Colloquium speaker, Don Lamb (University of Chicago) today at 4:00pm.

[Patterson, Robin L.]

Please take note of Colloquium taking place today, Tuesday, April 7, 2015 at 4:00 PM in The Robert Smith Seminar Room. There will be a reception in the Atrium at 3:45PM. Details concerning the talk are as follows:

Speaker:              Don Lamb (University of Chicago)
Date:                     Tuesday, April 7, 2015
Time:                     4:00 PM
Place:                    1080 Physics Research Building, The Robert Smith Seminar Room
Title:                     Studying the Turbulent Amplification of Magnetic Fields in Laboratory and Astrophysical Plasmas Using High-Intensity Laser Experiments


Abstract:  Magnetic fields are ubiquitous in the universe, but the origin of these fields is not fully understood.  Cosmologists and astrophysicists have proposed a variety of ways in which small seed magnetic fields could be created.  It is widely thought that the much larger values of the cosmic magnetic fields that we observe are a result of the amplification of these seed fields by the nonlinear turbulent dynamo mechanism.  However, this mechanism has never been demonstrated in the laboratory.  We describe experiments we conducted on the Vulcan laser at the Rutherford-Appleton Laboratory, which demonstrate the amplification of magnetic fields by turbulence.  We then describe accepted experiments on the Omega laser and the National Ignition Facility that are designed to demonstrate the amplification of magnetic fields by the nonlinear turbulent dynamo mechanism - a great challenge of experimental plasma physics.  We highlight the critical role of the validated simulations we have done using the FLASH code in the design, analysis, and interpretation of these experiments.

The website for the colloquium is https://physics.osu.edu/physics-colloquium-schedule.



Robin
[The Ohio State University]
Robin Patterson
Undergraduate Program, Colloquium and Seminar Coordinator
Department of Physics
1040K Physics Research Building, 191 W. Woodruff Avenue, Columbus, OH 43210
(614) 292-8523 Office     (614) 292-7557 Fax
patterson.716 at osu.edu<mailto:patterson.716 at osu.edu> osu.edu<http://osu.edu/>

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