한국초전도ㆍ저온공학회논문지 (Progress in Superconductivity and Cryogenics)

  • 제11권4호
  • /
  • Pages.1-7
  • /
  • 2009
  • /
  • 1229-3008(pISSN)
  • /
  • 2287-6251(eISSN)
한국초전도저온학회 (The Korean Society of Superconductivity and Cryogenics)
권호 표지
DOI QR코드

DOI QR Code

High-temperature superconductors for NMR/MRI magnets:opportunities and challenges

  • Iwasea, Yukikazu (Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology) ;
  • Bascunan, Juan (Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology) ;
  • Hahn, Seung-Yong (Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology) ;
  • Yao, Wejun (Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology)
  • 발행 : 2009.11.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

The unique features of HTS offer Opportunities and challenges to a number of applications. In this paper we focus on NMR and MRI magnets, illustrating them with the NMR/MRI magnets that we are currently and will shortly be engaged: a 1.3GHz NMR magnet, an "annulus" magnet, and an $MgB_2$ whole-body MRI magnet. The opportunities with HTS include: 1) high fields (e.g., 1.3GHz magnet); 2) compactness (annulus magnet); and 3) enhanced stability despite liquid-helium-free operation ($MgB_2$ whole-body MRI magnet). The challenges include: 1) a large screening current Beld detrimental to spatial field homogeneity (e.g., 1.3 GHz magnet); 2) uniformity of critical current density (annulus magnet); and 3) superconducting joints ($MgB_2$ magnet).

키워드

참고문헌

  1. Yukikazu Iwasa, Case Studies in Superconducting Magnets (Springer, 2009)
  2. John Voccio (American Superconductor Corp., personal communication, 2008)
  3. Masaru Tomita, (Railway Technical Research Institute, personal communication, 2007)
  4. Yukikazu Iwasa, Seung-yong Hahn, Masaru Tomita, Hal-gun Lee, Juan Bascunan, "A 'persistent-mode' magnet com-prised of YBCO annuli," IEEE Trans. Appl. Superconduc. 15. 2352 (2005) https://doi.org/10.1109/TASC.2005.849664
  5. Juan Bascunan, Emanuel Bohrov, Haigun Lee, and Yukikazu Iwasa, "A low- and high-superconducting (LTS/HTS) NMR magnet: design and performance results," IEEE Trans. Appl. Superconduc. 13, 1550 (2003) https://doi.org/10.1109/TASC.2003.812771
  6. Masatosbi Yoshikawa (JASTEC., personal communication, 2006)
  7. T. Kiyoshi, A. Otsuka, S. Choi, S. Matsumoto, K. Zaitsu, T. Hase, M. Hamada, M. Hosono, M. Takahashi, T. Ya-mazaki, and H. Maeda, "NMR upgrading project towards 1.05 GHz," IEEE Trans. AppI. Superconduc. 18, 860 (2008) https://doi.org/10.1109/TASC.2008.921216
  8. Masaru Tomita and Masato Murakami, "High-temperature superconductor bulk magnets that can trap magnetic fields of over 17 tesla at 29K," Nature 421, 517 (2003) https://doi.org/10.1038/nature01350
  9. Yukikazu Iwasa, "Stability and protection of supercouduct-ing magnets-a discussion," IEEE Tians. Appl. Superconduc. 15. 1615 (2005) https://doi.org/10.1109/TASC.2005.849207
  10. S. Hahn, J. Bascunan, H. Lee, E.S. Bobrov, W. Kim, and Y. Iwasa, "Development of a 700 MHz low-/high-temperature superconductor for nuclear magnetic resonance magnet: Test results and spatial homogeneity improve-ment," Rev. Sci. Instrum. 79, 026105 (2008) https://doi.org/10.1063/1.2838587
  11. Seung-yong Hahn, Juan Bascunan, Haigun Lee, Emanuel S. Bobrov, Wooseok Kim, Min Cheol Ahn, and Yukikazu Iwasa, "Operation and performance analyses of 350 and 700 MHz low-/high-temperature superconductor nuclear mag-netic resonance magnets: A march toward operating fre-quencies above 1 GHz," J. Appl. Phys. 105, 024501 (2009) https://doi.org/10.1063/1.3065538
  12. L. Kopera, T. Melisek, P. Kovac, and J. Pitel, "The design and performance of a Bi-2223/ Ag magnet cooled by a single-stage cryocooler," Supercond. Sci. Technol. 18, 977 (2005) https://doi.org/10.1088/0953-2048/18/7/009
  13. C. Gu, T. Qu, and Z. Han, "Measurement and calculation of residual magnetic field in a Bi2223/ Ag Magnet," IEEE Trans. Appl. Superconduct. 17, 2394 (2007) https://doi.org/10.1109/TASC.2007.898137
  14. Min Cheol Ahn, Tsuyoshi Yagai, Seungyong Hahn, Ryuya Ando, Juan Bascunan, and Yukikazu Iwasa, "Spatial and temporal variations of a screening current induced magnetic field in a double-pancake HTS insert of an LTS/HTS NMR magnet," IEEE Tran. Appl. Superconduc. 19, 2269 (2009) https://doi.org/10.1109/TASC.2009.2018102
  15. Seung-yong Hahn, Min Cheol Ahn, Emanuel Saul Bobrov, Juan Bascunan, and Yukikazu Iwasa, "An analytical tech-nique to elucidate field impurities from manufacturing un-certainties of a(n) double pancake type HTS insert for high field LTS/HTS NMR magnets," IEEE Tran. Appl. Super-conduc. 19, 2281 (2009) https://doi.org/10.1109/TASC.2009.2018808
  16. K. Shibutani, T. Egi, S. Hayashi, Y. Fukumoto, I. Shi-gaki , Y. Masuda, R. Ogawa and Y. Kawate, "Fabrication of superconducting joints for Bi-2212 pancake coils," IEEE Trans. Appl. Superconduc. 3, 935 (1993) https://doi.org/10.1109/77.233849
  17. J.E. Tkaczyk, R.H. Arendt, P.J. Bednarczyk, M.F. Gar-bauskas, B.A. Jones, R.J. Kilmer, K.W. Lay, "Supercon-ducting joints formed between powder-in-tube $Bi_{2}Sr_{2}Ca_{2}Cu_{3}O_{z}/Ag$ tapes," IEEE Trans. Appl. Superconduc. 3, 946 (1993) https://doi.org/10.1109/77.233852
  18. Phillip V. Shoaff, Yusuf Hascicek, Justin Schwartz, and Steven W. Van Sciver, "An investigation of the characterizations and development of HTS joints in BSCCO 2212/ Ag composites," IEEE Trans. Appl. Superconduc. 7, 1695 (1997) https://doi.org/10.1109/77.620905
  19. Jung Ho Kim, Kyu Tae Kim, Seok Hern Jang, Jinho Joo, Seyong Choi, Wansoo Nah, Hyoungku Kang, Tae Kuk Ko, Hong-Soo Ha, Sang-Soo Oh, Kang-Sik Ryu, and Philip Nash, "Measurement of joint properties of Bi(Pb)-Sr-Ca-Cu-O (2223) tapes by field decay technique," IEEE Trans. Appl. Superconduc. 13, 2992 (2003) https://doi.org/10.1109/TASC.2003.812049
  20. Jung Ho Kim, Bong Ki Ji, Jinho Joo, Cheol-Woong Yang, Wansoo Nah, "Superconducting joint between Bi-Pb-Sr-Ca-Cu-O superconductor tapes," IEEE Trans. AppI. Super-conduc. 10, 1182 (2000) https://doi.org/10.1109/77.828445
  21. M. Takahashi, K. Tanaka, M. Okada, H. Kitaguchi, and H. Kumakura, "Relaxation of trapped high magnetic field in 100 m-long class $MgB_{2}$ solenoid coil in persistent current mode operation," IEEE Trans. Appl. Superconduc. 16, 1431 (2006) https://doi.org/10.1109/TASC.2006.869993
  22. Roberto Penco and Giovanni Grasso, "Recent development of $MgB_{2}$-based large scale applications," IEEE Trans. Appl. Superconduc. 17, 2291 (2007) https://doi.org/10.1109/TASC.2007.898519
  23. Weijun Yao, Juan Bascunan, Seungyong Hahn, and Yukikazu Iwasa, "A superconducting joint technique for $MgB_{2}$ round wires," IEEE Tran. Appl. Superconduc. 19, 2261 (2009) https://doi.org/10.1109/TASC.2009.2019063