Plasma Wind Tunnel Investigation of European Ablators in Nitrogen/Methane Using Emission Spectroscopy

Figure 3

Measured (black) and simulated (red) free-stream spectra at the plasma jet center for plasma condition C1, including the simulated plasma species N₂ (𝑇_rot=5000 K, 𝑇_vib=3000 K), N₂⁺ (𝑇_rot=11000 K,  𝑇_vib=10000 K), and CN (𝑇_rot=9000 K, 𝑇_vib=8000 K).