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High Temperature Superconducting Solenoid Punch
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Our Mission Make an actuator using BSSCO 2223 HTS tape from American Superconductor
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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 Copper solenoids http://www.magnet-schultz.com/msafront2.jpg
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Permanent magnet levitating over a superconductor http://helium.ee.tut.fi/supraryhma/images/korkealla.jpg 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
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BSSCO 2223 Structure BSSCO 2223 Unit Cell http://www.library.uow.edu.au/adt-NWU/uploads/approved/adt- NWU20030305.113225/public/02Whole.pdf
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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
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BSSCO 2223 Processing
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BSSCO 2223: I C vs. H
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Current vs. Bending Diameter
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Actuator Choice Persistent actuator? Can’t make superconducting junction Core choice Magnetostrictive Hard magnet Soft magnet
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Coil Radius Setup
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Radius Measurements
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The Apparatus
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Field Calculations Magnetic field (tesla, cm)
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Force Magnetization of Fe: 334225 A/m Force (N, cm)
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Apparatus Fabrication
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Solenoid Assembly
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Assembled Solenoid
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Testing: Magnetic Field
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Testing: Magnetic Gradient 1 amp, room temperature
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Self-Field Tests
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Current Tests
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Load Cell Setup
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Force
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Supercool
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Conclusions Copper solenoid (1.5” x 2.4”) outperforms our actuator (force), even at room temperature
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Energy Density Energy density of Supercool solenoid: 17400 J/m 3 7.0 cm outer diameter 3.36 J of total energy Energy density of 1.5” x 2.4” Cu solenoid: 16100 J/m 3
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Further Considerations Commercial tape: > 135 A Colder temperature YBCO 2 nd generation tape ~ 7 T at 77K
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Acknowledgements Professor Chiang Professor Vander Sande Yin-Lin Xie David Bono Ken Stone Ed Moriarty Leslie Bromberg 3.082 staff
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References YBCO second generation tape: http://www.amsuper.com/html/products/library/2g_white_paper_-_march_2004.pdf http://www.amsuper.com/html/products/library/2g_white_paper_-_march_2004.pdf Montgomery, D. Bruce. Solenoid Magnet Design: The Magnetic and Mechanical Aspects of Resistive and Superconducting Systems. Wiley-Interscience, New York. 1969. Magnet-Schultz commercial Cu solenoid: http://magnet-schultz.com/newRTP24X19INT.htm http://magnet-schultz.com/newRTP24X19INT.htm
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