Mechanism and method for plasma impurity injection of fusion device

Abstract

The invention discloses a mechanism and method for plasma impurity injection of a fusion device. The mechanism comprises a first connecting piece, a second connecting piece, a third connecting piece,a collector, a first guide port, a second guide port, a first guide pipe, a second guide pipe, a linear importer with scales, an air exhaust pipeline, an air exhaust valve, an air exhaust unit and a gate valve. The components are cooperatively assembled, and impurity particles are accurately and efficiently injected into plasma. Falling impurity particles (powder) can be collected when impuritiesare injected into a distribution system for testing, repeated utilization is achieved, and waste is reduced; the sealing performance of the gate valve can be protected, and the service life of the gate valve is effectively prolonged; and the accuracy of the injection amount of the impurity particles (especially powder) injected into the system can be improved. The transition mechanism for impurityparticle (powder) injection is easy to operate, capable of saving energy, efficient and high in precision, and a good technical basis is provided for successful application of impurity injection in afusion reactor in the future.

Description

technical field [0001] The invention relates to the field of fusion reactor vacuum technology, in particular to a mechanism and method for injecting plasma impurities into a fusion device. Background technique [0002] Magnetic confinement controlled nuclear fusion is one of the important ways to solve human energy and environmental problems. With the deepening of fusion experiments, the use of low-Z impurity implantation to control the radiation in the plasma divertor region, suppress the boundary localized modes (ELMs) under high confinement conditions, and improve the plasma boundary recirculation have become more and more popular among researchers. Pay attention to. In order to study the effect of impurity implantation on plasma performance, it is particularly urgent to establish a reliable and stable plasma impurity implantation system (especially metal particle impurities). Traditionally, when injecting particulate impurities, the gate valve is directly used to conne...

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Problems solved by technology

On the one hand, it will affect the vacuum sealing performance of the plug-in valve and reduce its service life, especially with corrosive impurity particles (such as lithium powder, lithium balls, etc.); on the other hand, it will affect the accuracy of the injection amount of impurity particles (powder). Degree, especially for impurity particles with poor fluidity (such as boron powder)

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