Diameter Quality Control of Nb <sub>3</sub>Sn Wires for MQXF Cables in the USA [electronic resource]
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Full Text (via OSTI) |
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| Format: | Electronic eBook |
| Language: | English |
| Published: |
Berkeley, Calif. : Oak Ridge, Tenn. :
Lawrence Berkeley National Laboratory ; Distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
2019.
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| Subjects: |
| Abstract: | During this project, the 0.850 మ003 mm Nb<sub>3</sub>Sn wires for the low-beta quadrupole magnets 'MQXFA' procured for the U.S. LHC Accelerator R&D 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. |
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| Item Description: | Published through Scitech Connect. 04/09/2019. "Journal ID: ISSN 1051-8223" "Other: ark:/13030/qt56v8s1kh" Pong, Ian ; Cooley, Lance D. ; Lin, Andy ; Higley, Hugh C. ; Sanabria, Charlie ; USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25) National Science Foundation (NSF) |
| Physical Description: | Size: Article No. 6001505 : digital, PDF file. |