Three concepts of high temperature superconductor cables carrying kA currents (RACC CORC and
TSTC) are investigated optimized and evaluated in the scope of their applicability as
conductor in fusion magnets. The magnetic field and temperature dependence of the cables is
measured the thermal expansion and conductivity of structure insulation and filling materials
are investigated. High temperature superconductor winding packs for fusion magnets are
calculated and compared with corresponding low temperature superconductor cases.
