等离子体二维密度重建的影响因素

doi:10.19596/j.cnki.1001-246x.7611

计算物理 ›› 2018, Vol. 35 ›› Issue (2): 187-193.DOI: 10.19596/j.cnki.1001-246x.7611

等离子体二维密度重建的影响因素

李雪梅¹, 王玉华²

1. 浙江海洋大学数理与信息学院, 浙江舟山 316022;
2. 浙江海洋大学石化与能源工程学院, 浙江舟山 316022

收稿日期:2016-12-21 修回日期:2017-08-16 出版日期:2018-03-25 发布日期:2018-03-25
作者简介:李雪梅(1982-),女,山东汶上,副教授,主要从事激光等离子体相互作用研究,E-mail:lixuemei386@163.com
基金资助:
浙江省自然科学基金（LQ16A050001）及浙江海洋大学科研启动经费（23025010113）资助项目

Influence Factors in Two-Dimensional Plasma Density Reconstruction

LI Xuemei¹, WANG Yuhua²

1. School of Mathematics, Physics & Information Science, Zhejiang Ocean University, Zhoushan 316022, China;
2. School of Petrochemical and Energy Engineering, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China

Received:2016-12-21 Revised:2017-08-16 Online:2018-03-25 Published:2018-03-25

摘要/Abstract

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.

关键词: 密度分布, SIRT算法, 质子束成像, 氘氚等离子体

Abstract: 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.

Key words: density distribution, SIRT method, proton imaging, DT plasma

中图分类号:

O536

李雪梅, 王玉华. 等离子体二维密度重建的影响因素[J]. 计算物理, 2018, 35(2): 187-193.

LI Xuemei, WANG Yuhua. Influence Factors in Two-Dimensional Plasma Density Reconstruction[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2018, 35(2): 187-193.

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等离子体二维密度重建的影响因素

Influence Factors in Two-Dimensional Plasma Density Reconstruction

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