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Loop-Gap Resonators: EM Material Properties Measured at Microwave Frequencies University of British Columbia Okanagan Campus Kelowna, British Columbia, Canada October 8, 2019 http://physics.ok.ubc.ca/welcome.html Loop-Gap Resonator (LGR)

  1. Loop-Gap Resonators: EM Material Properties Measured at Microwave Frequencies University of British Columbia – Okanagan Campus Kelowna, British Columbia, Canada October 8, 2019 http://physics.ok.ubc.ca/welcome.html

  2. Loop-Gap Resonator (LGR) PHYS 331 – October 8, 2019 Jake Bobowski 2

  3. Extracting Material Properties PHYS 331 – October 8, 2019 Jake Bobowski 3

  4. Extracting Material Properties PHYS 331 – October 8, 2019 Jake Bobowski 4

  5. Extracting Material Properties PHYS 331 – October 8, 2019 Jake Bobowski 5

  6. Loop-Gap Resonator (LGR) empty High Q filled Low Q PHYS 331 – October 8, 2019 Jake Bobowski 6

  7. Toroidal Loop-Gap Resonator (TLGR) The toroidal geometry confines the magnetic field lines thereby supressing radiation losses. PHYS 331 – October 8, 2019 Jake Bobowski 7

  8. Partially-Filled TLGR PHYS 331 – October 8, 2019 Jake Bobowski 8

  9. TLGR & USPIO Sample 2 mL Molday ION from BioPAL 1.5 inches Fe 3 O 4 (magnetite) nanoparticle suspension Coupling loop H(C 6 H 10 O 5 ) x OH Taylor et al. , (2014) PLOS ONE 9(6): e100259 PHYS 331 – October 8, 2019 Jake Bobowski 9

  10. Complete Equivalent-Circuit Model PHYS 331 – October 8, 2019 Jake Bobowski 10

  11. Static Magnetic Field Scan – Al 2 O 3 PHYS 331 – October 8, 2019 Jake Bobowski 11

  12. Permeability vs Static Magnetic Field – Al 2 O 3 PHYS 331 – October 8, 2019 Jake Bobowski 12

  13. Permeability vs Static Magnetic Field – TiO 2 PHYS 331 – October 8, 2019 Jake Bobowski 13

  14. Permeability vs Static Magnetic Field – Ferromagnetic Resonance in a magnetic nanosuspension PHYS 331 – October 8, 2019 Jake Bobowski 14

  15. Thank You References: • J. Dubreuil and J. S. Bobowski, Journal of Magnetism and Magnetic Materials 489 , 165387 (2019) • J. S. Bobowski, American Journal of Physics 81 , 899 (2013) • J. S. Bobowski and H. Nakahara, Review of Scientific Instruments 87 , 024701 (2016) PHYS 331 – October 8, 2019 Jake Bobowski 15

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