Final Design of the Superferric Branched Dipoles for the FAIR Super-FRS

• Published in: IEEE transactions on applied superconductivity Vol. 29; no. 5; pp. 1 - 5
• Main Authors: Madur, Arnaud, Quettier, Lionel, Allain, Herve, Graffin, Patrick, Reymond, Hugo, Massinger, Michael, Mueller, Hans, Eun Jung Cho, Winkler, Martin, Sugita, Kei
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.08.2019; The Institute of Electrical and Electronics Engineers, Inc. (IEEE); Institute of Electrical and Electronics Engineers
• Subjects: Accelerator Physics; Alternative energy sources; Antiparticles; Antiprotons; Coils; Design modifications; Dipoles; Force; magnetic field quality; Magnetic separation; Magnetomechanical effects; Magnets; Physics; Separators; Steel; Stress; superconducting dipole; Superconducting magnets; Superferric magnet; thermosiphon; Vacuum chambers; magnetic design; Magnetomechanical effects; Force; superconducting fragment separator; ion research; active thermosiphon tests; cryogenic analysis; Laplace forces; branched superferric dipoles; FAIR Super-FRS; superferric branched dipoles; Y-shaped vacuum chamber; magnetic field quality; accelerator magnets; cryogenic design; antiproton; cryogenics; Superconducting magnets; CEA Paris-Saclay; dipole magnets; Steel; superconducting coils; Stress; Standards; beam handling techniques; mechanical design; magnetic analyses; Magnetic separation; superconducting dipole; Superferric magnet; thermosiphon; coil casing design; cryostats; mechanical analyses
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2019.2895514

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.