24,591 research outputs found
Geomagnetic effects observed by the Codalema experiment
No full text6 pagesInternational audienceThe CODALEMA experiment is measuring transient radio emissions associated to extended air showers produced by high energy cosmic rays. The experimental setup installed at the Nancay Radio Observatory in France has recently undergone hardware upgrades and an extension of the surfaces covered by both the antenna and the scintillator detector arrays. The experimental data allow to investigate the main features of these radio signals and the underlying electric field production mechanisms. Some of the latest experimental results of CODALEMA are presented. They have been analyzed assuming a linear dependence of the electric field with respect to v ^ B. Within the CODALEMA observation conditions at Nancay, the detection eficiency, the arrival direction distribution and the polarity of the radio signals can be interpreted in terms of a geomagnetic effect. A R&D effort is currently underway to develop the hardware elements for the deployment of a large detector array based on active antennas. The main features of the first prototype of the CODALEMA autonomous station are briefly described
Investigating the extensive air shower properties: Tackling the challenges of the next generation cosmic ray observatory with the CODALEMA experiment
No full textInternational audienceOur knowledge on ultra-high energy cosmic rays and their underlying sources and acceleration mechanisms is steadily improving thanks to the large observatories nowadays in operation. However the need for a next generation instrument is emerging from their experimental limitations and the scientific questions currently out of reach within a reasonable time line. Within this scope, the main features of the radio detection of extensive air showers are investigated and confronted to these challenging requirements. CODALEMA is the last experiment currently running in Europe dedicated to the cosmic ray detection using the observation of its induced radio electric field. The latest experimental upgrade and the synthesis of its operation features and the upcoming technical developments are presented. The main results of CODALEMA will be presented with special emphasis put on some of the new aspects of the data analysis offered by the CODALEMA3 autonomous station array. Finally, the opportunities provided by the Nancay observatory for efficient R&D activities and especially the upcoming technical developments are listed. (C) 2013 Elsevier B.V. All rights reserved
Investigating the extensive air shower properties: Tackling the challenges of the next generation cosmic ray observatory with the CODALEMA experiment
No full textConférenceInternational audienceOur knowledge on ultra-high energy cosmic rays and their underlying sources and acceleration mechanisms is steadily improving thanks to the large observatories nowadays in operation. However the need for a next generation instrument is emerging from their experimental limitations and the scientific questions currently out of reach within a reasonable time line. Within this scope, the main features of the radio detection of extensive air showers are investigated and confronted to these challenging requirements. CODALEMA is the last experiment currently running in Europe dedicated to the cosmic ray detection using the observation of its induced radio electric field. The latest experimental upgrade and the synthesis of its operation features and the upcoming technical developments are presented. The main results of CODALEMA will be presented with special emphasis put on some of the new aspects of the data analysis offered by the CODALEMA3 autonomous station array. Finally, the opportunities provided by the Nancay observatory for efficient R&D activities and especially the upcoming technical developments are listed. (C) 2013 Elsevier B.V. All rights reserved
Investigating the extensive air shower properties: Tackling the challenges of the next generation cosmic ray observatory with the CODALEMA experiment
No full textConférenceInternational audienceOur knowledge on ultra-high energy cosmic rays and their underlying sources and acceleration mechanisms is steadily improving thanks to the large observatories nowadays in operation. However the need for a next generation instrument is emerging from their experimental limitations and the scientific questions currently out of reach within a reasonable time line. Within this scope, the main features of the radio detection of extensive air showers are investigated and confronted to these challenging requirements. CODALEMA is the last experiment currently running in Europe dedicated to the cosmic ray detection using the observation of its induced radio electric field. The latest experimental upgrade and the synthesis of its operation features and the upcoming technical developments are presented. The main results of CODALEMA will be presented with special emphasis put on some of the new aspects of the data analysis offered by the CODALEMA3 autonomous station array. Finally, the opportunities provided by the Nancay observatory for efficient R&D activities and especially the upcoming technical developments are listed. (C) 2013 Elsevier B.V. All rights reserved
Investigating the extensive air shower properties: Tackling the challenges of the next generation cosmic ray observatory with the CODALEMA experiment
No full textConférenceInternational audienceOur knowledge on ultra-high energy cosmic rays and their underlying sources and acceleration mechanisms is steadily improving thanks to the large observatories nowadays in operation. However the need for a next generation instrument is emerging from their experimental limitations and the scientific questions currently out of reach within a reasonable time line. Within this scope, the main features of the radio detection of extensive air showers are investigated and confronted to these challenging requirements. CODALEMA is the last experiment currently running in Europe dedicated to the cosmic ray detection using the observation of its induced radio electric field. The latest experimental upgrade and the synthesis of its operation features and the upcoming technical developments are presented. The main results of CODALEMA will be presented with special emphasis put on some of the new aspects of the data analysis offered by the CODALEMA3 autonomous station array. Finally, the opportunities provided by the Nancay observatory for efficient R&D activities and especially the upcoming technical developments are listed. (C) 2013 Elsevier B.V. All rights reserved
Charge excess signature in the CODALEMA data. Interpretation with SELFAS2
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First results of the Standalone Antenna Array of the CODALEMA Radio Detection Experiment
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Detection and characterization of the cosmic ray air shower radio emission with the CODALEMA experiment
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