy particles and, in severe cases, even burning of the first wall of the magnetic confinement device. This is extremely disadvantageous to maintaining nuclear fusion reactions, obtaining high gains of fusion, and safe operation of the magnetic confinement fusion device. In addition, the alfen film lowers the efficiency of the external auxiliary heating to cause a serious waste of resources. Therefore, in order to avoid the potential hazard of alformol, effective methods must be employed for control and mitigation. At present, the technical methods capable of effectively controlling or relieving the alfen mode mainly include high momentum neutral beam injection, electron cyclotron resonance heating/electron cyclotron current drive (ECRH/ECCD), resonance magnetic disturbance, and the like. However, both methods of high momentum neutral beam injection and resonant magnetic perturbation mitigation and suppression of the alfen mode have been successfully achieved on only a very few devices, where the underlying physical mechanisms still need to be further studied. ECRH/ECCD mitigation and control of the Alifene model are relevant in several experimental settings. Research shows that ECRH/ECCD reduces high-energy particle drive by reducing high-energy particle pressure at the local position of the alfen mode, and realizes the alleviation and inhibition of the alfen mode by changing the damping mechanism of a continuous spectrum damping enhanced mode. But no other device worldwide can develop real-time control of the alfen model, except the us DIII-D device successfully achieves neutral beam active control of alfen. In order to avoid the plasma confinement performance reduction caused by the alfen mode, the invention provides a real-time control method for realizing the alfen mode based on electron cyclotron resonance heating/current driving and combined with a high space-time resolution real-time measurement technology, a rapid intelligent identification technology and a precise controllable radio frequency wave injection technology.
Disclosure of Invention
The invention aims to provide an alfen model real-time control system and method based on electron cyclotron waves, which can measure basic information such as the space position of the alfen model in real time and high space-time resolution, rapidly and intelligently complete the identification and the identification of the alfen model and accurately control the microwave injection angle so as to realize the real-time control of the alfen model.
The technical scheme adopted by the invention is as follows:
an alfen mode real-time control system based on electron cyclotron waves comprises a magnetic confinement high-temperature plasma, a high-space-time resolution electron cyclotron radiometer, a multi-channel reflectometer, a Mirnofu probe, an alfen mode rapid intelligent recognition algorithm, a central processing unit, an electron cyclotron resonance heating control system, a gyrotron and a grooved waveguide, the device comprises a vacuum flange, a controllable angle antenna system, a multi-channel electronic cyclotron radiometer, a multi-channel microwave reflectometer, a Mirnofu probe, a magnetic confinement high-temperature plasma and an Arfen mode intelligent recognition algorithm, an Arfen mode intelligent recognition and control algorithm is connected with a central processing unit, the central processing unit is connected with an electronic cyclotron resonance heating control system, the electronic cyclotron resonance heating control system is connected with a gyrotron, the gyrotron is sequentially connected with a grooved waveguide, the vacuum flange and the controllable angle antenna system, and the controllable angle antenna system is connected with the magnetic confinement high-temperature plasma.
And the electronic cyclotron resonance heating control system is connected with the angle-controllable antenna system.
The multichannel electron cyclotron radiometer is used for measuring an alfen mode radial mode structure formed by temperature disturbance.
The measurement method comprises the steps of carrying out Fourier transform on signals collected by the multi-channel electron cyclotron radiometer in the plasma discharge process, finding out the frequency range of an alpha mode through frequency spectrum analysis, carrying out numerical filtering, and selecting temperature disturbances at the same time and different positions to combine into a radial distribution.
The radial distribution is a radial mode structure of the alfen mode, and the maximum value is the spatial position of the alfen mode.
The microwave reflectometer is used for measuring an alfen mode radial mode structure formed by electronic disturbance.
The measuring method comprises the steps of carrying out Fourier transform on signals collected by a microwave reflectometer in the plasma discharging process, finding out the frequency range of an alpha mode through frequency spectrum analysis, then carrying out numerical filtering, and selecting density disturbances at the same time and different positions to combine into a radial distribution.
The radial distribution is the radial mode structure of the alfen mode, and the maximum value is the spatial position of the alfen mode.
The milnoff probe is used for measuring the annular modulus and the polar modulus of the alfen mode, wherein the annular modulus is measured by the annular milnoff probe, and the polar milnoff probe is measured by the polar milnoff probe.
The measurement method is as follows: in the plasma discharging process, Fourier transform is carried out on signals acquired by the Mirnofu probe, the frequency range of an alfen mode is found through spectrum analysis, then, numerical filtering is carried out on all probe signals, a peak reference point of a first channel is selected, phases of adjacent peaks of the probe signals of each channel are sequentially compared, and the phase difference of the first probe and the last probe is observed; the modulus is 1 when the phase difference is 2 pi, 2 when the phase difference is 4 pi, and so on.
A control method of an alfen model real-time control system based on electron cyclotron waves measures the modulus, amplitude and space position information of an alfen model excited by high-energy particles in magnetically confined high-temperature plasma in real time through a high-space-time resolution electron cyclotron radiometer, a multi-channel reflectometer and a Mirnofu probe, an alfen model intelligent identification and control algorithm is based on the high-space-time resolution electron cyclotron radiometer, the input data of the multi-channel reflectometer and the Mirnov probe are identified in a matched mode, the power, the incident angle and the deposition position of the electron cyclotron wave required by the mode can be effectively inhibited are given, the output result is fed back to the central processing unit, then the central processing unit sends an instruction to the electron cyclotron control system, the cyclotron pipe is put into work after receiving a starting instruction of the electron cyclotron control system, and high-power microwaves are injected into the specified position of the magnetically-confined high-temperature plasma through the groove wave guide, the vacuum flange and the angle-controllable antenna system.
The electronic convolution control system directly sends an instruction to the angle-controllable antenna system so as to realize the change of the microwave injection angle.
The invention has the advantages that the invention can measure the basic information such as the space position of the alfen model with high space-time resolution in real time, rapidly and intelligently complete the identification and the identification of the alfen model and can accurately control the microwave injection angle so as to realize the real-time control of the alfen model.
Drawings
Fig. 1 is a structural diagram of an alfen model real-time control system based on an electron cyclotron wave provided by the present invention;
FIG. 2 is a graph of ECRH-effective mitigation and inhibition of high energy particle-driven fishbone modeling on an HL-2A device.
In the figure: the system comprises a 1-magnetic confinement high-temperature plasma, a 2-high space-time resolution electron cyclotron radiometer, a 3-multichannel reflectometer, a 4-Millnoff probe, a 5-Alifen mode rapid intelligent recognition algorithm, a 6-central processing unit, a 7-ECRH control system, an 8-gyrotron, a 9-groove waveguide, a 10-vacuum flange and a 11-controllable angle antenna system.
Detailed Description
The present invention provides a real-time alfendie control system and method based on an electron cyclotron wave, which is further described with reference to the accompanying drawings.
As shown in figure 1, the alfen mode real-time control system based on the electron cyclotron comprises a magnetic confinement high-temperature plasma 1, a high-space-time resolution electron cyclotron radiometer 2, a multi-channel reflectometer 3, a Millov probe 4, an alfen mode fast intelligent identification algorithm 5, a central processing unit 6, an ECRH control system 7, a gyrotron 8, a grooved waveguide 9, a vacuum flange 10 and a controllable angle antenna system 11, wherein the multi-channel electron cyclotron radiometer 2, the multi-channel microwave reflectometer 3, the Millov probe 4 are connected with the magnetic confinement high-temperature plasma 1 and the alfen mode intelligent identification algorithm 5, the alfen mode intelligent identification and control algorithm 5 is connected with the central processing unit 6, the central processing unit 6 is connected with the electron cyclotron resonance heating control system 7, the electron cyclotron resonance heating control system 7 is connected with the gyrotron 8 and the controllable angle antenna system 11, the gyrotron 8 is sequentially connected with a grooved waveguide 9, a vacuum flange 10 and a controllable angle antenna system 11, and the controllable angle antenna system 11 is connected with the magnetic confinement high-temperature plasma 1.
The multi-channel electron cyclotron radiometer 2 is mainly used for measuring temperature disturbances, and in the embodiment, for measuring the radial mode structure of the alfen mode constituted by the temperature disturbances. The specific method is that in the plasma discharge process, Fourier transform is carried out on signals collected by the multi-channel electron cyclotron radiometer 2, the frequency range of an alpha mode is found through frequency spectrum analysis, then numerical filtering is carried out, and temperature disturbances of different measurement channels (different positions) at the same time are selected to be combined into a radial distribution. The radial distribution is the radial mode structure of the alfen mode, and the maximum value is the spatial position of the alfen mode.
The microwave reflectometer 3 is mainly used for measuring density perturbations and in the example for measuring the formation of the alfen mode radial mode structure from electronic perturbations (different alfen modes have different effects on temperature and density perturbations). The specific method is that during the plasma discharge process, Fourier transform is carried out on the signals collected by the microwave reflectometer 3, the frequency range of the alfen mode is found through frequency spectrum analysis, then numerical filtering is carried out, and density disturbances of different measurement channels (different positions) at the same time are selected to be combined into a radial distribution. The radial distribution is the radial mode structure of the alfen mode, and the maximum value is the spatial position of the alfen mode.
The milnoff probe 4 is mainly used for measuring disturbance, and in the embodiment, is used for measuring the circumferential modulus and polar modulus of the alfen mode, wherein the circumferential modulus is measured by the circumferential milnoff probe, and the polar milnoff probe is measured by the polar milnoff probe, and the specific measurement method is as follows: in the plasma discharge process, Fourier transformation is carried out on the signal collected by the Mirnov probe 4Changeable pipeFinding out the frequency range of the alfen mode through spectrum analysis, then carrying out numerical filtering on all probe signals, selecting a peak reference point of a first channel, sequentially comparing the phases of adjacent peaks of the probe signals of all channels, and observing the first probe signalThe phase difference of the needle and the last probe. The modulus is 1 when the phase difference is 2 pi, 2 when the phase difference is 4 pi, and so on.
The specific control method comprises the following steps: the modulus, the amplitude, the spatial position and other information of an alfen mode excited by high-energy particles in the magnetically confined high-temperature plasma 1 are measured in real time through a high-time-space resolution electron cyclotron radiometer 2, a multi-channel reflectometer 3 and a Mironov probe 4, the Arfen mode intelligent identification and control algorithm 5 identifies the mode according to input data of the high-space-time-resolution electronic cyclotron radiometer 2, the multi-channel reflectometer 3 and the Mirnov probe 4, gives out electronic cyclotron power, an incidence angle, a deposition position and the like which can effectively inhibit the mode, outputs a result and feeds the result back to the central processing unit 6, the central processing unit 6 sends an instruction to the electronic cyclotron control system 7, the gyrotron 8 is thrown into work after receiving a starting instruction of the electronic cyclotron control system 7, and high-power microwaves are injected into a specified position of the magnetically-confined high-temperature plasma 1 through the grooved waveguide 9, the vacuum flange 10 and the angle-controllable antenna system 11. The ECRH control system 7 can also directly send instructions to the angle-controllable antenna system 11 so as to realize the change of the microwave injection angle.
Fig. 2 is a specific example of an effective ECRH mitigation and inhibition of high energy particle driven fish bone molding on an HL-2A device (fish bone molding belongs to one of the alefin molds). The left chart keeps the ECRH injection power 1.0MHz unchanged, and changes the ECRH deposition position; the right panel maintains the ECRH deposition position and changes the ECRH implant power. As a result, when the power is kept constant, the mitigation effect is best when the deposition position is 0.42 (near the fish bone model local position); when the deposition position is fixed at 0.42, the mitigation effect is optimized with increasing ECRH power. The experimental result shows that when the power of the electron cyclotron resonance heating is 1MW and the deposition position is 0.42, the control effect of the fishbone model is optimal. The specific method is further illustrated with reference to fig. 1: when a fishbone model is excited in the magnetic confinement high-temperature plasma 1, basic information such as model frequency, amplitude, spatial position and the like is measured by using the multi-channel electron cyclotron radiometer 2, the multi-channel microwave reflectometer 3 and the milnoff probe 4, and then an alfen model intelligent identification and control algorithm 5 gives out the electron cyclotron power 1.0MHz and the deposition position 0.42 which are required for effectively inhibiting the fishbone model according to input data of the high-space-time resolution electron cyclotron radiometer 2, the multi-channel reflectometer 3 and the milnoff probe 4. The central processing unit 6 receives the input data of the intelligent Alfen model identification and control algorithm 5 and then sends an instruction to the electronic convolution control system 7, and the electronic convolution tube 8 immediately enters a working state after receiving the control instruction of the electronic convolution control system 7, namely, the electronic convolution wave of 1.0MHz is injected into the position of 0.42 of the magnetically-confined high-temperature plasma, thereby realizing the effective control of the fishbone model.
Claims (12)
1. An alfen model real-time control system based on electron cyclotron is characterized in that: comprises a magnetic confinement high-temperature plasma (1), a high-space-time resolution electronic cyclotron radiometer (2), a multi-channel reflectometer (3), a Millov probe (4), an Alfen mode rapid intelligent identification algorithm (5), a central processing unit (6), an electronic cyclotron resonance heating control system (7), a gyrotron (8), a grooved waveguide (9), a vacuum flange (10) and a controllable angle antenna system (11), wherein the multi-channel electronic cyclotron radiometer (2), the multi-channel microwave reflectometer (3) and the Millov probe (4) are connected with the magnetic confinement high-temperature plasma (1) and the Alfen mode intelligent identification algorithm (5), the Alfen mode intelligent identification and control algorithm (5) is connected with the central processing unit (6), the central processing unit (6) is connected with the electronic cyclotron resonance heating control system (7), and the electronic cyclotron resonance heating control system (7) is connected with the gyrotron (8), the gyrotron (8) is sequentially connected with a grooved waveguide (9), a vacuum flange (10) and a controllable angle antenna system (11), and the controllable angle antenna system (11) is connected with the magnetic confinement high-temperature plasma (1).
2. The real-time alfen model control system based on electron cyclotron wave as claimed in claim 1, wherein: the electron cyclotron resonance heating control system (7) is connected with the angle controllable antenna system (11).
3. The real-time alfen model control system based on electron cyclotron wave as claimed in claim 1, wherein: the multichannel electron cyclotron radiometer (2) is used for measuring an alpha mode radial mode structure formed by temperature disturbance.
4. The real-time alfen model control system based on electron cyclotron wave of claim 3, wherein: the measurement method comprises the steps of carrying out Fourier transform on signals collected by the multi-channel electron cyclotron radiometer (2) in the plasma discharge process, finding out the frequency range of an alpha mode through frequency spectrum analysis, carrying out numerical filtering, and selecting temperature disturbances at the same time and different positions to combine into a radial distribution.
5. The real-time alfen model control system based on electron cyclotron wave of claim 4, wherein: the radial distribution is a radial mode structure of the alfen mode, and the maximum value is the spatial position of the alfen mode.
6. The real-time alfen model control system based on electron cyclotron wave as claimed in claim 1, wherein: the microwave reflectometer (3) is used for measuring the radial mode structure of the alpha mode formed by electronic disturbance.
7. The real-time alfen model control system based on electron cyclotron wave of claim 6, wherein: the measuring method comprises the steps of carrying out Fourier transform on signals collected by the microwave reflectometer (3) in the plasma discharging process, finding out the frequency range of an alpha mode through frequency spectrum analysis, then carrying out numerical filtering, and selecting density disturbances at the same time and different positions to combine into a radial distribution.
8. The real-time alfen model control system based on electron cyclotron wave of claim 7, wherein: the radial distribution is the radial mode structure of the alfen mode, and the maximum value is the spatial position of the alfen mode.
9. The real-time alfen model control system based on electron cyclotron wave as claimed in claim 1, wherein: the milnoff probe (4) is used for measuring the circumferential modulus and the polar modulus of the alfen mode, wherein the circumferential modulus is measured by the circumferential milnoff probe, and the polar milnoff probe is measured by the polar milnoff probe.
10. The system according to claim 9, wherein the real-time control system for alfen model based on electron cyclotron wave comprises: the measurement method is as follows: in the plasma discharging process, Fourier transform is carried out on signals collected by the Mirnofu probe (4), the frequency range of an alfen mode is found through spectrum analysis, then numerical filtering is carried out on all probe signals, a peak reference point of a first channel is selected, phases of adjacent peaks of probe signals of each channel are sequentially compared, and the phase difference of the first probe and the last probe is observed; the modulus is 1 when the phase difference is 2 pi, 2 when the phase difference is 4 pi, and so on.
11. The control method of the real-time alfen model control system based on the electron cyclotron wave as claimed in claim 2, wherein: the modulus, the amplitude and the spatial position information of an alfen mode excited by high-energy particles in a magnetically confined high-temperature plasma (1) are measured in real time through a high-space-time resolution electronic cyclotron radiometer (2), a multi-channel reflectometer (3) and a Mirnov probe (4), an alfen mode intelligent identification and control algorithm (5) identifies the mode according to input data of the high-space-time resolution electronic cyclotron radiometer (2), the multi-channel reflectometer (3) and the Mirnov probe (4) and gives out electronic cyclotron wave power, an incidence angle and a deposition position which can effectively inhibit the mode, an output result is fed back to a central processing unit (6), the central processing unit (6) sends an instruction to an electronic cyclotron control system (7), a gyrotron (8) is thrown into work after receiving a starting instruction of the electronic cyclotron control system (7), and high-power microwaves are transmitted to a grooved waveguide (9), The vacuum flange (10) and the angle-controllable antenna system (11) are injected into the designated position of the magnetic confinement high-temperature plasma (1).
12. The real-time alfen model control method based on the electron cyclotron wave as claimed in claim 11, wherein: the electronic convolution control system (7) directly sends an instruction to the angle-controllable antenna system (11) so as to realize the change of the microwave injection angle.
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