Fused quartz laser damage detection method based on first principle

Abstract

The invention discloses a fused quartz laser damage detection method based on a first principle, belongs to the technical field of optical material surface damage detection, and solves the problem that the service life of an impurity-containing fused quartz element cannot be evaluated due to the fact that the laser damage condition of the impurity-containing fused quartz element cannot be explained from the electronic level in the prior art. The method comprises the following steps of: establishing a pure fused quartz structure model and an impurity-containing fused quartz structure model based on a first principle; calculating electronic information based on the first principle, the pure fused quartz structure model and the impurity-containing fused quartz structure model; performing laser irradiation simulation on the impurity-containing fused quartz structure model, and calculating the electronic information of the impurity-containing fused quartz structure model based on the first principle after simulation; and calculating macroscopic thermophysical parameters of the impurity-containing fused quartz structure model before and after laser irradiation based on the first principle, and finally judging laser damage to impurity-containing fused quartz. The method is used for detecting the laser damage of fused quartz.

Description

technical field [0001] The invention relates to a first-principle-based detection method for laser damage of fused silica, which is used for the detection of laser damage of fused silica 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 fully confine high-temperature plasma. Among them, one of the mainstream methods is laser inertial confinement nuclear fusion, which uses high-frequency laser as the driving source to provide high-intensity energy during nuclear fusion. A key issue in the realization of laser inertial confinement fusion is how the optical components in the ignition d...

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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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