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

Quench energy in ITER conductors for different magnetic field perturbations with JackPot and THEA combined models

30 Aug 2017, 13:15
1h 45m
Posters Area

Posters Area

Poster Presentation of 1h45m G3 - Stability of Conductors and Coils Wed-Af-Po3.11

Speaker

Tommaso Bagni (University of Twente)

Description

The electromagnetic-thermal model for Cable-in-Conduit Conductors JackPot-ACDC and THEA (Thermal, Hydraulic and Electric Analysis of superconducting cables) are combined for prediction of the stability of ITER Central Solenoid conductors. The combination of both models allows to predict the effect of any type of magnetic field perturbation in time relevant for the magnet coils during the plasma operation scenario of the reactor. At present there is no experiment to test the stability of the ITER Nb3Sn conductors under such conditions. Only limited experimental data on Minimum Quench Energy (MQE) defining the conductor stability are available but the time and magnetic field amplitude settings are quite different from the actual ITER operating conditions. Nevertheless such tests are useful as a basis to calibrate and benchmark the codes. JackPot+THEA allows to determine the MQE for any magnetic field change in time and to fully describe the involved electromagnetic phenomena on strand level detail in terms of local power dissipation and (peak) electric field. Thermally the computation is still on a global scale identifying the quench initiation and propagation. The predictions from the combined codes are in good agreement with the experiments and provide a solid basis for extrapolative scaling of CICC’s stability under plasma operating conditions.
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) Arnaud Devred Arend Nijhuis (University of Twente)

Presentation Materials