Abstract
Abstract The paper discusses material science problems in producing a superconducting wire for ITER magnetic system winding. Results of investigation and development of methods for producing single superconductors containing 45 000 niobium filaments 2 mm diameter including made up of largely composite precursors up to 300 mm diameter, are presented. The problems are considered related to the manufacture of copper channel shapes with a resistive barrier. Data on the development of soldering schedules for winding wire elements and leaktight welding of a steel sheath containing soldered transposed multifilamentary superconductors and copper channel shapes are given. The need is indicated to develop non-standard equipment lines for manufacturing long pieces of a winding wire.
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