SPACE AND COSMIC RAY PHYSICS SEMINAR

University of Maryland
Atlantic Building, Room 2400
4:30 PM Monday, November 10, 2014
Coffee, Tea & Snacks 4:15-4:30 PM

Marc Swisdak
University of Maryland
Double Layers, Electron Heat Flux Suppression, Driving the Solar Wind

Observations of flare-heated electrons in the corona typically suggest they are confined near the looptop. The confinement mechanism, however, remains unclear. We have recently found that transport into the ambient plasma is significantly suppressed by the formation of highly localized, nonlinear electrostatic structures in the form of double layers (DLs). We will discuss the formation of these DLs and their behavior, as well as how they suppress transport and accelerate ambient ions. The latter process clarifies the mechanism by which hot electrons in the corona could couple to and accelerate ions to form the solar wind.


Sponsored by: Department of Physics and the Institute for Physical Science and Technology, University of Maryland. For information call Catha Stewart at (301) 405-4811 or go to the UMD Space Physics group seminar web site.

There is free parking after 4:00 PM in lot B (the big parking garage across the street from the ATL building). There are a limited number of spaces in lot Q next to the new ATL wing with free parking after 4PM even when there is a basketball game on campus.