Work

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

Year: 2026

Type: article

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.

Source: Monthly Notices of the Royal Astronomical Society

DOI: 10.1093/mnras/stag2022

Authors: Amar P Misra, Jyoti Turi, Vinod Krishan

Institutions: Visva-Bharati University, Swami Vivekananda University, Indian Institute of Astrophysics

Language: English

Topic: Dust and Plasma Wave Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,046

Funder: Council of Scientific and Industrial Research, India