Keynote talk — Recent development for cost-effective secondary-generation HTS tapes

In the present talk, we firstly give a brief introduction to the latest worldwide achievement on the 2nd generation high-temperature superconducting (HTS) tapes. Then we show our effort on the cost-effective approach to produce the long tapes, including the buffers prepared by electroplating method and the superconducting layers prepared by chemical solution deposition. Various distinct reel-to-reel deposition systems and technical issues are discussed with respective to the cost-effective scaling up of HTS tapes. Main concerns cover the thickness effect, rapid pyrolysis processing and pinning-related field behaviours, which are believed as the significant factors for a promising processing and industrial-level expectation of coated conductors.