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International audience; The superconducting fragment separator (Super-FRS) of facility for antiproton and ion research (FAIR) located in Darmstadt, Germany, requires three branched superferric dipoles which are more complex than the 21 standard dipoles already designed by Commissariat l'Energie Atomique et aux nergies alternatives (CEA). The 50-ton branched dipoles allow the beam of particles to be directed towards the different branches of the separator. The final design proposed by CEA Paris-Saclay for these dipoles integrates features required for the installation of the Y-shaped vacuum chamber which have an impact on the magnetic and mechanical design of the magnet. The coil casing design was modified and the cold-to-warm supports had to be reorganized to contain the Laplace forces acting on the weakened mechanical structure. Cryogenic experiments have been conducted to characterize the behavior of the active thermosiphon concept and to validate the cryogenic design proposed last year. We present in this paper the final design for the FAIR Super-FRS branched dipole magnets along with the design simulation results (magnetic, cryogenic, and mechanical analyses) and the main results of the active thermosiphon tests conducted recently.

International audience; CEA has the responsibility of the design studies for the superferric 1.6 T dipole magnets of the Superconducting FRagment Separator (Super-FRS) which is part of the Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany. After completing the study for the 21 superferric Super-FRS standard dipole magnets, CEA is currently analysing conceptual solutions for the three superferric branched dipole magnets. Branched dipole magnets are necessary to allow the separated particles to be directed along each of the three branches of the separator. The branched dipoles will keep most of the features incorporated in the standard dipole magnet design but they will have increased complexity to make them compatible with the vacuum chamber layout at the branches locations (Y-shape). The magnetic design of the yoke will be slightly modified whereas a new cryogenic design is required. This paper presents the design concepts envisioned for the FAIR Super-FRS branched dipole magnets and focuses on preliminary electromagnetic and electro-mechanical simulation results. Concepts for the mechanical and cryogenic designs are also described.

International audience; The Super conducting FRagment Separator (Super-FRS) is a part of Facility for Antiproton and Ion Research, a new international accelerator facility for the research with antiprotons and ions to be built in Darmstadt, Germany. The Super-FRS includes 24 super ferric H-type dipole magnets with trapezoidal structure and large aperture, deflection radius of 12.5 m, magnetic field of up to 1.6 T, and effective length of more than 2 m for bending ion beams (with a rigidity from 2 to 20 Tm). Two Nb-Ti coils will be located inside the cryostat in order to be cooled with liquid He, but the yoke will remain at room temperature (RT). A chamfered-pole was designed to meet the required field homogeneity. This paper reports on the status of such a dipole.