Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Electromagnetic design study of a 7 T 320 mm high-temperature superconducting MRI magnet with multi-width technique incorporated

  • Received : 2021.11.19
  • Accepted : 2021.12.21
  • Published : 2021.12.31
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Abstract

Superconducting magnets have paved the way for opening new horizons in designing an electromagnet of a high field magnetic resonance imaging (MRI) device. In the first phase of the superconducting MRI magnet era, low-temperature superconductor (LTS) has played a key role in constructing the main magnet of an MRI device. The highest magnetic resonance (MR) field of 11.7 T was indeed reached using LTS, which is generated by the well-known Iseult project. However, as the limit of current carrying capacity and mechanical robustness under a high field environment is revealed, it is widely believed that commercial LTS wires would be challenging to manufacture a high field (>10 T) MRI magnet. As a result, high-temperature superconductor together with the conducting cooling approach has been spotlighted as a promising alternative to the conventional LTS. In 2020, the Korean government launched a national project to develop an HTS magnet for a high field MRI magnet as an extent of this interest. We have performed a design study of a 7 T 320 mm winding bore HTS MRI magnet, which may be the ultimate goal of this project. Thus, in this paper, design study results are provided. Electromagnetic design and analysis were performed considering the requirements of central magnetic field and spatial field uniformity.

Keywords

Acknowledgement

This work was supported by the Korea Medical Device Development Fund grant funded by the Korea government (the Ministry of Science and ICT, the Ministry of Trade, Industry and Energy, the Ministry of Health & Welfare, the Ministry of Food and Drug Safety) (Project Number: 1711138068, KMDF_PR_20200901_0063).

References

  1. T. Cosmus and M. Parizh, "Advances in whole-body MRI magnets," IEEE Trans. Appl. Supercond., vol. 21, no. 3, pp. 2104-2109, 2011. https://doi.org/10.1109/TASC.2010.2084981
  2. Y. Iwasa, J. Bascunan, S. Hahn, M. Tomita, and W. Yao, "High-temperature superconducting magnets for NMR and MRI: R&D activities at the MIT francis bitter magnet laboratory," IEEE Trans. Appl. Supercond., vol. 20, no. 3, pp. 718-721, 2010. https://doi.org/10.1109/TASC.2010.2040073
  3. S. Hahn, D. Park, K. Kim, J. Bascunan, and Y. Iwasa, "No-insulation (NI) winding technique for premature-quench-free NbTi MRI magnets," IEEE Trans. Appl. Supercond., vol. 22, no. 3, pp. 4501004, 2012. https://doi.org/10.1109/TASC.2011.2178970
  4. X. Wang, S. Hahn, Y. Kim, J. Bascunan, J. Voccio, H. Lee, and Y. Iwasa, "Turn-to-turn contact characteristics for an equivalent circuit model of no-insulation ReBCO pancake coil," Supercond. Sci. Technol., vol. 26, pp. 035012, 2013. https://doi.org/10.1088/0953-2048/26/3/035012
  5. Y. Choi, S. Hahn, J. Song, D. Yang, and H. Lee, "Partial insulation of GdBCO single pancake coils for protection-free HTS power applications," Supercond. Sci. Technol., vol. 24, pp. 125013, 2011. https://doi.org/10.1088/0953-2048/24/12/125013
  6. Y. Choi, D. Kim, and S. Hahn, "Progress on the development of a 5 T HTS insert magnet for GHz class NMR applications," IEEE Trans. Appl. Supercond., vol. 21, no. 3, pp. 1644-1648, 2011. https://doi.org/10.1109/TASC.2010.2101035
  7. Y. Kim, S. Hahn, K. Kim, O. Kwon, and H. Lee, "Investigation of HTS racetrack coil without turn-to-turn insulation for superconducting rotating machines," IEEE Trans. Appl. Supercond., vol. 22, no. 3, pp. 5200604, 2012. https://doi.org/10.1109/TASC.2011.2181931
  8. S. Choi, H. Jo, Y. Hwang, S. Hahn, and T. Ko, "A study on the no insulation winding method of the HTS coil," IEEE Trans. Appl. Supercond., vol. 22, no. 3, pp. 4904604, 2012. https://doi.org/10.1109/TASC.2012.2184515
  9. Y. Choi, K. Kim, O. Kwon, J. Kang, T. Ko, and H. Lee, "The effects of partial insulation winding on the charge-discharge rate and magnetic field loss phenomena of GdBCO coated conductor coils," Supercond. Sci. Technol., vol. 25, pp. 105001, 2012. https://doi.org/10.1088/0953-2048/25/10/105001
  10. S. Kim, A. Saito, T. Kaneko, J. Joo, J. Jo, Y. Han, and H. Jeong, "The characteristics of the normal-zone propagation of the HTS coils with inserted Cu tape instead of electrical insulation," IEEE Trans. Appl. Supercond., vol. 22, no. 3, pp. 4701504, 2012. https://doi.org/10.1109/TASC.2011.2174559
  11. S. Hahn, Y. Kim, J. Ling, J. Voccio, D. Park, J. Bascunan, H. Shin, H. Lee, and Y. Iwasa, "No-Insulation coil under time-varying condition: magnetic coupling with external coil," IEEE Trans. Appl. Supercond., vol. 23, no. 3, pp. 4601705, 2012. https://doi.org/10.1109/TASC.2013.2240756
  12. S. Yoon, K. Cheon, H. Lee, S. Moon, I. Ham, Y. Kim, S. Park, H. Joo, K. Choi, and G. Hong, "Fabrication and characterization of 3-T/102-mm RT bore magnet using 2nd generation (2G) HTS wire with conducting cooling method," IEEE Trans. Appl. Supercond., vol. 23, no. 3, pp. 4600604, 2012. https://doi.org/10.1109/TASC.2012.2233534
  13. S. Kim, T. Kaneko, H. Kajikawa, J. Joo, J. Jo, Y. Han, and H. Jeong, "The transient stability of HTS coils with and without the insulation and with the insulation being replaced by brass tape," IEEE Trans. Appl. Supercond., vol. 23, no. 3, pp. 7100204, 2012. https://doi.org/10.1109/TASC.2012.2234492
  14. J. Kim, Y. Kim, S. Yoon, K. Shin, J. Lee, J. Jung, J. Lee, J. Kim, D. Kim, J. Yoo, H. Lee, S. Moon, and S. Hahn, "Design, construction, and operation of an 18 T 70 mm no-insulation (RE)Ba2Cu3O7-x magnet for an axion haloscope experiment," Rev. Sci. Instruments., vol. 91, no. 2, pp. 023314, 2020. https://doi.org/10.1063/1.5124432
  15. M. Daibo, S. Fujita, M. Haraguchi, Y. Iijima, M. Itho, and T. Saitoh, "Development of a 5T 2G HTS magnet with a 20-cm-diameter bore," IEEE Trans. Appl. Supercond., vol. 23, no. 3, pp. 4602004, 2013. https://doi.org/10.1109/TASC.2013.2246758
  16. S. Hahn, J. Bascunan, E. Bobrov, W.Kim, M. Ahn, and Y. Iwasa, "Operation and performance analyses of 350 and 700 MHz low-/high-temperature superconductor nuclear magnetic resonance magnets: A march toward operating frequencies above 1 GHz," J. Appl. Phys., vol. 105, pp. 024501, 2009. https://doi.org/10.1063/1.3065538
  17. B. Parkinson, R. Slade, M. Mallett, and V. Chamritski, "Development of a cryogen free 1.5 T YBCO HTS magnet for MRI," IEEE Trans. Appl. Supercond., vol. 23, no. 3, pp. 4400405, 2012 https://doi.org/10.1109/TASC.2012.2235893
  18. K. Bhattarai, K. Kim, S. Kim, S. Lee, and S. Hahn, "Quench analysis of a multiwidth no-insulation 7-T 78-mm REBCO magnet," IEEE Trans. Appl. Supercond., vol. 27, no. 4, pp. 4603505, 2017.
  19. S. Wimbush and N. Strickland, Critical current characterization of SuNAM SAN04200 2G HTS superconducting wire. [Online]. Available: https://doi.org/10.6084/m9.figshare.5182354.v1
  20. K. Bhattarai, K. Kim, K. Kim, K. Radcliff, X. Hu, C. Im, T. Painter, I. Dixon, D. Larbalestier, and S. Lee, "Understanding quench in no-insulation (NI) REBCO magnets through experiments and simulations," Supercond. Sci. Technol., vol. 33, pp. 035002, 2020. https://doi.org/10.1088/1361-6668/ab6699
  21. K. Tsuchi, A. Kikuchi, A. Terashima, K. Norimoto, M. Uchida, M. Tadawa, M. Masuzawa, N.Ohuchi, X. Wang, T. Takao, and S. Fujita, "Critical current measurement of commercial REBCO conductors at 4.2K," Cryogenics., vol. 85, 2017.
  22. X. Wang, S. Hahn, Y. Kim, J. Bascunan, J. Voccio, H. Lee, and Y. Iwasa, "Turn-to-turn contact characteristics for an equivalent circuit model of no-insulation ReBCO pancake coil," Supercond. Sci. Technol., vol. 26, pp. 035012, 2013. https://doi.org/10.1088/0953-2048/26/3/035012
  23. S. Noguchi, "Formulation of the spherical harmonic coefficients of the entire magnetic field components generated by magnetic moment and current for shimming," J. Appl. Phys., vol. 115, no. 16, pp. 163908, 2014. https://doi.org/10.1063/1.4872244