Control of contact resistance by strand surface coating in 36-strands NbTi CICC's

Arend Nijhuis; Herman H.J. ten Kate; Jean-Luc Duchateau; Patrick Decool

doi:10.1016/S0011-2275(01)00037-6

Control of contact resistance by strand surface coating in 36-strands NbTi CICC's

Arend Nijhuis, Herman H.J. ten Kate, Jean-Luc Duchateau, Patrick Decool

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Abstract

The stability and AC loss of NbTi cable-in-conduit conductors (CICCs) is largely determined by the interstrand contact resistance (Rc). Rc is predominantly established by the strand surface properties. Five 36-strand CICCs, fully identical except for the plating of the strand surface or the presence of an internal CuNi shell, are prepared and tested. Beside strands with bare copper surface, chromium, nickel and oxidised stabrite (Sn95Ag5) coatings are applied. The effect of an epoxy curing heat treatment (HT) and electromagnetic loading on Rc is simulated and measured. Applying different strand coatings in NbTi CICCs, offers a broad range in Rc, from 7 to 430 nΩ m, while the interstrand nτ's vary between 64 and 2 ms.

Original language	Undefined
Pages (from-to)	1-7
Number of pages	7
Journal	Cryogenics
Volume	41
Issue number	1
DOIs	https://doi.org/10.1016/S0011-2275(01)00037-6
Publication status	Published - 2001

Keywords

Interstrand contact resistance
IR-74596
Cable-in-conduit
Coatings
NbTi superconducting cables
Coupling loss
METIS-200559

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10.1016/S0011-2275(01)00037-6

Cite this

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title = "Control of contact resistance by strand surface coating in 36-strands NbTi CICC's",

abstract = "The stability and AC loss of NbTi cable-in-conduit conductors (CICCs) is largely determined by the interstrand contact resistance (Rc). Rc is predominantly established by the strand surface properties. Five 36-strand CICCs, fully identical except for the plating of the strand surface or the presence of an internal CuNi shell, are prepared and tested. Beside strands with bare copper surface, chromium, nickel and oxidised stabrite (Sn95Ag5) coatings are applied. The effect of an epoxy curing heat treatment (HT) and electromagnetic loading on Rc is simulated and measured. Applying different strand coatings in NbTi CICCs, offers a broad range in Rc, from 7 to 430 nΩ m, while the interstrand nτ's vary between 64 and 2 ms.",

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T1 - Control of contact resistance by strand surface coating in 36-strands NbTi CICC's

AU - Nijhuis, Arend

AU - ten Kate, Herman H.J.

AU - Duchateau, Jean-Luc

AU - Decool, Patrick

PY - 2001

Y1 - 2001

N2 - The stability and AC loss of NbTi cable-in-conduit conductors (CICCs) is largely determined by the interstrand contact resistance (Rc). Rc is predominantly established by the strand surface properties. Five 36-strand CICCs, fully identical except for the plating of the strand surface or the presence of an internal CuNi shell, are prepared and tested. Beside strands with bare copper surface, chromium, nickel and oxidised stabrite (Sn95Ag5) coatings are applied. The effect of an epoxy curing heat treatment (HT) and electromagnetic loading on Rc is simulated and measured. Applying different strand coatings in NbTi CICCs, offers a broad range in Rc, from 7 to 430 nΩ m, while the interstrand nτ's vary between 64 and 2 ms.

AB - The stability and AC loss of NbTi cable-in-conduit conductors (CICCs) is largely determined by the interstrand contact resistance (Rc). Rc is predominantly established by the strand surface properties. Five 36-strand CICCs, fully identical except for the plating of the strand surface or the presence of an internal CuNi shell, are prepared and tested. Beside strands with bare copper surface, chromium, nickel and oxidised stabrite (Sn95Ag5) coatings are applied. The effect of an epoxy curing heat treatment (HT) and electromagnetic loading on Rc is simulated and measured. Applying different strand coatings in NbTi CICCs, offers a broad range in Rc, from 7 to 430 nΩ m, while the interstrand nτ's vary between 64 and 2 ms.

KW - Interstrand contact resistance

KW - IR-74596

KW - Cable-in-conduit

KW - Coatings

KW - NbTi superconducting cables

KW - Coupling loss

KW - METIS-200559

U2 - 10.1016/S0011-2275(01)00037-6

DO - 10.1016/S0011-2275(01)00037-6

M3 - Article

SN - 0011-2275

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SP - 1

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JO - Cryogenics

JF - Cryogenics

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