caa a22 4500 445381132 CHVBK 20180317143017.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-1020-5 doi (NATIONALLICENCE)springer-10.1007/s10948-010-1020-5 New Type of Non-magnetically Sheathed MgB2 Wires—First Sight to AC Losses with Numerical Simulations [Elektronische Daten] [L. Rostila, S. Brisigotti, G. Grasso] AC losses of MgB2 wires can be substantially decreased with nonmagnetic sheath materials and multifilament structure. In this paper, AC losses of two low loss samples are computed in AC-AC domain, which means that the samples were exposed to alternating transport current and field simultaneously. The losses were computed with modified Brandt's method, which takes J c(B)-dependence into account, and for these computations, the superconductors' cross-section is determined directly from photographs. The losses were computed in wide magnetic field range with various transport currents. The results suggest that the AC losses of these samples are relatively low because large magnetization current loops are not formed. Additional simulations show that below the penetration field, the losses can be approximated using constant critical current density based on the self-field critical current of the sample. However, after the penetration field, this leads to too high loss values. Finally, the results are compared to analytical loss formulas in case of sole transport current and sole magnetizing field. Springer Science+Business Media, LLC, 2010 Superconductor nationallicence Magnesiumdiboride nationallicence AC loss nationallicence Rostila L. Columbus Superconductors S.p.A., Via delle Terre Rosse 30, 16133, Genova, Italy aut Brisigotti S. Columbus Superconductors S.p.A., Via delle Terre Rosse 30, 16133, Genova, Italy aut Grasso G. Columbus Superconductors S.p.A., Via delle Terre Rosse 30, 16133, Genova, Italy aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 313-317 1557-1939 24:1-2<313 2011 24 10948 https://doi.org/10.1007/s10948-010-1020-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-1020-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rostila L. Columbus Superconductors S.p.A., Via delle Terre Rosse 30, 16133, Genova, Italy aut NATIONALLICENCE 700 1- Brisigotti S. Columbus Superconductors S.p.A., Via delle Terre Rosse 30, 16133, Genova, Italy aut NATIONALLICENCE 700 1- Grasso G. Columbus Superconductors S.p.A., Via delle Terre Rosse 30, 16133, Genova, Italy aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 313-317 1557-1939 24:1-2<313 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer