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Portail > Offres > Offre UMR7326-ANAMEK-037 - H/F Chercheur en Optique Active pour l'Instrumentation Spatiale

H/F Researcher in Active Optics for Space Instrumentation

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

Date Limite Candidature : lundi 11 juillet 2022

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General information

Reference : UMR7326-ANAMEK-037
Workplace : MARSEILLE 13
Date of publication : Monday, June 20, 2022
Type of Contract : FTC Scientist
Contract Period : 18 months
Expected date of employment : 1 September 2022
Proportion of work : Full time
Remuneration : The gross monthly salary is € 2 728,25 to € 4 323,97 depending on the candidate's experience.
Desired level of education : PhD
Experience required : Indifferent

Missions

The Marseille Astrophysics Laboratory (LAM), Thales Alenia Space (TAS) and Thales SESO (TSESO) have been collaborating on studies and R&D for space active optics for over 15 years.
Since the mid-2010s, the development of a first prototype of an active mirror for space (MADRAS), in collaboration between the LAM, TAS and TSESO, then the funding by the CNES of an optimized model have made it possible to reach a TRL7 level for this active mirror. It was recently qualified for space use and tested on a “scale 1” active telescope demonstrator called TANGO2. This demonstrator fully validates the technologies of an active space telescope dedicated to future THR (Very High Resolution) missions.
More recently (2018-2020), TAS and the LAM, as well as three other European partners, carried out on behalf of the European Space Agency (ESA) a general programmatic study (GSP) entitled "Active Optics in Deployable Systems for Future Earth Observation and Science Missions”. This system study had two application cases: a high-resolution observation system in geostationary orbit and a "science case": an on-board coronograph at the focus of a LUVOIR-type telescope. This activity made it possible to draft technical solutions by clearly identifying the technological complexities and the necessary gains in technological maturity on certain subsystems (TRL gaps). Technology roadmaps were presented to ESA on the most critical points: segmented mirrors, actuators, metrology, deformable mirrors. Following these roadmap proposals, ESA plans to soon launch studies for Technology Development Element (TDE).
From the two cases mentioned (MADRAS/TANGO and GSP Active Optics), we can see that the “deformable active mirror” technological brick is crucial for future large space telescopes. However, the existing concepts must be developed very significantly, in particular to adapt them to the segmentation of a large primary mirror and to optimize the entire [Primary Mirror - Deformable Mirror] system. The solutions envisaged, as mentioned in the GSP Active Optics, would be based on active mirrors composed of segments which are themselves deformable and orientable in space.

Activities

PROGRAM OF WORK AT LAM:
• T2 - Bibliography study: inventory and analysis of existing principles/solutions, as well as more innovative ones.
• T5 - Proposal of innovative architectures to best meet the defined requirements :
o Coupled optimization of the primary mirror and the deformable active mirror?
• T6 - Monitoring and supervision of a phase of mechanical analyzes carried out by the TAS and LAM teams :
o Space environment, behavior at launch, ...
• T7 - Fine modeling of optical performance expected for the most promising architectures and prioritization of solutions.
WORK PROGRAM AT THALES:
• T1 - Understanding and prioritization of mission needs, in both cases of GeoHR and Science applications
(in conjunction with the LAM for the definition of needs for Science missions).
• T3 - Detailed definition of optical requirements in both GeoHR and Science application cases :
o Dimension of the equipment and its useful surface, correction frequency, modes to be corrected (dynamics, resolution), positioning in the optical beam, ...
• T4 - Further analysis of the correction modes and associated performances, in particular in relation to the modes of deformation of a large segmented primary mirror :
o Impact of correction modes, high spatial frequencies, and segmentation on raw MTF and MTF after image deconvolution.
• T6 - Monitoring and supervision of a phase of mechanical analyzes carried out by the TAS and LAM teams :
o Space environment, behavior at launch, ...
• T8 - Definition of a functional mockup and a preliminary test plan for the chosen solution.

Skills

Skills in instrumentation, Optics, signal processing, python, Matlab, C++

Work Context

This recruitment offer is part of the France Relance plan on a collaboration project between the Marseille Astrophysics Laboratory (LAM) and Thales-Alenia-Space in Cannes. The candidate will only be definitively recruited if the project receives a favorable opinion from DRARI/DGDI/FSD (if applicable), depending in part on the quality of the application.
It is expected that the candidate will spend 80% of his/her time at Thales and 20% in the laboratory. Weekly meetings involving LAM, Thales-Alenia-Space, and possibly Thales-SESO will be organized to ensure the monitoring and consistency of the work.
The candidate may also be required to interact with other historical partners of the laboratory on this theme (ONERA, Space Telescope Science Institute in Baltimore) and possibly to present their work to space agencies (CNES, ESA).

Constraints and risks

Travel between Cannes and Marseille.

Additional Information

Applicants should submit a single pdf file with :
• a curriculum vitae and a list of publications;
• a one-page cover letter;
• the contact details of up to three reference persons (no need for the reference letters at this stage);
Email : marc.ferrari@lam.fr & herve.benard@thalesaleniaspace.com

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