Temporally resolved optical emission spectroscopic investigations on a nanosecond self-pulsing micro-thin-cathode discharge

Temporally resolved optical emission spectroscopic investigations on a nanosecond self-pulsing micro-thin-cathode discharge
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纳秒自脉冲微薄阴极放电的时间分辨光学发射光谱研究

DOI:
10.1088/0963-0252/21/4/045015
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发表时间:
2012
影响因子:
3.8
通讯作者:
U. Czarnetzki
U. Czarnetzki
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
N. Sadeghi;D. Luggenhölscher;U. Czarnetzki

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在大气压下,在Ar中,由于纳秒火花放电的周期性点火与长余辉(几百纳秒),超薄阴极放电工作在自脉冲模式。在这种模式下,纳秒火花和余辉的光发射光谱进行了研究。利用Ar的3p6 → 1s5跃迁(415.859nm)的Stark展宽和位移测量了纯Ar放电中的电子密度和温度。纳秒火花的电子密度约为10 17 cm− 3,电子温度为5 eV。气体温度是通过分析与0.5%N2的混合物的N2第二正系统的发射光谱获得的。测量的气体温度与零维动力学模拟的结果吻合得很好。单独的发射线的空间分布的时间发展表明,不仅纳秒火花,但余辉也强烈本地化。发射光谱的时间发展提供了有力的证据,纳秒火花放电,由于电子发射,发生在自脉冲模式与纳秒电流峰值。
At atmospheric pressure in Ar, a micro-thin-cathode discharge operates in a self-pulsing mode due to periodic ignition of a nanosecond spark discharge with a long living afterglow (several hundred nanoseconds). In this mode, optical emission spectra of the nanosecond spark and the afterglow are investigated. The electron density and temperature in the pure Ar discharge are measured by the Stark broadening and shift of the Ar 3p 6→ 1s 5 transition (415.859 nm). The nanosecond spark has an electron density of the order of 10 17 cm− 3 and an electron temperature of 5 eV. The gas temperature is obtained by analyzing the emission spectra of the N 2 second positive system with an admixture of 0.5% N 2. The measured gas temperature agrees very well with the result of a zero-dimensional kinetic simulation. The temporal development of the spatial distribution of separate emission lines shows that not only the nanosecond spark but the afterglow is also strongly localized. The temporal development of the emission spectrum provides powerful proof that the nanosecond spark discharge, due to thermionic emission, occurs in the self-pulsing mode with nanosecond current peaks.
DOI: 10.1088/0022-3727/44/25/252001
发表时间: 2011
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脉冲微空心阴极放电的氙准分子发射
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发表时间: 2001
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期刊: Journal of Physics D: Applied Physics
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发表时间: 1983
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作者:
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