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Trainee : magnetic measurements of insertion devices


SOLEIL is the French national synchrotron facility, located on the Saclay Plateau near Paris. It is a multi-disciplinary instrument and a research laboratory, whose mission is to run research programs using synchrotron radiation, to develop state-of-the-art instrumentation on the beamlines, and to make those available to the scientific community. SOLEIL, a unique tool for both academic research and industrial applications across a wide range of disciplines including physics, biology, chemistry etc., is used by over 5 000 researchers coming from France and abroad. The facility is a “public” company employing about 500 people, founded by the CNRS and the CEA, and partner of the Paris-Saclay University.

Context of the internship

SOLEIL is light source which is in operation since 2006 at Saint Aubin in the Southwest of Paris in France. The facility provides photons of high intensity covering a wide spectral range extending from Infrared to hard X-rays and serves an international community in many fields of science including physics, material science, chemistry and biology. Radiation is produced by 2.75 GeV electrons buckets crossing bending magnets and periodic magnetic devices called insertion devices made of electromagnets or in most cases of permanents magnets. The increasing demand of photon brightness has pushed most of the present Synchrotrons in the world to propose new light sources or to upgrade their own storage rings, in particular SOLEIL. SOLEIL is presently in phase of studying the feasibility to decrease the horizontal emittance with the objective to gain two orders of magnitude in photon brightness with a very compact new storage ring. The space dedicated to insertion device is decreased and to deliver wide spectral range to insertion beam lines, innovative solutions have been undertaken. The Magnetism and Insertion Device Group of SOLEIL is presently studying the capability of building multiperiodic undulator.

Activities during the internship

The selected student will join the Magnetism and Insertion Device Group and will be trained on magnetic measurements of insertion devices, the use of magnetic (RADIA code) and radiation (SRW) softwares. He/She will focus his/her work on a two periods undulators which is in phase of prototyping and a biperiodic undulator. The former consists of two independent undulators installed on mobile platform. The work will consist in checking the positioning and the reproducibility after numerous motion cycling. The second project owns the particularity that the same magnetic system produces two magnetic period which can be alternatively chosen. Theoretical developments on characteristics of radiation of these devices will complete the technical work and may drive to a three-year PhD.