Effect of rays leaked from cylindrical plasmas on light strength distribution

Based on a simlified model of gain region,the propagation and amplification of capillary discharge X-ray within the cylindrical plasma with parabolic eletron density profile are studied with the geometrica loptics approximation. The change relation of light intensity of X-ray leaked from plasmas side is given.At the same time,we analyse the effect of ray on intensity distribution and beam figure.