https://doi.org/10.1140/epjp/i2015-15222-2
Regular Article
Qualitative structures of electron-acoustic waves in an unmagnetized plasma with q-nonextensive hot electrons
1
Department of Mathematics, Sikkim Manipal Institute of Technology, 737136, Majitar, Rangpo, East-Sikkim, India
2
Department of Mathematics, Siksha Bhavana, Visva Bharati University, Santiniketan, India
* e-mail: asit_saha123@rediffmail.com
Received:
22
June
2015
Revised:
3
September
2015
Accepted:
17
September
2015
Published online:
2
November
2015
The qualitative structures of electron-acoustic waves are investigated in an unmagnetized plasma containing cold electron fluid, q-nonextensive hot electrons and stationary ions. Applying the phase plane analysis, we present all phase portraits of the dynamical system and corresponding solitary- and periodic-wave solutions. Considering an external periodic perturbation, we study the chaotic structure of the perturbed dynamical system. The non-extensive parameter (q), the ratio between hot electron and cold electron number density at equilibrium (α) and speed of the traveling wave (v) play crucial roles for electron-acoustic solitary, periodic and chaotic structures. The results may have relevance in laboratory plasmas as well as space plasma environments.
© Società Italiana di Fisica and Springer-Verlag Berlin Heidelberg, 2015
