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Reference : UMR5266-EDGRAU-002
Workplace : ST MARTIN D HERES
Date of publication : Monday, February 10, 2020
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 4 May 2020
Proportion of work : Full time
Remuneration : Gross salary between 2648€ à 3054€ depending on previous accomplishements
Desired level of education : PhD
Experience required : Indifferent
In transmission electron microscopy acquiring a stack of diffraction patterns by moving the beam in a two-dimensional scan produces a four-dimensional dataset that contains the information related to all the overlapping grains, the through thickness boundaries as well as the embedded second phase particles. The coupling of such Scanning Precession Electron Diffraction (SPED) technique with sample tilts and tomographic post-processing routines is expected to enable the reconstruction of 3D phase and orientation maps and consequently to provide access to the interfaces or interphases geometric and crystallographic properties
The objective of this project is to finalize the development of such a tool by (i) optimizing the existing data acquisition and processing routes and (ii) constructing the complete set of user-friendly routines that will permit the 3D crystallographic characters of the sample to be investigated. A dedicated approach is used to extract a signal that by-passes the intensity modulations due to dynamic effects and fulfills the projection requirement.
The candidate will be in charge of
- the establishment of a workflow allowing for tomographic reconstruction of 3D grain orientation maps from a tilt series of 4D scanning precession electron diffraction patterns.
- the development of projection alignment, intensity normalization and 3D grain reconstruction procedures. The latter will be based on iterative tomographic reconstruction schemes and make use of concepts previously developed for X-ray datasets.
-insuring the portability and the user friendliness of the resulting tools
We are looking for a highly motivated Post‐Doc with a strong background in physics, materials science or scientific computing. The candidate should have experience with and great interest in digital image processing, inverse problems, programming, multidimensional data analysis. Besides excellent records, very good spoken and written English will be a must. French language skills are welcome but not obligatory. The candidate should have good communication skills and team spirit.
The research will be conducted in Grenoble in the frame of a collaboration between two complementary materials science laboratories: SIMAP (E. Rauch, TEM orientation microscopy, development of an automated tool for orientation mapping in TEM named ASTAR) and MATEIS (W. Ludwig, X-ray orientation microscopy, development of the Diffraction Contrast Tomography tool).
Constraints and risks
Applications should include a motivation letter, a detailed scientific CV with a list of publications, support letters of his/her professors and details about courses / classes / grades
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