Meeting to be preceded by the annual election of LMAG officers.
Social gathering and election starts at 5:30--talk at 6:00--tour at 6:30 PM
| Speaker: | Professor David Anderson |
| Location: | UW Engineering Hall 1415 Engineering Drive Madison, Wisconsin |
| Menu: | Pizza, Beverage, Cookies for $5.00 Donation (Members) |
| RSVP: | Please Register at the IEEE Madison
Section events page. Non-member guests are always welcome. |
| Contact: | If needed, please contact Tom Kaminski at: tjkaminski49@gmail.com. |
Controlled thermonuclear fusion presents the possibility of virtually limitless energy with no greenhouse gas emissions. The challenges to making this a reality are daunting. Never-the-less, over 20 MW of fusion power has been released in laboratory experiments and an international effort (ITER) is underway to produce 500 MW of fusion power for periods up to ½ hour to study ?burning plasmas? (predominantly self-heated). ITER is based upon the tokamak concept, which has achieved the highest plasma parameters to date. An alternative concept to the tokamak, the stellarator, possesses significant engineering advantages when considered as a power-producing reactor, and recent work in ?optimized? stellarators shows great promise. HSX (the Helicaly Symmetric Experiment) is the first of this new generation of optimized stellarators. This talk will focus on the present state of fusion research and the role of the stellarator in addressing open issues, and HSX contributions to the program. We will conclude with a tour of the HSX facility in Engineering Hall.
David Anderson received his Ph.D. degree from the University of Wisconsin-Madison in 1984 with a major in Electrical Engineering. He was employed as a scientist there from 1980-1999, and has been a professor in the Department of Electrical and Computer Engineering since that time, currently holding the Jim and Anne Sorden professorship. He also holds an affiliate appointment as a professor in the Physics Department. His main interests are in experimental plasma physics research focused on controlled thermonuclear fusion and teaches predominantly in this area and electromagnetics. He has served on numerous advisory and review committees for national laboratories and international programs and is the Director of the HSX Plasma Laboratory.
Social gathering at 11:30--talk at noon.
| Speaker: | Dr. Bethanie Stadler, University of Minnnesota, stadler@umn.edu, http://stadl002.wix.com/stadler-nmp-website |
| Location: | Promega BioPharmaceutical Technology Center Room 226/7 5445 E Cheryl Pkwy Fitchburg, Wisconsin |
| Menu: | Pizza, Beverage, Cookies $5.00 Donation requested of IEEE Members; $10 non-members; free for students |
| RSVP: | Please Register at the IEEE Madison
Section events page. Non-member guests are always welcome. |
| Contact: | If needed, please contact Tom Kaminski at: tjkaminski49@gmail.com. |
Magnetic nanowires can have many names: bits, sensors, heads, artificial cilia, sensors, and nano-bots. These applications require nanometer control of dimensions, while incorporating various metals and alloys. To realize this control, our 7- to 200-nm diameter nanowires are synthesized within insulating matrices by direct electrochemistry, which negates sidewall damage such as that caused by lithographical patterning of vacuum-deposited structures. Our nanowires can easily have lengths 10,000x their diameters, and they are often layered with magnetic (Co, Fe, FeGa, FeNi, Ni) and non-magnetic (Ag, Cu, Au) metals as required by each application. This talk will reveal synthesis secrets for nm-control of layer thicknesses, even for difficult alloys, which has enabled studies of magnetization reversal, magneto-elasticity, giant magnetoresistance (GMR), and spin transfer torque (STT) switching. In addition, this lithography-free synthesis yields 10-nm diameter nanowires that have resistivities of only 5.4μΩ.cm (nearly that of bulk copper) due to negligible sidewall roughness. Therefore, these nanowires will mitigate the ITRS Roadmap’s “Size Effect” Grand Challenge which identifies the high resistivities in small interconnects as a barrier to continued progress along Moore’s Law (or better). Ten-nm diameter trilayers of [Co(15nm)/Cu(5nm)/Co(10nm)] have also met or surpassed all of the criterion for the world’s smallest read heads with 30 Ω resistance and 19% magnetoresistance. High magnetoresistance is also possible in other multilayered nanowires that exhibit excellent properties for mulit-level nonvolatile random access memory (RAM) using STT switching at very low current densities (100kA/cm2). If the insulating growth matrix is etched away, the nanowires resemble a magnetic bed of nano-seaweed which enables microfluidic flow sensors and vibration sensors. Finally, we have incubated various nanowires with several healthy and cancerous cell lines, and find that they are readily internalized by all cell types thus far. Careful magnetic design of these “nano-bots” enables external steering, nano-barcode identification, and several modes of therapy. In short, by the end of this talk, I hope you will be convinced that magnetic nanowires can and will revolutionize hard drives, RAM, and cancer treatment.
Dr. Bethanie Stadler works on the integration of nanomagnetic and photonic materials with a variety of platforms to allow the development of practical devices and systems. This includes magnetic nanowires for magnetoelectronics (including hard drive heads), microfluidic flow sensors and actuators, acoustic/vibration sensor applications, and cellular biomarkers. In photonics, Stadler works on the integration of magnets, magneto-optical garnets waveguides, and nanostructures for magnetophotonic crystals with semiconductor platforms for isolator and sensor applications.
Stadler received her PhD from MIT in 1994 and her B.S. from Case Western Reserve University in 1990, both in Materials Science and Engineering. She held a NRC postodoctoral fellowship at the Air Force Rome Laboratory before joining Electrical and Computer Engineering at the University of Minnesota, where she is also on the Graduate Faculty of Chemical Engineering and Materials Science. She has been awarded the NSF CAREER award and a McKnight Presidential Fellowship. Stadler has served both as Director and Secretary of the Materials Research Society, and has been asked to teach for the IEEE Magnetic Summer School in Chennai India and in Assis Italy.
| Location: | Sector67, 2100 Winnebago Street, Madison, 53704 |
| Menu: | Bring your own lunch. There are sodas and snacks for sale. There is a microwave. |
| RSVP: | None needed--just show up. |
| Contact: | If needed, please contact Tim Chapman 6 0 8 2 0 6 2 5 7 0. |