Excitation of upper‐hybrid plasma wake wave by a low‐frequency extraordinary electromagnetic wave

Abstract

The excitation of upper-hybrid wake electrostatic wave by interaction of an extraordinary Gaussian wave propagating perpendicular to the external magnetic field in a cold homogeneous plasma is investigated using magnetohydrodynamics theory. The plasma oscillations can be excited due to the charge separation appeared by the ponderomotive force of the electromagnetic wave whose frequency is considered in the lower pass band. By obtaining the equation governing the plasma wake, the dependency of the wake amplitude on the physical parameters is studied. It is observed that larger wake oscillation takes place when the pulse length is approximately close to 3λ p /π and the X-wave frequency is greater than ω p , which means that the phase velocity is less than the speed of light in vacuum (v p < c).

Effect of mutual interaction of two cosh-Gaussian laser beams on upper hybrid wave excitation and subsequent electron acceleration

“…The excitation of UHW by intense laser beams has been extensively investigated in laser-plasma interactions [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. In these studies, various profiles of laser beam such as Gaussian, hollow Gaussian, q-Gaussian, Laguerre-Gaussian, etc have been used.…”

“…10 and N 20 are the slowly varying real function of the space coordinate. Substituting equation(19) into equation(18), one can obtain the equation for N 10 and N 20 by equating the coefficient of…”