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Internship: Beam-Based Measurement Stud or Stability Study for SOLEIL II

SOLEIL is the French national synchrotron facility, located on the Saclay Plateau near Paris. It is a multidisciplinary instrument and research laboratory whose mission is to conduct research using synchrotron radiation, to develop cutting edge instrumentation on the beamlines, and to make these developments available to the scientific community. SOLEIL synchrotron, a unique tool for both academic research and industrial applications across a wide range of disciplines including physics, biology, chemistry etc., opened in 2008. It is used annually by thousands of researchers from France and abroad. SOLEIL is based on a synchrotron source that is state-of-the-art both in terms of brilliance and stability. This large-scale facility, a partner of the Université Paris Saclay, is a “publicly owned” private company, founded by the CNRS and the CEA.

In the context of SOLEIL's ongoing upgrade towards a fourth-generation light source accelerator facility (SOLEIL II), a new storage ring will replace the current one. We propose a 6-month MASTER internship study on one of the following two topics:

- Transverse stability study for SOLEIL II: The delivery of very high brilliance photon beams must be associated with extreme high stability of the electron beams, typically 50 nm RMS. The aim of this internship is to simulate static and dynamic noise sources, including all known sources and the beam environment (site vibration, power supply noise, chamber bandwidths, girder amplification factors using the prototype girder received in autumn 2023, orbit feedback, etc.) to finalize equipment specifications. These numerical studies will use Matlab/accelerator toolbox and the elegant code.

- Fast beam measurement methods for SOLEIL II: This exploratory study will be focused on fast electron beam measurement techniques to reduce the acquisition times of response matrices and beam-based alignment by several factors. Several methods have been proposed by the community using fast data streams from beam position monitors. These studies, using our Matlab-based simulation tools, could eventually lead to proof-of-concept and experimental studies using the brandnew fast feedback architecture and future power electronics for corrector power supplies.

The internship may eventually lead to a PhD thesis if the student demonstrates the required qualities and motivation.

The student is expected to have a good understanding of the accelerator physics and to be comfortable using digital simulation tools. He or she will work in the Accelerator Physics group, which is in the Accelerators and Engineering Division of SOLEIL. The group is composed of 6 staff members and three postdocs. The necessary computing resources (a PC, an account on the computing server etc.) shall be provided to the student.

For more information, please contact Laurent S. Nadolski (tutor of this internship) at