Experimental Study of Dusty Plasma with Carbon Nanoparticles in Ar/C₂H₂ DC Glow Discharge

This study presents experimental results on the formation and behavior of carbon nanoparticle-based dusty plasma in a DC glow discharge with an Ar/C₂H₂ gas mixture. The discharge was generated in a Π-type glass tube configuration, analogous to the PK-4 facility aboard the ISS. The results demonstrate that carbon nanoparticles grow in distinct generational stages, with cyclic growth observed during plasma-off intervals. This behavior is consistent with typical nanoparticle synthesis dynamics in low-temperature plasma, as confirmed through direct visual diagnostics. It was also found that the presence of nanoparticles within the positive column significantly affects the glow discharge’s luminescence intensity. Moreover, a clear dependence was observed between the discharge voltage and the timing of nanoparticle generation cycles: increasing the discharge voltage leads to a reduction in the interval between successive nanoparticle formation events.





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