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 is a global leader in aeronautics, space and related services. In 2016, it generated revenues of € 67 billion and employed a workforce of around 134,000. Airbus offers the most comprehensive range of passenger airliners from 100 to more than 600 seats. Airbus is also a European leader providing tanker, combat, transport and mission aircraft, as well as Europe's number one space enterprise and the world's second largest space business. In helicopters, Airbus provides the most efficient civil and military rotorcraft solutions worldwide.
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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