太赫兹波在磁化等离子体中的3维传播与衰减特性OA

To study the propagation characteristics of terahertz(THz)waves in the atmospheric pressure plasma(APP),the propagation vector was analytically derived as a function of the electric field intensity and magnetized plasma parameters.A three-dimensional propagation and attenuation model for terahertz waves in magnetized plasma was established.The condition for the electric field to satisfy the"blackout"phenomenon during aircraft re-entry the atmosphere was proposed.Simulation results show that the propagation and attenuation vectors of the waves in magnetized plasma are closely related to the electric field polarization.The specific conditions for the"blackout"phenomenon caused by terahertz waves were investigated.The numerical results indicate that when the terahertz wave frequency is below 1 THz,frequency variation exerts a significant effect on the three components of the propagation vector,and the propagation direction reverses as the frequency increases.The vertical propagation components along the steady magnetic field direction tends to stabilize as the frequency increases above 1 THz.The collision frequency affects propagation in both the x-axis and y-axis directions to some extent,and has little effect on propagation in the z-axis direction,but affects attenuation in that direction.The electron number density has little influence on the three-dimensional propagation and attenuation of THz waves.