Interstrand resistance measurements on Nb/sub 3/Sn Rutherford-type cables

Devred, A.; Bacquart, L.; Brédy, P.; Bruzek, Christian-Éric; Laumond, Y.; Otmani, Rabie El; Schild, T.

doi:10.1109/77.783397

Cited by 16 publications

(17 citation statements)

References 14 publications

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“…Samples D and F, measured singularly, showed low values of R A (1.2 and 0.6 µΩ respectively) and higher values of R C (10 µΩ for sample D, and too high to be measured for sample F with a core). These values are of the same order of magnitude of those reported in [5] and [7], but Devred [5] found lower values of R C with respect to R A , in un-cored non-impregnated samples.…”

Section: Resultssupporting

confidence: 74%

“…Devred [5] reported a change of slope in the V-I curve due to the double barrier (Nb and Ta) of the strands he tested, because the Nb barrier contributed to the current transport below its critical field. The MJR strands we used have a single Nb barrier partially reacted.…”

Section: Resultsmentioning

confidence: 99%

“…At present measurements of ICR are performed in several laboratories using the electric method [4][5][6] or the calorimetric method [7], both well described in [8]. Measurements on Nb 3 Sn samples have been performed at CEA-Saclay [5] and at Twente University in collaboration with Ohio State University [7].…”

Section: Introductionmentioning

confidence: 99%

“…Measurements on Nb 3 Sn samples have been performed at CEA-Saclay [5] and at Twente University in collaboration with Ohio State University [7]. We decided to use the electric method (adapting an existing apparatus) and to focus our attention on testing both coil samples and cable stacks.…”

Section: Introductionmentioning

confidence: 99%

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Measurement of Inter-Strand Contact Resistance in Epoxy Impregnated Nb3Sn Rutherford Cables

Ambrosio¹,

Barzi²,

Chichili³

et al. 2004

AIP Conference Proceedings

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An apparatus for the measurement, under transverse pressure, of the inter-strand contact resistance in epoxy-impregnated Nb 3 Sn Rutherford cables has been recently assembled at Fermilab. Procedures have been developed to instrument and measure samples extracted from Nb 3 Sn coils. Samples were extracted from coils fabricated with the Wind-and-React and the React-and-Wind technology, both presently under development at Fermilab. A ceramic binder is used to improve the insulation and to simplify the fabrication of coils using the Wind-and-React technology. Synthetic oil is used to prevent sintering during the heat treatment of coils to be wound after reaction. In order to evaluate the effects of the ceramic binder and of the synthetic oil on the inter-strand resistance, measurements of samples extracted from coils were compared with measurements of cable stacks with varying characteristics. In this paper we describe the apparatus, the sample preparation, the measurement procedure, and the results of the first series of tests.

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Section: Resultssupporting

confidence: 74%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Measurement of Inter-Strand Contact Resistance in Epoxy Impregnated Nb3Sn Rutherford Cables

Ambrosio¹,

Barzi²,

Chichili³

et al. 2004

AIP Conference Proceedings

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“…Thus to constrain M coup both R c and N 3 R a /20 should be as large as possible (but not too high in the interest of cable stability). For the NbTi LHC cable recommended values of R c were 15 ± 5 µΩ [4] and 20 ± 10 µΩ [5]; accordingly for the adjacent-strand resistance the prefactor N 3 /20 (≈ 1,000 for the LHC-inner) allows R a to be as small as 0.2 µΩ (cf. [6]) which ensures current-sharing while not degrading R c .…”

Section: Coupling Magnetizationmentioning

confidence: 99%

Magnetic measurement of interstrand contact resistance and persistent-current magnetization of Nb3Sn Rutherford cables with cores of MgO tape and woven S-glass ribbon

Collings¹,

Sumption²,

Susner³

et al. 2012

AIP Conference Proceedings

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Rutherford cables exhibit two classes of parasitic magnetization both of which can distort the bore-field of an accelerator magnet: (1) a static magnetization ("hysteretic") resulting from intrastrand persistent currents, and (2) a dynamic magnetization produced by interstrand coupling currents passing through interstrand contact resistances (ICR) during field ramping. Interstrand coupling can be controlled by a core placed between the layers of the cable. Stainless steel ribbon (with its associated native oxide coating) is a frequently used core. Recently, however, MgO-paper tapes and woven s-glass ribbons have been suggested as alternative core materials in the interests of improved flexibility and compatibility with the cabling process. Interstrand contact resistances can be extracted from the results of AC loss measurement. Accordingly pickup-coil magnetization measurements of AC loss have been carried out on a group of cables with paper and ribbon cores. This paper reports on the resulting ICR results which it compares to those from uncored and stainless-steel-cored cables; it concludes by comparing the LHC-ramp-rate induced coupling magnetization of a typical cored Nb 3 Sn Rutherford cable with its transport-current-moderated persistent-current magnetizations at low and high fields.

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Interstrand resistances in cored Rutherford-type superconducting cables

Soika

Ghosh

2005

Cryogenics

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Interstrand resistance measurements on Nb/sub 3/Sn Rutherford-type cables

Cited by 16 publications

References 14 publications

Measurement of Inter-Strand Contact Resistance in Epoxy Impregnated Nb3Sn Rutherford Cables

Measurement of Inter-Strand Contact Resistance in Epoxy Impregnated Nb3Sn Rutherford Cables

Magnetic measurement of interstrand contact resistance and persistent-current magnetization of Nb3Sn Rutherford cables with cores of MgO tape and woven S-glass ribbon

Interstrand resistances in cored Rutherford-type superconducting cables

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