Cold Plasma
A cold atmospheric-pressure plasma jet in a helium/deuterated-water (HDO) mixture in the lab of Grant Ritchie, University of Oxford, UK. The plasma is pulsed at 20 kHz and is probed by the laser beam of a fast mid-infrared dual-comb spectrometer (IRsweep, IRis-F1) to study changes in the energy state population density of HDO.
[OPN 2022 Photo Contest Honorable Mention]
—Michele Gianella, Empa, Dübendorf, Switzerland