I am currently working on my project in plasma physics at Mansoura University, Egypt. The title of my project is:

"Effects of the Non-Extensive Parameters on the Propagation of Ion Acoustic Waves in a Six-Component Cometary Plasma System."

In this model, the plasma system includes cometary and solar electrons, H₂O⁺ ions, He⁺ ions, and hydrogen ions from both the Sun and the comet. I assume that the cometary electrons, solar electrons, and solar hydrogen ions are non-Maxwellian and follow the non-extensive Tsallis distribution.

I am trying to formulate the proper expressions for the number density of these distributed components, particularly how to include the Tsallis parameter and the electrostatic potential ,

Could anyone please guide me on:

• How to correctly derive or write these density expressions under the non-extensive approach?
• Are there standard references or derivations commonly used in similar plasma models?

Any help or references would be greatly appreciated.

Thank you in advance!

Best regards, Abdelwahab Mostafa Mohamed