解线代数方程组的游动点估计量零方差Monte Carlo迭代格式

解线代数方程组的游动点估计量零方差ＭｏｎｔｅＣａｒｌｏ迭代格式冯庭桂（北京应用物理与计算数学研究所）ＡＺＥＲＯＶＡＲＩＡＮＣＥＩＴＥＲＡＴＩＯＮＳＣＨＥＭＥＯＦＣＯＬＬＩＳＩＯＮＥＳＴＩＭＡＴＯＲＦＯＲＳＯＬＶＩＮＧＬＩＮＥＡＲＡＬＧＥＢＲＡＩＣＥＱ...     

Semi-random simulation method for calculating 3-D radiation transfer problems in cavity

One of the most important issues in inertial confinement fusion (ICF) is to study the uniformity of the radiation field around the implosion pellet containing fuel.To this end,a numerical method linking Monte Carlo with iteration method is presented for calculating the radiation transfer problems in a cavity.The detail of the calculation scheme is described and some numerical examples are also given.     

Diagnostics of electron temperature and ions distribution in expanding Al plasmas pumped by a ns-pulsed 1.06μm laser

1. IntroductionX-r8y spectroscopy can provide much informationabout the plasma parameters, and it is often usedas a diagnostic tool for hot plasmas [1]. Resonancelines, such as Ly a and He cr, are often used for theanalysis of soft xrny spectra from highly--chargedplasmas [2,3,4,5,6], and their adjacent dielectronicsatellite lines are used to investigate the line opac-ity and intensity distribution of these resonance Iines[7,8,9,l01. In fact, dense plasmas produced by a ns-pulsed laser are op…     

激光平面靶耦合中的非平衡辐射研究

研究了激光辐照平面Au靶所产生的等离子体状态及X光的谱特性。结果表明,激光辐照Au靶所产生的X光具有明显的非平衡特征;原子模型对X光的细致谱结构有明显影响。三温模型(假设辐射是平衡谱)给出的等离子体状态、激光吸收效率及激光-X光转换效率与非平衡多群辐射输运模型的计算结果基本一致,这表明三温模型在研究等离子体状态及能量分配等方面是适用的。     

解二维非平衡辐射输运方程的两种分裂网格数值方法

讨论非矩形网格辐射输运方程的数值解法。对任意四边形网格,给出两种分裂网格数值方法:特征线积分和子网格平衡方法。并给出矩形网格和任意四边形网格两种方法的数值计算例子,且与Sn菱形格式计算结果进行比较,对方法作出评价。