Wave breaking field of relativistically intense electrostatic waves in electronegative plasma with super-thermal electrons

0561711 - FZÚ 2023 RIV GB eng J - Článek v odborném periodiku
Mukherjee, Arghya
Wave breaking field of relativistically intense electrostatic waves in electronegative plasma with super-thermal electrons.
Scientific Reports. Roč. 12, č. 1 (2022), č. článku 12263. ISSN 2045-2322. E-ISSN 2045-2322
Grant CEP: GA MŠMT EF15_003/0000449
Grant ostatní: OP VVV - HiFi(XE) CZ.02.1.01/0.0/0.0/15_003/0000449
Institucionální podpora: RVO:68378271
Klíčová slova: negative-ions * laser acceleration * amplitude generation * physics * oscillations * ultrashort pulses * beams
Obor OECD: Particles and field physics
Impakt faktor: 4.6, rok: 2022
Způsob publikování: Open access

The wave breaking limit of relativistically intense electrostatic waves in an unmagnetised electronegative plasma, where electrons are alleged to attach onto neutral atoms or molecules and thus forming a signifcant amount of negative ions, has been studied analytically. A nonlinear theory has been developed, using one-dimensional (1D) relativistic multi-fuid model in order to study the roles of super-thermal electrons, negative ion species and the Lorentz factor, on the dynamics of the wave. A generalised kappa-type distribution function has been chosen for the velocities of the electrons, to couple the densities of the fuids. By assuming the travelling wave solution, the equation of motion for the evolution of the wave in a stationary wave frame has been derived and numerical solutions have been presented. Studies have been further extended, using standard Sagdeev pseudopotential method, to discover the maximum electric feld amplitude sustained by these waves.
Trvalý link: https://hdl.handle.net/11104/0334231