SUNIST-2 is the spherical tokamak with the strongest magnetic field and the highest plasma performance in my country (pictured below). The design parameters are a large radius of 0.53 meters, a small radius of 0.33 meters, a magnetic field of 1.0 Tesla, and a plasma current of 0.5 megaamperes. SUNIST-2 is equipped with a pair of movable internal poloidal field coils, multiple sets of fixed external poloidal field coils and a segmented center solenoid, as well as a single output current of up to 110 kiloamps and a total power of nearly 100 megawatts. The modular energy storage magnet power supply has rich plasma configuration configurations and powerful plasma control capabilities.
The SUNIST-2 spherical tokamak is an important experimental device for advanced toroidal, compact magnetic confinement fusion exploration research. Its main goal is to explore the starting and heating methods of centerless solenoids such as magnetic reconnection for tokamak under a strong toroidal magnetic field (1T). The device has a large radius of 0.525m, a small radius of 0.325m, a central field strength of 1T, a maximum plasma current of 0.5MA, and a plasma density of 2×10^19/m³. The main machine height is 5.25m and the maximum outer diameter is 4.6m.
The main unit of SUNIST-2 is composed of vacuum chamber, magnet system, position adjustment system, maintenance movement system, busbar and support connection system, drive system, etc. Among them, the magnet system is particularly complex, consisting of 8 longitudinal field magnet coils, 10 poloidal field coils, 2 divertor coils, 2 fusion coils and a set of 6 central solenoid coils, for a total of 28 coils. This allows SUNIST-2 to have multiple operating modes such as ohmic discharge and fused compression discharge, and can realize various plasma configurations such as limiter, divertor, negative triangle transformation, double ring, etc. It is a very flexible and innovative controlled fusion and magnetic field. Reconnection physics research platform.
The SUNIST-2 spherical tokamak is an experimental device used to study magnetically confined nuclear fusion reactions. In this device, high-temperature, high-density plasma is confined in an annular space by a strong magnetic field to achieve the conditions for fusion reactions. As a special metal material, 90WMoNiFe alloy may have the following applications in the SUNIST-2 spherical tokamak:
Plasma-oriented materials (PFM)
In a tokamak device, plasma-facing materials are in direct contact with high-temperature, high-energy plasma and are subjected to extremely high thermal loads, particle bombardment, and chemical erosion. 90WMoNiFe alloy may be used as part of the plasma-facing materials to build the first wall and divertor structure inside the tokamak. This alloy may have excellent high temperature resistance, corrosion resistance and mechanical properties to meet the requirements of the tokamak’s extreme operating environment.
Structural materials
In addition to the components directly facing the plasma, tokamak devices also require large amounts of structural materials to support and secure various internal components. 90WMoNiFe alloys may be used as components of these structural materials due to their high strength, good thermal stability, and radiation resistance.
coil material
The magnetic field coils in a tokamak are key components in generating and maintaining the strong magnetic fields that confine the plasma. 90WMoNiFe alloy may have been considered for these coils due to its high electrical conductivity and good thermal stability to ensure stability and reliability of the magnetic field.
Diagnostic system components
In tokamak experiments, various diagnostic systems are needed to monitor and analyze the status and behavior of the plasma. 90WMoNiFe alloy may be used to manufacture certain components of these diagnostic systems, such as windows, detector brackets, etc., to meet the requirements for stable operation in high temperature and strong magnetic field environments.
It should be noted that the specific application situation may depend on the specific composition of the 90WMoNiFe alloy, the preparation process, and the specific design and operating parameters of the SUNIST-2 spherical tokamak. Therefore, detailed evaluation and testing of the properties of this alloy may be required in practical applications.
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