27 August 2017 to 1 September 2017
RAI Congress Center, Amsterdam, The Netherlands
Europe/Amsterdam timezone

Analysis of Minimum Quench Energy of ITER NbTi and Nb3Sn CICCs

28 Aug 2017, 18:00
15m
G102-103 Room

G102-103 Room

Regular 15 minutes Oral Presentation G3 - Stability of Conductors and Coils Mon-Af-Or9

Speaker

Tommaso Bagni (University of Twente)

Description

The Cable-In-Conduit Conductors (CICCs) for the ITER magnets are subjected to fast changing magnetic fields during the plasma-operating scenario. In order to anticipate to the limitations of the conductors under the foreseen operating conditions, it is essential to have a better understanding of the stability margin of the magnets. In the last decade ITER has launched a campaign for characterization of several types of NbTi and Nb3Sn CICCs comprising quench tests. The conductors are subjected to a singular sine-wave fast magnetic field pulse and relatively small amplitude with respect to the ITER plasma operating scenario. The Minimum Quench Energy (MQE) tests, performed in the SULTAN facility, were reproduced and analyzed using JackPot-ACDC, an electromagnetic-thermal model for CICCs, developed at the University of Twente and THEA (Thermal, Hydraulic and Electric Analysis of Superconducting Cables). The experimental results were used to calibrate the numerical models and to reproduce the energy deposited in the cable during the MQE stability tests. The agreement between experiments and models shows a good comprehension of the various CICCs thermal and electromagnetic phenomena. The results provide a good basis for further investigation of conductor stability and extrapolative scaling for different magnetic field pulses with lower ramp rate and higher amplitude.
Disclaimer: The views and opinions expressed herein do not necessarily reflect those of the ITER Organization.

Submitters Country Netherlands

Primary authors

Tommaso Bagni (University of Twente) Prof. Marco Breschi (Bologna University) Jean-Luc Duchateau (CEA) Arnaud Devred Arend Nijhuis (University of Twente)

Presentation Materials

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