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http://dx.doi.org/10.9714/psac.2006.8.4.030

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)
Publication Information
Progress in Superconductivity and Cryogenics / v.8, no.4, 2006 , pp. 30-33 More about this Journal
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.
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1 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
2 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
3 Florida State University, RFP #K 4986-2 for a 21 T FT-ICR Magnet, 2006
4 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
5 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
6 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   DOI   ScienceOn
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   DOI   ScienceOn
8 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   DOI   ScienceOn
9 Product Catalogue of Cryomech, New York 2006, Available from: http://www.cryomech.com
10 National Research Council, Opportunities in high magnetic field science, National Academy of Sciences, Washington, D.C., 2004. Available from: http://www.nap.edu
11 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   DOI   ScienceOn
12 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   DOI   ScienceOn
13 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
14 American Institute of Steel Construction, Chicago 2006, Available from: http://www.aisc.org
15 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   DOI   ScienceOn
16 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
17 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