摘要
基于准一维平板内爆模型,利用混合流体-PIC程序ASCENT-H与一维流体力学程序MULTI-IFE,对比研究两团等离子体的对撞过程。混合流体-PIC模拟表明存在显著离子对穿现象,且离子速度分布偏离热平衡状态;延长了动能转化时间,影响对撞过程中的能量转化和温度分布。相应地,离子温度峰值较流体模拟低、空间分布出现更大展宽。此外,还探讨壳层速度不对称性对等离子体对撞后温度密度状态的影响。本工作深化了对ICF内爆过程和点火热斑形成过程的理解。
This paper utilizes quasi-one-dimensional planar implosion model to investigate plasma collision,comparing hybrid fluid-PIC program ASCENT-H against one-dimensional hydrodynamic program MULTI-IFE.Our simulations reveal that ion interpenetration,evident in ASCENT-H,leads to a significant deviation from thermal equilibrium in ion velocity distribution and prolongs kinetic energy conversion time.This deviation markedly influences energy conversion and temperature distribution,resulting in a lower peak ion temperature and an expanded spatial distribution compared to fluid simulation predictions.Additionally,this study explores impact of asymmetric shell velocities on core temperature and its spatial distribution.Collectively,these findings enhance our comprehension of inertial confinement fusion(ICF)implosion process and mechanisms underlying hot spot formation.
作者
王艺澎
康洞国
刘庆康
张旭
林伟胜
孟凡琦
罗慧
蔡洪波
WANG Yipeng;KANG Dongguo;LIU Qingkang;ZHANG Xu;LIN Weisheng;MENG Fanqi;LUO Hui;CAI Hongbo(Institute of Applied Physics and Computational Mathematics,Beijing 100094,China;Graduate School,China Academy of Engineering Physics,Beijing 100088,China;Center for Applied Physics and Technology,College of Engineering,Peking University,Beijing 100871,China)
出处
《计算物理》
北大核心
2025年第4期407-415,共9页
Chinese Journal of Computational Physics
基金
国家重点研发计划(2022YFA1603204)
国家自然科学基金(12325510)
科学挑战专题(TZ2024016)资助。
关键词
内爆减速阶段
对穿效应
混合流体-PIC建模
implosion deceleration phase
interpenetration effect
hybrid fluid-PIC model
