Multibeam laser±plasma interaction at the Gekko Ⅻ laser facility in conditions relevant for direct-drive inertial confinement fusion
作者机构：Intense Laser Irradiation Laboratory Dipartimento SBAI Università di Roma ‘La Sapienza' Université BordeauxCNRS CEA CELIA Institute of Laser Engineering Osaka University Centre de Physique Théorique CPHT CNRS IP ParisEcole Polytechnique Graduate School of Engineering Osaka University Institute of Plasma Physics and Lasers Hellenic Mediterranean University Research Centre Institute for Integrated Radiation and Nuclear Science Kyoto University
出 版 物：《High Power Laser Science and Engineering》 (高功率激光科学与工程)
年 卷 期：2023年第2期
页 面：75-85页
核心收录：
学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术]
基 金：funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No. 101052200-EUROfusion) support and under the auspices of the NIFS Collaboration Research program (2021NIFS18KUGK123)
摘 要：Laser±plasma interaction and hot electrons have been characterized in detail in laser irradiation conditions relevant for direct-drive inertial confinement fusion. The experiment was carried out at the Gekko XII laser facility in multibeam planar target geometry at an intensity of approximately 3 × 1015W/cm2. Experimental data suggest that high-energy electrons, with temperatures of 20-50 ke V and conversion efficiencies of η 1%, were mainly produced by the damping of electron plasma waves driven by two-plasmon decay（TPD）. Stimulated Raman scattering（SRS） is observed in a near-threshold growth regime, producing a reflectivity of approximately 0.01%, and is well described by an analytical model accounting for the convective growth in independent speckles. The experiment reveals that both TPD and SRS are collectively driven by multiple beams, resulting in a more vigorous growth than that driven by single-beam laser intensity.
同方期刊数据库