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A comparison of Raman and pyrometry dynamic temperature measurements of shocked cyclohexane

机译:震动环己烷的拉曼和热测定动态温度测量的比较

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摘要

Optical pyrometry is a well-developed, broadly applicable method to determine temperature in dynamic compression experiments. However, it measures radiation from only the skin depth of the radiant material, is highly susceptible to spurious backgrounds, and requires an often-unmeasurable free parameter-the sample dynamic emissivity. Raman spectroscopy offers a method to determine temperature directly from fundamental theory, but it is practically limited in applications to a small subset of shock experiments. In this work, we describe an experiment allowing simultaneous application of Raman and pyrometric temperature techniques to benchmark a specific instance of pyrometry. We attempted both measurements on multiple experiments and compare the successful temperature results between the separate but highly repeatable shots. We find that dynamic shock temperatures inferred from Raman spectroscopy and pyrometry generally agree within the uncertainties of each measurement, although those uncertainties are larger than typical for a specially designed pyrometry experiment on a shocked metal sample.
机译:光学热测定是一种明显的广义适用的方法,用于确定动态压缩实验中的温度。然而,它测量辐射从辐射材料的皮肤深度,高易受杂散背景的影响,并且需要经常可衡量的可自由参数 - 样本动态发射率。拉曼光谱技术提供了一种直接从基本理论确定温度的方法,但它实际上限于应用于小型冲击实验的小型子集中。在这项工作中,我们描述了一种实验,允许同时施加拉曼和高温技术来基准波动测量的特定实例。我们试图对多个实验进行测量,并比较单独但高度可重复拍摄之间的成功温度结果。我们发现从拉曼光谱和高温测定推断的动态休克温度通常在每种测量的不确定性内同意,尽管这些不确定性大于诸如震动金属样品上的专门设计的热测定实验的典型。

著录项

  • 来源
    《Journal of Applied Physics》 |2021年第7期|075901.1-075901.12|共12页
  • 作者单位

    Los Alamos National Laboratory Los Alamos New Mexico 87545 USA;

    Los Alamos National Laboratory Los Alamos New Mexico 87545 USA;

    Los Alamos National Laboratory Los Alamos New Mexico 87545 USA;

    Nevada National Security Site Transformational Diagnostics and Imaging Los Alamos New Mexico 87544 USA;

  • 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
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