Réflexion N.C. Presentation 2012
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Presentation Transcript
Effect of neutron irradiation on HTS tapes properties M. Jirsa1, I. uran2, M. Rame 1, J. Ducho 1, T. Entler2, L. Viererbl3 1 Institute of Physics ASCR 2 Institute of Plasma Physics ASCR 3 Research Center e WP MAG final meeting 2019
Task specifications for 2019 1) Neutron irradiation experiments + magnetic measurements 2) SEM and TEM of the tapes, morphology and chemical analyses WP MAG final meeting 2019
SuperOx SuperOx 1000 (a) (b) 1000 100 Ic (A) Ic (A) 0 T 1 T 3 T 5 T 8.5 T 0 T 1 T 3 T 5 T 8.5 T 10 100 10 K 50 K 1 0 1 2 3 4 0 1 2 3 4 22 m -2) Fast neutron fluence (10 Fast neutron fluence (1022 m-2) SuperOx SuperOx 1,4 50 K 0 T 1 T 3 T 5 T 8.5 T 10 K 1,0 1,2 0,8 1,0 Ic/Ic(0) Ic/Ic(0) 0,6 0,8 0 T 1 T 3 T 5 T 8.5 T 0,4 0,6 (a) (b) 0,2 0,4 0 1 2 3 4 0 1 2 3 4 22 m -2) Fast neutron fluence (1022 m-2) Fast neutron fluence (10 WP MAG final meeting 2019
Neutron irradiation 2019 18 samples with 3 different irradiation histories were irradiated to the following fluence: Inside of Cd box Fluence (m-2) Neutrons Energy interval thermal (0.100 meV 0.550 eV) 3,95E+20 epithermal (0.550 eV 110.0 keV) 3,18E+21 fast (110.0 keV 20.0 MeV) 5,71E+21 fast ( 1.0 MeV 20.0 MeV) 2,86E+21 total 9,29E+21 WP MAG final meeting 2019
SuperOx-5 94 1000 93 irradiated 10 K 92 100 50 K pristine 91 Tc (K) 10 90 Ic (A) 89 1 88 Pristine 0.57 E22 fast 77 K 0,1 87 86 0,01 85 0 2 4 6 8 SCS4050APLZ SCS4050APHZ SuNAM C1 SuNAM A1 SuNAM B1 SCS4050 SCS4050AP SuperOx 0H (T) WP MAG final meeting 2019
Fast neutron fluence up to 4.02x1022m-2, E 0.1 MeV SuperOx 1000 10 K 100 50 K Ic (A) 10 1 pristine 0.75x1022 m-2 1.12x1022 m-2 2.9x1022 m-2 4.02x1022 m-2 77 K 0,1 0,01 0 1 2 3 4 5 6 7 8 9 0H (T) WP MAG final meeting 2019
Pristine SuperPower 4050 AP +7.5 mol% Zr WP MAG final meeting 2019
Conclusions: At temperatures below 30 K, Icat high magnetic fields grows with irradiation fluence but at a certain dose this tendency turns to a gradual Icdegradation. Anyway, at our highest fluence, about 4 1022m-2 of fast neutrons, Icat low temperatures and high magnetic fields remained close to the values of intact tapes (around 100-300 A at 14 T). The degradation was not severe. SEM/EDS analysis started. It confirmed the SuperPower 4050 tapes were Y-123, the SuperPower 4050 AP tapes were (Y+Gd)-123, and Sunam and SuperOx samples were Gd-123. TEM/EDX studies proved presence of ZrBaO3columnar structure in the SuperPower 4050 AP tapes with Zr. WP MAG final meeting 2019
Task for 2020 : 1) Continuation in neutron irradiation experiments 2) SEM and TEM tests WP MAG final meeting 2019
