Method and device for adjusting plasma center position based on magnetic confinement

Abstract

The invention relates to the technical field of light sources, particularly discloses a method and a device for adjusting the central position of a plasma, and aims to realize accurate positioning and stable control of the plasma by accurately controlling output parameters of a magnetic field generator. According to the method, a magnetic field generator with a specific shape and distribution is utilized, a magnetic field with a closed magnetic line structure is generated in a plasma chamber, charged particles in plasma are guided to move along a preset path, and it can be ensured that the plasma reaches and is kept at an expected position by monitoring and adjusting magnetic field parameters in real time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plasma physics and light source, in particular to a method and device for adjusting the center position of plasma based on magnetic confinement. BACKGROUND

[0002] In plasma physics, magnetic confinement is an important technical means for confining high-temperature and high-density plasma in a specific area to maintain its stability and controllability. As a gas discharge light source, the plasma of a xenon lamp exhibits unique motion characteristics under the action of a magnetic field, that is, electrons and ions will do cyclotron motion along the magnetic force line, while the neutral components are basically not affected. However, the traditional magnetic confinement method has limitations in accurately controlling the position of the plasma, which is difficult to meet the needs of specific application scenarios.

[0003] The method of magnetic confinement can use a magnetic mirror, and the structure of the plasma confinement region of the magnetic mirror is like a spindle. The principle is that part of the charged particles (the vertical component of the velocity relative to the direction of the magnetic force line is greater than a certain critical value) will be reflected back from the end with a stronger magnetic field, thereby forming a confinement region in the middle part with a weaker magnetic field. The additional complex magnetic field ensures the macroscopic stability of the plasma.

[0004] In the plasma of a xenon lamp, electrons and ions will be confined by the magnetic field and do cyclotron motion along the magnetic force line. This motion helps to maintain the stability of the plasma, which is limited within a certain spatial range, thereby achieving effective control of the plasma. The method of magnetic confinement can also be a closed magnetic force line method. In the magnetic field of closed magnetic force lines, charged particles will not escape the confinement region along the magnetic force line, but due to the ring-shaped inhomogeneity, particles can drift across the magnetic field, and the drift directions of electrons and ions are opposite, thus causing charge separation. The electric field in this process has a destructive effect on the overall confinement. The solution is to cause the magnetic field along the radial direction of the ring (the "poloidal" magnetic field), also known as the rotational transformation of the magnetic force line, so that the magnetic force line becomes a ring-shaped spiral. In this way, the orbits of most particles will be closed, and the overall macroscopic stability of the plasma can be ensured by optimizing the design of the overall magnetic field. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a method for adjusting the center position of plasma based on magnetic confinement, which realizes flexible control and stable maintenance of the position of plasma by optimizing the magnetic confinement structure.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] On the one hand, the present application provides a method for adjusting the center position of plasma based on magnetic confinement, characterized in that it comprises the following steps:

[0008] S1. At least one magnetic field generator is arranged inside or around the plasma chamber to generate a magnetic field of closed magnetic field lines structure, wherein the magnetic field generators are arranged symmetrically or asymmetrically around the central axis or a predetermined center point of the plasma chamber to generate a magnetic field of closed magnetic field lines structure inside the chamber;

[0009] S2. The magnetic field generated by the magnetic field generator includes a "polar" magnetic field along the radial direction of the ring, which, combined with the closed magnetic field lines around the plasma, forms a ring-shaped solenoid-shaped magnetic field layout to effectively constrain and guide the charged particles in the plasma;

[0010] S3. Start the light source device to generate plasma in the plasma chamber;

[0011] S4. By controlling the output parameters of the magnetic field generator, the shape, strength and distribution of the magnetic field are dynamically adjusted to guide the charged particles in the plasma to make cyclotron motion along the preset path, thereby changing the overall position of the plasma;

[0012] S5. Real-time monitoring of the position of the plasma, and adjusting the magnetic field parameters according to the deviation between the target position and the actual position, until the plasma reaches the desired light-emitting position and remains stable.

[0013] Preferably, the magnetic field generator includes a plurality of independently controlled coils or permanent magnets for precise control of the distribution and strength of the magnetic field.

[0014] Preferably, it further comprises a control system integrated with sensors, processors and execution elements for real-time monitoring of the plasma position and automatic adjustment of the magnetic field parameters according to the preset instructions or real-time data.

[0015] In another aspect, the present application also provides a device for adjusting the center position of the plasma based on magnetic confinement,

[0016] characterized in that it comprises:

[0017] a plasma chamber for accommodating light source components and generating plasma;

[0018] at least one magnetic field generator arranged inside or around the plasma chamber for generating a magnetic field of closed magnetic field lines structure, wherein the magnetic field includes a "polar" magnetic field along the radial direction of the ring,

[0019] to form a ring-shaped solenoid-shaped magnetic field layout;

[0020] A control system is connected with the magnetic field generator, for controlling the output parameters of the magnetic field generator, so as to dynamically adjust the shape, strength and distribution of the magnetic field, guide the movement of the plasma along the preset path, and monitor the position of the plasma in real time, and adjust according to the deviation between the target position and the actual position.

[0021] Preferably, the magnetic field generator comprises a plurality of independently controlled coils or permanent magnets to realize the control of the magnetic field.

[0022] Preferably, the control system is integrated with a sensor, a processor and an execution element, the sensor is used to monitor the position of the plasma in real time, the processor is used to calculate the adjustment parameters according to the preset instructions or real-time data, and the execution element is used to control the output of the magnetic field generator according to the adjustment parameters.

[0023] Compared with the prior art, the present application has the following beneficial effects:

[0024] 1) Position adjustability: by adjusting the magnetic field parameters, the center position of the plasma can be flexibly controlled to meet the needs of different application scenarios.

[0025] 2) Stability enhancement: the closed magnetic line structure and the introduction of the "polar" magnetic field effectively solve the problem of charge separation and improve the overall stability of the plasma.

[0026] 3) Simple operation: the control system realizes automatic operation, reducing the difficulty and cost of manual intervention. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0028] The device of the present application mainly includes three parts: plasma chamber, magnetic field generator and control system. Plasma chamber: used to accommodate light sources and generate plasma. The design of the chamber needs to consider the requirements of sealing, high temperature resistance, high pressure resistance, etc. to ensure that the plasma is generated and exists in a stable environment. Magnetic field generator: set in or around the plasma chamber, with a specific geometric shape and distribution pattern. For example, coils with ring, spiral or multipole structure can be used as magnetic field generators, which are arranged symmetrically or asymmetrically around the central axis or predetermined center point of the plasma chamber. By controlling the current intensity, frequency or phase difference of the coils, a magnetic field with a specific shape and strength can be generated. Control system: including sensors, processors and execution elements. Sensors are used to monitor the position of plasma in the chamber in real time, processors calculate adjustment parameters according to preset instructions or real-time data, and execution elements control the output of the magnetic field generator according to the adjustment parameters.

[0029] The operation method of the present application is as follows:

[0030] Start the light source device: The light source device can be a laser, electron beam, etc. which can excite gas to generate plasma.

[0031] Set up the magnetic field generator: according to the experimental requirements, select the appropriate shape and distribution pattern of the magnetic field generator, and install it in or around the plasma chamber. Ensure that the magnetic field generator can generate a magnetic field with a closed magnetic force line structure, and the magnetic field can cover the entire plasma area.

[0032] Adjust the magnetic field parameters: adjust the output parameters of the magnetic field generator such as current intensity, frequency or phase difference through the control system. According to the real-time monitoring of the position information of the plasma, gradually adjust the magnetic field parameters to make the plasma move along the preset path and reach the desired position.

[0033] Stabilize the position of the plasma: after the plasma reaches the desired position, keep the magnetic field parameters stable to ensure that the plasma can remain in this position and exist stably. At the same time, through the control system, the position change of the plasma is monitored in real time, and once it is found that it deviates from the preset position, it will be adjusted immediately to restore its stable state.

[0034] Using the method and device of the present application to conduct experiments can realize the precise control and positioning of plasma. By adjusting the output parameters of the magnetic field generator, the trajectory and position of the plasma can be flexibly changed to meet different experimental requirements. In addition, this method has the advantages of simple operation, good stability, high reliability, etc., and can be widely used in the fields of plasma physics research, material processing, nuclear fusion reaction, etc.

[0035] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims. It is to be understood that the terms such as first and second, etc., merely are used to differentiate one from another without necessarily implying or requiring any actual relationship or order between them. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0036] While the embodiments of the application have been shown and described herein, it is to be understood that the application is not limited to these embodiments. Rather, many modifications, changes, substitutions, and alterations can be made thereto without departing from the spirit and scope of the present application as defined by the appended claims and their equivalents.

Claims

1. A method for adjusting the center position of a plasma based on magnetic confinement, characterized in that, Includes the following steps: S1. At least one magnetic field generator is provided in or around the plasma chamber to generate a magnetic field with a closed magnetic field structure, wherein the magnetic field generator is arranged symmetrically or asymmetrically around the central axis or a predetermined center point of the plasma chamber to generate a magnetic field with a closed magnetic field structure in the chamber. S2. The magnetic field generated by the magnetic field generator includes a "polar" magnetic field along the radial direction, which combines with the closed magnetic field lines surrounding the plasma to form a ring-shaped spiral magnetic field line layout, so as to effectively confine and guide charged particles in the plasma. S3. Activate the light source device to generate plasma in the plasma chamber; S4. By controlling the output parameters of the magnetic field generator, the shape, intensity and distribution of the magnetic field are dynamically adjusted to guide the charged particles in the plasma to make gyratory motion along a preset path, thereby changing the overall position of the plasma; S5. Monitor the position of the plasma in real time, and adjust the magnetic field parameters according to the deviation between the target position and the actual position until the plasma reaches the desired luminescence position and remains stable.

2. The method for adjusting the plasma center position based on magnetic confinement according to claim 1, characterized in that, The magnetic field generator includes multiple independently controlled magnetic coils or permanent magnets for precise control of the distribution and intensity of the magnetic field.

3. The method for adjusting the plasma center position based on magnetic confinement according to claim 1, characterized in that, It includes a control system that integrates sensors, processors, and actuators to monitor the plasma position in real time and automatically adjust the magnetic field parameters according to preset instructions or real-time data.

4. A device for adjusting the center position of a plasma based on magnetic confinement, characterized in that, include: A plasma chamber is used to house the light source assembly and generate plasma. At least one magnetic field generator is disposed within or around the plasma chamber for generating a magnetic field for a closed magnetic field structure, wherein the magnetic field includes a "polar" magnetic field along the radial direction of the toroidal line to form a toroidal spiral magnetic field layout. The control system, connected to the magnetic field generator, is used to control the output parameters of the magnetic field generator, thereby dynamically adjusting the shape, intensity and distribution of the magnetic field to guide the plasma to move along a preset path, and to monitor the position of the plasma in real time and make adjustments according to the deviation between the target position and the actual position.

5. The device for adjusting the plasma center position based on magnetic confinement according to claim 4, characterized in that, The magnetic field generator includes multiple independently controlled coils or permanent magnets to control the magnetic field.

6. The apparatus for adjusting the plasma center position based on magnetic confinement according to claim 4 or 5, characterized in that, The control system integrates sensors, a processor, and actuators. The sensors are used to monitor the plasma position in real time, the processor is used to calculate and adjust parameters according to preset instructions or real-time data, and the actuators are used to control the output of the magnetic field generator according to the adjusted parameters.