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Carlos R. Villa October 24, 2008 FAST Conference

Carlos R. Villa October 24, 2008 FAST Conference. NHMFL Overview. One Of Three National Labs In The Southeast U.S. One Of Nine High Magnetic Field Labs In The World Only One In Western Hemisphere Largest And Highest Powered In The World. NHMFL Overview. User Laboratory

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Carlos R. Villa October 24, 2008 FAST Conference

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  1. Carlos R. Villa October 24, 2008 FAST Conference

  2. NHMFL Overview • One Of Three National Labs In The Southeast U.S. • One Of Nine High Magnetic Field Labs In The World • Only One In Western Hemisphere • Largest And Highest Powered In The World

  3. NHMFL Overview • User Laboratory • Over 800 User Visits (2005) • NSF Funded • Research Free To Scientist • Research In Many Fields (Not Just Magnets!!) • Biology, Chemistry, Biomedical, Geology, Engineering, Geochemistry, Materials Science, Physics, Microscopy…

  4. Gauss • Measurement Of Magnetic Field • Named For Carl Friedrich Gauss • Tesla • Measurement Of Larger Magnetic Fields • Named For Nikola Tesla • 10,000 Gauss = 1 Tesla

  5. Refrigerator Magnet: .03 T • Earth’s Magnetic Field: .000045 T • Person’s Magnetic Field: 3 x10-13 T • Junkyard Magnet: 1 T • MRI Magnet: 2-3 T

  6. NHMFL ICR Magnet: 9.4 T • Ionic Cyclotron Resonance • NHMFL 900 Mhz: 21 T • Nuclear Magnetic Resonance • NHMFL Resistive Magnet: 20-35 T • NHMFL Hybrid Magnet: 45 T • Resistive And Superconducting • NHMFL Pulse Magnet: 65 T • Not Continuous Field

  7. Not All Metals Are Magnetic • 3 Are Naturally Magnetic • Iron • Nickel • Cobalt • Exceptions To The Rule • Gadolinium (Must Be Frozen)

  8. Fe(II)Fe(III)2O4 • Naturally Magnetic Igneous Rock • Usually found in marine sands and deserts • Largest US deposit in NY (Adirondacks) • Lodestone Found In Arkansas • Different Crystalline Structure

  9. Electron Configuration • Normally Scattered • Magnetic Domains • In Magnets: Lined Up • Whenever You Get Electrons All Pointing The Same Direction, A Magnetic Field Is Produced Around That Item

  10. Electrons Are Naturally Aligned Pointing The Same Direction • Field Will Stay Until Destroyed • Curie Point • Electric Current • Degaussing • Bang It • Examples: Refrigerator Magnets, Bar Magnets, Magnetite, Horseshoe Magnets, Hematite, Buzz Stones, etc…

  11. Electrons Are Temporarily Aligned • Will Keep Magnetic Field Until Tampered • Examples: • Paperclips, Scissors, Staples, Thumb Tacks, Push Pins, Screwdrivers, Refrigerator, Car Doors, etc… • Anything that is magnetic, but will not keep its field

  12. Field Viewers • Box Photo Frames • Iron Filings • Use With Paper • Clean-up Can Be A Mess

  13. One Bar Magnet • As Many Compasses As You Can Gather

  14. Ward’s Scientific

  15. Magnetize An Item • Allow It To Float • Must Turn Freely • Needle • Petri Dish • Coffee Stirrer • Water • Permanent Magnet

  16. The Two Are So Closely Related • Where There Is Electricity, There Is A Magnetic Field • Where There Is A Magnetic Field, Electricity Can Be Created

  17. Electricity Is The Movement Of Electrons • Electrons Flow In One Direction • This Alignment Of Electrons Creates A Magnetic Field • Similar To Electrons Lining Up In A Permanent Magnet • So Every Wire Carrying Electricity Has A Weak Magnetic Field Around It (Try It) • Coiling The Wire Concentrates The Magnetic Field Inside The Coil

  18. Materials • Copper Wire • Iron Rod • Battery • Extensions: • 2 Batteries • In Line? • Aluminum, Wooden Rod • Will They Work?

  19. Right Hand Rule • Direction Of Field • Poles (Winding Direction) • Use Magnaprobe • Variables: • Neatness • Number Of Winds • Wire Gauge • Battery Strength • Temperature

  20. Bitter Plates

  21. Bitter Plates

  22. Bitter Plates

  23. Iron In Cereal • Total • Baby Food • Need A Strong Magnet • Neodymium

  24. A Special Solution Of Magnetic Particles In A Colloidal Suspension Whose Flow Can Be Controlled By Magnets Or Magnetic Fields. Ferrofluids

  25. Ferrofluids • Make Your Own: • Oil, Petri Dish, Magnet • Please Be Careful • Iron Filings: • Education Innovations • Post Apple Scientific • Actual Ferrofluids Available: • Carolina Biological • Educational Innovations

  26. When an emf is generated by a change in magnetic flux according to Faraday's Law, the polarity of the induced emf is such that it produces a current whose magnetic field opposes the change which produces it.

  27. Changing Magnetic Flux Produces An Induced Electric Field • Copper Tube, Neodymium Magnet

  28. Use Copper Wire To Attach LED Lights On A Plastic Pipe.

  29. Superconductors Exhibit Two Distinct Properties • Zero Resistance • Perfect Diamagnetism

  30. Diamagnetic Behavior Is Limited • YBCO Works Well • Kit Available From Colorado Superconductor Inc.

  31. Additional Resources • Driving Force • The Natural Magic of Magnets • James D. Livingston • NSTA Press: Stop Faking It • Electricity and Magnetism

  32. Additional Resources • http://education.magnet.fsu.edu • MagLab Alpha Download • K-12 Programs • RET Program

  33. Business Cards • Please Do Not Hesitate To Contact Me With Questions, Ideas, Suggestions… • Free Pencils In The Back • Free Magnets Too!

  34. Carlos R. Villa K-12 Education Outreach Coordinator National High Magnetic Field Laboratory villa@magnet.fsu.edu 850-644-7191

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