Data di Pubblicazione:
2000
Citazione:
Progress on the conductor for the superconducting toroids of the ATLAS experiment / L. Rossi, G. Volpini, C. Berriaud, I.L. Horvath, J. Neuenschwander. - In: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY. - ISSN 1051-8223. - 10:1(2000), pp. 369-372. ((Intervento presentato al 16. convegno International Conference on Magnet Technology tenutosi a Tallahassee nel 1999.
Abstract:
The production of the conductor for the superconducting toroids of the Atlas experiment at LHC (CERN) is under way. The conductor is obtained by coextruding a big Rutherford cable with very pure aluminum. All toroids, one Barrel Toroid (BT) and two End Cap Toroids (ECT), require a conductor with a critical current of about 60 kA at 5 T, 4.2 K and a RRR in excess of 800 (at zero field), together with a very good bonding between cable and aluminum: 20 MPa for the BT and 15 MPa for the ECT. So far four long lengths, approximately 7 km out of the 90 km of the total need, have been successfully produced, thus demonstrating the feasibility of the process. The paper describes the results of the R&D phases and the results obtained in this first production. The critical current degradation due to cabling and coextrusion was found quite moderate (7-8% in total), despite the low copper content of the strands (Cu:NbTi = 1.09-1.18). The bonding was also very good with values well in excess of the specification. A special control system based on continuous ultrasonic inspection was used in the coextrusion line to monitor the bonding quality in real time during production.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
L. Rossi, G. Volpini, C. Berriaud, I.L. Horvath, J. Neuenschwander
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