Comment on ‘Mapping the electric field vector of guided ionization waves at atmospheric pressure’, (2020) Plasma Res. Express 2 025014

Abstract

Recently, Iséni reported measurements and analysis of electric field (EF) strengths adjacent to, and in propagating ionization waves (IWs) for non-thermal atmospheric pressure He plasma jets [1]. This paper [1] is almost the full copy of the 2017 ArXiv :1709.03109v1 [2] for which the authors already published a comment [3]. In this comment, we confirm first that the reported results are wrong due to an improperly aligned electric field probe, and second, that even these wrong measurements are themselves inconsistent.