Speaker
Tim Huege
(KIT)
Description
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 first principles. 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 predicted by CoREAS revealed a discrepancy
in the order of a factor of two. A re-measurement of the reference calibration
source, now performed for the free field, was recently done by the manufacturer.
These updated calibration values lead to a lowering of the reconstructed
electric field measured by LOPES and therefore a significantly better agreement
with the simulations. We will discuss the updated calibration and its impact on
the LOPES analysis results.
| Registration number following "ICRC2015-I/" | 326 |
|---|---|
| Collaboration | LOPES |
Authors
Katrin Link
(Karlsruhe Institute of Technology)
Tim Huege
(KIT)
