摘要
讨论了神光-Ⅲ主机内爆柱腔靶长径比(腔长与直径之比)对靶丸辐照不均匀度的影响。根据神光-Ⅲ主机设计参数,计算了黑腔内侧激光光斑参数。利用视角因子方法,分析了一个简化的双锥环辐照模型下靶丸表面辐照不均匀度随黑腔长径比的变化,讨论了腔壁反照率、内外环激光功率比和光斑移动等因素对最佳长径比和不均匀度的影响。计算表明,合理选择长径比能使靶丸表面辐照不均匀度小于1%,最佳长径比与NIF点火黑腔设计值基本相符。
The paper discusses the effects of length-to-diameter ratio of cylindrical hohlraum on irradiation nonuniformity of capsule on Shenguang-Ⅲ facility.The parameters of laser spots on hohlraum＇s inner wall are calculated according to the parameters of Shenguang-Ⅲ facility.The variation of irradiation nonuniformity with the length-to-diameter ratio is analyzed with view factor method for a simplified dual-core irradiation model,and the variations of the best length-to-diameter ratio and irradiation nonuniformity with the albedo of hohlraum＇s inner wall,power ratio between inner and outer cones and motion of laser spots are also discussed.The calculation results show that the root-mean-square nonuniformity of irradiation is less than 1% at the best length-to-diameter ratio,which agrees with the ratio of the hohlraum designed for ignition on the National Ignition Facility.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2011年第9期2409-2414,共6页
High Power Laser and Particle Beams
基金
高温高密度等离子体物理国防科技重点实验室基金项目(9140C6801021002)
关键词
间接驱动
辐射驱动对称性
视角因子
长径比
indirect drive
drive symmetry
view factor
length-to-diameter ratio
