Abstract
The shape of the radio wavefront can be probed with pulse arrival time measurements in individual antennas. So far, the radio wavefront has not been investigated in detail. It does not necessarily have to follow the shape of the particle front (pancake), since the radio emission arises as a coherent sum over the entire shower development. In the LOPES beamforming of the standard analysis pipeline, a spherical wavefront is assumed. Furthermore, also a theoretical study based on REAS2 assumed a spherical wavefront [6]. However, already in Ref. [9] it was noticed that a spherical wavefront does not perfectly describe the LOPES measurements, and that the angular resolution of LOPES is limited to ~1° due to the limited knowledge of the exact wavefront shape.
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Notes
- 1.
A summary of this chapter is published in Proceedings of the 32nd International Cosmic Ray Conference 2011, Beijing, China, Volume 3, #0313 [13].
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Schröder, F.G. (2012). Pulse Arrival Time Distributions. In: Instruments and Methods for the Radio Detection of High Energy Cosmic Rays. Springer Theses. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33660-7_8
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DOI: https://doi.org/10.1007/978-3-642-33660-7_8
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