Skip to Main content Skip to Navigation
Theses

Radiodétection et caractérisation de l'émission radio des gerbes cosmiques d'énergie supérieure à 10^16 eV avec l'expérience CODALEMA

Abstract : Ultra high energy cosmic rays, extraterrestrial particles which nature and origin remain today uncertain, are ordinarily studied by using two major techniques of EAS (Extensive Air Shower) detection: ground particles detectors or fluorescence light telescopes. Appeared for the first time in the 60', researches on EAS radiodetection by measuring the electric field induced by shower's charged particles was first stopped because of technical difficulties. With the developpement of fast electronic, radiodetection technique became again potentially interesting for cosmic rays study. The CODALEMA experiment, since 2002, use and improve the radiodetection method. These last years, the experimental setup was largely modified, original log-periodic antennas were replaced by active dipole dedicated to radiodetection and the trigger, realized by an array of 17 scintillators, allow now to estimate the primary cosmic ray energy. Present objective of CODALEMA is to characterize the electric signal induced by an EAS, according to the physical parameters of the shower. In this thesis the main results obtain by CODALEMA are presented. The evidences for a geomagnetic origin of EAS radioelectric field is one of the more important. Moreover a first study of electric field lateral distribution functions and the correlation between the primary particle energies with the amplitude of the EAS electric field are also discussed.
Complete list of metadatas

Cited literature [38 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00448700
Contributor : Lilian Martin <>
Submitted on : Tuesday, January 19, 2010 - 5:47:10 PM
Last modification on : Friday, June 22, 2018 - 9:34:42 AM
Long-term archiving on: : Thursday, June 17, 2010 - 9:02:42 PM

Identifiers

  • HAL Id : tel-00448700, version 1

Citation

T. Saugrin. Radiodétection et caractérisation de l'émission radio des gerbes cosmiques d'énergie supérieure à 10^16 eV avec l'expérience CODALEMA. Cosmologie et astrophysique extra-galactique [astro-ph.CO]. Université de Nantes, 2008. Français. ⟨tel-00448700⟩

Share

Metrics

Record views

372

Files downloads

1467