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)

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