Laser interactions with gas jets:electromagnetic pulse emission and nozzle damage  

作　　者：P.W.Bradford V.Ospina-Bohórquez M.Ehret J.-L.Henares P.Puyuelo-Valdes T.Chodukowski T.Pisarczyk Z.Rusiniak C.Salgado-López C.Vlachos M.Scisciò M.Salvadori C.Verona G.S.Hicks O.C.Ettlinger Z.Najmudin J.-R.Marquès L.Gremillet J.J.Santos F.Consoli V.T.Tikhonchuk 

机构地区：[1]Centre Lasers Intenses et Applications,University of Bordeaux-CNRS-CEA,Talence,Bordeaux,France [2]CEA,DAM,DIF,Arpajon,France [3]Universite Paris-Saclay,CEA,LMCE,Bruyeres-le-Chatel,France [4]Centro de Laseres Pulsados,Villamayor,Salamanca,Spain [5]Institute of Plasma Physics and Laser Microfusion,Warsaw,Poland [6]ENEA-Nuclear Department,C.R.Frascati,Frascati,Italy [7]Dipartimento Ing.Industriale,Universita di Roma“Tor Vergata”,Roma,Italy [8]The John Adams Institute for Accelerator Science,Blackett Laboratory,Imperial College London,London,UK [9]LULI,CNRS,Ecole Polytechnique,CEA,Sorbonne Universite,Institut Polytechnique de Paris,Palaiseau Cedex,France [10]Extreme Light Infrastructure ERIC,ELI Beamlines Facility,Dolni Bˇrežany,Czech Republic [11]Current affiliation:Central Laser Facility,Rutherford Appleton Laboratory,Didcot,UK [12]Current affiliation:Consiglio Nazionale delle Ricerche,Istituto Nazionale di Ottica,CNR-INO,Pisa,Italy

出　　处：《High Power Laser Science and Engineering》2024年第6期260-276,共17页高功率激光科学与工程(英文版)

基　　金：funded by the European Union via the Euratom Research and Training Programme(Grant Agreement No.101052200–EUROfusion);funded by MCIN/AEI/10.13039/501100011033/FEDER;funded by the European Union;support from the LIGHT S&T Graduate Program(PIA3Investment for the Future Program,ANR-17-EURE-0027);funding from the European Union’s Horizon 2020 research and innovation programme through the European IMPULSE project under grant agreement No.871161 and from LASERLAB-EUROPE V under grant agreement No.871124;co-financed by the Polish Ministry of Science and Higher Education within the framework of the scientific financial resources for 2021–2022 under contract No.5205/CELIA/2021/0(project CNRS No.239915);the financial support of the Id Ex University of Bordeaux/Grand Research Program‘GPR LIGHT’

摘　　要：Understanding the physics of electromagnetic pulse(EMP) emission and nozzle damage is critical for the long-term operation of laser experiments with gas targets, particularly at facilities looking to produce stable sources of radiation at high repetition rates. We present a theoretical model of plasma formation and electrostatic charging when high-power lasers are focused inside gases. The model can be used to estimate the amplitude of gigahertz EMPs produced by the laser and the extent of damage to the gas jet nozzle. Looking at a range of laser and target properties relevant to existing high-power laser systems, we find that EMP fields of tens to hundreds of kV/m can be generated several metres from the gas jet. Model predictions are compared with measurements of EMPs, plasma formation and nozzle damage from two experiments on the VEGA-3 laser and one experiment on the Vulcan Petawatt laser.

关 键 词：electromagnetic pulse gas jet high-power laser laser plasma 

分 类 号：TN24[电子电信—物理电子学] O53[理学—等离子体物理]