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Peer-reviewedCC BY 4.0Monthly Notices of the Royal Astronomical Society

Electrostatic high-frequency oscillations in partially ionized two-fluid plasmas

  • Amar P Misra1
  • Jyoti Turi2
  • Vinod Krishan3
  1. 1Siksha Bhavana, Visva-Bharati University Department of Mathematics, , Santiniketan-731 235 ,
  2. 2Swami Vivekananda University Department of Mathematics, , Barrackpore, North 24 Parganas-700 121 ,
  3. 3Indian Institute of Astrophysics , Bangalore 560 034 ,
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Abstract

We report the existence of a new electrostatic mode in an electron-neutral collision-dominated, partially ionized plasma, in which electrons and the neutral gas are coupled through collisions to behave as a single electron-neutral (EN) fluid, and positive ions behave as a separate fluid. Interestingly, the EN-ion plasma collectively oscillates with a frequency close to or higher than the ion-plasma oscillation frequency (ωpi), and the corresponding wave mode appears similar to Langmuir waves in classical plasmas. However, when ions form only a stationary background, the EN fluid oscillates at a frequency much lower than ωpi. Estimates suggest that such high-frequency electrostatic modes may be excited in laboratories and in the solar photosphere.

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Cite

BibTeXRIS
BibTeX
@article{misra2026electrostatic,
  title = {{Electrostatic high-frequency oscillations in partially ionized two-fluid plasmas}},
  author = {Amar P Misra and Jyoti Turi and Vinod Krishan},
  journal = {Monthly Notices of the Royal Astronomical Society},
  year = {2026},
  month = oct,
  doi = {10.1093/mnras/stag2022},
  url = {https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stag2022/8994289},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Electrostatic high-frequency oscillations in partially ionized two-fluid plasmas
AU  - Amar P Misra
AU  - Jyoti Turi
AU  - Vinod Krishan
PY  - 2026
DA  - 2026/10/23
JO  - Monthly Notices of the Royal Astronomical Society
DO  - 10.1093/mnras/stag2022
UR  - https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stag2022/8994289
AB  - We report the existence of a new electrostatic mode in an electron-neutral collision-dominated, partially ionized plasma, in which electrons and the neutral gas are coupled through collisions to behave as a single electron-neutral (EN) fluid, and positive ions behave as a separate fluid. Interestingly, the EN-ion plasma collectively oscillates with a frequency close to or higher than the ion-plasma oscillation frequency (ωpi), and the corresponding wave mode appears similar to Langmuir waves in classical plasmas. However, when ions form only a stationary background, the EN fluid oscillates at a frequency much lower than ωpi. Estimates suggest that such high-frequency electrostatic modes may be excited in laboratories and in the solar photosphere.
SN  - 0035-8711
SN  - 1365-2966
ER  -