Progress in second-generation HTS wire development and manufacturing

Selvamanickam, V.; Chen, Y.; Xiong, X.; Xie, Yiyuan; Zhang, X.; Rar, A.; Martchevskii, Maxim; Schmidt, Robert M.; Lenseth, K.; Herrin, J. L.

doi:10.1016/j.physc.2008.05.063

Cited by 70 publications

(41 citation statements)

References 6 publications

(10 reference statements)

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“…A lot of works have been carried out over past decade to develop long-length HTS REB 2 C 3 O 7Àd (REBCO; RE = Y, Nd, Sm, Gd, Ho, etc.) CCs carried high transport current [1][2][3][4][5][6][7]. HTS-CCs are attracting much attention for practical applications of superconducting electrical and magnetic devices that can operate in liquid nitrogen temperature.…”

Section: Introductionmentioning

confidence: 99%

“…HTS-CCs are attracting much attention for practical applications of superconducting electrical and magnetic devices that can operate in liquid nitrogen temperature. Drastic improvements in the length and the current carrying capability of HTS-CC have been accomplished for last several years [2][3][4][5][6][7]. The issues in this field is shifting to securing uniformity and reproducibility of the manufacturing processes, improving flux pinning properties (in-field current carrying properties) [8][9][10][11][12][13] and reducing ac (alternate current) losses [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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The comparative study of magnetic properties for YBCO coated conductors based on RABiTS and IBAD templates

Song

Kang

Kim

et al. 2010

Physica C: Superconductivity and its Applications

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The comparative study of magnetic properties for YBCO coated conductors based on RABiTS and IBAD templates

Song

Kang

Kim

et al. 2010

Physica C: Superconductivity and its Applications

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“…The conductor (SCS4050) is manufactured by SPI [15]. The bare tape is 4.0 mm wide and 0.095 mm thick.…”

Section: Ybco Tape Conductormentioning

confidence: 99%

Measurements on Subscale Y-Ba-Cu-O Racetrack Coils at 77 K and Self-Field

Wang

Caspi

Cheng

et al. 2010

IEEE Trans. Appl. Supercond.

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Abstract-YBa2Cu3O 7−δ (YBCO) tapes carry significant amount of current at fields beyond the limit of Nb-based conductors. This makes the YBCO tapes a possible conductor candidate for insert magnets to increase the bore field of Nb3Sn highfield dipoles. As an initial step of the YBCO insert technology development, two subscale racetrack coils were wound using Kapton-insulated commercial YBCO tapes. Both coils had two layers; one had 3 turns in each layer and the other 10 turns. The coils were supported by G10 side rails and waxed strips and not impregnated. The critical current of the coils was measured at 77 K and self-field. A 2D model considering the magneticfield dependence of the critical current was used to estimate the expected critical current. The measured results show that both coils reached 80%-95% of the expected values, indicating the feasibility of the design concept and fabrication process.

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“…[1][2][3][4][5] These CCs are promising for superconducting magnet applications because of their high I c density, low dependency of the I c on the external magnetic field, good mechanical properties and reasonable cost, which offer opportunities to develop ultra-high-field magnets. [6][7][8] Unfortunately, these CCs have not been used in superconducting devices with persistent current mode (PCM) operation such as magnets for magnetic resonance applications owing to the unavailability of fabrication techniques for proper joining and contacts.…”

Section: Introductionmentioning

confidence: 99%

A superconducting joint for GdBa2Cu3O7−δ-coated conductors

et al. 2014

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Second-generation (2G) GdBCO-coated conductors (CCs) are promising for superconducting magnet applications because of their high critical current (I c ) density, low dependency of the I c on the external magnetic field, good mechanical properties and reasonable cost, which offer opportunities to develop ultra-high-field magnets. However, they have not been used in hightemperature superconducting (HTS) applications with persistent current mode (PCM) operation such as nuclear magnetic resonance/magnetic resonance imaging magnets owing to unavailability of fabrication techniques for proper joining and contacts. Here we report a resistance-free joint, termed a 'superconducting joint', for 2G GdBCO CCs that forms a direct connection to establish a superconducting closed loop for PCM operation. The I c value of the joined CCs is identical to that of the parent conductors in a liquid nitrogen bath (77 K). Moreover, the initially induced magnetic field of a model GdBCO coil containing a superconducting joint is maintained without decreasing, indicating the complete absence of electrical resistance. Thus, this fabrication method is a unique practical solution for lengthening the 2G HTS CCs and, more importantly, achieving PCM operation in 2G HTS magnet applications, including ultra-high-field nuclear magnetic resonance/magnetic resonance imaging magnets generating more than 1 GHz.

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Progress in second-generation HTS wire development and manufacturing

Cited by 70 publications

References 6 publications

The comparative study of magnetic properties for YBCO coated conductors based on RABiTS and IBAD templates

The comparative study of magnetic properties for YBCO coated conductors based on RABiTS and IBAD templates

Measurements on Subscale Y-Ba-Cu-O Racetrack Coils at 77 K and Self-Field

A superconducting joint for GdBa2Cu3O7−δ-coated conductors

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