发表机构
University of Toronto（多伦多大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究开发了模拟激光共振饱和产生钠等离子体三维特性的计算机代码，首次测量其电子密度和温度分布，并验证了代码预测与实验的合理性，表明中等能量激光可产生低温等离子体。
AI 中文摘要
我们开发了一个计算机代码，用于模拟由激光共振饱和产生的钠等离子体的三维特性。这是通过考虑激光脉冲在非均匀钠原子分布中传播时所遭受的时间和空间畸变来实现的。我们还首次测量了这种等离子体中径向和轴向的电子密度及温度分布，并能够证明我们的计算机代码预测与这些结果合理一致。研究发现，即使钠原子密度仅为每立方厘米10的16次方、传播距离只有几厘米，激光脉冲的吸收也相当显著，因此，对于中等能量的激光脉冲，可以产生相当低温度的等离子体。
英文摘要
We have developed a computer code that models the three dimensional nature of a sodium plasma created by laser resonance saturation. This was accomplished by taking account of the temporal and spatial distortion suffered by the laser pulse as it propagates through a nonuniform sodium atom distribution. We have also undertaken the first measurements of the radial and axial electron density and temperature profiles arising in such a plasma and have been able to demonstrate that our computer code predictions are in reasonable agreement with these results. Absorption of the laser pulse is found to be quite significant for even a few centimeters of $10^{16}$~cm$^{-3}$ sodium atom density and that as a result quite low temperature plasmas can be produced for modest energy laser pulses.
