FRICTION DOMINATION WITH SUPERCONDUCTING STRINGS

We investigate the evolution of a superconducting string network with arbitrary, constant string current in the friction dominated regime. I n the absence of an external magnetic field the network always reaches a scaling solution. However, for string current stronger than a criti cal value, it is different than the usual horizon scaling of the nonsu perconducting string case. In this case the friction domination era ne ver ends. Whilst the superconducting string network can be much denser than usually assumed, it can never dominate the universe energy densi ty. It can, however, influence the cosmic microwave background radiati on and the formation of large scale structure. When embedded in a prim ordial magnetic field of sufficient strength, the network never reache s scaling and, thus, eventually dominates the universe evolution.