First lens for Tokamak type magnetically-confined nuclear fusion device

Abstract

The invention relates to a first lens structure for a Tokamak type magnetically-confined nuclear fusion device and a realization method thereof. Particularly, the first lens is a reflector that has anti-high-energy plasma and neutron and anti-high-energy ray irradiation and has a high spectral reflectivity and high stability. The first lens is provided with a protective layer, a functional thin-film layer, a welding brazing filter material transition layer, and a micro channel cooler. The functional thin-film layer is plated on the protective layer by using a vacuum film-plating process; and the functional thin-film layer and the micro channel cooler are processed by using a vacuum brazing process and are welded together by the welding brazing filter material transition layer to form an integrated multi-layer composite structure. The protective layer is resistant to the high-energy plasma, the high-energy neutron, and the high-energy ray irradiation. The functional thin-film layer has the feature spectrum reflection function; and the micro channel cooler dissipates the heat deposited by the protective layer. The first lens can be applied to the high-energy plasma, high-energy neutron, and high-energy ray irradiation conditions and can be applied to a nuclear fusion reaction device.

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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