Erlangen 2026 – scientific programme
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P: Fachverband Plasmaphysik
P 8: Low Pressure Plasmas II
P 8.5: Talk
Tuesday, March 17, 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 Orel1, 2, Youssef Haouchat1, 3, Tat Loon Chng1, 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