Zobrazeno 1 - 10
of 117
pro vyhledávání: '"K. Kwasnitza"'
Publikováno v:
Superconductor Science and Technology. 17:532-536
The contribution of the Ag surface layer to the ac losses in Bi, Pb(2223) tapes was studied. The ac losses at 77 K were measured for four different tapes either twisted or untwisted and having either a pure Ag sheath or a BaZrO3 insulating barrier. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5238b2029c175997083f8aae8ed10efe
https://doi.org/10.1088/0953-2048/17/3/038
https://doi.org/10.1088/0953-2048/17/3/038
Publikováno v:
Physica C: Superconductivity. 384:334-344
We have fabricated prototype Bi,Pb(2223)/Ag superconduting multifilamentary wires with a square cross-section. The AC losses of these wires were measured, compared with those of tapes and also compared with the theory. Wires show largely reduced AC m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::feca7ed3461c2fb98745434e792b583c
https://doi.org/10.1016/s0921-4534(02)01968-8
https://doi.org/10.1016/s0921-4534(02)01968-8
Autor:
Marc Dhalle, K. Kwasnitza, René Flükiger, G. Witz, C. Beneduce, Enrico Giannini, R. Passerini, X.D. Su
Publikováno v:
Physica C: Superconductivity. :1814-1817
The level of AC losses is still too high in Bi,Pb(2223) tapes to allow their use in many applications. Therefore the reduction of AC losses in Bi,Pb(2223) is a key factor for their economical viability. The reduction of AC losses can be achieved by t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9991c135cf20973d7e9e83893c358593
https://doi.org/10.1016/s0921-4534(02)01133-4
https://doi.org/10.1016/s0921-4534(02)01133-4
Publikováno v:
Superconductor Science and Technology. 15:1184-1189
Square and round wires have been fabricated by using a combination of two-axial rolling and drawing in order to reduce the effect of field anisotropy and to confirm the decrease of ac losses predicted by calculation. Critical current measurements, as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71e8a688b3670236ba91460f62cbe761
https://doi.org/10.1088/0953-2048/15/8/302
https://doi.org/10.1088/0953-2048/15/8/302
Publikováno v:
Physica C: Superconductivity. 355:325-334
On four untwisted multifilament Bi(2223)/Ag tapes with about the same cross-section area but different aspect ratios we have investigated in detail at 77 K the geometry dependence of the magnetic field losses for perpendicular Δ B over a larger fiel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c69a5841bf127c28ae930fa66b9bcdd
https://doi.org/10.1016/s0921-4534(01)00085-5
https://doi.org/10.1016/s0921-4534(01)00085-5
Publikováno v:
Cryogenics. 39:829-841
Flat High-Tc multifilament tapes with an Ag matrix have very large coupling current losses in perpendicularly applied 50 Hz magnetic fields. By the application of ceramic isolating BaZrO3- and SrZrO3 barriers around the filaments we could reduce at 7
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70d27c8cac78e7194eece9ccb527ae2c
https://doi.org/10.1016/s0011-2275(99)00113-7
https://doi.org/10.1016/s0011-2275(99)00113-7
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 9:1173-1176
The transverse electrical resistivity in multifilamentary Ag/Bi, Pb(2223) tapes is considerably enhanced after introducing inert oxide barriers, a new concept in which each single filament is surrounded by a highly resistive BaZrO/sub 3/ layer of 100
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93f002f178394819f69a555d2f3a36d3
https://doi.org/10.1109/77.783508
https://doi.org/10.1109/77.783508
Autor:
K. Kwasnitza, St. Clerc
Publikováno v:
Cryogenics. 38:305-308
It is known, that the coupling current losses in cable-in-conduit superconductors can be reduced by a Cr surface coating of the multifilament wires of the cable. Here we have measured for the first time, how a double layer of crystalline Cr and {\em
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67e2ab733f8754b7e3b39f01d2204ba5
https://doi.org/10.1016/s0011-2275(97)00161-6
https://doi.org/10.1016/s0011-2275(97)00161-6
Autor:
René-Louis Flukiger, Yibing Huang, Eric Walker, K. Kwasnitza, Marc Dhalle, Albino Polcari, St. Clerc, R. Passerini, Frank Marti, G. Witz, Enrico Giannini
Publikováno v:
Journal of Superconductivity: Incorporating Novel Magnetism. 11:495-505
A significant reduction of ac losses in twisted Bi(2223) multifilamentary tapes with Ag sheaths has been achieved by using oxide (BaZrO3 and SrZrO3) barriers between filaments. These barriers have two important effects: they increase the transverse r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b575e08be71f52bf839f2b1ebe718bb4
https://doi.org/10.1023/a:1022662607835
https://doi.org/10.1023/a:1022662607835
Publikováno v:
Cryogenics. 36:27-34
In this paper we present a.c. loss investigations performed on a 10 kA prototype cable-in-conduit superconductor with a NbTi basis. The twisted and braided conductor was under development for a superconducting 180 MJ energy storage model coil with B
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd49ee47ec1612fcfc54e2f110a6501c
https://doi.org/10.1016/0011-2275(96)80766-1
https://doi.org/10.1016/0011-2275(96)80766-1