Double capillary scheme is proposed for high performance electrical discharge in a capillary. This scheme allows more than103shots without significant destruction. It is shown that a thin main capillary can be filled with the plasma formed in a trigger capillary discharge so that the discharge in the main capillary can be excited and a hollow distribution of electron density can be obtained with concentration of up to a few1019cm−3.Main properties of this scheme are reported. ©1997 American Institute of Physics.