Stable high-restraint high-frequency small-amplitude boundary local die operation method suitable for fusion reactor

Abstract

The invention discloses a stable high-restraint high-frequency small-amplitude boundary local die operation method suitable for a fusion reactor. On the condition of optimized high inner resistance, high boundary safety factor, high polarized specific voltage and high triangulation, high plasma energy storage and high plasma core restraint are obtained, and small-amplitude high-frequency boundary local die is obtained. The high core restraint facilitates sustaining of high parameter of the plasma core part and facilitates realization of a fusion reaction. A high-frequency small-amplitude boundary local die facilitates settlement of a first wall transient heat load problem, and furthermore has relatively high particle eliminating capability, thereby preventing a plasma impurity core polymerization problem. The operation parameter interval which is required by the method is compatible with the operation interval of a future fusion reactor. Furthermore stable state operation of the plasma can be realized. The stable high-restraint high-frequency small-amplitude boundary local die operation method has low breakage risk, excellent robustness and high repeatability. The stable high-restraint high-frequency small-amplitude boundary local die operation method has a relatively ideal operation mode which may be used for the reactor grade.

Description

technical field [0001] The invention relates to the field of operating methods of magnetic confinement fusion devices, in particular to a steady-state high-constraint high-frequency small-amplitude boundary local mode operation method suitable for fusion reactors. Background technique [0002] The high-constraint operation mode (H-mode) is the main basic operation mode of tokamak devices today. Under the H-mode constraint, a platform base region with a steep distribution of density and temperature is formed at the boundary of the tokamak, that is, the boundary transport barrier. Generally speaking, after entering the H-mode, the boundary transport barrier is formed and continues to rise, and the boundary pressure gradient and bootstrap current also increase continuously. When a certain threshold is reached, the boundary transport barrier collapses and the boundary localized mode erupts. Boundary localized modes erupt periodically with the collapse and establishment of bound...

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Problems solved by technology

However, these operating modes can only partially solve the above-mentioned problem of maintaining high-constraint and high-parameter steady-state operation while avoiding large-scale boundary local mode explosions.

For example, although the amplitude of the boundary localized mode of the third type of boundary localized mode is small, its plasma confinement is relatively poor

Although the H-mode of the boundaryless localized mode generally has a good plasma confinement ability, it either has poor impurity exclusion ability, is prone to the problem of impurity core accumulation, and affects the steady-state operation of the plasma, or is not easy to realize under high parameter conditions.

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