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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:59 |
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Conference: Bucharest University Faculty of Physics 2017 Meeting
Section: Solid State Physics and Materials Science
Title:
EFFECT OF PROTON IRRADIATION ON THE SUPERCONDUCTING PROPERTIES OF SPS SINTERED MGB2
Authors:
Eliza NANAU (1), Viorel SANDU (2), Liviu CRACIUN (3), Gheorghe V. ALDICA (2), Alina IONESCU (2)
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Affiliation:
1) Physics, Faculty, University of Bucharest, Romania
2) National Institute of Materials Physics, Magurele, Romania
3) ”Horia Hulubei” national Institute of Nuclear Physics and Engineering, Magurele, Romania
E-mail
enelizza@gmail.com
Keywords:
MgB2, superconductivity, proton irradiation, pinning, critical currents
Abstract:
A series of sintered superconducting MgB2 samples were submitted to proton fluxes of energy between 8.6 and 13. 2 MeV and fluences in the range 2 1016-30 1016 protons cm-2 in a Cyclotron TR 19 accelerator. The variation of the critical temperature is only Delta(Tc) = -0.6 K, but more important effects are noticeable on the critical current density which shows a substantial improvement, mainly at high applied fields. The field dependence of the pinning energy, as obtained from relaxation measurements, is also presented. As a drawback of the irradiation, the flux jumps extend up to temperatures higher than 20 K.
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