INVESTIGADORES
WAHLBERG Hernan Pablo
artículos
Título:
Results of a self-triggered prototype system for radio-detection of extensive air showers at the Pierre Auger Observatory
Autor/es:
PIERRE AUGER COLLABORATION (PEDRO ABREU ET AL.). H. WAHLBERG
Revista:
JOURNAL OF INSTRUMENTATION
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2012 vol. 7 p. 11023 - 11033
ISSN:
1748-0221
Resumen:
We describe the experimental setup and the results of RAuger, a small
radio-antenna array, consisting of three fully autonomous and
self-triggered radio-detection stations, installed close to the center
of the Surface Detector (SD) of the Pierre Auger Observatory in
Argentina. The setup has been designed for the detection of the electric
field strength of air showers initiated by ultra-high energy cosmic
rays, without using an auxiliary trigger from another detection system.
Installed in December 2006, RAuger was terminated in May 2010 after 65
registered coincidences with the SD. The sky map in local angular
coordinates (i.e., zenith and azimuth angles) of these events reveals a
strong azimuthal asymmetry which is in agreement with a mechanism
dominated by a geomagnetic emission process. The correlation between the
electric field and the energy of the primary cosmic ray is presented
for the first time, in an energy range covering two orders of magnitude
between 0.1 EeV and 10 EeV. It is demonstrated that this setup is
relatively more sensitive to inclined showers, with respect to the SD.
In addition to these results, which underline the potential of the
radio-detection technique, important information about the general
behavior of self-triggering radio-detection systems has been obtained.
In particular, we will discuss radio self-triggering under varying local
electric-field conditions.