Synthesis of water ice particles in a plasma chamber

We describe a new type of experiment where micrometer‐size water ice particles are created from D2 and O2 in the plasma chamber, with the electrodes cooled by liquid nitrogen. In the reactor, D2 and O2 are decomposed by electron impacts and form precursors for chemical reactions. Water ice particles are produced within a second after plasma ignition. We propose a simple growth/sedimentation model, which reproduces the experimental data.