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Possible Mechanisms of String Formation in Complex Plasmas at Elevated Pressures
Possible mechanisms of particle attraction providing formation of the field aligned microparticle strings in complex plasmas at elevated gas pressures are theoretically investigated in the light of the Plasmakristall-4 (PK-4) experiment on board the International Space Station. The particle interact...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7827146/ https://www.ncbi.nlm.nih.gov/pubmed/33435498 http://dx.doi.org/10.3390/molecules26020308 |
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author | Yaroshenko, Victoria Pustylnik, Mikhail |
author_facet | Yaroshenko, Victoria Pustylnik, Mikhail |
author_sort | Yaroshenko, Victoria |
collection | PubMed |
description | Possible mechanisms of particle attraction providing formation of the field aligned microparticle strings in complex plasmas at elevated gas pressures are theoretically investigated in the light of the Plasmakristall-4 (PK-4) experiment on board the International Space Station. The particle interaction energy is addressed by two different approaches: (i) using the dynamically screened wake potential for small Mach numbers derived by Kompaneets et al., in 2016, and (ii) introducing effect of polarization of the trapped ion cloud by discharge electric fields. Is is found that both approaches yield the particle interaction energy which is independent of the operational discharge mode. In the parameter space of the performed experiments, the first approach can provide onset of the particle attraction and string formation only at gas pressures higher than 40–45 Pa, whilst the mechanism based on the trapped ion effect yields attraction in the experimentally important pressure range 20–40 Pa and may reconcile theory and observations. |
format | Online Article Text |
id | pubmed-7827146 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-78271462021-01-25 Possible Mechanisms of String Formation in Complex Plasmas at Elevated Pressures Yaroshenko, Victoria Pustylnik, Mikhail Molecules Article Possible mechanisms of particle attraction providing formation of the field aligned microparticle strings in complex plasmas at elevated gas pressures are theoretically investigated in the light of the Plasmakristall-4 (PK-4) experiment on board the International Space Station. The particle interaction energy is addressed by two different approaches: (i) using the dynamically screened wake potential for small Mach numbers derived by Kompaneets et al., in 2016, and (ii) introducing effect of polarization of the trapped ion cloud by discharge electric fields. Is is found that both approaches yield the particle interaction energy which is independent of the operational discharge mode. In the parameter space of the performed experiments, the first approach can provide onset of the particle attraction and string formation only at gas pressures higher than 40–45 Pa, whilst the mechanism based on the trapped ion effect yields attraction in the experimentally important pressure range 20–40 Pa and may reconcile theory and observations. MDPI 2021-01-09 /pmc/articles/PMC7827146/ /pubmed/33435498 http://dx.doi.org/10.3390/molecules26020308 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Yaroshenko, Victoria Pustylnik, Mikhail Possible Mechanisms of String Formation in Complex Plasmas at Elevated Pressures |
title | Possible Mechanisms of String Formation in Complex Plasmas at Elevated Pressures |
title_full | Possible Mechanisms of String Formation in Complex Plasmas at Elevated Pressures |
title_fullStr | Possible Mechanisms of String Formation in Complex Plasmas at Elevated Pressures |
title_full_unstemmed | Possible Mechanisms of String Formation in Complex Plasmas at Elevated Pressures |
title_short | Possible Mechanisms of String Formation in Complex Plasmas at Elevated Pressures |
title_sort | possible mechanisms of string formation in complex plasmas at elevated pressures |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7827146/ https://www.ncbi.nlm.nih.gov/pubmed/33435498 http://dx.doi.org/10.3390/molecules26020308 |
work_keys_str_mv | AT yaroshenkovictoria possiblemechanismsofstringformationincomplexplasmasatelevatedpressures AT pustylnikmikhail possiblemechanismsofstringformationincomplexplasmasatelevatedpressures |