Speakers
Mr
Daniel Huber
(KIT)
Dr
Tim Huege
(Karlsruhe Institute of Technology)
Description
The LOPES experiment was a radio interferometer built at the existing air shower array
KASCADE-Grande in Karlsruhe, Germany. The last configuration of LOPES was called LOPES-3D and
consisted of ten tripole antennas. Each of these antennas consisted of three crossed dipoles east-west, north-south
and vertically aligned. With this, LOPES-3D had the unique possibility to study the benefits of additional, direct
measurements with vertically aligned antennas in the environment of the well understood and calibrated particle
detector array KASCADE-Grande. The measurements with three spacial coincident antennas led to a redundant
reconstruction of the E-field vector. Thus, several methods to exploit the redundancy were developed and tested.
Furthermore, for the first time, the background noise could be studied polarization- and direction dependent.
With LOPES-3D it could be demonstrated that radio detection reaches a higher efficiency for inclined showers
and that the vertical component gets more important for the measurement of inclined showers.
In this contribution we discuss the development of different weighting schemes for the best combination of the
three redundant reconstructed E-field vectors. Furthermore we discuss the influence of these weighting schemes
on the ability to reconstruct the showers in radio and on the geometry reconstruction. We show an estimate of the
radio efficiency for inclined showers with focus on the benefits of measurements with vertically aligned
antennas and we present the direction dependent noise in the different polarizations.
Primary author
Mr
Daniel Huber
(KIT)
Co-author
Dr
Tim Huege
(Karlsruhe Institute of Technology)
