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Science

If a placement corresponds to your profile and requirements, please email directly the placement supervisor (as soon as possible). Please enclose your CV and a covering letter, quoting the appropriate reference.

The Stress analyzer SALSA uses neutrons to determine stress-fields within engineering components with sub-millimetre resolution. The samples can be made of metals or ceramics can have dimensions from millimetres to metres and complex shapes. Precise orientation and positioning of the very diversive samples is vital for neutron measurements. A machine vision system consisting of 4 cameras and a National-Instruments (NI) interface is installed on the instrument. NI provides a library of functions that shall be embedded into a user friendly interface and extended by specific functionalities required by the applications of the SALSA instrument.

 

Activities of the trainee

Embedding the functions provided by the National-Instruments library into a user interface requires windows programming and advanced experience in C++ programming.

 

Level required

4 year university studies in programming

 

Language skill

As an international research centre, we are particularly keen to ensure that we also attract applicants from outside France. You must be able to communicate in English or in French.

 

Notes

This post is an internship with a maximum duration of 6months

 

Please send your application directly to the supervisor:

Thilo Pirling, email : pirling@ill.eu

Shear is a widespread phenomenon observed in both nature and technology, and can significantly alter the structure, function and performance of biological and artificial systems. An illustrative example of its significance is the reduction of friction through the application of lubricants and surface coatings, critical to reduce energy consumption and increase the lifetime of almost any machine with moving parts. To understand, control and utilize the effects of shear, it becomes necessary to analyze its impact on the structure and function of the sheared interfaces on a molecular scale. For this purpose, a project to combine neutron reflectometry (NR) and infrared spectroscopy to follow shear-induced interfacial processes with time resolution down to about 10 ms has recently started at ILL.

The student assigned to this project will be in charge of preparing semi-dilute polystyrene (PS) solutions in the good solvent tetrachloroethylene. Subsequently, the student will conduct rheological measurements using the Anton Paar 702e Space MultiDrive rheometer. An array of PS concentrations will be systematically studied to elucidate their viscoelastic properties by measuring the storage G’ (ω) and loss G’’(ω) moduli against the angular frequency ω of the applied shear rate and determine the longest relaxation time. Besides, measurements of the viscosity as a function of the shear rate will be performed to simulate the NR experiments. This preliminary assessment will allow to check the operating windows of the cone-plate geometry before performing the real NR experiments.

 

Activities of the trainee

(1) Preparation of semi-dilute PS solutions in tetrachloroethylene at different concentrations.

(2) Characterization of the longest relaxation time and the operating windows of the cone-plate geometry using the Anton Paar 702e Space MultiDrive rheometer available in the PSCM.

(3) Analysis and interpretation of the results obtained to identify the optimal PS concentration for the NR experiments.

 

 

Level required

4 or 5 year university studies in Physical Chemistry

 

Language skills

As an international research centre, we are particularly keen to ensure that we also attract applicants from outside France. You must be able to communicate in English or in French.

 

Notes

This post is an internship with a maximum duration of 6months

 

Please send your application directly to the supervisor:

Javier Carrascosa, email : carrascosa-tejedor@ill.fr

Fission is the mechanism that can be used to populate nuclei far from stability and study their structure. By detecting gamma rays from excited fission fragments and analyzing multiple gamma-ray coincidences, nuclear level scheme can be reconstructed. Different campaigns took place in recent years at ILL, using n-induced fission and different experimental setups at the FIPPS instrument. The analysis of those data is of importance both for nuclear structure and for the instrument performance evaluation.

 

 

Activities of the trainee

The internship student will evaluate the performance of FIPPS in different fission campaigns. He/She will analyze multiple gamma-ray coincidence data for reconstructing level schemes in neutron-rich nuclei.

 

Level required

5 year university studies in Physics

 

Language skills

As an international research centre, we are particularly keen to ensure that we also attract applicants from outside France. You must be able to communicate in English or in French.

 

Notes

This post is an internship with a maximum duration of 6months

 

Please send your application directly to the supervisor:

Caterina Michelagnoli, email : michelagnolic@ill.fr