Particle accelerators use the electromagnetic force to accelerate particles. For this reason they can only use charged particles. Neutrons have no charge so they will not be affected by an electromagnetic field. The electric field is used to accelerate a particle and the magnetic field is used to guide the particle. Linear accelerators are very good at moving smaller mass particles. Circular accelerators lose some energy as the move a particle around the curves of a circle but they do a good job with higher mass particles.

(The Great Courses – The Higgs Boson and Beyond)