L. Croizé

Office National d'Études et de Recherches Aérospatiales

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Sébastien Payan

Laboratoire atmosphères, milieux, observations spatiales

Y. Zanella

CEA Paris-Saclay

D. Doizi

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

V. Dauvois

CEA Paris-Saclay

J.L. Roujou

Université Paris-Saclay

Nathalie Huret

Centre National de la Recherche Scientifique

A. Pailloux

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

E. Le Coarer

Institut de Planétologie et d'Astrophysique de Grenoble

Silvère Gousset

Université Grenoble Alpes

Jérôme Bureau

Sorbonne Université

Cooperative Institutions

Centre National de la Recherche Scientifique

Université Paris-Saclay

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

CEA Paris-Saclay

Sorbonne Université

Direction des énergies

Université Grenoble Alpes

Office National d'Études et de Recherches Aérospatiales

Institut polytechnique de Grenoble

Université de Versailles Saint-Quentin-en-Yvelines

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Simulation of the vibrational chemistry and the infrared signature induced by a Sprite streamer in the mesosphere

AGU Fall Meeting Abstracts (2017)

Frédéric Romand Sébastien Payan L. Croizé

Sprite (computer graphics)

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Feasibility of high altitudes luminous events study by infrared spectro-imagery embedded in a stratospheric balloon

L. Croizé Sébastien Payan Jérôme Bureau Fabrice Duruisseau Nathalie Huret

10.1109/whispers.2013.8080670

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NANOCARB-21: a miniature Fourier-transform spectro-imaging concept for a daily monitoring of greenhouse gas concentration on the Earth surface

International Conference on Space Optics — ICSO 2020 (2017)

Silvère Gousset Nicolas Guérineau L. Croizé E. Le Coarer T. Laveille

Earth's positive radiative forcing is significantly accelerated by massive anthropogenic emissions of greenhouse gases, like carbon dioxide and methane [1]. Since 2014 the concentration of CO2 exceeds 400 parts per million (ppm), and the concentration of CH4 climbs up to 1900 parts per billion (ppb) [2] with a constant annual increase.

Forcing (mathematics)

Carbon fibers

Greenhouse effect

10.1117/12.2296102

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Potentialities of optical on line techniques: Application to the study of thermochemical cycles for hydrogen production

D. Doizi B. Larousse A. Pailloux V. Dauvois J.L. Roujou

Optical on line techniques enable non intrusive physical measurements in harsh environments (high temperature, high pressure, radioactivity,...). Optical absorption spectrometries such as UV-Visible or FTIR spectrometries have been successfully used to study reaction kinetics in thermochemical cycles for example. To achieve very low detection limits often required in studies relevant with fission product release in nuclear reactor studies or explosion risks in waste disposals, cavity ring down spectroscopy is a promising on line optical technique.

Nuclear fission product

Line (geometry)

Production line

10.1109/animma.2009.5503680

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Possibilities for the study of the NLTE effect on atmospheric CO<inf>2</inf> spectral signatures induced by a blue jet using an infrared spectro-imager embedded in a stratospheric balloon

L. Croizé Sébastien Payan Jérôme Bureau Fabrice Duruisseau Nathalie Huret

HALESIS (High Altitude Luminous Events Studied by Infrared Spectro-imagery) is an innovative project based on hyperspectral imagery. The purpose of this experience is to measure the atmospheric perturbation in the minutes following the occurrence of Transient Luminous Events (TLEs) from a stratospheric balloon in the altitude range of 20 to 40 km. The first part of the study has been dedicated to establish the project feasibility. To do that, we have simulated spectral perturbations induced by an isolated blue jet. Simulations have been performed using the line by line radiative transfer model LBLRM taking into account the Non Local Thermodynamic Equilibrium. The case of the estimation of the CO ₂ infrared signature that could be the result of a single blue jet occurrence is presented. Then, the estimated spectral signatures have been confronted with the technical capabilities of different kinds of hyperspectral imagers. The study has demonstrated the feasibility of the project, but it has also pointed to the challenges to build perfectly adapted instrument.

Spectral signature

10.1109/whispers.2014.8077567

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ImSPOC: A Novel Compact Hyperspectral Camera for the Monitoring of Atmospheric Gases

IGARSS 2022 - 2022 IEEE International Geoscience and Remote Sensing Symposium (2022)

Silvère Gousset Daniele Picone E. Le Coarer J.M. Rodrigo Didier Voisin

There is an increasing industrial and scientific demand for large scale monitoring of gas concentration, e.g., to abide with constraints on pollutants for environmental safety. This paper aims to show the potential of the very recent ImSPOC technology for gas monitoring. We present the ImSPOC operating principle, some of the developed prototypes and two illustrative examples in the monitoring of methane and carbon dioxide in controlled environments.

Carbon dioxide sensor

Environmental Monitoring

10.1109/igarss46834.2022.9884258

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Deux exemples d'applications de la spectroscopie diode laser haute performance.

HAL (Le Centre pour la Communication Scientifique Directe) (2006)

D. Mondelain L. Croizé A. W. Mantz C. Camy‐Peyret

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Pollutants monitoring in the sub - THz frequency domain

M. Guinet L. Croizé Arnaud Cuisset Francis Hindle R. Bocquet

A THz spectrometer based onto commercially available blocks has been implemented to identify and quantify gas mixtures at trace levels. Specifications of the prototype in a context of gas trace analysis have been addressed by spectroscopic investigations onto SO ₂ .

TRACE (psycholinguistics)

Trace gas

10.1109/irmmw-thz.2012.6380320

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Hydrogen production by the Cu–Cl thermochemical cycle: Investigation of the key step of hydrolysing CuCl2 to Cu2OCl2 and HCl using a spray reactor☆

International Journal of Hydrogen Energy (2009)

Magali Ferrandon M. A. Lewis David F. Tatterson Adam F. Gross D. Doizi

Thermochemical cycle

Nebulizer

10.1016/j.ijhydene.2009.09.086

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