Interaction of injected dust particles with metastable neon atoms in a radio frequency plasma

Details Interaction of injected dust particles with metastable neon atoms in a radio frequency plasma Interaction of injected dust particles with metastable neon atoms in a radio frequency plasma

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008njph...10e3010d&link_type=abstract

New Journal of Physics, Volume 10, Issue 5, pp. 053010 (2008).

Physics

8

Scientific paper

Spatial density and temperature profiles of neon metastables produced in a radio frequency (rf) discharge were investigated by means of tunable diode laser absorption spectroscopy. The experiments were performed in the PULVA1 reactor, which is designed for the study of complex (dusty) plasmas. The line averaged measured density is about 1.5×1015 m-3 in the bulk and drops almost linearly in the plasma sheath. The gas temperature is in the range of 370 390 K. The flow of metastable atoms in the plasma sheath deduced from the spatial density distribution is dominated by the flow towards the rf electrode. The sheath length is supposed as the effective diffusion length in the plasma sheath region. This approximation was used to investigate the interaction of injected particles with the plasma. The observations and estimation provide evidence for a significant interaction between metastable atoms and powder particles which is important for energy transfer from the plasma to the particles. The power per unit area absorbed by dust particles due to the collision of metastable atoms with the dust particle surface is in the range of a few tens of mW m-2.

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