50 tesla superconducting solenoid for fast muon cooling ring

Mclnturff, A. D.; Mclntyre, P.; Sattarov, Akhdiyor

doi:10.1109/pac.2007.4440888

Cited by 4 publications

(2 citation statements)

References 7 publications

(6 reference statements)

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“…However, the LHC represents perhaps the limit of Nb-Ti based magnets, and extending into the energy frontier requires the use of Nb 3 Sn or other materials and other magnet designs [5,7]. In this new era, R&D programmes have produced steady improvement in conductor performance [8,9] and the maximum field attained in model coils [10][11][12] over time, meaning that the cost-to-performance ratio of the superconductor is presently decreasing (i.e. improving) with the pace of development.…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

Costs of high-field superconducting strands for particle accelerator magnets

Cooley

Ghosh

Scanlan

2005

Supercond. Sci. Technol.

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“…Fitting the experiment into this bore might be quite challenging. However, magnets with a bore of 20 cm and a field of 35 T have been designed[53].…”

mentioning

confidence: 99%