Progress in application of high temperature superconductor in tokamak magnets

► We report on first results of the use of HTS in tokamak Golem poloidal field coils. ► We show that superconductivity has been achieved at 91 K with liquid Nitrogen cooling. ► We show that current in 12 mm SuperPower YBCO tape used can exceed 1 kA in pulses and current ramp speed can exceed 100 kA/s. ► We show that quenches do not cause degradation in the coil performance if controlled. ► We report on plans and progress in design and constructions of the first full-HTS tokamak ST25.