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Spectroscopic imaging of metal halide high-intensity discharge lamps.

机译：金属卤化物高强度放电灯的光谱成像。

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摘要

The body of this work consists of three main research projects. An optical- and near-ultraviolet-wavelength absorption study sought to determine absolute densities of ground and excited level Sc atoms, ground level Sc + ions, and ground level Na atoms in a commercial 250 W metal halide high intensity discharge lamp during operation. These measurements also allowed the determination of the arc temperature and absolute electron density as functions of radius.; Through infrared emission spectroscopy, relative densities of sodium and scandium were determined as functions of radius. Using the absolute densities gained from the optical experiment, these relative densities were calibrated. In addition, direct observation of the infrared emission allowed us to characterize the infrared power losses of the lamp. When considered as a fraction of the overall power consumption, the near-infrared spectral power losses were not substantial enough to warrant thorough investigation of their reduction in these lamps.; The third project was an attempt to develop a portable x-ray diagnostic experiment. Two-dimensional spatial maps of the lamps were analyzed to determine absolute elemental mercury densities and the arc temperature as a function of radius. Two methods were used to improve the calibration of the density measurements and to correct for the spread in x-ray energy: known solutions of mercury in nitric acid, and an arc lamp which was uniformly heated to evaporate the mercury content. Although many complexities arose in this experiment, its goal was successfully completed.
机译：这项工作的主体包括三个主要的研究项目。一项光学和近紫外波长吸收研究试图确定在运行过程中商用250 W金属卤化物高强度放电灯中的基态和激发态Sc原子，基态Sc +离子和基态Na原子的绝对密度。这些测量还可以确定电弧温度和绝对电子密度与半径的函数关系。通过红外发射光谱，确定钠和scan的相对密度作为半径的函数。使用从光学实验中获得的绝对密度，可以校准这些相对密度。另外，直接观察红外发射使我们能够表征灯的红外功率损耗。当被认为是总功耗的一小部分时，近红外光谱的功率损耗还不足以保证对其这些灯的减少进行彻底的研究。第三个项目是尝试开发便携式X射线诊断实验的尝试。分析了灯的二维空间图，以确定元素汞的绝对密度和电弧温度与半径的关系。有两种方法可用来改善密度测量的校准并校正X射线能量的散布：已知的硝酸汞溶液，以及均匀加热以蒸发汞含量的弧光灯。尽管此实验产生了许多复杂性，但其目标已成功完成。

著录项

  • 作者

    Bonvallet, Geoffrey A.;

  • 作者单位

    The University of Wisconsin - Madison.;

  • 授予单位 The University of Wisconsin - Madison.;
  • 学科 Physics Atomic.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 97 p.
  • 总页数 97
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 分子物理学、原子物理学;
  • 关键词

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