BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Measurements of High-Energy Heavy Nuclei with the CREAM-I TRD DTSTART;VALUE=DATE-TIME:20070706T133000Z DTEND;VALUE=DATE-TIME:20070706T134200Z DTSTAMP;VALUE=DATE-TIME:20260613T220130Z UID:indico-contribution-91-0-590@cern.ch DESCRIPTION:Speakers: Prof. WAKELY\, Scott (University of Chicago)\nThe ba lloon-borne cosmic-ray experiment CREAM-I (Cosmic-Ray Energetics And Mass) \ncompleted a successful 42-day flight during the 2004-2005 NASA/NSF/NSBF Antarctic\nexpedition. CREAM-I combines an imaging calorimeter with charge detectors and a\nprecision transition radiation detector (TRD). The TRD c omponent of CREAM-I is\ntargeted at measuring the energy of cosmic-ray par ticles with charges greater than\nZ~3. A central science goal of this effo rt is the determination of the ratio of\nsecondary to primary nuclei at hi gh energy. This measurement is crucial for the\nreconstruction of the prop agation history of cosmic rays and consequently\, for the\ndetermination o f their source spectra. Initial results from the TRD portion of the\nscien ce stack will be presented.\n\nhttps://indico.nucleares.unam.mx/event/4/se ssion/91/contribution/590 LOCATION:Merida\, Mexico Kabah (Holiday Inn) URL:https://indico.nucleares.unam.mx/event/4/session/91/contribution/590 END:VEVENT BEGIN:VEVENT SUMMARY:Propagation of UHE protons through a magnetized large scale struct ure DTSTART;VALUE=DATE-TIME:20070706T134200Z DTEND;VALUE=DATE-TIME:20070706T135400Z DTSTAMP;VALUE=DATE-TIME:20260613T220130Z UID:indico-contribution-91-0-418@cern.ch DESCRIPTION:Speakers: Prof. KANG\, Hyesung (Pusan National University\, Pu san\, Korea)\nThe propagation of UHECRs is affected by the intergalactic m agnetic\nfield that was produced during the course of the large scale stru cture\nformation of the universe. Adopting a novel model based on turbule nt\ndynamo\, the strength of the intergalactic magnetic field is estimated \nfrom local dynamic properties of the gas flows in hydrodynamic\nsimulati ons of a concordance LCDM universe. The direction of the\nmagnetic field i s taken as that of the passively evolved field. With\nthe model magnetic field\, the deflection angle and time delay are\ncalculated for protons wi th E > 10^19 eV propagating through the large\nscale structure of the univ erse\, as well as the energy loss due to\ninteractions with cosmic backgro und radiation. Implications of this\nstudy on the origin of UHECRs are di scussed.\n\nThis work is supported by KOSEF through the Astrophysical Rese arch Center\nfor the Structure and Evolution of Cosmos (ARCSEC).\n\nhttps: //indico.nucleares.unam.mx/event/4/session/91/contribution/418 LOCATION:Merida\, Mexico Kabah (Holiday Inn) URL:https://indico.nucleares.unam.mx/event/4/session/91/contribution/418 END:VEVENT BEGIN:VEVENT SUMMARY:The misleading nature of the leaky box models in cosmic ray physic s DTSTART;VALUE=DATE-TIME:20070706T135400Z DTEND;VALUE=DATE-TIME:20070706T140600Z DTSTAMP;VALUE=DATE-TIME:20260613T220130Z UID:indico-contribution-91-0-705@cern.ch DESCRIPTION:Speakers: Dr. CODINO\, Antonio (Dipartimento di Fisica dell'Un iversità degli Studi di Perugia e INFN\, Via A. Pascoli\, 06123 Perugia\, Italy)\nMany experimental results around and above the energies where the solar \nmodulation affects cosmic ion fluxes were quantified\, debated an d \nconceptualized using leaky box models. These models basically exploit the \nnotion of equilibrium between creation and destruction processes of cosmic \nions in an undifferentiated arbitrary volume representing the Gal axy\, ignoring \nthe galactic magnetic field\, the size of the Galaxy\, th e position of the solar\, the \nspatial distribution of the sources\, the space variation of the interstellar matter \nand other pertinent observati ons. The progress in the measurements of these \nobservational parameters\ , which regulate cosmic ray properties\, makes \nobsolete the use of the l eaky box models. Specific examples substantiating the \ninadequacy of the leaky box models are analyzed like the conversion of the \nboron-to-carbon flux ratio into grammage and the residence times of cosmic \nions in the Galaxy. The unphysical and misleading nature of the leaky box \nmodels is ascertained and illustrated at very high energies.\n\nhttps://indico.nucle ares.unam.mx/event/4/session/91/contribution/705 LOCATION:Merida\, Mexico Kabah (Holiday Inn) URL:https://indico.nucleares.unam.mx/event/4/session/91/contribution/705 END:VEVENT BEGIN:VEVENT SUMMARY:Spatial Distribution of Galactic Cosmic Ray Sources DTSTART;VALUE=DATE-TIME:20070706T140600Z DTEND;VALUE=DATE-TIME:20070706T141800Z DTSTAMP;VALUE=DATE-TIME:20260613T220130Z UID:indico-contribution-91-0-31@cern.ch DESCRIPTION:Speakers: Dr. FARAHAT\, Ashraf (Alexandria University\, EGYPT) \nDifferent locations in the galaxy are unequally participating into the p roduction \nof elements and isotopes observed in the solar system. In this work\, we \npresent a model that includes spatial dimensions as a basic e lement. The \nbackward stochastic solution introduced in this paper will a llow us to determine \nthe abundance of each nucleus at certain energy and a single location in the \ngalaxy. A test particle is allowed to follow a stochastic path starting from the \nsolar system and runs backward in tim e till hitting the galaxy boundary. The \nabundance for each nucleus is re corded at certain energy and single location in \nthe stochastic path. Thi s method is very flexible in controlling the size of the \ntime step\, whi ch will result in more detailed structure of different locations in \nthe galaxy. The control of the size of the time step in the detailed stochasti c \npath is a very big advantage for this model\, since it can reveal a lo t of detailed \nstructure in the galaxy. The presented model is also capab le to find out galactic \nlocations containing sources of production of ce rtain nuclides.\n\nhttps://indico.nucleares.unam.mx/event/4/session/91/con tribution/31 LOCATION:Merida\, Mexico Kabah (Holiday Inn) URL:https://indico.nucleares.unam.mx/event/4/session/91/contribution/31 END:VEVENT BEGIN:VEVENT SUMMARY:Monte Carlo study of Cosmic-Ray Propagation in the Galaxy and Diff use Gamma-Ray Production DTSTART;VALUE=DATE-TIME:20070706T141800Z DTEND;VALUE=DATE-TIME:20070706T143000Z DTSTAMP;VALUE=DATE-TIME:20260613T220130Z UID:indico-contribution-91-0-1087@cern.ch DESCRIPTION:Speakers: Prof. POHL\, Martin (Dept. of Physics and Astronomy\ , Iowa State University)\nThis talk present preliminary results for the ti me-dependent cosmic-ray \npropagation in the Galaxy by a fully 3-dimension al Monte Carlo simulation. \nThe distribution of cosmic-rays (both protons and helium nuclei) in \nthe Galaxy is studied on various spatial scales f or both constant and variable \ncosmic-ray sources.\nThe continuous diffus e gamma-ray emission produced by cosmic-rays during the \npropagation is e valuated. The results will be compared with calculations made \nwith other propagation models.\n\nhttps://indico.nucleares.unam.mx/event/4/session/9 1/contribution/1087 LOCATION:Merida\, Mexico Kabah (Holiday Inn) URL:https://indico.nucleares.unam.mx/event/4/session/91/contribution/1087 END:VEVENT BEGIN:VEVENT SUMMARY:The CREAM-III Calorimeter DTSTART;VALUE=DATE-TIME:20070706T143000Z DTEND;VALUE=DATE-TIME:20070706T144200Z DTSTAMP;VALUE=DATE-TIME:20260613T220130Z UID:indico-contribution-91-0-720@cern.ch DESCRIPTION:Speakers: MALININ\, A. (Institute for Physical Science and Tec hnology\, University of Maryland)\nAfter successful recovery of the first CREAM (Cosmic Ray Energetics And Mass) \ninstrument during the 2004/5 Anta rctic campaign\, the calorimeter was \nrefurbished for the third launch\, planned for December 2007. In this CREAM-III \ncalorimeter\, the optics w ere replaced with multi-clad fiber ribbons to enhance \nthe light signal. New readout electronics boards reduce noise even further than \nthe previo us low-noise version. These improvements allow increased \nsensitivity to low energy showers. A new assembly structure has also been \nfabricated f or ease of recovery. This refurbished calorimeter was calibrated in a \nCE RN test beam in October 2006\, and it is now being integrated with the res t \nof the CREAM detector suite. The construction of the calorimeter and t ests of its \noptical and electronic components will be discussed.\n\nhttp s://indico.nucleares.unam.mx/event/4/session/91/contribution/720 LOCATION:Merida\, Mexico Kabah (Holiday Inn) URL:https://indico.nucleares.unam.mx/event/4/session/91/contribution/720 END:VEVENT END:VCALENDAR