Fig. 2From: Schlieren imaging: a powerful tool for atmospheric plasma diagnosticComparison of synchronized ICCD (left) and schlieren (right) images of a helium APPJ for different values of peak voltage (PV) and pulse repetition frequency (PRF). Flow rate set at 3 SLPM of He for all cases [54] © 2015 IEEE. Reprinted, with permission, from  IEEE Transactions on Plasma ScienceBack to article page