[Show abstract][Hide abstract] ABSTRACT: The satellite-borne PAMELA experiment studies cosmic ray spectra over a wide range of energies. The instrument was placed in orbit in June 2006 and remains there to the present day. A position-sensitive calorimeter is one of the main parts of the PAMELA instrument. The calorimeter data are used to determine the energy of particles that interact within it, separate the electron component of the detected radiation from the nuclear component, and reconstruct the tracks of particles passing through the instrument. The special calorimeter and S4 scintillation shower detector triggers enables us to expand our statistics considerably. Using the calorimeter data in generating these triggers means we can study the anisotropy of cosmic rays with energies in excess of tens of GeV. This method of anisotropy detection is based on reconstructing the direction of a particle’s arrival from the axis of the secondary particle cascade in the calorimeter.
Bulletin of the Russian Academy of Sciences Physics 11/2013; 77(11):1305-1308. DOI:10.3103/S1062873813110154
[Show abstract][Hide abstract] ABSTRACT: The PAMELA experiment is being conducted aboard the Russian satellite Resurs-DK 1, which was launched into a near-Earth circumpolar orbit on June 15, 2006. The instrument, which includes a magnetic spectrometer and an electromagnetic calorimeter (16X 0), allows us to measure the fluxes of cosmic-ray electrons and positrons over a wide range of energies from ∼100 MeV to hundreds of GeV. This work presents the measurement data collected from July 2006 through January 2010 on the spectra of primary cosmic-ray electrons and positrons. At low energies, this spectrum is in good agreement with a diffusion model that includes reacceleration and damping. At high energies, the measured spectrum is harder than the one predicted.
Bulletin of the Russian Academy of Sciences Physics 11/2013; 77(11-11):1309-1311. DOI:10.3103/S1062873813110221
[Show abstract][Hide abstract] ABSTRACT: The PAMELA magnetic spectrometer was launched into a near-Earth orbit on board the Resurs-DK1 satellite in June 2006; in December 2006, it recorded the last strong solar high-energy particle event of the 23rd solar cycle. A deficit was thereafter observed in solar energetic particle events because of the lengthy solar activity minimum and the weak evolution of the next (24th) solar cycle. As a result, only a few solar events involving protons with energies of more than 100 MeV were recorded between 2010 and 1012. This work presents the preliminary results from measurements of charged particle fluxes in these events, recorded by the Pamela spectrometer.
Bulletin of the Russian Academy of Sciences Physics 05/2013; 77(5). DOI:10.3103/S1062873813050109
[Show abstract][Hide abstract] ABSTRACT: A method for antiproton selection against a background of electrons, based on a mathematical model of data classification using variations in interparticle interaction in a calorimeter, and a method for excluding events accompanied by scattering in the inner detectors of a tracking system (which result in errors in the measured trajectory’s curvature and charge sign) from analysis are discussed in this paper. Antiproton spectra and antiproton/proton flux ratio at energies of 0.06 to 350 GeV with statistics of events surpassing those in  are obtained. The results can be used to create models for the generation and distribution of particles in the Galaxy, and for searching and studying the nature of hypothetical dark matter particles.
Bulletin of the Russian Academy of Sciences Physics 05/2013; 77(5). DOI:10.3103/S1062873813050389
[Show abstract][Hide abstract] ABSTRACT: The method is describes and the results of measurements of the high-energy cosmic ray proton spectrum in the PAMELA experiment are presented. This experiment is performed onboard an artificial satellite and is directed to study cosmic ray particle spectra in a wide energy range. Scientific equipment was put into Earth orbit in June, 2006 and is in operation mode until now. The scientific equipment of the PAMELA device incorporates various detectors, including a magnetic spectrometer and a position-sensitive strip calorimeter. This study was performed based on the data of these devices. The energy range of the measured proton spectrum is from 50 GeV to 15 TeV.
Bulletin of the Lebedev Physics Institute 03/2011; 38(3). DOI:10.3103/S1068335611030031 · 0.25 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: The PAMELA experiment is being conducted on board the RESURS DK1 satellite, launched into a near-Earth, near-polar orbit with
an altitude of 350–610 km and an inclination of 70° on June 15, 2006. The apparatus comprises a magnetic spectrometer, an
electromagnetic calorimeter (16X
0), a time-of-flight system, a neutron detector, an anticoincidence system, and a shower tail scintillator. It allows measurements
of electron and positron fluxes in cosmic rays over a wide energy range of ∼100 MeV to several hundreds of GeVs. In this work,
we present data on the electron and positron energy spectra in primary cosmic rays, obtained between June 2006 and December
Bulletin of the Russian Academy of Sciences Physics 03/2011; 75(3):316-318. DOI:10.3103/S1062873811030300