Internship / Atmosphere re-entry radiation (m/f)

Stage Par Airbus
  • Physique
  • Les Mureaux
  • A négocier

Description

Internship / Atmosphere re-entry radiation (m/f)

Internship / Atmosphere re-entry radiation (m/f)

Airbus Defence & Space Les Mureaux

Airbus Defence and Space is a division of Airbus Group formed by combining the business activities of Cassidian, Astrium and Airbus Military. This new division is Europe's No. 1 defence and space company. Worldwide, it ranks 2nd for space and is among the top 10 defence companies. It employs some 40,000 employees, generating revenues of approximately €14 billion per year.

Airbus Group is a global leader in aeronautics, space and related services. In 2015, the Group - comprising Airbus, Airbus Defence and Space and Airbus Helicopters - generated revenues of € 64.5 billion and employed a workforce of around 136,600.

Our people work with passion and determination to make the world a more connected, safer and smarter place. Taking pride in our work, we draw on each other's expertise and experience to achieve excellence. Our diversity and teamwork culture propel us to accomplish the extraordinary - on the ground, in the sky and in space.

Description of the job

Airbus Defence and Space (Les Mureaux) is looking for a trainee for a 6-month internship.

In the context of space probe atmosphere re-entry, ASL has been required to study radiation coming from the shock layer that develops ahead of objects entering the dense layers of the atmosphere. In particular, the ROOT code was developed. This code enables the visible and UV radiation to be calculated, and is based on the NEQAIR code developed by NASA in the 1980s. The major contributors to the radiation taken into account in modelling are N2, N2+, O2, NO, CN, CO, CO+ in terms of molecules, and N, N+, O and O+ for the atoms. Most of these types result from the decay of the atmosphere at high temperature, in addition to types coming from heat protection ablation. This code is, on the one hand, based on a collisional-radiative model for the calculation of the population of the excited states, and on the other hand, a ray by ray model to calculate the radiation.

New topics of study have been addressed over the last few years, and have led us to consider what improvements could be made around the ROOT code. These topics include:

·  The study of the impact of orbital debris implies taking new atomic (Al, Ti, Mn, Mg, etc.) and molecular (C2, CH, AlO, TiO, OH, etc.) forms into account to interpret measurement results.
·  This same type of problem arises when studying spectral measurements during tests conducted on materials used as protection subject to aerothermal flow.
·  In another context, the formation of plasma during laser-matter interaction is also represented by radiation production from Al, Al+ transitions when interacting with aluminium targets.

These themes show why it is of interest to take new types into account in modelling.

As part of your internship, you will in particular focus on the radiation component of the code and you will look into how new radiation types can be taken into account: C2, AlO, OH, & CH for molecules and Al, Ti, & Mn atoms.

This internship will be available from 1st November 2017 (subject to a certain degree of flexibility).

Internships at Airbus Group

Tasks & accountabilities

Your work will be based on the following steps:

·  Understand the code from an architectural point of view
·  Understand modelling in the code, particularly the radiative transfer,
·  Carry out bibliographic research on the characteristics of the molecules (and atoms)
·  Carry out a study of atomic radiation: determining the required parameters
·  Carry out a study of molecular radiation: determining the required parameters
·  Perform an initial installation
·  Identify ideas for future work.

Required skills

You are in the final year of engineering school or a Master's degree or in the 5th year of university, specialising in chemistry materials and/or molecular physics.

Ideally, you have initial work experience.

You have knowledge in:

·  Cold plasma physics
·  Radiative transfer
·  UNIX, FORTRAN 90 environment.

You are a good team worker and you have excellent interpersonal skills.

English: Intermediate level
French: Fluent

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