[syhprum (OP)]

I would be interesting to send a probe to the Centauri system but I see several problems, firstly the speed must be at least .05c and the only means I know of to produce such a high speed is with a Photon beam but that requires 500MW  per Newton so the acceleration would be extremely low.
The next problem would be interstellar particles with which it would collide even at the modest speed of ISS these pose a problem which is tiny compared with what Centauri 1 would face.
please detail your designs.

[Atomic-S]

Would an advanced ion rocket do the job? Not saying it would be easy. The charged particles would  have to be accelerated through a very much greater potential difference than current technology uses, which requires the hardware to do that, which might be so bulky as to negate the thrust. Or, the charge could be accelerated via something like a cyclotron, also very bulky.  Or, the power could come via photovoltaic panels energized by lasers mounted on Earth or elsewhere in the Solar System, creating a large potential difference between two widely spaced electrodes, which would be much less bulky. Note that this scheme does not rely solely upon the laser light to provide the momentum to the ship.