Detection method of fused silica laser damage based on first principles

Abstract

The invention discloses a first-principle-based detection method for fused silica laser damage, which belongs to the technical field of optical material surface damage detection, and solves the problem that the prior art cannot explain the laser damage of fused silica components containing impurities from the electronic level, and thus cannot Issues evaluating the service life of impurity-laden fused silica components. The invention establishes the pure fused silica structure model and the impurity-containing fused silica structure model based on the first principle; calculates its electronic information based on the first principle, the pure fused silica structure model and the impurity-containing fused silica structure model; The structure model is simulated by laser irradiation, and after the simulation, the electronic information of the impurity-containing fused silica structure model is calculated based on the first principle; the macroscopic thermophysical parameters of the impurity-containing fused silica structure model before and after laser irradiation are calculated based on the first principle, and finally The laser damage judgment of impurity-containing fused silica is carried out. The invention is used for detection of fused silica laser damage.

Description

technical field [0001] A detection method for fused silica laser damage based on first principles is used for detection of fused silica laser damage, and belongs to the technical field of optical material surface damage detection. Background technique [0002] Inertial Confinement Fusion (ICF) is considered to be one of the most effective ways to solve human energy problems in the future. However, in order to realize this inertial confinement thermonuclear fusion reaction, two basic conditions must be met. The first is extremely high temperature, and the second is the ability to artificially confine high-temperature plasma sufficiently. Among them, one of the mainstream methods is laser inertial confinement nuclear fusion, which uses a high-frequency laser as a driving source to provide high-intensity energy during nuclear fusion. A key issue in the realization of laser inertial confinement nuclear fusion is how the optical elements (usually fused silica mirrors and KDP cry...

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Problems solved by technology

[0009] In view of the problems of the above research, the object of the present invention is to provide a first-principle-based detection method for laser damage of fused silica, to solve the problem that the prior art fails to obtain electronic information of fused silica near metal defects on the surface of fused silica, As well as the local macroscopic thermodynamic parameters of fused silica based on first-principle calculations, at the same time, it is impossible to use molecular dynamics methods to simulate the interaction process between lasers and materials at the electronic level to detect damage to fused silica containing impurities, that is, it is impossible to detect damage from electronic Explain the laser damage of fused silica components containing impurities, so that the service life of fused silica components containing impurities cannot be evaluated

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