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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Development of voids in pulsed and CW- driven reactive plasmas with large nanoparticle density
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Development of voids in pulsed and CW- driven reactive plasmas with large nanoparticle density

机译：脉冲和连续波驱动的反应等离子体中具有大纳米粒子密度的空隙的形成

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摘要

This contribution deals with the nanoparticle distribution inside of plasma with large nanoparticle density. In particular, the formation of voids i.e. dust-free regions in pulsed and CW discharge regime is analyzed. The discharge was ignited in a mixture of argon and acetylene in the conditions favorable for nanoparticles' formation and growth. The temporal evolution of the spatial distribution of nanoparticles during their growth is studied experimentally by means of a laser light scattering technique. The experimental results show that the void expands much faster in the case of pulsed plasma than in the CW plasma operated for the same gas mixture and at the same (average) input power. In the CW plasma, we observed a rapid expansion of the void after some tens of minutes, whereas the corresponding process in the pulsed plasma occurred after some tens of seconds.
机译：该贡献涉及具有大纳米颗粒密度的等离子体内部的纳米颗粒分布。特别地，分析了在脉冲和CW放电方式中空隙的形成，即无尘区域。在有利于纳米颗粒形成和生长的条件下，在氩气和乙炔的混合物中点燃放电。通过激光散射技术，实验研究了纳米粒子在其生长过程中空间分布的时间演变。实验结果表明，在相同的气体混合物和相同的（平均）输入功率下，脉冲等离子体比CW等离子体中的空隙膨胀快得多。在连续波等离子体中，我们观察到空隙在几十分钟后迅速膨胀，而在脉冲等离子体中相应的过程在几十秒后发生。

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