Cosmic Ray Measurements with LOPES: Status and Recent Results (ARENA 2012)
Abstract
LOPES is a digital antenna array at the Karlsruhe Institute of Technology, Germany, for cosmic-ray air-shower measurements. Triggered by the co-located KASCADE-Grande air-shower array, LOPES detects the radio emission of air showers via digital radio interferometry. We summarize the status of LOPES and recent results. In particular, we present an update on the reconstruction of the primary-particle properties based on almost 500 events above 100 PeV. With LOPES, the arrival direction can be reconstructed with a precision of at least 0.65{\deg}, and the energy with a precision of at least 20 %, which, however, does not include systematic uncertainties on the absolute energy scale. For many particle and astrophysics questions the reconstruction of the atmospheric depth of the shower maximum, Xmax, is important, since it yields information on the type of the primary particle and its interaction with the atmosphere. Recently, we found experimental evidence that the slope of the radio lateral distribution is indeed sensitive to the longitudinal development of the air shower, but unfortunately, the Xmax precision at LOPES is limited by the high level of anthropogenic radio background. Nevertheless, the developed methods can be transferred to next generation experiments with lower background, which should provide an Xmax precision competitive to other detection technologies.
Keywords
Cite
@article{arxiv.1301.2557,
title = {Cosmic Ray Measurements with LOPES: Status and Recent Results (ARENA 2012)},
author = {F. G. Schröder and W. D. Apel and J. C. Arteaga and L. Bähren and K. Bekk and M. Bertaina and P. L. Biermann and J. Blümer and H. Bozdog and I. M. Brancus and A. Chiavassa and K. Daumiller and V. de Souza and F. Di Pierro and P. Doll and R. Engel and H. Falcke and B. Fuchs and D. Fuhrmann and H. Gemmeke and C. Grupen and A. Haungs and D. Heck and J. R. Hörandel and A. Horneffer and D. Huber and T. Huege and P. G. Isar and K. -H. Kampert and D. Kang and O. Krömer and J. Kuijpers and K. Link and P. Luczak and M. Ludwig and H. J. Mathes and M. Melissas and C. Morello and J. Oehlschläger and N. Palmieri and T. Pierog and J. Rautenberg and H. Rebel and M. Roth and C. Rühle and A. Saftoiu and H. Schieler and A. Schmidt and O. Sima and G. Toma and G. C. Trinchero and A. Weindl and J. Wochele and J. Zabierowski and J. A. Zensus},
journal= {arXiv preprint arXiv:1301.2557},
year = {2013}
}
Comments
The following article has been accepted by AIP Conference Proceedings. Proceedings of ARENA 2012, Erlangen, Germany; to appear on http://proceedings.aip.org/