Plasma Science Technology, VoL6, No 6, Dec. 2004Propagation of an Electromagnetic Wave in a Mixing ofPlasma-dense Neutral GasHu xiwei(胡希偉), Liu minghai(劉明海College of Electric and Electronic Engineering, Huazhong University of Science and Tech-nology, Wuhan 430074, ChinaAbstract The propagation of a normal incident electromagnetic plane wave in a mixture ofrare plasma and dense neutral gas is investigated by one dimensional model. The numerical resultsshow that the amplitude of wave electric field is decayed dramatically and its phase is modulatedobviously in a distance of a few wave lengthes due to the frequent collisions between electrons andneutrals( the collision frequency ve is near or even larger than the wave frequency wo)Keywords: electromagnetic wave, dense neutral gasPACS:52.40Db,5250.Sw,4225Bs1 Introductionuum section (d s a