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On-Line Confinement Regime Identification for the Discharge Control System at ASDEX Upgrade
Volume 33 · Number 1 · January 1998 · Pages 84-96
Technical Paper
Peter Franzen, Michael Kaufmann, Vitus F. Mertens, Gregor Neu, Gerhard Raupp, Thomas Zehetbauer, The ASDEX Upgrade Team, The NI Team
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An algorithm is presented that identifies major confinement regimes on-line during a plasma discharge in the Tokamak ASDEX Upgrade. Apart from the ohmically heated regime with no additional heating power, low and high radiative L and H regimes are distinguished. The algorithm was successfully implemented in the ASDEX Upgrade discharge control system, allowing a dynamic control of the plasma discharge. In a first application, the control system recognized the falling back of the plasma from a high confinement regime to a low confinement regime and reacted accordingly, avoiding a disruption and enhancing the plasma performance by recovering the high confinement regime.
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