摘要
利用超强超短激光脉冲产生的高能质子束的库仑能量损失可以重建稠密等离子体的二维密度分布,使用同时迭代重建算法(SIRT算法)研究等离子体二维密度重建的影响因素.研究等离子体密度梯度、密度量级和质子束入射能量对重建误差的影响,分析质子束成像探测等离子体密度之前获得等离子体大概方位的重要性,通过数据拟合确定了能量噪声和重建误差之间的解析关系式.
Two-dimensional density distributions of dense plasmas in laser confinement fusion are revealed with proton imaging.Simultaneous iterative reconstruction algorithm(SIRT) is used to study influence factors of two-dimensional plasma density reconstruction. Effects of plasma density gradient,magnitude of density and initial proton energies on reconstruction errors are investigated. Importance of figuring out rough area and range of simulated plasma zone before simulation is analyzed. Furthermore,an analytical expression between reconstruction errors and noises is established through data analyses.
作者
李雪梅
王玉华
LI Xuemei;WANG Yuhua(School of Mathematics, Physics & Information Science, Zhejiang Ocean University, Zhoushan 316022, China;School of Petrochemical and Energy Engineering, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China)
出处
《计算物理》
EI
CSCD
北大核心
2018年第2期187-193,共7页
Chinese Journal of Computational Physics
基金
浙江省自然科学基金(LQ16A050001)
浙江海洋大学科研启动经费(23025010113)资助项目