A gyro-kinetic model for trapped electron and ion modes Thomas Drouot, Etienne Gravier, Thierry Reveille, Alain Ghizzo, Pierre Bertrand, Xavier Garbet, Yanick Sarazin and Thomas Cartier-Michaud Eur. Phys. J. D, 68 10 (2014) 280 Published online: 01 October 2014 DOI: 10.1140/epjd/e2014-50151-2