Low-frequency electrostatic waves and chaotic motions in collisional superthermal plasmas

Authors

• Mostafa Mehdipoor * ¹
• Yaghoob Mohammadmoradi ²

1. Department of Physics, Faculty of Science, Gonbad Kavous University, Gonbad Kavous, Iran
2. Department of physics, Aliabad Katoul Branch, Islamic Azad University, Aliabad Katoul, Iran

Abstract

In this work, the dynamics and chaotic behavior of ion-acoustic (IA) traveling waves in a collisional plasma consisting of cold ions, superthermal electrons, and immobile neutral particles are studied. The effect of ion-neutral collisions is also considered here. Using the reductive perturbation technique, a forced modified Korteweg-de Vries (FMK-dV) equation is obtained in the presence of an externally applied force. The periodic, quasi-periodic, and chaotic motions of IA waves are investigated by considering three-dimensional phase portraits and time-series analysis. It is noted that ion-neutral collisional frequency, strength, and frequency of the external periodic force play an important role in controlling the dynamic motion of ion-acoustic waves. Moreover, it is found that the strength of the external perturbation can be considered as the main parameter for the transition from quasi-periodic motion to chaotic motion.

Keywords

• Chaotic motions
• Collisional plasmas
• Forced modified K-dV equation
• Ion-acoustic waves
• Traveling waves