Abstract
In this paper we classify magnetic trajectories gamma in R2N+1 endowed with a canonical quasi-Sasakian structure, corresponding to a magnetic field proportional to the fundamental 2-form. We prove that they are helices of order 5 and we show that there exists a totally geodesic R-5 in R2N+1 such that gamma lies in R-5. Moreover, the quasi-Sasakian structure of R-5 is that induced from the ambient manifold.