Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics (PAMELA) is a satellite-borne experiment which will investigate the matter-antimatter (a)symmetry of the universe and other cosmological problems through precise cosmic-ray measurements. The primary objectives of the PAMELA mission include measurements of the energy spectra of cosmic-ray antiprotons and positrons over a large energy range (up to 190GeV for antiprotons, 270 GeV for positrons) and with unprecedented accuracy, the search for an antimatter component with a sensitivity of 10-7 in the Hē/He ratio, the measurement of the light nuclear components of cosmic rays up to 200 GeV/n and of the electron component up to at least 400 GeV. The apparatus is built around a permanent magnetic spectrometer equipped with a double-sided silicon microstrip tracking system and surrounded by a scintillator anticoincidence system. State-of-the-art detectors are used for particle identification: a silicon-tungsten imaging calorimeter, augmented by a scintillator shower tail catcher, and a transition radiation detector made up of carbon fibre radiators and proportional straw tubes. Fast scintillators are used for time-of-flight measurements and to provide the primary trigger. A neutron detector is finally provided to extend the range of particle measurements to energies as high as 1011-1013eV. PAMELA will be operated on-board of the Resurs-DK1 satellite, which will be put into its semi-polar orbit in 2004. Here we illustrate the main features of the apparatus and its current status.
The space mission PAMELA / Circella, M., Adriani, O., Ambriola, A., Bakaldin, A., Barbarino, G.C., Basili, A., Bazilevskaja, G., Bellotti, R., Bencardino, R., Boezio, M., Bogomolov, E.A., Bonechi, L., Bongi, M., Bongiorno, L., Bonvicini, V., Boscherini, M., Cafagna, F.S., Campana, D., Carlson, P., Casolino, M., et al.. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - ELETTRONICO. - 518:(2004), pp. 153-157. [10.1016/j.nima.2003.10.048]
The space mission PAMELA
Circella, M.;ADRIANI, OSCAR;BONGI, MASSIMO;STRAULINO, SAMUELE;
2004
Abstract
Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics (PAMELA) is a satellite-borne experiment which will investigate the matter-antimatter (a)symmetry of the universe and other cosmological problems through precise cosmic-ray measurements. The primary objectives of the PAMELA mission include measurements of the energy spectra of cosmic-ray antiprotons and positrons over a large energy range (up to 190GeV for antiprotons, 270 GeV for positrons) and with unprecedented accuracy, the search for an antimatter component with a sensitivity of 10-7 in the Hē/He ratio, the measurement of the light nuclear components of cosmic rays up to 200 GeV/n and of the electron component up to at least 400 GeV. The apparatus is built around a permanent magnetic spectrometer equipped with a double-sided silicon microstrip tracking system and surrounded by a scintillator anticoincidence system. State-of-the-art detectors are used for particle identification: a silicon-tungsten imaging calorimeter, augmented by a scintillator shower tail catcher, and a transition radiation detector made up of carbon fibre radiators and proportional straw tubes. Fast scintillators are used for time-of-flight measurements and to provide the primary trigger. A neutron detector is finally provided to extend the range of particle measurements to energies as high as 1011-1013eV. PAMELA will be operated on-board of the Resurs-DK1 satellite, which will be put into its semi-polar orbit in 2004. Here we illustrate the main features of the apparatus and its current status.
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