000253203 001__ 253203
000253203 005__ 20190619220015.0
000253203 037__ $$aPOST_TALK
000253203 245__ $$aNumerical optimization of the ramp-down phase with the RAPTOR code
000253203 260__ $$c2017
000253203 269__ $$a2017
000253203 336__ $$aPosters
000253203 513__ $$aPosters
000253203 520__ $$aThe ramp-down optimization goal in this work is defined as the fastest possible decrease of a plasma current while avoiding any disruptions caused by reaching physical or technical limits. Numerical simulations and preliminary experiments on TCV and AUG have shown that a fast decrease of plasma elongation and an adequate timing of the H-L transition during current ramp-down can help to avoid reaching high values of the plasma internal inductance. The RAPTOR code (F. Felici et al, 2012 PPCF 54; F. Felici, 2011 EPFL PhD thesis), developed for real-time plasma control, has been used for an optimization problem solving. Recently the transport model has been extended to include the ion temperature and electron density transport equations in addition to the electron temperature and current density transport equations, increasing the physical applications of the code. The gradient-based models for the transport coefficients (O. Sauter et al, 2014 PPCF 21; D. Kim et al, 2016 PPCF 58) have been implemented to RAPTOR and tested during this work. Simulations of the AUG and TCV entire plasma discharges will be presented.
000253203 700__ $$g241636$$aTeplukhina, Anna$$0247983
000253203 700__ $$g106355$$aSauter, Olivier$$0240094
000253203 700__ $$aFelici, F.
000253203 700__ $$0247013$$aMerle, Antoine$$g230836
000253203 7112_ $$d23 Oct - 27 Oct 2017$$cMilwaukee, WI, US$$a59th Annual Meeting of the APS Division of Plasma Physics
000253203 8560_ $$fstefano.coda@epfl.ch
000253203 8564_ $$uhttps://infoscience.epfl.ch/record/253203/files/Teplukhina_APS2017_poster.pdf$$s1688081
000253203 8564_ $$uhttps://infoscience.epfl.ch/record/253203/files/Teplukhina_APS2017_poster.pdf?subformat=pdfa$$s5668963$$xpdfa
000253203 909C0 $$mstefano.coda@epfl.ch$$zPasquier, Simon$$pSPC$$0252028$$xU12272
000253203 909CO $$pSB$$ppresentation$$pposter$$ooai:infoscience.epfl.ch:253203$$qGLOBAL_SET
000253203 960__ $$aanna.teplukhina@epfl.ch
000253203 961__ $$alaurence.gauvin@epfl.ch
000253203 973__ $$sPUBLISHED$$aEPFL
000253203 980__ $$aPOST_TALK
000253203 981__ $$aoverwrite