Superconducting Solenoid Punch Team Supercool Andy Lin Chris Kinney Naomi Kohen David Schoen

Superconducting Actuator Zero resistance at low T Zero resistance at low T Electrical actuator: Electrical E  Mechanical E Electrical actuator: Electrical E  Mechanical E American Superconductor American Superconductor Goal: HTS solenoid punch Goal: HTS solenoid punch

Why superconducting? Low resistance  Higher efficiency Higher current density  Larger field Fewer turns  Simple design and manufacturing

Superconductor Physics Impenetrable by external magnetic fields (up to a point) Impenetrable by external magnetic fields (up to a point) Type I & II Superconductors Type I & II Superconductors Cooper Pairs Cooper Pairs

BSSCO 2223: Our Tape Provided by American Superconductor Provided by American Superconductor 4 mm (w) x 0.21mm (t) 4 mm (w) x 0.21mm (t) Critical Current rating 85 – 108 A Critical Current rating 85 – 108 A Critical Temp (T c ) 110K Critical Temp (T c ) 110K Currently 2 pieces; 4 and 50 m long Currently 2 pieces; 4 and 50 m long

BSSCO 2223: I C vs. H

The Punch Use solenoid for magnetic field Use solenoid for magnetic field An iron core accelerates in the field An iron core accelerates in the field A strong field will produce a significant force. A strong field will produce a significant force.

Coil Dimensions Inner Coil between 50 mm and 100 mm in diameter Inner Coil between 50 mm and 100 mm in diameter Coil height approximately 75mm Coil height approximately 75mm Between 320 and 160 turns with 50 meters of wire Between 320 and 160 turns with 50 meters of wire

Critical Current Setup

Critical Current Measurements

Coil Radius Setup

Coil Radius Measurements

The Apparatus

Materials Choice PVC PVC Inexpensive Inexpensive Machinable Machinable Diamagnetic Diamagnetic Al Al Inexpensive Inexpensive Easily Machinable Easily Machinable Paramagnetic Paramagnetic Durable Durable

Estimates Displacement (m) Force (N)

Estimates Displacement (m)

Comparisons

Future Considerations Running colder than 77K Running colder than 77K Making a taller or shorter coil Making a taller or shorter coil Punch striking surface Punch striking surface Punch shape Punch shape Retraction Mechanism Retraction Mechanism Pulse (with capacitor)? Pulse (with capacitor)?

Tests Obtain comparable copper solenoid Obtain comparable copper solenoid Magnetic field Magnetic field Force Force Energy density per mass Energy density per mass

Schedule

Questions?

Calculating Force For Loop For Loop Force: Force: Magnetization of Iron: A/m Magnetization of Iron: A/m