Knowledge Bank

The latest upgrades and results from the FANTASIO+ set-up, \textit{Mol. Phys.} 2010, \textbf{108}, 2158-2164} (for 'Fourier trANsform, Tunable, diode and quadrupole mAss spectrometers interfaced to a Supersonic expansIOn') are presented. Thanks to the improvements of the calibration (better than $\pm 1\times 10-3$ cm$\mathrm{<mrow\; data-mjx-texclass="ORD">-1</mrow>}$ accuracy) and the ring-down time (130 $\mu$s), the spectrum of C$2$H$2$-N$2$ around 6500 cm$\mathrm{<mrow\; data-mjx-texclass="ORD">-1</mrow>}$ was recorded as well as absorption bands due to combined excitations of intra and intermolecular modes of C$2$H$2$-Ar, C$2$H$2$-CO$2$ and C$2$H$2$-N$2$O. A hot absorption band of the van der Waals complex C$2$H$2$-Ar was also observed. The first analyses of these spectra will be presented.\ \ Along the development of the FANTASIO+ set-up, a new injection system to probe samples liquid at STP conditions, and a pulse injector are currently under implementation. Those upgrades will allow the study of organic and prebiotic molecules and a better cooling of the gas in the expansion, respectively. The first results will also be presented.