A multiple-time-scale approach to the control of ITBs on JET
The simultaneous real-time control of the current and temperature gradient profiles could lead to the steady state sustainment of an internal transport barrier (ITB) 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. The current profile was controlled through the inverse safety factor profile, ?=1/q, and the temperature gradient profile was controlled through the profile of another non-dimensional parameter, rho*Te, which characterizes internal transport barriers in JET (rho*(Te) is the normalized electron temperature gradient introduced in).
Bibliographic Reference: An oral paper given at: 32nd EPS Conference on Controlled Fusion and Plasma Physics Organised by: Asociación EURATOM-CIEMAT para Fusión Held at: Congress Palace of Tarragona, Tarragona (ES)
Availability: Available from Association EURATOM-CEA, Departement de Recherches sur la Fusion Controlee, CEA Cadarache, F-13108 St Paul-Lez-Durance, FranceL%Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: firstname.lastname@example.org
Record Number: 200518275 / Last updated on: 2005-07-26
Original language: en
Available languages: en