Spatially resolved study of spokes in reactive HiPIMS discharge

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Authors

ŠLAPANSKÁ Marta KROKER Michael KLEIN Peter HNILICA Jaroslav VAŠINA Petr

Year of publication 2022
Type Article in Periodical
Magazine / Source Plasma Sources Science and Technology
MU Faculty or unit

Faculty of Science

Citation
Web https://iopscience.iop.org/article/10.1088/1361-6595/ac6a0c
Doi http://dx.doi.org/10.1088/1361-6595/ac6a0c
Keywords spokes; ionisation zones; OES; Langmuir probe; titanium target; reactive HiPIMS; nitrogen
Description Understanding mechanisms behind the formation and propagation of ionisation zones, so-called spokes, have been highly important since the first observations in HiPIMS discharges. To this day, however, a complete description is still lacking. This contribution gives an insight into the spokes in reactive Ar-N2 atmosphere using titanium target. The aim of this study is to describe not only global parameters of spokes such as their shape, length and propagation velocity but also provide a description of parameters evolving over the spoke, such as floating potential and spectral emission. The measurements of the latter clearly showed which species emission is most prominent and how it changes with transition from non-reactive argon discharge towards the discharge driven in a pure nitrogen atmosphere. Implications on the gas dynamics and discharge transitions are discussed.
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