Giuseppe Scarantino
Experimental qualification of the first DTT TF superconducting cables in SULTAN.
Rel. Roberto Bonifetto, Andrea Zappatore. Politecnico di Torino, Master of science program in Energy And Nuclear Engineering, 2022
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Abstract
The objective of this work is the experimental qualification of the performance of the first ENEA superconducting (SC) cables for the toroidal-field (TF) coils of the Divertor Tokamak Test (DTT) Facility that is being built in Frascati [1]. Two full-scale, short-length conductor samples with different twist-pitch have been tested from the begin of July 2022 in SULTAN, a test facility operated by EPFL-SPC (Swiss Plasma Center) and located at Paul Scherrer Institute (PSI) in Villigen, Switzerland. In this one-of-a-kind magnetic facility, the superconductors have been tested in a forced flow of supercritical Helium with nominal current and magnetic field up to 11 T.
Before testing, the SC cables made of Nb3Sn were prepared in the facility: they underwent heat-treatment and were assembled and instrumented with high precision thermometers, voltage taps and, in the case of one of the two samples (the TF-B one), also equipped with pressure capillaries to allow a more precise hydraulic characterization
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