Electromagnetic and Offset Load Analyses of Test Coils of New High Field Superconducting Magnets

Caila DeAbreu Embry-Riddle Aeronautical University, Daytona Beach, FL 32114

Research Experience for Undergraduates (REU) 2018, National High Magnetic Field Laboratory 1800 E. Pual Dirac Drive, Tallahassee, FL 32310,

CORC TEST COIL WITHIN CRYOGENIC MAGNET (TOTAL CENTER FIELD 17.22 T)

Magnetic Field Distribution Within the Coil System.

Fringe Field of the Coil System

Fringe Field of the Coil System

If the CORC coil is shorted and only ¾ carries current, then the axial force on the coil will be 7.32 kN (at full field).

The Worst Case Scenario

The Worst Case Scenario

If the NI-REBCO coil is shorted and only ½ carries the current, then the axial force on the coil will be 1.48 kN (at full field).

Offset Loads on CORC Coil Magnetic Field Distribution Within the Coil System

Offset Loads on NI-REBCO Coil

ACKNOWLEDGEMENTS I am deeply indebted to my mentor Dr. Andy Gavrilin for his technical training and unflagging support. I would also like to thank Jose Sanchez, Assistant Director, Center for Integrating Research & Learning (CIRL) for hosting the program excellently and the National Science Foundation Research Experience for Undergraduate program for this outstanding research opportunity, funded under DMR 1644779.

NI-REBCO COIL WITHIN PETTEN MAGNET (TOTAL CENTER FIELD 9.31T)

OPERA 15 is used to model a layer-wise wound CORC test coil within the Cryogenic magnet of six coils and a NI-REBCO test coil (Project Hercules), consisting of three modules / double pancakes, within the Petten magnet. The magnetic field, and forces and torques due to misalignments, on each test coil are calculated. Also the fringe fields are calculated at the bottom level of background field magnet system. The worst case scenarios, when the test coils are shorted due to quenching, are viewed as well. The following are portions of results obtained.

ABSTRACT

Top View of Coil System

Top View of Coil System

Bore Size 164.2 mm

Maximum Field 14.75 T

Cryogenic Magnet

Inner Diameter

100 mm

Outer Diameter

120 mm

Self Field 2.413 T Height 25.8 mm

Bore Size 175 mm Max Field 6.89 T Height 282.6 mm

Petten Magnet

NI-REBCO Test Coil

CORC Test Coil

Number of Layers 4

Layer Thickness 4.9 mmTurns 48Inner Diameter 80 mmOuter Diameter 119.2 mm SelfField 2.5THeight 58.8mm