|Colloquium 01/31/2014 -The First Measurement of Spatially-Localized Viscous Heating|
|Time: Jan 31, 2014 03:00 PM|
|Location: Parker Hall Room 236 Snacks provided Allison Lab 200 @ 2:45|
heating. The substance is a strongly-coupled dusty plasma. Dusty plasmas are common in interstellar nebulae; they are a mixture of small solid particles, electrons, ions and gas. They can also be made in the laboratory by introducing polymer microspheres into a low-pressure gas that is partially ionized. The polymer microspheres are electrically levitated. Under laboratory conditions, the collection of microspheres behaves like molecules in a liquid, but with an extraordinarily low density. The radiation pressure force from a laser is used to drive a flow of the polymer microspheres, which are imaged using a high-speed video camera.