Disclosed are radiation treatment systems with enhanced control architectures that enable more complex treatment plans to be implemented, and radiation treatment systems with enhanced resistance to the effect of neutrons. An exemplary control architectures comprises: a digital packet network a supervisor electrically coupled to the digital packet network and having a treatment plan and a plurality of nodes, each node coupled to digital packet network and controlling one or more treatment-related components of the radiation treatment system and wherein the supervisor periodically communicates control orders to the nodes over the digital packet network.
