Time-dependent measurement of high-power laser light reflection by low-Z foam plasma  

作　　者：M.Cipriani S.Yu.Gus’kov F.Consoli R.De Angelis A.A.Rupasov P.Andreoli G.Cristofari G.Di Giorgio M.Salvadori 

机构地区：[1]ENEA,Fusion and Technologies for Nuclear Safety Department,C.R.Frascati,Frascati(Rome),Italy [2]Lebedev Physical Institute,Moscow,Russia [3]Universita di Roma La Sapienza,Roma,Italy [4]INRS-EMT,Varennes,Quebec,Canada

出　　处：《High Power Laser Science and Engineering》2021年第3期40-53,共14页高功率激光科学与工程（英文版）

基　　金：funded from the Euratom research and training programme 2014-2018 and 2019-2020 under grant agreement number 633053。

摘　　要：Porous materials have many applications for laser–matter interaction experiments related to inertial confinement fusion.Obtaining new knowledge about the properties of the laser-produced plasma of porous media is a challenging task.In this work,we report,for the first time to the best of our knowledge,the time-dependent measurement of the reflected light of a terawatt laser pulse from the laser-produced plasma of low-Z foam material of overcritical density.The experiments have been performed with the ABC laser,with targets constituted by foam of overcritical density and by solid media of the same chemical composition.We implemented in the MULTI-FM code a model for the light reflection to reproduce and interpret the experimental results.Using the simulations together with the experimental results,we indicate a criterion for estimating the homogenization time of the laser-produced plasma,whose measurement is challenging with direct diagnostic techniques and still not achieved.

关 键 词：porous materials FOAMS high-power lasers numerical simulations inertial confinement fusion 

分 类 号：TB383.4[一般工业技术—材料科学与工程] TN249[电子电信—物理电子学] O53[理学—等离子体物理]