extreme-physics - Extreme Physics Superconductors Nanotubes...

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Extreme Physics: Superconductors, Nanotubes, and Beyond Andra Troncalli, Physics Department conductors at end of 19th century scientists had competing theories about the resistance of conductors at really low temperatures Heike Kamerlingh Onnes discovered superconductivity in mercury, 1911 - have zero resistance! (at extremely low temps, below transition temp. several elements are superconductors. Superconductors can levitate magnets! 1933 discovered that magnetic fields are actively excluded from superconductors. Uses: superconductor uses much less, current flows extremely long time recreate conditions right after big bang), MagLev trains - Magnetically Levitated energy transmission, electric generators, energy storage, transformers, fault limiters, motors, microwave antennas for submarines, SQUIDs (detections of extremely small magnetic fields), magnetoencephalograph Challenges: you always need a coolant - in all above instances liquid helium, which is both expensive and rare A solution would involve superconductors of higher transition temperatures
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This note was uploaded on 04/14/2008 for the course CI 101 taught by Professor Fairley during the Fall '07 term at Austin College.

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extreme-physics - Extreme Physics Superconductors Nanotubes...

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