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MilliKelvin Lab at NHMFL Tallahassee, Florida

MilliKelvin Lab at NHMFL Tallahassee, Florida. Amanda Underwood Robertson Elementary Robertson, Kentucky Soon Young Kim Moanalua High School Honolulu, Hawaii. Mentors. Dr. Eric Palm. Mr. Tim Murphy. MilliKelvin Lab. Low temperature physics House three super-conducting Magnets

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MilliKelvin Lab at NHMFL Tallahassee, Florida

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  1. MilliKelvin Lab at NHMFL Tallahassee, Florida Amanda Underwood Robertson Elementary Robertson, Kentucky Soon Young Kim Moanalua High School Honolulu, Hawaii

  2. Mentors • Dr. Eric Palm • Mr. Tim Murphy

  3. MilliKelvin Lab • Low temperature physics • House three super-conducting Magnets • User facility

  4. Purpose of MilliKelvin Lab • To reduce thermal motion of molecules in the sample so the motion doesn’t hide the effects being studied • Behavior of new combinations of materials can be observed • To study the phase transition

  5. MilliKelvin Instrumentation • Two 20 Tesla magnets • Largest commercially available magnets • Top loader • Bottom loader • One 17 T Magnet • Dilution refrigerator • Enables temperature of 25K above absolute zero

  6. Cryogenic Material • Cooling Liquid Temperature at atmospheric pressure • Oxygen 80K • Nitrogen 77K • Hydrogen 20K • Helium-4 4.2K • Helium-3 3.2K

  7. 3He and 4He • He-3 is a bi-product of nuclear decay • He-3 and He-4 mixture are used to produce lower temperatures • decreasing pressure will decrease temperatures • At 1 millibar of pressure • He-4 is 1.2K • He-3 is 0.3K

  8. He-3 and He-4 Mixture • Cooling with the mixture in the dilution refrigerator the lab can achieve 0.008K (8mK)

  9. Hybrid Magnet • 34 T Resistant magnet • 11 T Super-conducting magnet • 45 Tesla

  10. Hybrid Magnet • Users • Other researching scientist apply to use the Hybrid magnet. The Magnet Lab divides the time among the different scientists. • Set up • There are two ways this can be done. Collaboration with in-house researchers or the lab provides the magnet and instruments for the researchers to use.

  11. Setting Up Portable dilution refrigerator in Hybrid

  12. Setting Up Portable dilution refrigerator in Hybrid • Probe and vacuum pipe

  13. Setting Up Portable dilution refrigerator in Hybrid

  14. Setting Up Portable dilution refrigerator in Hybrid

  15. Problems • Vibration • Humidity • Availability of specific probes • Time • Faulty instrumentation • Magnet time • Set up time • User time • Contamination

  16. Vibration • Isolated Sand filled tripod • Thomson rails

  17. Condensation • Swab the magnet bore • Flush with Nitrogen gas

  18. Probes • Build and design probes in Millikelvin lab

  19. Time • Faulty instrumentation • Magnet time • Set up time • User time

  20. Contamination • charcoal filter used to purify and recycle Helium

  21. Research Area • CeCoIn5 • CeIrIn5 • Depleted Uranium (non-radioactive) • Instrumentation • Cantilever Magnetometry • Tunnel Diode Oscillator • used for sensitivity and size

  22. Research Area • Tunnel Diode Oscillator

  23. Application • Pure Science • Curiosity • spin-off • Later use • New materials/ Technology will follow • Examples • dilution refrigerator • superconductor

  24. Thank You!  • MilliKelvin Lab • Dr. Eric Palm • Mr. Tim Murphy • Mr. Henri Radovan • Ms. Sahara Hernandez (REU) • CIRL Staff • Dr. Pat Dixon • Ms. Gina LaFrazza • Mr. Carlos Villa • Mr. Dave Sheaffer • Ms. Stacy Vanderlaan

  25. Thank You!  • National High Magnetic Field Lab • National Science Foundation

  26. Any Questions?

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