Energy and momentum deposition to plasmas due to the lower hybrid wave by a finite source

Heating and current generation due to the lower hybrid wave are studied using particle simulation. A propagation cone consisting of Fourier expanded modes is emphasized. The trajectory of the propagation cone is well described up to the lower hybrid resonance layer using both cold plasma approximation and the Wentzel-Kramer-Brillouin method. An ion cross field drift due to the ponderomotive force is observed. The modes in the higher side of the spectrum of the antenna play a key role for creation of the ion high energy tail. This process is called the cascade process judging from the time variation of the damping of each mode. The particle model is significantly improved using the elongated grid and the quadric spatial interpolation.