Figure S1

Upper panel: comparison of jet spectra of MeOH+2FAP in He with the same total substance consumption \Sigma n (1500 pulses at the gratin (gr, red, displaced by +0.24 along the ordinate), 36 pulses at the filet (fi, green) jet). As a point of reference, the total consumption at the gratin jet (2 fillings of the reservoir) was chosen. Lower panel: negative decadic logarithm of the root-mean-square error (-lg(RMSE)) of the noise level in a 50 cm^-1 moving window with respect to a quadratic fit of the baseline. The spectral regions occupied by absorption bands of the sample mixture, which cannot be used for the analysis of the noise level, are shaded in grey.