A new symmetrical arrangement of tape-shaped multifilaments for Bi-2212/Ag round-shaped wire

Okada, Minoru; Tanaka, Kazuhide; Wakuda, T.; Ohata, K.; Sato, Junichi; Kumakura, Hiroaki; Toko, Kiyoshi; Kitaguchi, Hitoshi; Togano, K.; Wada, Hitoshi

doi:10.1109/77.784831

Cited by 24 publications

(11 citation statements)

References 5 publications

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“…In case of the ROSATwire, the circumstances differ. Because of the high symmetry of this wire, there exists only a weak angular dependence of its critical current [6], [8].…”

Section: Investigated Types Of Bi-hts Wiresmentioning

confidence: 98%

“…The second type of investigated superconducter is a Bi-2212 round-shaped wire, named ROSATwire ( m t a t i o n &mmetric Arranged Tape-in-tube &) , manufactured byHitachi. The ROSATwire is built up of several stacks of Ag-sheathed multifilamentary Bi-2212 tapes arranged in triple rotation symmetry in a Ag or Ag-alloy sheath[6], Further information on the wires can be found inTable 1.171, PI.I v . CRITICAL CURRENT OF %PLY W I R E AND RO S AT WIRE…”

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confidence: 99%

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Investigation of Bi-HTS wires for high field insert coils

Hornung

Rimikis

Kimmich

et al. 2001

IEEE Trans. Appl. Supercond.

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In the High Magnetic Field Laboratory of the Institute for Technical Physics, the test facility HOMER I1 is currently under construction. In a first step, a magnetic field of 20 T in a bore of 180 mm produced by advanced LTS materials is aspired. In a second step, insert coils built of HTS wires are planned to be added in order to obtain resulting fields up to 25 T. With these intentions in background, the superconducting properties of different Bi-HTS wires were investigated in a bath cooled superconducting magnet system at 4.2 K and magnetic fields up to 10 T. The critical current I , was examined resistively using a high resolution four-point measurement technique. In consideration of the determined current carrying capacity of the wires, two layouts for HTS insert coils are presented.

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“…In case of the ROSATwire, the circumstances differ. Because of the high symmetry of this wire, there exists only a weak angular dependence of its critical current [6], [8].…”

Section: Investigated Types Of Bi-hts Wiresmentioning

confidence: 98%

mentioning

confidence: 99%

Investigation of Bi-HTS wires for high field insert coils

Hornung

Rimikis

Kimmich

et al. 2001

IEEE Trans. Appl. Supercond.

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“…Four stacks (each with square cross sections) of narrow tapes are assembled; each stack is rotated by 90 with respect the others (see figure 22). The disposition of the tapes in the stack is very similar to the filament dispositions in ROSAT Bi2212 wires [155] that were manufactured at the end of the 90's. Around the stacks there are four circular sectors, which can be made of copper or aluminium.…”

Section: North China Electric Power University Twisted-stack Conductormentioning

confidence: 76%

A review of commercial high temperature superconducting materials for large magnets: from wires and tapes to cables and conductors

Uglietti

2019

Supercond. Sci. Technol.

196

123

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High Temperature Superconducting (HTS) materials have the potential to generate magnetic field beyond the level obtainable with Low Temperature Superconducting (LTS). This review reports the past and present R&D on HTS cables and conductors for high field tokamaks, accelerator dipoles and large solenoids. Among the HTS wires and tapes available commercially, coated conductor tapes are the most appealing because of the outstanding critical strength and large improvement margin. Limitations are the weakness against peeling and shearing and the short piece length. The prices for technical superconductors are reviewed because they play an important role in large projects; moreover the perspective of industrial production of HTS wires and tapes is discussed considering the historical development of the LTS wire market. Various designs have been proposed for HTS cables and conductors: some are better suited for soft materials, while others can exploit the anisotropy of coated conductors (by aligning the tape with the field), providing the highest current density. The last decade has seen an increase in the size and complexity of the prototypes; however some peculiar features of HTS, such as high stability margin and high mechanical limits, have not yet been fully incorporated in the designs: for example the transposition requirements for HTS have not yet been studied in detail. Several facts indicate that tapes (even if anisotropic) can be used for manufacturing cables and magnets of any size and have advantages with respect to round wires.

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“…28,29 In order to obtain round wires with the textured superconducting phase inside, a variation of the PIT process called the ROSAT (rotation symmetrically arranged tape-in-tube) method was developed by Hitachi by assembling anisotropic textured flat tapes to form round multifilamentary Bi-2212 wires containing rotationally triple-symmetric groups of tape-shaped superconducting filaments. 30,31 In addition to the improved transport properties, the ROSAT wires exhibit a lower anisotropy of J c in various field orientations, which is preferable for magnet design. For Bi-2223 materials, in order to reduce the effect of anisotropy on the transport properties, the tape-in-tube process, which is also called the tape-inrectangular tube (TIRT) process, was developed to fabricate multifilamentary Bi-2223/Ag wires and tapes.…”

Section: Introductionmentioning

confidence: 99%

Interface effects on the current transport properties of multi-layered (Ba, K)Fe₂As₂ superconducting wires

Yao¹,

Guo²,

Zhu³

et al. 2023

J. Mater. Chem. C

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A new symmetrical arrangement of tape-shaped multifilaments for Bi-2212/Ag round-shaped wire

Cited by 24 publications

References 5 publications

Investigation of Bi-HTS wires for high field insert coils

Investigation of Bi-HTS wires for high field insert coils

A review of commercial high temperature superconducting materials for large magnets: from wires and tapes to cables and conductors

Interface effects on the current transport properties of multi-layered (Ba, K)Fe₂As₂ superconducting wires

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A new symmetrical arrangement of tape-shaped multifilaments for Bi-2212/Ag round-shaped wire

Cited by 24 publications

References 5 publications

Investigation of Bi-HTS wires for high field insert coils

Investigation of Bi-HTS wires for high field insert coils

A review of commercial high temperature superconducting materials for large magnets: from wires and tapes to cables and conductors

Interface effects on the current transport properties of multi-layered (Ba, K)Fe2As2 superconducting wires

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Interface effects on the current transport properties of multi-layered (Ba, K)Fe₂As₂ superconducting wires