The fusion reactor will work if the majority of the energy leaked out in the form of electromagnetic radiation can be trapped and kept inside the reactor. A big problem preventing this is the laser gain mediums used to extract the leaked radiation and reconvert it into coherent radiation to send into the reactor overheat. Traditionally this is looked upon as an intractable problem since the laser gain medium materials do not have enough thermal diffusivity to cool when operating in continuous wave mode. The way around this is to either add so many lasers that they can fire like pistons, or a better way of cooling the medium is found. But, there is a third option that seems unexplored. What if the medium itself flowed and moved to a place to dump its heat? This way no one section gets inundated with thermal energy and overheats. Could this be made? Could it be flowed without any turbulence to ensure the beam comes straight?
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