Publication at Faculty of Mathematics and Physics |
2018
Abstract
A Cryogenic Stationary Afterglow apparatus with Cavity Ring-Down Spectrometer (Cryo-SA-CRDS) has been designed and tested. Experimental setup covers temperature range from 30 K up to 300 K for precise study of electron-ion recombination i.e. at conditions relevant to interstellar medium.
The first calibration and tests using He/Ar/H2 and He/H2 gas mixtures showed that the kinetic temperature of H3+ ions is equal to gas temperature and can be as low as 30 K. The obtained rotational temperature of the H3+ ions coincides very well with the evaluated kinetic temperature.