An in-situ calibration of a logarithmic periodic dipole antenna with a frequency cover- age of 30 MHz to 80 MHz is performed. Such antennas are part of a radio station system used for detection of cosmic ray induced air showers at the Engineering Radio Array of the Pierre Auger Observatory, the so-called Auger Engineering Radio Array (AERA). The directional and frequency characteristics of the broadband antenna are investigated using a remotely piloted aircraft carrying a small transmitting antenna. The antenna sensitivity is described by the vector effective length relating the measured voltage with the electric-field components perpendicular to the incoming signal direction. The horizontal and meridional components are determined with an overall un- certainty of 7 . 4 + 0 . 9 − 0 . 3 % and 10 . 3 + 2 . 8 − 1 . 7 % respectively. The measurement is used to correct a simulated response of the frequency and directional response of the antenna. In addition, the influence of the ground conductivity and permittivity on the antenna response is simulated. Both have a negligible influence given the ground conditions measured at the detector site. The overall uncertainties of the vector effective length components result in an uncertainty of 8 . 8 + 2 . 1 − 1 . 3 % in the square root of the energy fluence for incoming signal directions with zenith angles smaller than 60 ◦ .

Calibration of the logarithmic-periodic dipole antenna (LPDA) radio stations at the Pierre Auger Observatory using an octocopter

G. A. Anastasi;M. Buscemi;R. Caruso;A. Insolia;D. Lo Presti;V. Pirronello;F. Zuccarello
2017-01-01

Abstract

An in-situ calibration of a logarithmic periodic dipole antenna with a frequency cover- age of 30 MHz to 80 MHz is performed. Such antennas are part of a radio station system used for detection of cosmic ray induced air showers at the Engineering Radio Array of the Pierre Auger Observatory, the so-called Auger Engineering Radio Array (AERA). The directional and frequency characteristics of the broadband antenna are investigated using a remotely piloted aircraft carrying a small transmitting antenna. The antenna sensitivity is described by the vector effective length relating the measured voltage with the electric-field components perpendicular to the incoming signal direction. The horizontal and meridional components are determined with an overall un- certainty of 7 . 4 + 0 . 9 − 0 . 3 % and 10 . 3 + 2 . 8 − 1 . 7 % respectively. The measurement is used to correct a simulated response of the frequency and directional response of the antenna. In addition, the influence of the ground conductivity and permittivity on the antenna response is simulated. Both have a negligible influence given the ground conditions measured at the detector site. The overall uncertainties of the vector effective length components result in an uncertainty of 8 . 8 + 2 . 1 − 1 . 3 % in the square root of the energy fluence for incoming signal directions with zenith angles smaller than 60 ◦ .
2017
Antennas; Detector alignment and calibration methods (lasers, sources, particle- beams); Large detector systems for particle and astroparticle physics; Particle detectors
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/317099
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