PAMELA is a satellite-borne experiment designed to study charged particles in the cosmic radiation with a particular interest in antiparticles. The experiment is collecting data since July 2006 on board of the Russian Resurs DK1 satellite, which travels along a semipolar elliptical orbit arount the Earth. The PAMELA apparatus includes a magnetic spectrometer, which is composed of 6 planes of silicon microstrip detectors dipped in an almost-uniform magnetic eld generated by a permanent magnet made of Nd-Fe-B alloy. The spectrometer has been designed to determine precisely the rigidity (up to 1 TeV) and the absolute charge (up to Z=6) of particles crossing the detector. In the rst part a short review of the magnetic spectrometer design is given and the main spectrometer operations in ight are described. The main topic of this article is the procedure to measure the rigidity, described in the second part. Particular focus is put on the position-nding algorithm. In fact, recent theoretical and experimental results have shown that in case of inclined tracks a signicant systematic shift can be present, if the proper algorithm is not applied. Finally, some preliminary results are presented.
In-flight performances of the PAMELA magnetic spectrometer / Adriani, O.; Bongi, M.; Bonechi, L.; Bottai, S.; Castellini, G.; Fedele, D.; Grandi, M.; Landi, G.; Papini, P.; Ricciarini, S.; Tasselli, P.; Taddei, E.; Vannuccini, E.. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - ELETTRONICO. - Vertex 2007:(2007), pp. 1-12.
In-flight performances of the PAMELA magnetic spectrometer
ADRIANI, OSCAR;BONGI, MASSIMO;
2007
Abstract
PAMELA is a satellite-borne experiment designed to study charged particles in the cosmic radiation with a particular interest in antiparticles. The experiment is collecting data since July 2006 on board of the Russian Resurs DK1 satellite, which travels along a semipolar elliptical orbit arount the Earth. The PAMELA apparatus includes a magnetic spectrometer, which is composed of 6 planes of silicon microstrip detectors dipped in an almost-uniform magnetic eld generated by a permanent magnet made of Nd-Fe-B alloy. The spectrometer has been designed to determine precisely the rigidity (up to 1 TeV) and the absolute charge (up to Z=6) of particles crossing the detector. In the rst part a short review of the magnetic spectrometer design is given and the main spectrometer operations in ight are described. The main topic of this article is the procedure to measure the rigidity, described in the second part. Particular focus is put on the position-nding algorithm. In fact, recent theoretical and experimental results have shown that in case of inclined tracks a signicant systematic shift can be present, if the proper algorithm is not applied. Finally, some preliminary results are presented.
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