458 research outputs found
Some possible interpretations from data of the CODALEMA experiment
The purpose of the CODALEMA experiment, installed at the Nan\c{c}ay Radio
Observatory (France), is to study the radio-detection of ultra-high energy
cosmic rays in the energy range of . Distributed over an
area of 0.25 km, the original device uses in coincidence an array of
particle detectors and an array of short antennas, with a centralized
acquisition. A new analysis of the observable in energy for radio is presented
from this system, taking into account the geomagnetic effect. Since 2011, a new
array of radio-detectors, consisting of 60 stand-alone and self-triggered
stations, is being deployed over an area of 1.5 km around the initial
configuration. This new development leads to specific constraints to be
discussed in term of recognition of cosmic rays and in term of analysis of
wave-front.Comment: 13 pages, 12 figures Proceeding of the ARENA2012 conference,
Erlangen, Germany To be published in AI
Radio Detection of Cosmic Ray Air Showers with Codalema
Studies of the radio detection of Extensive Air Showers is the goal of the
demonstrative experiment CODALEMA. Previous analysis have demonstrated that
detection around eV was achieved with this set-up. New results
allow for the first time to study the topology of the electric field associated
to EAS events on a event by event basis.Comment: 6 pages, 4 figures Proceedings of the Rencontres de Moriond, Very
High Energy Phenomena in the Universe, La Thuile, Italy (March 12-19, 2005
Radio Detection of Extensive Air Showers with CODALEMA
The principle and performances of the CODALEMA experimental device, set up to
study the possibility of high energy cosmic rays radio detection, are
presented. Radio transient signals associated to cosmic rays have been
identified, for which arrival directions and shower's electric field topologies
have been extracted from the antenna signals. The measured rate, about 1 event
per day, corresponds to an energy threshold around 5.10^16 eV. These results
allow to determine the perspectives offered by the present experimental design
for radiodetection of UHECR at a larger scale.Comment: 4 pages and 3 figures. To appear in the Proceedings of the 29th ICRC,
Pune (2005
Radio Detection of Cosmic Ray Extensive Air Showers: present status of the CODALEMA experiment
Data acquisition and analysis for the CODALEMA experiment, in operation for
more than one year, has provided improved knowledge of the characteristics of
this new device. At the same time, an important effort has been made to develop
processing techniques for extracting transient signals from data containing
interference.Comment: september 200
Radiodetection of Cosmic Ray Extensive Air Showers
We present the characteristics and performance of a demonstration experiment
devoted to the observation of ultra high- energy cosmic ray extensive air
showers using a radiodetection technique. In a first step, one antenna narrowed
band filtered acting as trigger, with a 4 threshold above sky
background-level, was used to tag any radio transient in coincidence on the
antenna array. Recently, the addition of 4 particle detectors has allowed us to
observe cosmic ray events in coincidence with antennas
Radioelectric Field Features of Extensive Air Showers Observed with CODALEMA
Based on a new approach to the detection of radio transients associated with
extensive air showers induced by ultra high energy cosmic rays, the
experimental apparatus CODALEMA is in operation, measuring about 1 event per
day corresponding to an energy threshold ~ 5. 10^16 eV. Its performance makes
possible for the first time the study of radio-signal features on an
event-by-event basis. The sampling of the magnitude of the electric field along
a 600 meters axis is analyzed. It shows that the electric field lateral spread
is around 250 m (FWHM). The possibility to determine with radio both arrival
directions and shower core positions is discussed.Comment: Accepted for publication in Astroparticle Physic
Radio Detection of Cosmic Ray Air Shower by the CODALEMA Experiment
The possibilities of measuring Extremely High Energy Cosmic Rays (EHECR) by
radio detection of electromagnetic pulses radiated during the development of
extensive air showers in the atmosphere are investigated. We present the
demonstrative CODALEMA experiment, set up at Nancay Radio-Observatory (France).
The radio-decametric array has been adapted to measure radio transients in time
coincidence between antennas.Comment: 4 pages, 4 figures, Proceedings of the 9th Pisa Meeting on Advanced
Detectors, Isola d'Elba 2003, to be published in NIM
Development of a radio detection array for the observation of showers induced by UHE Tau neutrinos
International audienceDevelopment of a radio detection array for the observation of showers induced by UHE Tau neutrino
CODALEMA: a cosmic ray air shower radio detection experiment
International audienceThe CODALEMA experimental device currently detects and characterizes the radio contribution of cosmic ray air showers : arrival directions and electric field topologies of radio transient signals associated to cosmic rays are extracted from the antenna signals. The measured rate, about 1 event per day, corresponds to an energy threshold around 5.10eV. These results allow to determine the perspectives offered by the present experimental design for radiodetection of Ultra High Energy Cosmic Rays at a larger scale
The TIANSHAN Radio Experiment for Neutrino Detection
An antenna array devoted to the autonomous radio-detection of high energy
cosmic rays is being deployed on the site of the 21 cm array radio telescope in
XinJiang, China. Thanks in particular to the very good electromagnetic
environment of this remote experimental site, self-triggering on extensive air
showers induced by cosmic rays has been achieved with a small scale prototype
of the foreseen antenna array. We give here a detailed description of the
detector and present the first detection of extensive air showers with this
prototype.Comment: 37 pages, 15 figures. Astroparticle Physics (in press
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