Spatially and temporally resolved optical spectroscopic investigations inside a self-pulsing micro thin-cathode discharge

Spatially and temporally resolved optical spectroscopic investigations inside a self-pulsing micro thin-cathode discharge
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自脉冲微型薄阴极放电内部的空间和时间分辨光学光谱研究

DOI:
10.1088/0022-3727/44/25/252001
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发表时间:
2011
期刊:
Journal of Physics D: Applied Physics
影响因子:
--
通讯作者:
U. Czarnetzki
U. Czarnetzki
中科院分区:
--
文献类型:
--
作者:
M. Aramaki;S. Mohr;Y. Celik;D. Luggenhölscher;U. Czarnetzki

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研制了一种光纤探针,用于研究大气压下自脉冲微薄阴极放电中氩1s5态粒子数密度的时间发展和空间分布以及余辉发射。直径(125 µm)约为放电直径(200 µm)一半的纤维探针沿着放电轴移动。将波长为696.73nm的可调谐半导体激光与氩原子1s5 → 2p2跃迁共振耦合到光纤探针的远端。空间微分吸光度产生的1s 5状态的轴向分布。此外,该光纤用于类似地确定各种氩线的空间分辨光发射。发射和吸收曲线都证实,在余辉中,等离子体强烈地定位在放电的孔内。定性地,测量值与零维模拟的结果非常一致。长余辉与亚稳原子的高布居密度有关。
A fibre probe is developed to investigate the temporal development and the spatial distribution of the population density of argon 1s 5 state and the emission in the afterglow in a self-pulsing micro thin-cathode discharge at atmospheric pressure. The fibre probe with a diameter (125 µm) of about half the discharge diameter (200 µm) is moved along the discharge axis. A tunable diode laser beam at 696.73 nm at resonance with the argon 1s 5→ 2p 2 transition is coupled into the far end of the fibre probe. The spatially differentiated absorbance yields the axial distribution of the 1s 5 state. In addition, the fibre is used to determine similarly the spatially resolved optical emission of various argon lines. Both the emission and the absorption profiles confirm that, in the afterglow, the plasma is strongly localized inside the hole of the discharge. Qualitatively, the measurements agree very well with the results of a zero-dimensional simulation. The long living afterglow is related to the high population density of the metastable atoms.
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发表时间: 2011-03
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影响因子: --
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