DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2008 EXPERIMENTAL CAMPAIGN
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| Title | 463: Real-time q and Te profile control based on dynamical model approach | ||
| Name: | Didier J Mazon ( |
Affiliation: | CEA Cadarache |
| Research Area: | Model based Control | Presentation time: | Not requested | Co-Author(s): | D.Moreau (CEA) |
| Description: | In the so-called advanced operation scenarios, real-time control of current, temperature and density profiles is essential. We propose to use a model based approach to control the q-profile (and potentially Te profile if available in real time)in feedback during a high performance pulse. This task is crucial to sustain a stationary ITB. | ||
| Experimental Approach/Plan: | For the design of the controller, a linearized model of the plasma profile responses to the different heating and current drive devices must be identified on the basis of experimental results (modulations of the actuators in open loop). In order to improve the controller performance a dynamical model of the profile response is foreseen and will be used to design the controller. | ||
| Background: | Recently (March 2007) a model based approch has been used with sucess at JET for q profile control and feedback loop has been performed. The controller was using 4 actuators (LHCD, ICRH, NBI powers and the loop voltage) for controlling 5 points of the q profile while at the same time the shape of the plasma was controlled as well to optimize the coupling.See for example D.Mazon IEEE conference San Diego December 2006 for more details about the technique. | ||
| Resource Requirements: | Machine time:1 or 2 days for modulations and 1 day for experiments. In order to optimize the model and the controller few weeks between modulations and close loop experiments are needed. | ||
| Diagnostic Requirements: | RT EFIT, Beam, ECH, Core and tangential Thomson,magnetics, MSE, ECH diagnostics | ||
| Analysis Requirements: | -- | ||
| Other Requirements: | -- | ||
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