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Area of Science:

  • Cryogenics
  • Materials Science
  • Medical Imaging Technology

Background:

  • Efficient cooling and superconducting magnets are critical for Magnetic Resonance Imaging (MRI).
  • Existing systems often face challenges with power stability and operational complexity.

Purpose of the Study:

  • To develop and evaluate a solid nitrogen (SN2) cooling system for magnesium diboride (MgB2) superconducting magnets.
  • To ensure stable operation under unreliable power conditions for MRI applications.

Main Methods:

  • Finite element analysis simulation of the MgB2/SN2 cooling system.
  • Empirical testing of a demonstrator coil using the developed cooling system.
  • Introduction of a copper flange to improve temperature uniformity in the SN2 chamber.

Main Results:

  • The MgB2/SN2 cooling system demonstrated stable operation at 28 K.
  • An operating current of 200 A was achieved without issues.
  • A copper flange effectively improved temperature uniformity within the SN2 chamber.

Conclusions:

  • The developed SN2 cooling system is a viable cryogenic feature for MgB2 superconducting coils in MRI.
  • The system offers enhanced usability and stability, particularly under fluctuating power conditions.