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, ΡTe* = Ρs/LTecharacterises with a low computational cost the typical ITB features such as the emergence time, location, collapse time and dynamics [Ρsis the local Larmor radius and LTeis the temperature gradient scale length LTe= -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 are 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.
|Publication status||Published - 2002|
|Event||19th IEEE/NPSS Symposium on Fusion Engineering (19th SOFE) - , United States|
Duration: 1 Jan 2002 → …
|Conference||19th IEEE/NPSS Symposium on Fusion Engineering (19th SOFE)|
|Period||1/1/02 → …|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Nuclear Energy and Engineering
Riva, M., Mazon, D., Felton, R., Litaudon, X., Tresset, G., Becoulet, A., ... Lennholm, M. (2002). Towards real time control of the internal transport barriers on Jet. Paper presented at 19th IEEE/NPSS Symposium on Fusion Engineering (19th SOFE), United States.