Multi-device study of MHD modes locking in tokamaks

POSTER

Abstract

Tearing modes amplitude is a key ingredient to develop physics based disruption prediction methods. Depending on the experimental situation, these modes may rotate or be locked prior to the disruption, which complicates their amplitude incorporation into a multi-machine approach. The aim here is to characterise the mode locking process across several devices. A database of >150 COMPASS, >220 AUG and >40 JET discharges with an initially rotating disruptive mode was therefore assembled. Database entries vary from quasi-stable NTMs to immediately locking radiative instabilities. The deceleration of an initially rotating resistive mode to the locked state via an interaction with the resistive wall and error fields has been described by a mode locking model in the past1,2,3. Capability of the model to characterize the phenomenon in devices of various plasma sizes under broad distribution of plasma parameters (ne, q95, li etc.) will be tested.

1M.F.F. Nave et al Nucl. Fusion 30 2575 (1990

2D.A. Gates et al Nucl. Fusion 36 273 (1996)

3R.J. La Haye et al Nucl. Fusion 46 451 (2006)

*This work was supported by the European Commission, carried out within the frameworks of the FUSION-DC and of the EUROfusion Consortium and has received funding from the Euratom (Grant Agreement No 633053).

Presenters

  • V. Klevarova

    • Ghent University

Authors

  • V. Klevarova

    • Ghent University

  • G. Pautasso

    • IPP Garching

  • Hartmut Zohm

    • Max Planck Institute fur PlasmaPhysik
    • Max Planck Inst
    • IPP Garching
    • Max Planck Institute for Plasma Physics, 85748 Garching, Germany

  • Peter C de Vries

    • ITER Organization

  • Michael Lehnen

    • ITER Organization

  • T. Markovic

    • Institute of Plasma Physics of the CAS, Czech Republic, Charles University, Czech Republic
    • IPP of CAS, Charles University
    • Institute of Plasma Physics of the CAS, Prague, Czech Republic

  • M. Komm

    • IPP of CAS

  • J. Havlicek

    • IPP of CAS

  • G. Verdoolaege

    • Univ. of Ghent, Belgium
    • Ghent University, LPP-ERM/KMS

  • JET Contributors

    • See the author list of “X. Litaudon et al 2017 Nucl. Fusion 57 102001”, See the author list of “X. Litaudon et al 2017 Nucl. Fusion 57 102001”
    • EUROfusion Consortium
    • EUROfusion Consortium, JET, Culham Science Centre, Abingdon, OX14 3DB, UK

  • the EUROfusion MST1 Team

    • See the author list H. Meyer et al 2017 Nucl. Fusion 57 102014
    • EUROfusion Consortium

  • the ASDEX Upgrade Team

    • Max-Planck-Institute for Plasma Physics
    • IPP Garching
    • Max Planck Inst
    • Max-Planck-Institute for Plasma Physics, Garching, Germany