Evaluating Kernels on Xeon Phi to accelerate Gysela application Guillaume Latu, Matthieu Haefele, Julien Bigot, Virginie Grandgirard, Thomas Cartier-Michaud and Fabien Rozar ESAIM: Proc., 53 (2016) 211-231 Published online: 01 April 2016 DOI: 10.1051/proc/201653013