IceCube Collaboration, paper 899, these proceedings

IceCube Collaboration, paper 379, these proceedings

for the IceCube Coll

IceCube Collaboration, paper 923, these proceedings

IceCube Collaboration, paper 838, these proceedings

IceCube Collaboration, paper 323, these proceedings

IceCube Collaboration, paper 939, these proceedings

IceCube Collaboration, paper 735, these proceedings

IceCube Collaboration, papers 305, 306, 308, these proceedings

IceCube Collaboration, papers 85, 662, these proceedings. 4 32ND INTERNATIONAL COSMIC RAY CONFERENCE, BEIJING 2011 Cosmic Ray Composition from the 40-string IceCube/IceTop Detectors THE ICECUBE COLLABORATION1 1 See special section in these proceedings Abstract: The IceCube Observatory at the South Pole is composed of a deep detector and a surface detector, IceTop, both of which use Cherenkov light to detect charged particles. Cosmic ray air showers contain multiple particle components: in particular, electrons and muons detectable at the surface by IceTop, and high-energy muons detectable by the deep IceCube detector, in relative amounts that depend on the primary cosmic ray mass. Thus, coincident events can be used to measure both the energy and the mass composition. Here, a neural network is trained with simulations to map observables from the two detectors (input) into energy and mass estimators (output). Experimental data is then run through the same network, to measure the energy spectrum and average logarithmic mass of cosmic rays in the energy range of about 1-30 PeV. Corresponding authors: (karen.andeen@icecube.wisc.edu), K. Rawlins3, T. Feusels4 2 Dept of Physics, University of Wisconsin-Madison, WI 53706, USA (now at Rutgers University) 3 Dept. of Physics and Astronomy, University of Alaska Anchorage, AK 99508, USA 4 Dept. of Physics and Astronomy, Gent University, B-9000 Gent, Belgium Keywords: mass

composition

knee

IceCube

IceTop