Ion composition of cosmic radiation in HEA03-C2, and propagation in the presence of interstellar helium. GRIMTEL, a telescope for studying high energy gamma rays, experimental test in an accelerator and numerical simulation
Description
The origin, acceleration, and propagation of cosmic rays were investigated by studying charged cosmic rays and high energy gamma radiation. The isotopic composition of cosmic rays at 3 GeV/nucleus is established from HEA03-C2 data. An abnormal component which could be ejected from Wolf-Rayet stars is identified. Simultaneous analysis of the ratios B/C and Sc-Mn/Fe is used to study the trajectory of cosmic rays in the galaxy. Results reveal the difficulties of the Leaky Box model in predicting the Sc-Mn/Fe ratio, and support other models where the distribution of the trajectory is deficient in short values, as is the case if two confinement volumes for cosmic rays exist, the first possibly being dense regions around the sources. A gamma instrument (GRIMTEL) for the energy range 1 to 100 GeV, with excellent angular resolution allowing the localization of gamma sources to within a few arcmin is presented. It uses the Cerenkov imaging technique
Availability note (English)
MF available from INIS under the Report Number.Abstract (French)
L'origine, l'acceleration, et la propagation des rayons cosmiques sont analysees a travers des etudes qui portent sur le rayonnement cosmique charge et le rayonnement gamma de haute energie. La composition isotopique des rayons cosmiques a 3 GeV/nucleon est etablie a partir des donnees de HEA03-C2. Une composante anormale qui pourrait etre de la matiere ejectee par les etoiles Wolf-Rayet est identifiee. L'analyse simultanee des deux rapports B/C et Sc-Mn/Fe permet d'etudier la distribution de parcours des rayons cosmiques dans la galaxie. Les resultats mettent en evidence la difficulte du modele dit Leaky Box a predire le rapport Sc-Mn/Fe, et favorisent d'autres modeles ou la distribution de parcours des rayons est deficiente en courtes valeurs, comme c'est le cas s'il existe deux volumes de confinement pour les rayons cosmiques, le premier pouvant etre des regions denses autour des sources. Un instrument gamma (GRIMTEL) pour la gamme d'energie entre 1 et 100 GeV, avec une excellente resolution angulaire permettant la localisation des sources gamma a quelques minutes d'arc pres est presente. Il utilise la technique d'imagerie CerenkovFiles
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Additional details
Additional titles
- Original title (French)
- Composition isotopique du rayonnement cosmique a haute energie dans HEA03-C2, et propagation en presence d'helium interstellaire
- Original subtitle (French)
- GRIMTEL, un telescope pour l'etude des rayons gamma de haute energie, experience test en accelerateur et simulation numerique.
Publishing Information
- Imprint Pagination
- 204 p.
- Report number
- FRCEA-TH--67
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 20028084
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- ASTROPHYSICS; CHERENKOV COUNTERS; COSMIC RADIATION; COSMIC RAY DETECTION; COSMIC RAY FLUX; COSMIC RAY PROPAGATION; COSMIC RAY SPECTROMETERS; COSMOCHEMISTRY; GALAXIES; GAMMA ASTRONOMY; GEV RANGE 01-10; HELIUM; INTERSTELLAR SPACE; SATELLITES; TELESCOPES; WOLF-RAYET STARS
- Descriptors DEC
- ASTRONOMY; CHEMISTRY; DETECTION; ELEMENTS; ENERGY RANGE; GEV RANGE; IONIZING RADIATIONS; MAIN SEQUENCE STARS; MEASURING INSTRUMENTS; NONMETALS; RADIATION DETECTION; RADIATION DETECTORS; RADIATION FLUX; RADIATIONS; RARE GASES; SPACE; SPECTROMETERS; STARS