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TY - CONF AU - Alekseev, M.V. AU - Abdyukhanov, I.M. AU - Drobyshev, V.A. AU - Kravtsova, M.V. AU - Krylova, M.V. AU - Lykianov, P.A. AU - Mareev, K.A. AU - Pantsyrny, V.I. AU - Polikarpova, M.V. AU - Potapenko, M.M. AU - Shlyakhov, M.Y. AU - Silaev, A.G. AU - Tsapleva, A.S. AU - Zernov, S.M. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Niobium Semiproducts for the Superconducting Strands and SRF Cavities in Russia J2 - Proc. of SRF2019, Dresden, Germany, 30 June-05 July 2019 CY - Dresden, Germany T2 - International Conference on RF Superconductivity T3 - 19 LA - english AB - The melting regimes of the niobium ingots with high chemical purity and low hardness for the Nb₃Sn, NbTi and other superconducting materials manufacture have been developed at SC "VNIINM". Using this niobium material and by the SC "VNIINM" manufacture regimes at the SC "Chepetsky Mechanical Plant" 220 tons of Nb₃Sn and NbTi strands for ITER and 12 km of Nb₃Sn strands for HL-LHC (CERN) with the required characteristics have been successfully produced. The review of the characteristics of the different semiproducts (sheets, tubes, rods), made in Russia from the special grade niobium, and of the superconducting strands, manufactured with the use of them, is presented in the paper. The ways of the further improvement of the niobium ingots melting regimes and niobium sheets deformation and annealing regimes with the target of achieving RRR > 300 for the SRF cavities application are discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 857 EP - 859 KW - niobium KW - ECR KW - SRF KW - cavity KW - target DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-THP011 UR - http://jacow.org/srf2019/papers/thp011.pdf ER -