Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

P: Fachverband Plasmaphysik

P 8: Low Pressure Plasmas II

P 8.5: Vortrag

Dienstag, 17. März 2026, 17:45–18:00, KH 01.020

Nanosecond discharges at high reduced electric fields as a tool for measuring energy efficiency (G-values) — •Inna Orel^{1, 2}, Youssef Haouchat^{1, 3}, Tat Loon Chng^{1, 4}, and Svetlana Starikovskaia¹ — ¹Laboratory of Plasma Physics (CNRS, Ecole Polytechnique, University Paris-Sud, Observatoire de Paris, Sorbonne Universite, Universite Paris-Saclay, IPP), Palaiseau, France — ²Ruhr University Bochum, Institute for Plasma and Atomic Physics, Bochum, Germany — ³Biomedical Imaging Group, Ecole polytechnique federale de Lausanne, Lausanne, Switzerland — ⁴Department of Mechanical Engineering, College of Design and Engineering, National University of Singapore, Singapore

We examine N-atom production in a pure N₂ cylindrically symmetric, nanosecond, repetitively pulsed discharge at moderate pressure and high reduced electric field (E/N). Two specific energy deposition (SED) cases - 1 eV/molecule and 10⁻² eV/molecule - are investigated. On-axis N-atom densities are obtained using two-photon absorption laser-induced fluorescence (TALIF), and SED values are derived from voltage waveforms measured with back-current shunts. Radial species distributions are included in the analysis. The experimental G-values are compared with kinetic modelling. The results highlight the suitability of nanosecond discharges for studying dissociation efficiency at high reduced E/N.

Keywords: G-value; TALIF; nanosecond discharge; high reduced electric field; N-atom