The full design for the high voltage power supply is now available on the Wiki.by Kempy - MetalicaRap
From my understanding, the existing Arcam EMB prints inside of a vacuum. Also, the bed will be at a potential 63KV above that of the cathode.by Kempy - MetalicaRap
Just to clarify, the chamber will contain a vacuum rather than an inert gas, but I guess a mist could still be created with a strong enough charge.by Kempy - MetalicaRap