Superferric quadrupoles for FAIR Super FRS energy buncher

• Published in: Cryogenics (Guildford) Vol. 52; no. 12; pp. 730 - 738
• Main Authors: Pal, G., Bhunia, U., Akhter, J., Nandi, C., Datta, A., Sarma, P.R., Roy, S., Bajirao, S., Bhattacharyya, S., Bhattacharyya, T.K., Dey, M.K., Mallik, C., Bhandari, R.K.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier Ltd 01.12.2012; Elsevier
• Subjects: Applied sciences; Coils; Cryogenics; Design engineering; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Helium; Iron; Links; Magnet cryostat; Magnets; Quadrupole; Quadrupoles; Quench; Refrigerating engineering. Cryogenics. Food conservation; Shields; Stress; Quadrupole; Quench; Magnet cryostat; Stress; Thermal shield; Cryogenics; Cryostat; Liquid helium; Structure; Superconducting coils
• ISSN: 0011-2275; 1879-2235
• DOI: 10.1016/j.cryogenics.2012.07.004

► Large bore superferric magnet with approx. 22tons of cold mass. ► Coupled Thermal, magnetic and structural analysis for magnet iron, coil, helium vessel and support links. ► Design of outer vacuum chamber for self weight, external pressure, magnet handling and transportation. ► Thermal design. ► Quench and loss of vacuum analysis. The quadrupole magnets for FAIR Super FRS energy buncher have large usable aperture, high magnetic pole-tip field and high gradient field quality. The iron-dominated magnets with superconducting coils have to be used in this application. The NbTi coil, laminated iron, and support structure of about 22tons is immersed in liquid helium. The 4.5K helium chamber is completely covered with a thermal shield cooled by helium at 50–80K on its outer and inner surface. The helium chamber and thermal shield is enclosed in a vacuum shell. The paper presents design details of the long quadrupole. Coupled thermal, magnetic and structural analysis was carried out to design the magnet iron, magnet coil, helium vessel and support links and ensure the required gradient field quality is achieved. The paper also presents the design of support links and outer vacuum chamber.