Abstract
The simultaneous real-time control of the current and pressure profiles
could lead to the steady state sustainment of an internal transport barrier
(ITB), region where heat and particle transport are strongly reduced and so to
a stationary optimized plasma regime. Recent experiments in JET have
demonstrated significant progress in achieving such a control: different
current and temperature gradient target profiles have been reached and
sustained for several seconds using a controller based on a static linear
model identification. Nevertheless, these experiments have shown that the
controller was sensitive to rapid plasma events such as transient ITBs during
the safety factor profile evolution or Magneto-Hydrodynamics (MHD)
instabilities which modify the pressure profiles on the confinement time
scale. The control technique has been improved by using a multiple-time-scale
approximation in order to better respond to these rapid plasma events. The
paper describes the theoretical analysis and closedloop simulations using the
controller that will be tested experimentally in JET during the forthcoming
campaign.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the IEEE Conference on Decision and Control |
| Publisher | IEEE Institute of Electrical and Electronic Engineers |
| Pages | 2195-2200 |
| ISBN (Print) | 1-4244-0171-2 |
| DOIs | |
| Publication status | Published - 2006 |
| MoE publication type | A4 Article in a conference publication |