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Updated: Jun 22, 2026

Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas
Published on: April 3, 2018
Dust-induced modulation of the atomic emission in a dusty argon discharge
1Institut für Physik, Ernst-Moritz-Arndt-Universität, D-17487 Greifswald, Germany.
Abstract:
The spectral emission of argon atoms in a dusty rf discharge plasma has been determined. For that purpose, the spatially and temporally resolved emission of the argon atoms during the rf cycle was measured using a gated intensified charge-coupled device camera. While dust particles of 2-3 microm diameter trapped in the sheath lead to an increased plasma emission during the sheath expansion phase, larger particles of 10-12 microm diameter result in a decreased emission. This behavior is explained by the combined action of electron density reduction due to the charging dynamics in the sheath and the increase of electron temperature to compensate plasma losses at the dust.
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