1. Particle Physics Seminar

    "A method for obtaining first interaction length distribution and its interpretation for extensive air showers seen by Pierre Auger Observatory"

    Presented by Tolga Yapici, Michigan Technological University

    Thursday, November 14, 2013, 3 pm
    Small Seminar Room, Bldg. 510

    Hosted by: David Jaffe

    The Pierre Auger Observatory is the world's largest cosmic ray observatory. It provides unique opportunities for understanding physics on the different scales. Large scale ani-sotropies and the energy spectrum are among the important results published by the ob-servatory. Recently, the distribution of depth of shower maximum of extensive air show-ers was analyzed for p-Air cross-section at 1018.25 eV. The limitations such as duty cycle hinders retrieving more information from the fluorescent telescopes. Other component of the observatory, surface detector, has almost 100% duty cycle. Thus, we attempted to develop a surface detector based method for finding the cross-section. In the first part of the talk, I will introduce the experiment and its main components. Then, in the second part, I will briefly describe the recent results published about p-Air cross-section. I will also discuss the method which we developed. Lastly, I will review the elec-tronics being developed for communication systems of the Pierre Auger Observatory Research and Development Array.