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The environment within and around the plasma chamber of ITER will be characterised by strongly changing electric and magnetic fields during normal operation (plasma start-up, shaping, control), and off-normal conditions (vertical instabilities and disruptions). In the first case, the typical time scale ranges from 100 ms to 1 s, while for the disruption events the current decay lasts some tens of ms. During the ITER joint work activity, several models and procedures have been set up to analyse and predict the transient electromagnetic phenomena. A good understanding has been obtained of the nature and magnitude of the transient effects related to the inductive coupling (induced currents, magnetic fields and thermo-mechanical loads) to the point where reliable design specifications can be given for the engineering work. Future activities will be devoted to the enlargement of the database, to the spectrum of proposed scenarios for ITER and to the investigation of the parametric effects of the plasma and geometry characteristics. More effort will also be spent on increasing the understanding of the "halo" currents effect.

Additional information

Authors: CRUTZEN Y ET AL., JRC Ispra (IT)
Bibliographic Reference: Paper presented: 13th International Conference on Plasma Physics and Controlled Nuclear Fusion Research, Washington DC (US), Oct. 1-6, 1990
Availability: Available from (1) as Paper EN 35910 ORA
Record Number: 199110221 / Last updated on: 1994-12-02
Original language: en
Available languages: en