Theoretical Study on Weibel instability in the existence of large amplitude Langmuir wave inside a Plasma

¹ Department of Physics, Amity School of Applied Sciences, Amity University Haryana, Gurugram - 122051, India.
² Plasma Science and Technology Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi - 110016, India
³ Department of Physics, Swami Shraddhanand College, University of Delhi, Alipur, Delhi - 110036, India.
⁴ Department of Physics, Government College, Hisar, Haryana, India 125001.

^* Corresponding author: ak8689049@gmail.com.

Abstract

This paper investigates how an electrostatic Langmuir wave having large amplitude affects the Weibel instability (WI) in the existence of ions and an electron beam. Two Langmuir side band waves are produced by coupling of EM perturbation to the Langmuir wave. The Langmuir wave (LW) increases the growth rate beyond its linear value. Here, we noticed that the growth rate Γ(sec⁻¹) scales linearly with the electron beam velocity v_be and 1/2 power of the electron beam density n_be. As we increase the density of ions inside the plasma, the growth rate stabilizes. Additionally, we find that the growth rate is very sensitive to the plasma frequency of ions. Therefore, our work finds an application in space, galactic cosmic rays and supernovas. Also, our work covers a range of application from the development of fusion power to understand the various astrophysical phenomena.