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Influence of ion and variable dust charge on electron-dust bremsstrahlung emission spectrum in complex plasmas

Published online by Cambridge University Press:  10 August 2023

Myoung-Jae Lee ,
Naoko Ashikawa  and
Young-Dae Jung Open the ORCID record for Young-Dae Jung [Opens in a new window]
Myoung-Jae Lee
Affiliation:
Department of Physics, Hanyang University, Seoul 04763, South Korea Research Institute for Natural Sciences, Hanyang University, Seoul 04763, South Korea
Naoko Ashikawa
Affiliation:
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
Young-Dae Jung*
Affiliation:
Department of Applied Physics, Hanyang University, Ansan, Kyunggi-Do 15588, South Korea
*
†Email address for correspondence: ydjung@hanyang.ac.kr
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Abstract

The bremsstrahlung process is studied in complex plasmas including the influence of ions and variable dust charge. The electron-dust particle bremsstrahlung radiation cross-section (e-D-BRCS) is obtained with the analytic expression for the effective dust charge in terms of the Debye length and the temperature ratio. The e-D-BRCS is found to be reduced with either the decrease of ion temperature or increase of electron temperature. The ion density effect is found to be more important in the small electron temperature domain. Interestingly, the influence of ion temperature and density is found to be independent of the bremsstrahlung emission energy. The effective dust charge is also found to decrease with an increase of the ratio of the electron temperature to the ion temperature. In addition, it is found that the effective dust charge increases with an increase of the ratio of the electron density to the ion density. Moreover, the e-D-BRCS is found to be increased with the decrease of ion density.

Keywords

complex plasmaselection-dust particle bremsstrahlung
Type
Research Article
Information
Journal of Plasma Physics , Volume 89 , Issue 4 , August 2023 , 455890401
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Copyright
Copyright © The Author(s), 2023. Published by Cambridge University Press

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