Dusty plasma diagnostics methods for charge, electron temperature, and ion density
- Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa 52242 (United States)
- Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow 127412 (Russian Federation)
- Max-Planck-Institut fuer extraterrestrische Physik, 85748 Garching (Germany)
Diagnostic methods are developed to measure the microparticle charge Q and two plasma parameters, electron temperature T{sub e}, and ion density n{sub i}, in the main plasma region of a dusty plasma. Using video microscopy to track microparticles yields a resonance frequency, which along with a charging model allows an estimation of Q and T{sub e}. Only measurements of microparticle position and velocity are required, unlike other methods that use measurements of T{sub e} and plasma parameters as inputs. The resonance frequency measurement can also be used with an ion drag model to estimate n{sub i}. These methods are demonstrated using a single-layer dusty plasma suspension under microgravity conditions.
- OSTI ID:
- 21371156
- Journal Information:
- Physics of Plasmas, Vol. 17, Issue 5; Other Information: DOI: 10.1063/1.3400225; (c) 2010 American Institute of Physics; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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