Investigations of the spatio-temporal build-up of atomic oxygen inside the micro-scaled atmospheric pressure plasma jet

Investigations of the spatio-temporal build-up of atomic oxygen inside the micro-scaled atmospheric pressure plasma jet
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微尺度大气压等离子体射流内原子氧时空积累的研究

DOI:
10.1140/epjd/e2010-00240-3
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发表时间:
2010
期刊:
The European Physical Journal D
影响因子:
--
通讯作者:
V. Schulz-von der Gathen
V. Schulz-von der Gathen
中科院分区:
--
文献类型:
--
作者:
N. Knake;V. Schulz-von der Gathen

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利用双光子吸收激光诱导荧光光谱技术研究了微尺度大气压等离子体射流中产生的原子氧密度随外加功率、气体混合比和气体流速等参数变化的空间分辨过程。沿着放电通道,观察到等离子体内原子氧密度的增加。密度显示出指数渐近收敛到接近流出物的平衡。在放电后的流出物中,可以发现一个指数空间减小。典型的几百μm的上升距离随着所施加的功率而减小,并且随着气体速度和氧混合物而增大。最大原子氧密度随外加功率和混合分子氧的增加而增加,最大可达1016 cm-3以上。最大原子氧密度随气体流速的增加而增加,光学发射光谱测量表明,在低气体流速下,沿沿着的氮发射强烈增加。
The ascent of atomic oxygen densities created inside the micro-scaled atmospheric pressure plasma jet has been investigated spatially resolved under parameter variations such as applied power, gas mixture and gas velocity using two-photon absorption laser induced fluorescence spectroscopy. Along the discharge channel an increase of the atomic oxygen density within the plasma is observed. The density shows an exponentially asymptotic convergence into an equilibrium close to the effluent. In the post-discharge effluent an exponential spatial decrease can be found. Typical ascent distances of a few hundreds ofμm decrease with the applied power and increase with gas velocity and oxygen admixture. The maximum atomic oxygen density increases with applied power and admixed molecular oxygen up to more than 1016cm-3. An increase of the maximum atomic oxygen density with increasing gas velocity has been found. Optical emission spectroscopy measurements indicate a strong increase of the nitrogen emission at low gas flow rates along the channel.
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发表时间: 2007-05
影响因子: 3.8
作者:
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发表时间: 2010
期刊: Journal of Physics: Conference Series
影响因子: --
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