Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
권호 표지
DOI QR코드

DOI QR Code

Design Considerations of Cryogenic Cooling System for High Field Magnets

  • Choi, Yeon-Suk (KBSI-NHMFL Collaboration Center, Korea Basic Science Institute) ;
  • Kim, Dong-Lak (Korea Basic Science Institute) ;
  • Lee, Byoung-Seob (Korea Basic Science Institute) ;
  • Yang, Hyung-Suk (Korea Basic Science Institute) ;
  • Yoo Jong-Shin (Korea Basic Science Institute) ;
  • Painter Thomas A. (National High Magnetic Field Laboratory) ;
  • Miller John R. (Oak Ridge National Laboratory)
  • Published : 2006.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

Several crucial issues are discussed in the design of cryogenic cooling system for high field magnets. This study is mainly motivated by our ongoing program to develop a 21 T Fourier Transform Ion Cyclotron Resonance Mass Spectrometer (FT-ICR MS). The magnets of this system will be built horizontally to accomplish the requirement of user friendliness and reliability, and the replenishment of cryogen will not be necessary by a closed-loop cooling concept. The initial cool-down and safety are basically considered in this paper. The effects of the helium II volume and the gap distance of the weight load relief valve (or safety valve) on the cool-down time and temperature rising during an off-normal state are discussed. The total amount of cryogenic cooling loads and the required helium flow rate during cool-down are also estimated by a relevant heat transfer analysis. The temperatures of cryogen-free radiation shield are finally determined from the refrigeration power of a cryocooler and the total cryogenic loads.

Keywords

References

  1. National Research Council, Opportunities in high magnetic field science, National Academy of Sciences, Washington, D.C., 2004. Available from: http://www.nap.edu
  2. I. Dixon, W. Markiewicz, W. Brey, and K. Shetty, 'Performance of the ultra wide bore 900 MHz NMR magnet at the National High Magnetic Field Laboratory,' IEEE Trans. Appl. Supercond., vol. 15, pp. 1334-1337, 2005 https://doi.org/10.1109/TASC.2005.849588
  3. T. Kiyoshi, M. Yoshikawa, and A.Sato, 'Operation of a 920-MHz high-resolution NMR magnet at TML,' IEEE Trans. Appl. Supercond., vol. 13, pp. 1391-1395, 2003 https://doi.org/10.1109/TASC.2003.812675
  4. T. Painter, W. Markiewicz, J. Miller, S. Bole, I. Dixon, K. Cantrell, S. Kenney, A. Trowell, D. L. Kim, B. S. Lee, Y. S. Choi, H. S. Kim, C. Hendrickson, and A. Marshall, 'Requirements and conceptual superconducting magnet design for a 21 T Fourier Transform Ion Cyclotron Resonance Mass Spectrometer,' IEEE Trans. Appl. Supercond., vol. 16, pp. 945-948, 2006 https://doi.org/10.1109/TASC.2005.869678
  5. Y. S. Choi, D. L. Kim, B. S. Lee, H. S. Yang, T. Painter, and J. Miller, 'Close-cycled cryogenic system by cryocooler for 21 T FT-ICR magnets,' Cryogenics, submitted for publication
  6. A. Sato, S. Nimori, T. Numazawa, M. Maeda, F. Matsumoto, H. Nagai, M. Takahashi, T. Kuriyama, T. Ito, and T. Okamura, 'Development of a high field superconducting magnet cooled by a 2 K cryocooler (I) - magnet and cooling system,' Advances in Cryogenic Engineering, Vol 49, pp. 734-741, 2004
  7. K. Ng, H. Xue, and J. Wang, 'Experimental and numerical study on a miniature Joule-Thomson cooler for steady-state characteristics, Int. J. Heat and Mass Transfer, Vol. 45, pp. 609-618, 2002 https://doi.org/10.1016/S0017-9310(01)00165-X
  8. F. Matsumoto, A. Sato, T. Kiyoshi, H. Nagai, H. Wada, S. Ito, T. Miki, M. Hamada, Y. Kawate, and S. Fukui, 'Testing of superfluid-cooled 920 MHz NMR cryostat,' Advances in Cryogenic Engineering, Vol 47, pp. 383-390, 2002
  9. G. Mardion, G. Claudet, and P. Seyfert, 'Practical data on steady state heat transport in superfluid helium at atmospheric pressure,' Cryogenics, vol. 19, pp. 45-47, 1979 https://doi.org/10.1016/0011-2275(79)90109-7
  10. A. Sato, M. Maeda, and Y. Kamioka, 'Steady state heat transport in a channel containing He II at high pressure up to 1.5 MPa,' Advances in Cryogenic Engineering, Vol 49, pp. 999-1006, 2004
  11. Florida State University, RFP #K 4986-2 for a 21 T FT-ICR Magnet, 2006
  12. B. S. Lee, D. L. Kim, Y. S. Choi, and H. S. Yang, 'Load release method of cryostat internal supporting system for horizontal superconducting magnet,' Proceeding of KSME Spring Annual Conference, 2006
  13. J. R. Miller, G. E. Miller, K. R. Cantrell, and V. J. Toplosky, 'Design of support structure to suppress vibrations of the magnet vessel in the 900-MHz NMR cryostat,' Advances in Cryogenic Engineering, Vol 49, pp. 471-478, 2004
  14. American Institute of Steel Construction, Chicago 2006, Available from: http://www.aisc.org
  15. H. Nagai, A. Sato, T. Kiyoshi, F. Matsumoto, H. Wada, S. Ito, T. Miki, M. Yoshikawa, Y. Kawate, and S. Fukui, 'Development and testing of superfluid-cooled 900 MHz NMR magnet,' Cryogenics, vol. 41, pp. 623-630, 2001 https://doi.org/10.1016/S0011-2275(01)00134-5
  16. Product Catalogue of Cryomech, New York 2006, Available from: http://www.cryomech.com
  17. Y. S. Choi, T. Painter, D. L. Kim, B. S. Lee, H. S. Yang, H. Weijers, G. Miller, and J. Miller, 'Helium liquefaction by cryocooler for high-field magnets cooling,' In: International Cryocooler Conference 2006, Annapolis, MD, in press