The particles are then accelerated by the Booster Synchrotron to per nucleon, which injects the projectile now with " Q " = + 77 into the Alternating Gradient Synchrotron ( AGS ), before they finally reach per nucleon and are injected in a " Q " = + 79 state ( no electrons left ) into the RHIC storage ring over the AGS-to-RHIC Transfer Line ( AtR ).