Measurements of coupling losses in superconducting cable-in-conduit conductors affected by internal transverse electromagnetic-forces

In order to elucidate the dependence of the internal electromagnetic-forces on the inter. strand coupling loss in superconducting cable-in-conduit conductors, we develop a new measuring system. This system enables us to measure the coupling loss of large scale conductors with transport current of 20kA and the transverse magnetic field of 3.22T bias in the wide frequency range of the super-posed ripple field of 0.1-300Hz. The data of the preliminary measurements show that the change of the coupling loss is only a little in the low frequency range to the extent of the electromagnetic-force of 0.44MPa in the case of IS-conductor of the poloidal field coil for LHD.