EPJ D Highlight - Investigating dense plasmas with positron waves

Chaotic motions of travelling positron acoustic waves in the magnetoplasma system (Mouhammadoul. B. B., Tiofack. C. G. L., Alim. A., Mohamadous. A.)

Astrophysical and lab-created plasmas under the influence of magnetic fields are the source of intense study. New research seeks to understand the dynamics of position waves travelling through these clouds of highly ionised gas.

The investigation of Electron-Positron-Ion (EPI) plasma — a fully ionised gas of electrons and positrons that includes astrophysical plasmas like solar winds — has attracted a great deal of attention over the last twenty years. A new study published in EPJ D by Garston Tiofack, Faculty of Sciences, University of Marousa, Cameroon, and colleagues, assesses the dynamics of positron acoustic waves (PAWS) in EPI plasmas whilst under the influence of magnetic fields, or magnetoplasmas.

The authors studied the changes in PAWs using a framework of Korteweg-de Vries (KdV) and modified Korteweg-de Vries (mKdV) equations finding a former led to compressive positron acoustic solitary waves (PASWs), whilst the latter resulted in the same and additional rarefactive PASWs. Mathematical models and numerical simulations performed by the researchers also allowed them to consider the effect of various other factors on the magnetoplasma including the concentration of hot electrons to that of positrons and applied nonthermal parameters.

The team discovered that the transition to chaos in the magnetoplasma depends strongly on the frequency and strength of external periodic perturbations.

The study thus serves a useful guide to understanding the changes that occur at magnetoplasma in Auroral Acceleration Regions (AAR) and as they apply to PAWs. The team’s results could also help develop research into astrophysical plasma, which include solar flares and interstellar plasmas thus giving physicists a window into the processes that take place in extreme environments like active galactic nuclei and supernovae explosions.

Bringing the team’s research down to earth somewhat, it could also assist teams which generate plasma across the globe. These plasmas play a major role in a new generation of nuclear fusion reactors, which aim to generate clean power by replicating the processes that occur in the stars.

These plants use plasmas which are controlled with the use of powerful magnetic fields, thus making the understanding of such influences of critical importance to future clean energy production.

This was our first experience of publishing with EPJ Web of Conferences. We contacted the publisher in the middle of September, just one month prior to the Conference, but everything went through smoothly. We have had published MNPS Proceedings with different publishers in the past, and would like to tell that the EPJ Web of Conferences team was probably the best, very quick, helpful and interactive. Typically, we were getting responses from EPJ Web of Conferences team within less than an hour and have had help at every production stage.
We are very thankful to Solange Guenot, Web of Conferences Publishing Editor, and Isabelle Houlbert, Web of Conferences Production Editor, for their support. These ladies are top-level professionals, who made a great contribution to the success of this issue. We are fully satisfied with the publication of the Conference Proceedings and are looking forward to further cooperation. The publication was very fast, easy and of high quality. My colleagues and I strongly recommend EPJ Web of Conferences to anyone, who is interested in quick high-quality publication of conference proceedings.

On behalf of the Organizing and Program Committees and Editorial Team of MNPS-2019, Dr. Alexey B. Nadykto, Moscow State Technological University “STANKIN”, Moscow, Russia. EPJ Web of Conferences vol. 224 (2019)

ISSN: 2100-014X (Electronic Edition)

© EDP Sciences