Wave breaking thresholds of dust-ion-acoustic waves in lunar plasma: a study of Earth’s magnetosphere-moon ionosphere interactions

This study looks at how electrostatic dust-ion-acoustic waves (DIAWs) behave and breakdown in multicomponent plasmas containing streaming and superthermal particle populations. We use a multi-fluid hydrodynamic framework to develop an energy-like pseudopotential equation that tells us the condition of the electric field at which waves break. A parametric analysis is performed to find out how plasma parameters like the Mach number (phase speed), solar wind beam velocity, beam density, ion mass and density ratios, and the electron superthermality index affect the structure of the pseudopotential and the maximum electric field that can exist before wave breaking begins. We found that greater Mach numbers and beam speeds make the pseudopotential well deeper and raise the wave-breaking threshold. This means that DIAWs are more stable and can retain more energy. Also, a higher ratio of ion density or beam density makes electrostatic pressure and charge separation greater. This makes the wave-breaking field grow a little bit more. Also, raising the superthermality index, which shows that electron distributions are becoming more thermalized, makes the wave structure more stable and makes it easier to handle larger electric fields. The results of this study have a significant impact on the ways in which particles in natural moon plasma and in systems constructed by humans heat up, speed up, and remain stable. When engineers have a better understanding of how wave-breaking thresholds are affected by solar wind conditions and particle distributions, they are better able to design spacecraft that can tolerate challenging circumstances. By doing so, we are also able to better understand the behavior of plasma in space without shielding.