A first mirror suitable for tokamak type magnetic confinement nuclear fusion device

Abstract

The invention relates to a first mirror structure suitable for a tokamak-type magnetic confinement nuclear fusion device and its realization method, specifically to achieve high-energy plasma, neutron and high-energy ray irradiation resistance, and high spectral reflectance and its stable mirror. This first mirror has a protective layer, a functional film layer, a solder transition layer, and a microchannel cooler. The functional thin film layer is plated on the protective layer by vacuum coating process, and the functional thin film layer and the microchannel cooler are connected by vacuum brazing process through solder transition layer welding to form an integrated multi-layer composite structure. Its protective layer is resistant to high-energy plasma, neutron and high-energy ray radiation. The functional film layer has a characteristic spectral reflection function. The microchannel cooler discharges the heat deposited on the protective layer. This first mirror is suitable for high-energy plasma, medium It is suitable for use as the first mirror of a nuclear fusion reaction device under the conditions of electron and high-energy ray irradiation.

Description

technical field [0001] The invention relates to a method for realizing the first mirror suitable for a tokamak type magnetic confinement nuclear fusion device. Specifically, a multi-layer structure is adopted to realize a mirror with an optical diagnosis function, and it is used in high-energy plasma, The realization method of the reflector with stable spectral reflectance under neutron and high-energy ray irradiation conditions. Background technique [0002] In the tokamak type magnetic confinement fusion experimental device, the first mirror (FM) facing the plasma must be installed in the vacuum chamber of the device due to the need for optical diagnostic systems (such as Thomson scattering and far infrared, etc.). With the steady-state operation of fusion devices (such as ITER), the plasma discharge time is prolonged and the operating parameters are increased. The time of the first mirror being exposed to the plasma is longer and the effect is stronger. The problem of the...

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Problems solved by technology

[0003] At present, the research mostly uses metal materials with high melting point and high hardness, such as single crystal resistant metal molybdenum, rhodium and tungsten, to prepare tungsten and molybdenum mirrors with high reflectivity, and technical problems such as processing high melting point and high hardness metals need to be overcome, but large Large-scale metal single crystal tungsten and molybdenum to prepare the first mirror The processing and polishing of the mirror surface are difficult and expensive, and the current technical ability cannot guarantee the repeated processing of high-quality metal single crystal first mirror

It has also been proposed that coating a metal film on a high thermal conductivity substrate can overcome technical problems such as difficult processing and polishing compared to the preparation of the first single crystal mirror, but the preparation of a certain thickness of the metal film will have low adhesion and sputtering resistance. Inferior defects

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