Two-Plasmon-Decay Instability Stimulated by a Normal- and Large-Angle-Incidence Laser Pair

作     者：Lian, C.-W. Ji, Y. Yan, R. Li, J. Cao, S.-H. Ren, C. Wang, L.-F. Ding, Y.-K. Zheng, J. 

作者机构：Department of Modern Mechanics University of Science and Technology of China Anhui Hefei230026 China Department of Plasma Physics and Fusion Engineering University of Science and Technology of China Hefei230026 China Collaborative Innovation Center of IFSA Shanghai Jiao Tong University Shanghai200240 China Department of Mechanical Engineering University of Rochester RochesterNY14627 United States Institute of Applied Physics and Computational Mathematics Beijing100088 China 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2024年

核心收录：

主　　题：Laser beams 

摘      要：The two-plasmon-decay instability (TPD) is a critical target preheating risk in direct-drive inertial confinement fusion. In this paper, TPD collectively driven by a normal-incidence laser beam (Beam-N) and a large-angle-incidence laser beam (Beam-L) is investigated via particle-in-cell simulations. Significant TPD growth is found able to develop in this regime at previously unexpected low laser intensities if the intensity of Beam-L exceeds the large-angle-incidence threshold. Both beams contribute to the growth of TPD in a seed-amplification manner where the absolute instability driven by Beam-L provides the seeds that get convectively amplified by Beam-N, making TPD energetically important and causing significant pump depletion and hot electron generation. Copyright © 2024, The Authors. All rights reserved.