University of Maryland
Atlantic Building, Room 2400
4:30 PM Monday, September 29, 2008
Coffee, Tea & Snacks 4:15-4:30 PM

Hoseok Ahn
University of Maryland
Advanced Thin Ionization Calorimeter (ATIC) Long-Duration Balloon Experiment

ATIC is a balloon-borne experiment designed to investigate the composition and energy spectra of cosmic rays of charge Z = 1 to 26 over an energy range from ~100 GeV to ~100 TeV. The instrument consists of a silicon charge detector, plastic scintillator hodoscopes interleaved with graphite interaction targets, and an 18 radiation-length deep, fully-active bismuth germanate (BGO) calorimeter. ATIC has had three successful long-duration balloon (LDB) flights launched from McMurdo station, Antarctica in 2000, 2002, and 2007. In this seminar, the details of the ATIC experiment and its Antarctic campaigns will be described, and various analysis results from the first two flights will be presented.

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.