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Efficient soft x-ray sources from laser-irradiated gold foam targets with well-controlled impurities

机译：来自激光辐照的泡沫金靶的有效软X射线源具有良好控制的杂质

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摘要

As an important x-ray source, enhancement of x-ray emissions from laser-produced plasmas is significant for various applications. Due to less expanding kinetic loss, gold foam with low initial density can have an enhanced x-ray conversion efficiency compared with solid-density gold. However, low-Z impurities within gold foam targets will diminish the enhancement remarkably, and should be tightly controlled. This paper presents an experimental study of a high brightness laser plasma soft x-ray source, based on a 0.36 g cm~(-3) gold foam target with negligible impurities irradiated by nanosecond laser pulses with power density around 3 × 10~(14) W cm~(-2) at the Shenguang II laser facility. A conversion efficiency, from multi-eV to multi-keV, of 51.2% is achieved in the x-ray emissions-about 21% relative enhancement compared with a solid-density gold target, and the highest conversion efficiency for Au foam planar targets yet. Good agreement has been achieved between the semi-analytical model prediction and the experimental results.
机译：作为重要的X射线源，增强激光产生的等离子体的X射线发射对于各种应用而言意义重大。由于较低的膨胀动力学损失，与固体密度的金相比，具有低初始密度的金泡沫可以提高X射线转换效率。但是，金泡沫靶材中的低Z杂质会显着降低增强效果，因此应严格控制。本文提出了一种高亮度激光等离子体软X射线源的实验研究，该光源基于0.36 g cm〜（-3）泡沫​​金靶，其功率密度为3×10〜（14）左右的纳秒激光脉冲辐照的杂质可忽略不计）W cm〜（-2）在神光II激光设备上。在X射线发射中，从多eV到多keV的转换效率达到了51.2％，与固体密度金靶相比，相对提高了约21％，是迄今为止Au泡沫平面靶的最高转换效率。在半分析模型预测和实验结果之间已经取得了良好的一致性。

著录项

  • 来源
    《Nuclear fusion》 |2018年第1期|016038.1-016038.8|共8页
  • 作者

    Yunsong Dong; Jiamin Yang; Tianming Song; Wanli Shang; Lu Zhang; Chengwu Huang; Tuo Zhu; Wenhai Zhang; Zhichao Li; Xiayu Zhan; Huabing Du; Feng Wang; Shenye Liu; Shaoen Jiang; Yongkun Ding;

  • 作者单位

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

    Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China;

  • 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

    Au foam; enhanced soft x-ray source; impurities;

    机译：金泡沫;增强的软X射线源;杂质;

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