Company description

The European Synchrotron, the ESRF, is an international research centre based in Grenoble, France.

Through its innovative engineering, pioneering scientific vision and a strong commitment from its 700 staff members, the ESRF is recognised as one of the top research facilities worldwide. Its particle accelerator produces intense X-ray beams that are used by thousands of scientists each year for experiments in diverse fields such as biology, medicine, environmental sciences, cultural heritage, materials science, and physics.

Supported by 19 countries, the ESRF is an equal opportunity employer and encourages diversity.

Context & Job description

The Insertion Devices and Magnets group is in charge of the main photon sources: the undulators. These systems are typically built with a large number of permanent magnets which needs to be precisely characterized, sorted and tuned. Integrals of magnetic fields can be measured with moving wires and coils. Combining field integral measurements at many angles allows to compute the magnetic field using tomographic reconstruction. The obtained field maps would allow to better model the permanent magnet blocks used for undulator construction. The internal inhomogeneities in these blocks, as well as the spread of their magnetic moments, is a major cause of the undulator magnetic errors which needs to be corrected by a long shimming process.

The student will first commission a dedicated magnetic field tomograph and implement the reconstruction algorithm. He/she will then develop magnetic models of permanent magnets which include internal inhomogeneities. These models should allow fast computations of the magnetic field at many points, using for instance boundary elements (i.e. Green’s functions) and the Fast Multipole Method. Models based on Artificial Intelligence (AI) will also be considered.

The field models will be used for building a digital twin of an undulator assembly. Optimization methods and AI will be applied to the undulator model for improving the magnetic field corrections and the reducing the construction time.

Further information may be obtained from Gaël Le Bec (+33 4 76 88 28 68, lebec@esfr.fr)

Expected profile

• Degree allowing enrollment for a PhD (such as MSc, Master 2, Laurea or equivalent 300 ECTS) in Applied Physics or Electrical Engineering
• Proficiency in Python and object-oriented programming, skills in C++ are an asset
• Background in computer engineering and artificial intelligence is requested
• Strong general interest in magnetic systems and instrumentation is desirable
• Proficiency in English (working language at the ESRF)
• Self-motivated and self-driven

Working conditions

Your shall be enrolled in UGA (Physique) University / Doctoral School as a condition of your hiring.

Contract of two years renewable for one year.

Do you recognize yourself in this description? Apply now for your next professional adventure!

What we offer:

1. Join an innovative international research institute, with a workforce from 38 different countries
2. Collaborate with global experts to advance science and address societal challenges
3. Come and live in a vibrant city, in the heart of the Alps, and Europe's Green Capital 2022
4. Enjoy a workplace designed to support your quality of life
5. Benefit from our competitive compensation and allowancespackage, including financial support for your relocation to Grenoble

For further information on employment terms and conditions, please refer to https://www.esrf.fr/home/Jobs/what-we-offer.html

The ESRF is an equal opportunity employer and encourages applications from disabled persons.