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Study on propagation properties of laser guiding EMP in a finite magnetic field

XIA Xin-ren,YIN Cheng-you(Hefei Electronic Engineering Institute,Hefei 230037)  
The geometric model of laser plasma channel(LPC) guiding electromagnetic pulse(EMP) in a finite electromagnetic field is created;when LPC is in lossy gas the propagation properties of the normal modes of LPC guiding EMP are studied;and then the wave equation of longitudinal electromagnetic field and the relationship between transverse and longitudinal electromagnetic field in anisotropic medium are derived under the generalized cylindrical coordinate system.By applying the boundary conditions of electromagnetic fields,the strict characteristic equation of mode propagation for LPC guiding EMP is deduced,and the effects of plasma parameter,surrounding material and external magnetic field on propagation are discussed.The results show that the propagation properties of magnetized LPC guiding EMP are easy to be controlled compared with those without external magnetic field or an infinite external magnetic field applied.
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