Django-Jorek code: a numerical box for MHD discretization and JOREK A. Ratnani 2 ,B. Nkonga 35 , E. Franck 1 ,C. Caldini-Queiros 2 , L. Mendoza 2 , G. Latu 4 , V. Grandgirard 4 , E. Sonnendr¨ ucker 26 , M.H¨olzl 2 , H. Guillard 5 ,, 16 September 2015 1 INRIA Nancy Grand-Est and IRMA Strasbourg, TONUS team, France 2 Max-Planck-Institut f¨ ur Plasmaphysik, Garching, Germany 3 Nice university, Nice, France 4 CEA/DSM/IRFM, Cadarache, France 5 INRIA Sophia-Antipolis, CASTOR team, France 6 TUM center of mathematics, Garching, Germany E. Franck Adaptive Preconditioning 1/20 1 / 20