4 Conferences false [["minutes", "Minutes"], ["1", "More information about the venue"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]] ICN-UNAM 1482bc95ee34f0461176da21871284c8 3 icrc2007@icrc2007.unam.mx The 30th International Cosmic Ray Conference will be held from July 3, 2007 to July 11, 2007 in Merida, Yucatan, Mexico. True Merida, Mexico

2007-07-03T08:00:00 2007-07-11T19:00:00 2005-09-26T05:04:53 2024-04-12T17:46:55 Mexico/General IGeof-UNAM 40af9343b8bb9d18708b4f0252d5f53c 1139 false [["minutes", "Minutes"], ["1", "More information about the venue"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]] 073 (4A) HE.2.4 1 Poster Institute for Nuclear Research of the Russian Academy of Sciences 7c7bd199074b8d9a6d56d11aec28efa5 Institute for Nuclear Research of the Russian Academy of Sciences 7c7bd199074b8d9a6d56d11aec28efa5 Kansas University bbf8c0056bad3f2e00e33f45dcf6d57c Institute for Nuclear Research of the Russian Academy of Sciences 3818ccc27bfb9a831157dfc9da3a8aa7 Department of Physics, Moscow State University 786665c563e45cf6ab59aba0fc29bbd8 Institute for Nuclear Research of the Russian Academy of Sciences c8d14670424e1412823c05015158fbcf Merida, Mexico

Regency (Hyatt) 2007-07-09T14:45:00 2007-07-09T14:45:00 Radio signals produced in ice by electromagnetic cascades with energies up to 10^15 eV have been calculated. Simulations of cascades were performed using the SIMEX Code System. The simulation results in the matrix form, which described the charge excess evolution, were used to calculate coherent Cherenkov radio field from electromagnetic cascades. Comparison with results received in the frameworks of the GEANT-4 Code System was made. A new algorithm was also developed to simulate radio signals produced by extremely high energy (up to 10^21 eV) electron-photon and electron-hadron cascades in dense media. The base of the algorithm is a multilevel numerical scheme. The Migdal cross-sections are used to take into account the Landau- Pomeranchuk-Migdal (LPM) effect. Initially a Monte Carlo approach is used at the single particle level. When number of particles in a cascade increases up to 100-1000 transport equations are used. The main goal is calculations of the source functions – numbers of electrons and photons with low energies ( below some threshold energy, which may be chosen as 10 GeV) produced in EHE cascade. For these low energy particles, the 3-dimensional cascades should be simulated in advance by Monte Carlo method with the use of the GEANT-4 or SIMEX codes. The 3-dimensional cascade profiles and signal profiles should be estimated and stored in some data base library for maximal CPU efficiency. At the last step the lateral and angular distributions of negative and positive charges in the EHE cascade can be estimated as a sum of known charge distributions in low energy cascades taking into account the source functions. Finally, with the use of this sum the radio signal produced in the EHE cascade may be estimated. paper doc http://indico.nucleares.unam.mx/images/word.png word file ppt http://indico.nucleares.unam.mx/images/powerpoint.png powerpoint file pdf http://indico.nucleares.unam.mx/images/pdf_small.png pdf file odt http://indico.nucleares.unam.mx/images/writer.png writer file odp http://indico.nucleares.unam.mx/images/impress.png presentation file ods http://indico.nucleares.unam.mx/images/calc.png spreadsheet file other http://indico.nucleares.unam.mx/images/file_small.png unknown type file link http://indico.nucleares.unam.mx/images/link.png link 1 http://www.icrc2007.unam.mx/ link http://www.icrc2007.unam.mx/ doc http://indico.nucleares.unam.mx/images/word.png word file ppt http://indico.nucleares.unam.mx/images/powerpoint.png powerpoint file pdf http://indico.nucleares.unam.mx/images/pdf_small.png pdf file odt http://indico.nucleares.unam.mx/images/writer.png writer file odp http://indico.nucleares.unam.mx/images/impress.png presentation file ods http://indico.nucleares.unam.mx/images/calc.png spreadsheet file other http://indico.nucleares.unam.mx/images/file_small.png unknown type file link http://indico.nucleares.unam.mx/images/link.png link