KIT | KIT-Bibliothek | Impressum | Datenschutz

Effect of transverse compressive stress applied at room temperature on Nb3Sn Rutherford cables

Lenoir, Gilles; Puthran, Kirtana 1; Barth, Christian ; Fleiter, Jérôme; Ballarino, Amalia
1 Institut für Technische Physik (ITEP), Karlsruher Institut für Technologie (KIT)

Abstract:

The accelerator magnets for the high luminosity upgrade of the large Hadron collider use Nb3Sn conductor to achieve the required in-field performance. To sustain the Lorentz forces during operation, a pre-compression is applied to the coils during the fabrication of the magnet. This can lead to an irreversible degradation of the Nb3Sn conductor due to its mechanical sensitivity. In this study, the impact of the pre-compression applied to the conductor at room temperature is investigated using a reacted double-stack specimen made of two Nb3Sn Rutherford cables. The cables have a keystone angle and are stack with a non-inverted configuration, without compensating the angle. The rectangular specimen is submitted to increasing transverse compressive stresses at room temperature applied perpendicularly to its width. The non-inverted configuration and the rectangular shape of the total specimen can thus lead to stress concentration. The pressure applied covers the range from 130 MPa to 190 MPa with a 10 MPa step increase. After each cumulated stress level, transport current measurements are performed in liquid helium and in background fields of up to 9.6 T in the FReSCa test station at CERN Metallographic analyses of several samples are made at selected stress levels. ... mehr

Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 02.2024
Sprache Englisch
Identifikator ISSN: 0953-2048, 1361-6668
KITopen-ID: 1000168197
HGF-Programm 38.05.03 (POF IV, LK 01) High Temperature Superconductivity
Erschienen in Superconductor Science and Technology
Verlag Institute of Physics Publishing Ltd (IOP Publishing Ltd)
Band 37
Heft 2
Seiten Art.-Nr.: 025013
Vorab online veröffentlicht am 24.01.2024
Schlagwörter Nb3Sn, Rutherford cable, cracks, damage, metallographic analysis, critical current, transverse compressive stress
Nachgewiesen in Web of Science
OpenAlex
Scopus
Dimensions

Verlagsausgabe §
DOI: 10.5445/IR/1000168197
Veröffentlicht am 08.02.2024
Originalveröffentlichung
DOI: 10.1088/1361-6668/ad1341
Scopus
Zitationen: 2
Web of Science
Zitationen: 1
Dimensions
Zitationen: 2
Seitenaufrufe: 42
seit 08.02.2024
Downloads: 38
seit 09.02.2024
Cover der Publikation
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page