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Efficient X-ray emission from laser-irradiated low-density lead target: a substitute for gold in hohlraum design

机译:激光辐照的低密度铅靶的有效X射线发射:全息设计中的金替代品

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摘要

Numerical experiments are carried out to calculate continuum emissivity and opacity of plasmas produced from laser-irradiated Au and Pb targets as hohlraum wall materials. Targets are considered to be solid or porous with different initial densities. Simulation results show a good agreement compared with the measured data. The results show that under identical conditions, X-ray emission is higher for Au plasma; however, by decreasing initial densities, X-ray yield enhancement is greater for Pb plasma. By using a Pb target with initial density of about 1.14 g cm(-3) instead of solid Au target, the same X-ray yield even more can be obtained. Calculations also show that in the conditions of solid density targets, Pb plasma offers a little lower opacity in soft X-ray region. Decreasing initial density of Pb causes its opacity to increase and get closer to the opacity of solid Au which in turn reduces energy losses in hohlraum wall.
机译:进行了数值实验,以计算由激光辐照过的Au和Pb靶作为hl壁材料产生的等离子体的连续发射率和不透明度。靶标被认为是具有不同初始密度的固体或多孔材料。仿真结果与实测数据相吻合。结果表明,在相同条件下,Au等离子体的X射线发射较高;但是,通过降低初始密度,Pb等离子体的X射线产量提高幅度更大。通过使用初始密度约为1.14 g cm(-3)的Pb靶代替固态Au靶,可以获得相同的X射线产量。计算还表明,在固体密度目标条件下,Pb等离子体在软X射线区域的不透明性较低。 Pb的初始密度降低会导致其不透明性增加并更接近于固体Au的不透明性,从而减少了白矾壁中的能量损失。

著录项

  • 来源
    《Applied physics》 |2015年第1期|95-105|共11页
  • 作者

    Fazeli R.;

  • 作者单位

    Islamic Azad Univ, Lahijan Branch, Fac Sci, Lahijan, Iran.;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-18 03:08:04

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