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Solid cryogen: a cooling system for future MgB2 MRI magnet

Journal Article


Abstract


  • An efficient cooling system and the superconducting magnet are essential components of magnetic resonance imaging (MRI) technology. Herein, we report a solid nitrogen (SN2) cooling system as a valuable cryogenic feature, which is targeted for easy usability and stable operation under unreliable power source conditions, in conjunction with a magnesium diboride (MgB 2) superconducting magnet. The rationally designed MgB 2/SN2 cooling system was first considered by conducting a finite element analysis simulation, and then a demonstrator coil was empirically tested under the same conditions. In the SN2 cooling system design, a wide temperature distribution on the SN2 chamber was observed due to the low thermal conductivity of the stainless steel components. To overcome this temperature distribution, a copper flange was introduced to enhance the temperature uniformity of the SN2 chamber. In the coil testing, an operating current as high as 200 A was applied at 28 K (below the critical current) without any operating or thermal issues. This work was performed to further the development of SN2 cooled MgB 2 superconducting coils for MRI applications.

Authors


  •   Patel, Dipakkumar (external author)
  •   Hossain, Md Shahriar
  •   Qiu, Wenbin (external author)
  •   Jie, Hyunseock (external author)
  •   Yamauchi, Yusuke (external author)
  •   Maeda, Minoru (external author)
  •   Tomsic, Michael (external author)
  •   Choi, Seyong (external author)
  •   Kim, Jung Ho

Publication Date


  • 2017

Citation


  • Patel, D., Hossain, M. Al., Qiu, W., Jie, H., Yamauchi, Y., Maeda, M., Tomsic, M., Choi, S. & Kim, J. (2017). Solid cryogen: a cooling system for future MgB2 MRI magnet. Scientific Reports, 7 43444-1-43444-8.

Scopus Eid


  • 2-s2.0-85014479233

Start Page


  • 43444-1

End Page


  • 43444-8

Volume


  • 7

Abstract


  • An efficient cooling system and the superconducting magnet are essential components of magnetic resonance imaging (MRI) technology. Herein, we report a solid nitrogen (SN2) cooling system as a valuable cryogenic feature, which is targeted for easy usability and stable operation under unreliable power source conditions, in conjunction with a magnesium diboride (MgB 2) superconducting magnet. The rationally designed MgB 2/SN2 cooling system was first considered by conducting a finite element analysis simulation, and then a demonstrator coil was empirically tested under the same conditions. In the SN2 cooling system design, a wide temperature distribution on the SN2 chamber was observed due to the low thermal conductivity of the stainless steel components. To overcome this temperature distribution, a copper flange was introduced to enhance the temperature uniformity of the SN2 chamber. In the coil testing, an operating current as high as 200 A was applied at 28 K (below the critical current) without any operating or thermal issues. This work was performed to further the development of SN2 cooled MgB 2 superconducting coils for MRI applications.

Authors


  •   Patel, Dipakkumar (external author)
  •   Hossain, Md Shahriar
  •   Qiu, Wenbin (external author)
  •   Jie, Hyunseock (external author)
  •   Yamauchi, Yusuke (external author)
  •   Maeda, Minoru (external author)
  •   Tomsic, Michael (external author)
  •   Choi, Seyong (external author)
  •   Kim, Jung Ho

Publication Date


  • 2017

Citation


  • Patel, D., Hossain, M. Al., Qiu, W., Jie, H., Yamauchi, Y., Maeda, M., Tomsic, M., Choi, S. & Kim, J. (2017). Solid cryogen: a cooling system for future MgB2 MRI magnet. Scientific Reports, 7 43444-1-43444-8.

Scopus Eid


  • 2-s2.0-85014479233

Start Page


  • 43444-1

End Page


  • 43444-8

Volume


  • 7