Radio emission of energetic cosmic ray air showers: Polarization measurements with LOPES

Isar, P. G.; Apel, W. D.; Arteaga, J. C.; Asch, T.; Auffenberg, J.; Badea, F.; Bahren, L.; Bekk, K.; Bertaina, Mario Edoardo; Biermann, P. L.; Blumer, J.; Bozdog, H.; Brancus, I. M.; Bruggemann, M.; Buchholz, P.; Buitink, S.; Cantoni, Elena Carla; Chiavassa, Andrea; Cossavella, F.; Daumiller, K.; Souza, V. d.; DI PIERRO, Federico; Doll, P.; Engel, R.; Falcke, H.; Finger, M.; Fuhrmann, D.; Gemmeke, H.; Ghia, P. L.; Glasstetter, R.; Grupen, C.; Haungs, A.; Heck, D.; Horandel, J. R.; Horneffer, A.; Huang, X.; Huege, T.; Kampert, K. H.; Kang, D.; Kickelbick, D.; Kolotaev, Y.; Kromer, O.; Kuijpers, J.; Lafebre, S.; Luczak, P.; Mathes, H. J.; Mayer, H. J.; Milke, J.; Mitrica, B.; Morello, C.; Navarra, Gianni Maria; Nehls, S.; Nigl, A.; Oehlschlager, J.; Over, S.; Petcu, M.; Pierog, T.; Rautenberg, J.; Rebel, H.; Roth, M.; Saftoiu, A.; Schieler, H.; Schmidt, A.; Schroder, F.; Sima, O.; Singh, K.; Stumpert, M.; Toma, G.; Trinchero, G. C.; Ulrich, H.; Walkowiak, W.; Weindl, A.; Wochele, J.; Wommer, M.; Zabierowski, J.; Zensus, J. A.

doi:10.1016/j.nima.2009.03.118

LOPES is a radio antenna array co-located with the Karlsruhe Shower Core and Array DEtector, KASCADE-Grande in Forschungszentrum Karlsruhe, Germany, which provides well-calibrated trigger information and air shower parameters for primary energies up to 10(18) eV. By the end of 2006, the radio antennas were re-configured to perform polarization measurements of the radio signal of cosmic ray air showers, recording in the same time both, the East-West and North-South polarization directions of the radio emission. The main goal of these measurements is to reconstruct the polarization characteristics of the emitted signal, This will allow a detailed comparison with theoretical predictions. The current status of these measurements is reported here. (C) 2009 Elsevier B.V. All rights reserved.