By Topic

Towards real time control of the internal transport barriers on JET

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

12 Author(s)
Riva, M. ; Associazione Euratom-ENEA sulla Fusione, Frascati, Italy ; Mazon, D. ; Felton, R. ; Litaudon, X.
more authors

Recently a local criterion characterising the emergence and space-time evolution of internal transport barriers (ITB) has been proposed and extensively validated on the large JET database. It was shown that a dimensionless local parameter, ρ˙(Te) =ρs/L(Te) characterises with a low computational cost the typical ITB features such as the emergence time, location, collapse time and dynamics [ρs is the local Larmor radius and L(Te) is the temperature gradient scale length L(Te)=-Te/(∂Te/∂R)]. We report on the recent implementation of the calculation of the ITB criterion together with the associated feedback algorithms in the real time system of JET. The system purpose is to acquire all the analogue channels of the high space resolution electron temperature ECE diagnostic (heterodyne radiometer) and to calculate in real time the relevant ITB parameters which am used for the control: the maximum value of the dimensionless local temperature gradient, the ITB radius and width, the core and volume averaged electron temperature.

Published in:

Fusion Engineering, 2002. 19th Symposium on

Date of Conference:

2002