HR: 17:50h
AN: SH54A-05    [Abstracts]
TI: Antiparticles In The Vicinity Of Earth
AU: * Voronov, S A
EM: SAVoronov@mephi.ru
AF: Moscow Physics Engineering Institute (State University), 31 Kashirskoe shosse, Moscow, 115409, Russian Federation
AB: The study of cosmic ray electrons and positrons outside the atmosphere began in 60's with instruments installed on board satellites. Some indirect measurements were implemented on high altitude balloons. Beginning the first magnetic spectrometer on board Russian Space Station SALUT-7 Mariya 1985 the first separate positron data were obtained. This investigation gave the first result for positron and electron spectra in energy range 20- 200 MeV under radiation belt and inside it. Then Mariya-2 on board MIR station confirms reentrant albedo nature of positron fluxes. The experimental results of these experiments are presented. The results of calculations based on cosmic ray interaction with upper atmosphere were consistent with these experiments. The measurements of charge composition in radiation belt showed the lack of positrons and acceleration nature of electron fluxes. The attempt was made to search for antiprotons in radiation belt. The upper limit was obtained on the level 510^-3. Next magnetic spectrometer in space was AMS-01 in 1998. 10 day flight measurements gave the possibility to receive results for antiparticles in energy range 0.2 - 3 GeV with very big statistics. Next steps in this study are PAMELA magnetic spectrometer measurements in orbit. It was launched 15.06.2006 and its goal is antiparticle spectra in near the Earth space in energy range 0.08 - 200 GeV.
DE: 2716 Energetic particles: precipitating
DE: 2720 Energetic particles: trapped
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2007 Joint Assembly