1. High-Temperature Superconductors Team Supercool Andy Lin Chris Kinney Naomi Kohen David Schoen Advised by Yin-Lin Xie

2. What is a superconductor? Permanent magnet levitating over a superconductor http://helium.ee.tut.fi/supraryhma/images/korkealla.jpg

3. What is a superconductor? A material that conducts without resistance A material that conducts without resistance Impenetrable by external magnetic fields (up to a point) Impenetrable by external magnetic fields (up to a point) Two types: Type I and Type II Two types: Type I and Type II Examples: Examples: –YBCO: Yttrium barium copper oxide –BSSCO 2212, 2223: (Bi,Pb) 2 Sr 2 Ca 1 Cu 2 O x, (Bi,Pb) 2 Sr 2 Ca 2 Cu 3 O x

4. What is a superconductor? Maglev train in Japan http://www.fys.uio.no/super/gallery.html http://www.fys.uio.no/super/gallery.html

5. What does an actuator do? Mechanical energy conversion

6. What is an actuator? MEMX High Performance Steerable MicroMirrors http://www.memx.com/products.htm A device that converts between mechanical energy and other forms

7. What is an actuator? MEMX High Performance Steerable MicroMirrors http://www.memx.com/products.htm

8. Our HTS Tape American Superconductor BSSCO 2223 4 mm (W) x 0.21 mm (T) Up to ~108 A Critical temperature (T C ) of 110 K

9. BSSCO 2223 Structure BSSCO 2223 Unit Cell http://www.library.uow.edu.au/adt-NWU/uploads/approved/adt- NWU20030305.113225/public/02Whole.pdf

10. BSSCO 2223 Structure Tl 2 Ba 2 Ca 2 Cu 3 O 10 : structurally similar to BSSCO 2223 http://www.library.uow.edu.au/adt-NWU/uploads/approved/adt- NWU20030305.113225/public/02Whole.pdf

11. BSSCO 2223 Processing

12. Hurdles and Unknowns Critical current decreases as coil decreases in diameter

13. Hurdles and Unknowns http://www.ornl.gov/info/reports/m/ornlm3063r1/fig11.gif

14. Measurement and Comparison Standard properties –Resistance –Magnetic field –Response time

15. Measurement and Comparison Comparison to copper solenoid

16. Example Test Setup

17. Project Schedule