Revised absolute amplitude calibration of the LOPES experiment
Abstract
One of the main aims of the LOPES experiment was the evaluation of the absolute amplitude of the radio signal of air showers. This is of special interest since the radio technique offers the possibility for an independent and highly precise determination of the energy scale of cosmic rays on the basis of signal predictions from Monte Carlo simulations. For the calibration of the amplitude measured by LOPES we used an external source. Previous comparisons of LOPES measurements and simulations of the radio signal amplitude predicted by CoREAS revealed a discrepancy of the order of a factor of two. A re-measurement of the reference calibration source, now performed for the free field, was recently performed by the manufacturer. The updated calibration values lead to a lowering of the reconstructed electric field measured by LOPES by a factor of and therefore to a significantly better agreement with CoREAS simulations. We discuss the updated calibration and its impact on the LOPES analysis results.
Keywords
Cite
@article{arxiv.1508.03471,
title = {Revised absolute amplitude calibration of the LOPES experiment},
author = {K. Link and T. Huege and W. D. Apel and J. C. Arteaga-Velázquez and L. Bähren and K. Bekk and M. Bertaina and P. L. Biermann and J. Blümer and H. Bozdog and I. M. Brancus and E. Cantoni 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 H. Gemmeke and C. Grupen and A. Haungs and D. Heck and R. Hiller and J. R. Hörandel and A. Horneffer and D. Huber and P. G. Isar and K-H. Kampert and D. Kang and O. Krömer and J. Kuijpers and P. Łuczak 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 S. Schoo and F. G. Schröder 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:1508.03471},
year = {2015}
}
Comments
Proceedings of the 34th ICRC, The Hague, The Netherlands, PoS(ICRC2015)311