High-Resolution Dual-Comb Spectroscopy at 9.5 μm for Plasma-Assisted Ammonia Production

We measure ammonia (NH
3
) production in nitrogen-hydrogen (N
2
:H
2
) plasmas using high-resolution quantum cascade laser dual-comb spectroscopy in the long-wave infrared. Doppler-broadened NH
3
spectra reveal temperature profiles and product abundances as a function of plasma conditions.