Bi-System Oxide Superconducting Tapes Based on Silver-Alloy for Power Current Leads

Sasaoka, Takaaki; Nomura, Katsumi; Sato, Junichi; Seido, Masahiro; Kumakura, H.; Togano, K.; Maeda, H.; Shimoyama, Jun–ichi; Fujishiro, Hiroyuki; Ikebe, Manabu; Noto, S.

doi:10.1007/978-4-431-68305-6_165

Cited by 3 publications

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“…The PCS of the Bi-2212 magnet was developed using a multifilamentary Bi-2212/Ag-Au tape prepared by the PI T method [29]. An Ag-Au alloy sheath was used to increase the resistivity of the tape at a normal conducting state [30]. A small persistent-current-mode magnet was fabricated using these superconducting joints and PCS [31].…”

Section: Experiments On a Persistent-current Mode Of Magnet Operationmentioning

confidence: 99%

Development of Bi-2212 conductors and magnets for high-magnetic-field generation

Kumakura¹

2000

Supercond. Sci. Technol.

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Bi-2212 is a very interesting superconductor from the point of view of high-magnetic-field generation because it has an extraordinarily high upper critical field. This paper reviews recent remarkable progress on Bi-2212/Ag superconductors and their applications to high-field magnets. Bi-2212/Ag multifilamentary and multilayer tape conductors with excellent performance in high fields were developed by the application of a powder-in-tube method and a coating method, respectively. High Jc values of (1.5-3) × 105 A cm-2 in a field of 30 T at 4.2 K were obtained for both multifilamentary and multilayer tapes. Pancake-type magnets were fabricated with these Bi-2212 tapes. The combination of Bi-2212 magnets and an 18 T conventional superconducting magnet generated a world record of 23.4 T at 4.2 K. A Bi-2212 magnet having a practical size of clear bore of 61 mm was also fabricated. This magnet generated 3 T in a backup field of 18 T at 4.2 K with a total field of 21 T. This 21 T magnet system has been operated many times since 28 September 1998, and the magnet system is now being used for experiments such as the Jc -B measurements of superconductors. These results clearly demonstrate that a Bi-2212 conductor is very promising for high-field applications. One of the interesting applications of a high-field superconducting magnet is a high-field NMR spectrometer. The electric field versus current density (E -J ) characteristics and the persistent-current mode of magnet operation are discussed in connection with the NMR.

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Section: Experiments On a Persistent-current Mode Of Magnet Operationmentioning

confidence: 99%