Two Nb3Sn cable-in-conduit conductors have been procured for Se.C.R.E.T.S.
(Segregated Copper Ratio Experiment on Transient Stability), The two conduc
tors are identical in the fractional cross sections. The only difference is
the location of the copper stabilizer, included either as segregated coppe
r wires or as a copper shell in the superconducting strands. A number of ch
aracterization tests, on individual strands and cabled conductors, have bee
n carried out to establish a solid data base for the assessment of the resu
lts in the main experiment.