Preprints
https://doi.org/10.5194/amt-2021-245
https://doi.org/10.5194/amt-2021-245

  11 Aug 2021

11 Aug 2021

Review status: this preprint is currently under review for the journal AMT.

A simulation chamber for absorption spectroscopy in planetary atmospheres

Marcel Snels1, Stefania Stefani2, Angelo Boccaccini2, David Biondi2, and Giuseppe Piccioni2 Marcel Snels et al.
  • 1National Research Council of Italy, Institute of Atmopsheric Sciences and Climate, ISAC-CNR, Via del Fosso del Cavaliere 100, 00133 Rome
  • 2Istituto di Astrofisica e Planetologia Spaziali (IAPS)- Istituto Nazionale di AstroFisica (INAF) , Via del Fosso del Cavaliere 100, 00133 Rome

Abstract. A novel simulation chamber PASSxS (Planetary Atmosphere Simulation System for Spectroscopy) has been developed for absorption measurements performed with a Fourier Transform Spectrometer (FTS) and, possibly, a cavity ring down (CRD) spectrometer, with a sample temperature ranging from 100 K up to 550 K, while the pressure of the gas can be varied from 10 mbar up to 60 bar. These temperature and pressure ranges cover a significant part of the planetary atmospheres in the solar system and the absorption chamber can thus be used to simulate planetary atmospheres of solar planets and extra solar planets with similar atmospheres. The optical absorption path for the FTS absorption measurements is 3.2 m, due to the implementation of a multipass setup inside the chamber. The FTS measurements cover a wide spectral range, from the visible to the mid-infrared with a sensitivity sufficient for medium strength absorption bands. The FTS has been used previously to measure high pressure atmospheres, including collision induced absorption bands and continuum absorption at ambient temperatures. PASSxS allows to measure the temperature dependence of collision induced bands and continuum absorption, which is important both for the modelling of planetary atmospheres as well as for fundamental processes involving collisions between molecules and atoms.

Marcel Snels et al.

Status: open (until 01 Oct 2021)

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Marcel Snels et al.

Marcel Snels et al.

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Short summary
A novel simulation chamber PASSxS (Planetary Atmosphere Simulation System for Spectroscopy) has been developed for absorption measurements with a Fourier Transform Spectrometer (FTS) and, possibly, a cavity ring down (CRD) spectrometer, with a sample temperature ranging from 100 K up to 550 K, while the pressure of the gas can be varied up to 60 bar. These temperature and pressure ranges cover a significant part of the planetary atmospheres in the solar system and, possibly, extrasolar planets.