Axisymmetric Equilibrium and Stability Analysis in Alcator C-Mod: Including Effects of Current Profile, Measurement Noise and Power Supply Saturation - Couverture souple

Ferrara, Marco

 
9783659532801: Axisymmetric Equilibrium and Stability Analysis in Alcator C-Mod: Including Effects of Current Profile, Measurement Noise and Power Supply Saturation
Couverture souple
ISBN 10 : 3659532800 ISBN 13 : 9783659532801
Editeur : LAP LAMBERT Academic Publishing, 2014

Synopsis

The vertical position of elongated tokamak plasmas is unstable on the time scale of the eddy currents in the axisymmetric conducting structures. In the absence of feedback control, the plasma would drift vertically and quench on the wall, a situation known as Vertical Displacement Event (VDE), with serious consequences for machine integrity. As tokamaks approach reactor regimes, VDE’s cannot be tolerated: vertical feedback control must be robust against system uncertainty and the occurrence of noise and disturbances. At the same time, adaptive routines should be in place to handle unexpected events. The problem of robust control of the vertical position can be formulated in terms of identifying which variables affect vertical stability and which ones are not directly controlled/controllable; identifying the physical region of these variables, and the corresponding most unstable equilibria; and designing the control system to stabilize all equilibria with sufficient margin. The margin should be enough to allow the system to tolerate realistic scenarios of noise and disturbances.

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Éditeur
LAP LAMBERT Academic Publishing
Date d'édition
2014
Langue
anglais
ISBN 10 
3659532800
ISBN 13 
9783659532801
Reliure
Broché
Nombre de pages
160
Coordonnées du fabricant
non disponible
Personne responsable
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