Investigation of dense plasmas with positron waves – ScienceDaily


The study of electron positron ions (EPI) plasma – a fully ionized gas made up of electrons and positrons that contains astrophysical plasmas such as solar winds – has received a lot of attention over the past twenty years. A new study published in EPJ D by Garston Tiofack, Faculty of Science, Marousa University, Cameroon, and colleagues examines the dynamics of positron sound waves (PAWS) in EPI plasmas under the influence of magnetic fields or magnetoplasms.

The authors examined the changes in PAWs using a framework of Korteweg-de-Vries equations (KdV) and modified Korteweg-de-Vries equations (mKdV) with additional diluted PASWs. Mathematical models and numerical simulations carried out by the researchers also enabled them to consider the effect of various other factors on magnetoplasm, including the concentration of hot electrons on that of positrons and applied nonthermal parameters.

The team discovered that the transition to chaos in the magnetoplasm is highly dependent on the frequency and strength of external periodic disturbances.

The study is therefore a useful guide in understanding the changes that occur in magnetoplasm in Auroral Acceleration Regions (AAR) and apply to PAWs. The team’s findings could also help advance the study of astrophysical plasma, which includes solar flares and interstellar plasmas. This gives physicists an insight into the processes that take place in extreme environments such as active galactic nuclei and supernovae explosions.

If the team’s research is brought to the ground, it could also support teams producing plasma around the world. These plasmas play an important role in a new generation of nuclear fusion reactors that aim to generate clean electricity by replicating the processes that take place in the stars.

These systems use plasmas controlled by strong magnetic fields, making understanding such influences essential for future clean energy generation.

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