Erratum: Interaction of an atmospheric pressure plasma jet with grounded and floating metallic targets: Simulations and experiments (Plasma Sources Sci. Technol. (2020) 29 (095011) DOI: 10.1088/1361-6595/aba7ec)

An unfortunate mistake has been identified in figure 5 of the article ?Interaction of an atmospheric pressure plasma jet with grounded and floating metallic targets: simulations and experiments? [1]. The correct spatial and temporal distributions of the electron impact ionization source term (Se) are given in the corrected figure 5 below. The mistake results in a three order of magnitude deviation in the figure, but not in the plasma simulation. Indeed, in the referenced work the magnitudeof Se has maxima between 1020 cm?3 s?1 and 1021 cm?3 s?1. These values have the same order of magnitude as those in other simulation works on He plasma jets [2?7]. This correction does not change the main conclusions of the article, namely, the electric potential of the floating target, on the presence of the return stroke with both targets and the event at the fall of the pulse and on the effects these events have on discharge parameters. However, the conclusion that the observed increases of electron density (ne) (with the return stroke and with the electric field redistribution at the fall of the pulse) are mostly attributed to electron emission from metallic surfaces should be changed, as the corrected Se also contributes significantly to electron production. Thus, both processes (ionization in volume and electron emission from the target), together with electron transport in the plasma, can constitute the main sources of the experimentally and numerically observed increases of ne. This correction affects the text of page 12 of the original article and the last sentence of the conclusions section.