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Portal > Offres > Offre UPR3079-LEIDEL-001 - Chercheur(se) débutant(e) en spectroscopie IR : développement d'une technique de caractérisation locale de l'émittance spectrale pour la détermination des propriétés optiques des milieux finement divisés (H/F)

Researcher in IR spectroscopy: development of a technique for local characterization of spectral emissivity for the determination of optical properties of finely dispersed media

This offer is available in the following languages:
Français - Anglais

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General information

Reference : UPR3079-LEIDEL-001
Workplace : ORLEANS
Date of publication : Tuesday, June 23, 2020
Type of Contract : FTC Scientist
Contract Period : 6 months
Expected date of employment : 1 September 2020
Proportion of work : Full time
Remuneration : ranging from 2648 to 3768 € monthly depending on experience
Desired level of education : PhD
Experience required : 1 to 4 years

Missions

At the CNRS, at the CEMHTI laboratory located in Orleans, the "Optics and Thermal Radiation” (ORT) team is recruiting a researcher to work on the development of a specific instrumentation, integrating a microscope coupled to a Fourier transform infrared spectrometer, for the characterization of finely dispersed media.

He/she will work on the validation of a methodology for measuring infrared emission spectra and will propose a protocol for determining the uncertainties associated with the experiments. This development will enable the acquisition of data complementary to specular reflection measurements and will thus improve the robustness of the extraction of optical properties from heterogeneous media that can be processed within the general framework of the effective medium theories.

The researcher will also participate in the realization of spectral emissivity measurements in the framework of industrial contracts.

Activities

-To develop a new experimental device for the local measurement of spectral emissivity.
-To analyze the measurement uncertainties using the method described in the GUM (Guide to the Expression of Uncertainty in Measurement)
-To Prepare and shape samples
-Characterization by IR spectroscopy as a function of temperature
-To Simulate infrared spectra and to determine of optical properties using spectra processing software
-To valorize its results through publications and participation in congresses

Skills

-Ph.D. in Physics and expertise in infrared spectroscopy.
-Experience in performing temperature-dependent thermal emission measurements will be highly valued.
-Skills in experimental methodology and in techniques for evaluating the uncertainties of measured quantities as described in the GUM.
-The ability to extract optical indices using dielectric function models from experimental data and knowledge of computer tools for spectra processing, such as the FOCUS software, will be highly appreciated.
-Autonomy and good teamwork skills.
-Experience in terms of scientific publication and presentation in international congresses will be valued.
- The candidate has to be fluent in English.

Work Context

The CEMHTI is a research unit of the CNRS located on two sites (High Temperature and Cyclotron) with a staff of about 100 people. The laboratory develops expertise and original tools on a national and international level to study in particular the physico-chemical properties of materials in extreme conditions.
The researcher will join the "Optics and Thermal Radiation (ORT)" team based at the high-temperature site and will be attached to the "Radiative Quantities and Transport Properties in Materials (GRPTM)" theme

Constraints and risks

Mobility between the different project partners may be required.

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