I&amp;lt;inf&amp;gt;c&amp;lt;/inf&amp;gt;(H,T) measurements for multi-kiloampere superconducting magnet conductor

McInturff, A.D.; Lundy, R.; Remsbottom, R.; Wake, M.

doi:10.1109/tmag.1985.1063808

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…Other key components, such as alloy homogeneity, heat treatment schedules, and strand design, were chosen by industry according to laboratory specifications for performance, copper area, and so forth. As table 1 shows, Prior to about 1986, magnet strands for the Tevatron at Fermi National Accelerator Laboratory (FNAL) [24,25], the proposed Colliding Beam Accelerator (CBA) at Brookhaven National Laboratory (BNL) [26], and the High Energy Relativistic Accelerator (HERA) in Europe [27] were manufactured from a different process, using a 'kit' to make a single multifilamentary billet extrusion. The kit included hexagonal copper tubes, Nb47Ti rods, and a copper can.…”

Section: Costs Of Accelerator Magnet Strands and Cables 1980 To Presentmentioning

confidence: 99%

Costs of high-field superconducting strands for particle accelerator magnets

Cooley

Ghosh

Scanlan

2005

Supercond. Sci. Technol.

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The costs of superconducting magnet strands are compared by calculating a ‘production scaling factor’ P that relates purchase data to the cost of raw materials. Using a consistent method, we normalize for different conductor geometries and strand diameters to arrive at cost indices in $ kg−1, $ m−1, and $ kA−1 m−1. Analyses of Nb47Ti conductors taken from the past 25 years of high-field magnet projects reveal that the price of raw materials and, to a lesser extent, finished strands, have tracked the price of niobium pentoxide. Performance gains during the 1980s produced $ kA−1 m−1 indices that fell with time ahead of strand cost in $ m−1, a situation that may reflect the present status of Nb3Sn magnet conductors. Analyses of present materials show that P decreases systematically with billet mass. While production strands in 200–500 kg billets have costs times the cost of raw materials, the 20–50 kg billet size for internal-tin Nb3Sn composites drives P up to 8–10. Thus, in contrast to LHC-type Nb47Ti strands that cost $150 kg−1, $0.60 m−1, and $1.00 kA−1 m−1 at 5 T, 4.2 K, Nb3Sn strands required for the next generation of accelerator magnets are $1000 kg−1, $4.00 m−1, and >$5.75 kA−1 m−1 at 12 T, 4.2 K (where Jc is comparable to that for Nb47Ti at 5 T, 4.2 K). This high cost might be reduced by a factor of if a large-scale internal-tin or powder-in-tube Nb3Sn process can be found. Replacing expensive components with functionally equivalent but cheaper materials can produce 20% changes in $ kg−1 and $ m−1, but this might come at a performance penalty and no net savings in $ kA−1 m−1. Removing stabilizer from the strand cross-section and replacing it elsewhere in the cable can reduce the cost for a given length of cable significantly, but only if the processing cost for the strand remains unchanged after reduction of the stabilizer area. Emerging powder-in-tube composites show promise: Nb3Sn strands could reach $6 kA−1 m−1 at 12 T, 4.2 K, while Bi-2212 strands could fall below $10 m−1. MgB2 superconducting strands could have very low raw materials cost at $0.20 m−1, which translates to $1.00 m−1 for finished strands and at 2 T, 4.2 K based on published data.

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Section: Costs Of Accelerator Magnet Strands and Cables 1980 To Presentmentioning

confidence: 99%

Costs of high-field superconducting strands for particle accelerator magnets

Cooley

Ghosh

Scanlan

2005

Supercond. Sci. Technol.

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Superconducting Transformer for Superconducting Cable Testing up to 45 kA

Lü

2020

IEEE Trans. Appl. Supercond.

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A facility capable of testing superconducting cables with current of tens of kA is essential for the development of large superconducting magnets. A superconducting transformer (SCT) is a suitable choice as a high DC current source for testing superconducting cables. In this work, we will present our experimental results of a SCT up to output current of 45 kA. The properties of this SCT is characterized at 4.2 K. Its behaviors during quenches at different current levels are studied.

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I<inf>c</inf>(H,T) measurements for multi-kiloampere superconducting magnet conductor

Cited by 2 publications

References 3 publications

Costs of high-field superconducting strands for particle accelerator magnets

Costs of high-field superconducting strands for particle accelerator magnets

Superconducting Transformer for Superconducting Cable Testing up to 45 kA

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