Development of fully kinetic code to simulate lower hybrid wave and plasma interactions on EAST

A particle-in-cell simulation code GCPIC is developed to study interactions of plasmas and lower hybrid waves (LHWs). For the given wave parameters used in LHW experiments on EAST tokamak, the launched wave experiences the mode conversion of slow and fast modes in a typical H-mode discharge. The wave amplitude is enhanced during the back-and-forth propagations between the mode conversion layer and the cutoff layer. As a result, the parametric decays are observed near the mode-conversion layer, The pump wave decays into a LHW at a lower frequency which can penetrate the mode-conversion layer and low frequency electromagnetic waves which can resonantly interact with electrons, resulting the electron heating. (author)