Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Superconducting magnet system of in-flight separator for a heavy ion accelerator planned in Korea

  • Kim, J.W. (Institute for Basic Science) ;
  • Kim, D.G. (Institute for Basic Science) ;
  • Jo, H.C. (Institute for Basic Science) ;
  • Choi, Y.S. (Korea Basic Science Institute) ;
  • Kim, S.H. (Changwon National University) ;
  • Sim, K.D. (Korea Electrotechnology Research Institute) ;
  • Sohn, M.H. (Korea Electrotechnology Research Institute)
  • Received : 2015.01.20
  • Accepted : 2015.03.11
  • Published : 2015.03.31
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Abstract

An in-flight fragment separator, which aims to produce and study rare isotopes, consists of superferric quadrupole triplets and $30^{\circ}$ dipole magnets to focus and bend the beams for achromatic focusing and momentum dispersion, respectively. The separator is divided into pre and main stages, and we plan to use superconducting magnets employing high-Tc superconductor (HTS) coils in the pre-separator area, where radiation heating is high. The HTS coils will be cooled by cold He gas in 20-50 K, and in the other area, superferric magnets using low-temperature superconductor (LTS) will be used at 4 K. A few LTS coils were wound and successfully tested in a LHe dewar, and the design of cryostat has been optimized. Development of the HTS coils is ongoing in collaboration with a group at KERI. An HTS coil of racetrack shape was wound and tested in a $LN_2$ bath and in a dewar with cryocooler. No degradation on critical current due to coil winding was found.

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References

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Cited by

  1. Test Results of Gas-Cooled Prototype Magnet for In-Flight Fragment Separator vol.26, pp.4, 2016, https://doi.org/10.1109/TASC.2016.2540923
  2. Thermal and Mechanical Design of a HTS Quadrupole Magnet of In-flight Fragment Separator for Rare Isotope Science Project (RISP) 2016, https://doi.org/10.1109/TASC.2016.2532364