David Arnold's Research Group

Tailoring Energy Flow in Magnetic Oscillator Arrays

Despite the fact that nonlinearities are inherent in many natural and engineered systems, it is common for engineers to remove, or attempt to remove, all nonlinearity from their designs. Although this simplifies the performance analyses, it also overlooks a wide array of phenomena that could potentially enable fundamental breakthroughs.

The objective of this project is to derive fundamental insights for complex arrays of nonlinearly coupled oscillators, using structures defined as magneto-mechanical lattices. The magneto-mechanical lattices comprise periodic arrays of dynamically interacting magnets, which can be conceptualized as an array of equivalent springs and masses, or alternatively, as a solid composed of artificial macro-atoms. The nonlinear magnetic coupling is to be theoretically tailored to exploit nonlinear energy transfer behaviors, such as reconfiguring bandgaps, energy localization, internal resonances, etc. These nonlinear phenomena are to be experimentally demonstrated and measured by fabricated magneto-mechanical lattices.

IMG Seminar Series: Sub-mm Magnetic Undulators for Photon Generation

Event date: 
Fri, 07/19/2013 - 3:15pm to 4:00pm
This Friday at 11:15 AM, Alexandra Garraud will give a practice talk in preparation for a presentation at the 1st Advanced Superconducting Test Accelerator (ASTA) Users' Meeting at  Fermilab, IL . During this talk, the fabrication, operation and applications of the magnetic undulator with an electron beam will be discussed. All are encouraged to attend. The venue is LAR 234.
The seminar will be followed by the IMG BBQ at 12 PM.

IMG Seminar Series: Magnetic patterning of hard magnetic films for biomagnetic applications

Event date: 
Fri, 05/31/2013 - 3:30pm to 4:00pm

This Friday at 11:30 am, we will have a presentation by Ololade Oniku on "Magnetic patterning of hard magnetic films for biomagnetic applications." This will be a practice talk for Ololade's upcoming conference and fellow IMGers are invited to provide constructive inputs for the presentation. The talk will be followed by the IMG BBQ at noon.

IMG @ Hilton Head

IMG will be well-represented at the upcoming Hilton Head Workshop in June.  This workshop is the preeminent microsystems meeting in North America, with an acceptance rate of only 46%.  Congratulations to the following authors:

  • J. Meloy, J. Sells, V. Chandrasekharan, J. Griffin, L.N. Cattafesta, D.P. Arnold, and M. Sheplak, “Experimental Verification of a Capacitive Shear Stress Sensor for Low-Speed Wind Tunnel Applications”  (Poster)
  • C.D. Meyer, S.S. Bedair, B.C. Morgan, D.P. Arnold "Ultra-miniaturized power converter modules using micromachined copper scaffolds" (Oral)
  • S. R. Samuelson, and H. Xie, “A Large Piston Displacement MEMS Mirror With Electrothermal Ladder Actuator Arrays for Fourier Transform Spectroscopy Applications” (Poster)
  • V. Tseng, and H. Xie, “A Novel High-Density Capacitor Design and Its Fabrication Technique Based On Selective Etching" (Poster)
  • J.C. Zito, R.J. Durscher, J. Soni, S. Roy, and D. P. Arnold "Mechano-fluidic characterization of microscale dielectric barrier discharge plasma actuators" (Oral)