Carriage particle accelerators
Carriage particle accelerators do the following: They have many carriages (high speed carrier pellets) that pick up nano sized payloads accelerate them half of the thrusters length let go of the payloads then decelerate to stop before the thrusters end and finally accelerate and decelerate back to the starting point. Alternately the carriages go in droplet formed loops of speed dependent radius. Then they only need to accelerate and decelerate once per cycle but must take care that the released payloads don't crush into retreating empty carriages from layers further outward. A sturdy symmetric configuration is needed to avoid unbalanced torque.
- For low areal densities of exhaust particles infinitesimal bearings can be used.
- For high areal densities some form of levitation for the carriages must be employed (charged carriages).
- as alternative space propulsion system remotely akin to ion thrusters
- to accelerate fuel pellets for inertial fusion (speculative!)