Stability of a slab collisional microtearing mode

International audienceThe stability of a collisional microtearing (MTM) is investigated by means of linear gyro-kinetic simulations and a theoretical linear dispersion relation. The electric potential fluctuations and the magnetic curvature are neglected in the simulations to match the theoretical model assumptions. In these conditions, the stability domain, the mode growth rate and the mode frequency predicted by the theory and the simulations are in satisfactory agreement. The radial structure of the mode has been also investigated and the localisation of the parallel current around the resonnant surface predicted by the theory is recovered by the simulations