Diameter Quality Control of Nb3Sn Wires for MQXF Cables in the USA
| Autor: | Charlie Sanabria, Lance D. Cooley, Andy Lin, Hugh Higley, I. Pong |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Large Hadron Collider Luminosity (scattering theory) business.industry Electrical engineering Condensed Matter Physics 01 natural sciences Standard deviation Electronic Optical and Magnetic Materials Cross section (physics) Upgrade Quality (physics) Mechanical stability 0103 physical sciences Electrical and Electronic Engineering 010306 general physics Quadrupole magnet business |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 29:1-5 |
| ISSN: | 2378-7074 1051-8223 |
| DOI: | 10.1109/tasc.2019.2909238 |
| Popis: | Author(s): Pong, I; Cooley, LD; Lin, A; Higley, HC; Sanabria, C | Abstract: The 0.850 ± 0.003 mm Nb3Sn wires for the low-beta quadrupole magnets 'MQXFA' procured for the U.S. LHC Accelerator RaD Program (LARP) and the U.S. High Luminosity LHC Accelerator Upgrade Project (US HL-LHC AUP, or simply AUP) are received at Lawrence Berkeley National Laboratory (LBNL). There, the wires are respooled and then fabricated into Rutherford cables for winding coils. As part of the quality control program, AUP obtains from the wire manufacturer values of the maximum, average, minimum, and standard deviation of the two orthogonal axes, which are assessed prior to shipment approval. At LBNL, a dual-axis optical micrometer is used to measure the wire diameter of each spool every ∼30 cm prior to cabling. This helps decide whether wire pieces with abnormal diameters should be distributed across the cable cross section, in order to improve cable parameter quality and mechanical stability consistency. This paper presents: 1) diameter data of LARP cables and of the first AUP cables made using wires acquired under LARP; 2) our deviation acceptance/rejection justification; and 3) the impact of wire diameter statistics on cable fabrication. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|