Cold Plasma
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

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