Team Supercool Naomi Kohen Chris Kinney Andy Lin David Schoen

Superconducting Actuator  Superconductors: 0 resistance at low T  Electrical actuator Electrical Energy-> Mechanical  Goal: Use HTS from American Superconductor for an Actuator

Application: Punch  Use Solenoid for magnetic field  A hard magnet accelerates in the field  A strong field will produce a significant force.

Important Considerations  Need highest possible field  Magnetic Field and the Force produced are proportional to critical current  Critical Current is determined by Temperature Magnetic Field Strain

Current vs Bending Diameter Conflicting Data Another AS Spec Sheet: 100 mm

Magnetic-Field Effects

Constraints  Currently 4 m wire Using B = n I / 80L 5 cm long, 5 cm diameter -> 25 turns I = 100 A 625 Gauss,.0625 Tesla  Can get 50 m of wire Neglecting H-field effects, ~8000 gauss Need He-Cooling for high H-field

Critical Current Tests

Early Results

Problem?  How to interpret data?

Problems

Analysis  Summary Data mismatch with literature Can’t determine Ic  Causes? Kinks in wire during setup Other test differences  Perspective Wire still carries 120 A without large resistance

Next Steps  Determine optimal radius Varying PVC tubes with small wires, test critical current Choose smallest radius with best Ic  Build small solenoid Use best radius PVC tube  Estimate magnetic field needed for Punch

Revised Schedule

Questions?