Stockholm physics colloquium
The Pierre Auger Observatory and the highest
energy cosmic rays.
Dr. Julio Rodriguez Martino, INFN - Sezione di Roma II, Rome, Italy.
Place: Oskar Klein auditorium, AlbaNova main building, level 4, on Thursday, November 4th, 15.15
On the vast plain known as Pampa Amarilla in western Argentina, the Pierre Auger Cosmic Ray Observatory has begun its study of the universe’s highest energy particles (above 10^20 eV).Experiments have so far failed to establish their physical properties and their existence has become a profound puzzle.
In order to record a large number of these cosmic rays for statistical analyses, a detection area of 3000 square kilometers will be used. The primary energetic cosmic ray collides with a nucleus in the atmosphere above this area, creating many secondary particles. These ”extensive air showers” will be monitored by 1600 surface detectors and 24 fluorescence detectors, of which 500 and 12, respectively, are already taking data.
A description of the physical principles involved in the detection will be given, together with the details of how such a huge detector is being built. The capabilities of the observatory for determining the possible origin and composition of these cosmic rays will also be discussed.
Coffee will be served before the talk.
Claes Fransson, Jouko Mickelsson
Welcome to the Wireless@KTH Friday Seminar
”Where are the wireless investment
Magnus Melander, BrainHeart Capital
12 November at 14.30
Wireless@KTH, Isafjordsgatan 30b, Kista
Read more: http://www.wireless.kth.se