Ion-Acoustic Compressive and Rarefactive Double Layers in Magnetoplasma having Superthermal Electrons and Positrons

Publication Issue: 
Volume 42, Issue 1, 2021
Page No: 
Date Received: 
Sunday, May 30, 2021
Authors' Name: 
J. K. Chawla
P. C. Singhadiya
Authors' Affiliation and Address: 
Department of Physics, Govt. College Tonk, Rajasthan, India-304001
Department of Physics, Seth R.L. Saharia Govt. College Kaladera, Rajasthan, India-303801
Ion–acoustic double layers (IADLs) have been studied in magnetized plasma in presence of superthermal electrons and positrons. In this investigation, we have derived the modified Korteweg-de Vries (m-KdV) equation using the reductive perturbation method (RPM). We have calculated the phase velocity, amplitude and width of compressive as well as rarefactive IADLs for selected set of parameters. We found that magnetization of plasma affects the width of IADLs but not the amplitude. The phase velocity of the waves increases as spectral index increases. Our present investigations may be helpful to understand the double layers in astrophysical environments where superthermal electrons and positrons are present.