Research Interests and Approach

Electromagnetic phenomena in superconductors

  • Shielding-current-induced field, which affect field quality of a magnet
  • Ac loss generated by fluxoid's motion, which deteriorates the benefit of a superconductor i.e. "no energy dissipation"

Mixed-state


Approaches


  • Electromagnetic simulations using high performance computing techniques
  • Experiments using a unique ac loss measurement system
 

Electromagnetic simulations of superconductors

  • Calculating and visualizing current distributions in 3D-shape conductors and coils
  • Estimating shielding-current-induced fields and ac loss
Approaches and equipment
  • Hierarchical matrices and parrallel computing
  • Cluster type computation server
  

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Characterizations of superconductors and superconducting coils

  • Quench measurements
  • Measurements of field stability of a HTS coil
Equipment
  • Conduction-cooled coil / conductor test stand (5 T, 500 A, 10~50 K)
  • Integrated instrumentation

AC

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Research Interests

Electromagnetic phenomena in superconductors

  • Shielding-current-induced field, which affect field quality of a magnet
  • Ac loss generated by fluxoid's motion, which deteriorates the benefit of a superconductor i.e. "no energy dissipation"
  • In physics research, these electromagnetic phenomena in superconductors, furthermore electromagnetic-thermal coupling analysis, are the interests.

Mixed-state

















Enabling technology for superconductors

  • In engineering research, innovative electrical power devices and systems, which are based on the clarified electromagnetic phenomena in superconductors, are the interests.
  







Approach

High performance computing

Computing simulation is necessary to carry out electromagnetic analysis and thermoelectric coupled analysis of superconductor. We calculate by using our computer cluster system and our original simulation code.

Computer spec
・The number of CPU core: 236 in total
・Memory: 3.4 TB
・High-speed transfer between nodes by InfiniBand

Computer cluster system


 

Characterizations of superconductors and superconducting coils

  • We do the research about ac loss, normal state propagation and so on with the following equipment.
Equipment
  • Ac loss measurement system
  • Conduction-cooled coil / conductor test stand (5 T, 500 A, 10~50 K)
  • Multipole field components measurement system
  • Integrated instrumentation

Ac loss measurement system

Integrated instrumentation

Conduction-cooled coil / conductor test stand

Multipole field components measurement system