用193nm聚焦激光辐射测量空气击穿和微波缩放

M. Thiyagarajan, J. Scharer, C. Denning, Siqi Luo
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引用次数: 0

摘要

我们报告了空气击穿过程的测量和分析,通过将193 nm, 200 mJ, 10 MW的高功率紫外激光辐射聚焦到10 - 20 μ m光斑尺寸,产生的激光功率密度高达1012 -1013 W/cm2,远高于空气电离的阈值功率通量。测量了击穿阈值,并与经典模型和量子理论模型进行了比较。对这些结果的普遍尺度分析允许人们根据测量的激光击穿观察来预测高功率微波击穿的某些方面。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Measurements of Air Breakdown and Scaling to Microwaves Using 193 nm Focused Laser Radiation
We report the measurements and analysis of air breakdown processes by focusing 193 nm, 200 mJ, 10 MW high power UV laser radiation on to a 10 - 20 mum spot size that produces laser power densities up to 1012 -1013 W/cm2 , well above the threshold power flux for air ionization. The breakdown threshold is measured and compared with classical and quantum theoretical models. A universal scaling analysis of these results allows one to predict some aspects of high power microwave breakdown based on measured laser breakdown observations.
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