The X-ray emission of micro-capillary target irradiated by fs laser

An experimental investigation on the interaction between ultra-short intens e laser pulses and microcapillary has been carried out. The X spectrum from glass microcapillary is obtained successfully. Experimental results show t hat the X-ray radiation enhanced intensively with increasing the capillary length. In the same condition, the X-ray radiation yields of capillary targ et are more than one order higher than that of plane one. The average elect ron temperature of capillary plasma is higher when the laser pulse energy i s increased.