Cover picture : Plasma Processes and Polymers 1/2020

Outside Front Cover: A novel plasma source ‘HelixJet’, operated at atmospheric pressure is introduced. Double helix electrodes driven by a radio frequency power supply generate a homogeneous glow discharge in a large volume quartz pipe. This renders the ‘HelixJet’ as a potential new additive manufacturing tool, in which polyamide powders can be simultaneously surface treated and partially melted to enable plasma‐based 3D printing of powders usually used in Laser Sintering.