University of Maryland
Atlantic Building, Room 2400
4:30 PM Monday, April 23, 2007
Coffee, Tea & Snacks 4:15-4:30 PM

Vladimir Ptuskin
Cosmic Ray Origin in SNR Shocks and Transport in the Galaxy

Most cosmic rays in the Galaxy are thought to be accelerated by the shocks of supernova explosions. We discuss the acceleration of galactic cosmic rays in supernova remnants in a general context of the problem of cosmic-ray origin. The model of cosmic ray propagation in the Galaxy, the nature of the "knee" in the cosmic ray spectrum, and the origin of the highest energy events in cosmic rays are discussed.

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.