Wire specification_20230808.docx
DOCX document 14 KB Posted
- Solicitation number
- RFP346241
About this file
This document outlines specifications for Nb3Sn superconducting wires with artificial pinning centers. The specifications require Nb alloy tubes with composition of either Nb-7.5wt.%Ta-2wt.%Hf or Nb-7.5wt.%Ta-1wt.%Zr, deviation limits on component percentages, proper annealing of the tubes, optimized powder component percentages to fully react the filaments, 61-filament or 217-filament wire arrays with a specified Cu to non-Cu ratio limit, drawing the wires to diameters between 0.5-1.0 mm with filament sizes smaller than 70 micron, and delivery of the final wires to Fermilab. Related is a federal contract opportunity from the Department of Energy's Fermi National Accelerator Laboratory seeking proposals to fabricate the specified Nb3Sn superconducting wires.
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Other files
| File | Type | Posted |
|---|---|---|
| RFP 346241.pdf | ||
| PUR-466_Proposal Certifications.pdf | ||
| SARC_Subcontractor Annual RepsCerts Rev 3.pdf | ||
| Terms and Conditions.pdf |
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Specifications for the wires to be fabricated
The Nb3Sn wires will be fabricated based on the “Artificial Pinning Center” (APC) technique.
The details of the specifications of the wires are listed below:
1) The wires use an Nb alloy tube with the composition of Nb-7.5wt.%Ta-2wt.%Hf or Nb-7.5wt.%Ta-1wt.%Zr, with the deviation of the Ta percentage no more than 1 wt.% and the deviation of the Hf or Zr percentage no more than 0.3 wt.%. The Nb-7.5wt.%Ta-2wt.%Hf or Nb-7.5wt.%Ta-1wt.%Zr tubes must be properly annealed, with initial hardness below 100 HV.
2) The wires must have proper percentages of Sn, Cu, SnO2 in the powders, so that the filaments are fully reacted.
3) The wires have a 61-filament or 217-filament array, with the Cu/non-Cu ratio no more than 1.5.
4) The wires are drawn to diameters of 0.5-1.0 mm, with filament size smaller than 70 micron.
All the final wires are to be delivered to Fermilab.
Xingchen Xu (33444N) Phone: 630-840-8388 Email: xxu@fnal.gov
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