| 1. |
- Bongi, M, et al.
(author)
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PAMELA : A satellite experiment for antiparticles measurement in cosmic rays
- 2004
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In: IEEE Transactions on Nuclear Science. - 0018-9499 .- 1558-1578. ; 51:3, s. 854-859
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Journal article (peer-reviewed)abstract
- PAMELA is a satellite-borne experiment that will study the antiproton and positron fluxes in cosmic rays in a wide range of energy (from 80 MeV up to 190 GeV for antiprotons and from 50 MeV up to 270 GeV for positrons) and with high statistics, and that will measure the antihelium/helium ratio with a sensitivity of the order of 10(-8). The detector will fly on-board a polar orbiting Resurs DK1 satellite, which will be launched into space by a Soyuz rocket in 2004 from Baikonur cosmodrome in Kazakhstan, for a 3-year-long mission. Particle identification and energy measurements are performed in the PAMELA apparatus using the following subdetectors: a magnetic spectrometer made up of a permanent magnet equipped with double-sided microstrip silicon detectors, an electromagnetic imaging calorimeter composed of layers of tungsten absorber and silicon detectors planes, a transition radiation detector made of straw tubes interleaved with carbon fiber radiators, a plastic scintillator time-of-flight and trigger system, a set of anticounter plastic scintillator detectors, and a neutron detector. The features of the detectors and the main results obtained in beam test sessions are presented.
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| 2. |
- Bellotti, R, et al.
(author)
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Clustering analysis and supervised methods for antiparticle studies in the PAMELA experiment
- 2004
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In: Nuclear Instruments and Methods in Physics Research Section A. - : Elsevier BV. - 0168-9002 .- 1872-9576. ; 525:1-2, s. 412-416
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Journal article (peer-reviewed)abstract
- In this study a new approach to pattern recognition problems in astroparticle physics is presented. The context in which this work has been developed is the satellite borne experiment PAMELA, whose principal aim is antiparticle studies. In particular the classification problem of the PAMELA imaging calorimeter has been taken into account. This detector is designed for particle identification; due to its high granularity, both in the transversal and in the longitudinal direction, the calorimeter is suitable for reconstructing the spatial development of a shower. For each event the calorimeter is able to provide a 3D image that can be used to discriminate between hadrons and leptons. In this work the available information for each kind of image event class has been pre-processed representing each event by means of discriminating variables. A clustering analysis has been applied to a data set and the classification has been performed using supervised algorithms. Results from simulated data from the PAMELA prototype calorimeter will be shown.
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| 3. |
- Boezio, M., et al.
(author)
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Imaging dark matter with the Pamela experiment
- 2001
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In: Nuclear Instruments and Methods in Physics Research Section A. - 0168-9002 .- 1872-9576. ; 471:02-jan, s. 184-187
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Journal article (peer-reviewed)abstract
- The search for dark matter is a fundamental issue for astroparticle physics. A satellite-borne experiment ('Pamela') is under construction and will study cosmic rays whilst executing a polar orbit at an altitude of 690 km. The experiment comprises a transition radiation detector; a magnetic spectrometer, incorporating silicon tracking and surrounded by an anti-coincidence shield; an electromagnetic imaging calorimeter and a time-of-flight trigger system. This combination of detectors is particularly apt for the study of the antiproton component of cosmic rays from 100 MeV up to a few 100 GeV and will provide important new information for dark matter searches.
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| 4. |
- Boezio, M., et al.
(author)
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The space experiment PAMELA
- 2004
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In: Nuclear Physics B - Proceedings Supplements. - : Elsevier BV. ; , s. 39-46
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Conference paper (peer-reviewed)abstract
- We present in this paper a status report of the space experiment PAMELA. PAMELA is a satellite-borne experiment which primarily aims to measure the antiproton and positron spectra in the cosmic radiation over a large energy range (from 80 MeV up to 190 GeV for antiprotons and from 50 MeV up to 270 GeV for positrons) and to search for antinuclei with a sensitivity of the order of 10(-8) in the antihelium/ helium ratio. In addition, it will measure the light nucleax component of cosmic rays and investigate phenomena connected with Solar and Earth physics. The apparatus will be installed onboard the polar orbiting Resurs DK1 satellite, which will be launched into space by a Soyuz TM2 rocket in 2004 from Baikonur cosmodrome in Kazakhstan, for a 3 year long mission. PAMELA consists of: a time of flight system, a transition radiation detector, a magnetic spectrometer, an anticoincidence detector, an electromagnetic imaging calorimeter, a shower tail catcher scintillator and a neutron detector.
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| 5. |
- Bonvicini, V., et al.
(author)
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New concepts in silicon calorimetry for space experiments
- 2004
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In: Nuclear Instruments and Methods in Physics Research Section A. - : Elsevier BV. - 0168-9002 .- 1872-9576. ; 518:1-2, s. 186-187
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Journal article (peer-reviewed)abstract
- In the framework of the INFN R&D project CASIS, we have designed a new double-sided silicon strip detector with parallel strips, optimised for calorimetry. The idea is to read out p and n strips with two types of electronics, having different sensitivities and ranges, in order to increase the overall dynamic range by covering different signal regions. We present results from a test beam we performed at TSL (Uppsala, Sweden) with N, O and Ne ions with energies above 40 MeV/n. The design of a new front-end integrated circuit, with ultra-large dynamic range (more than 10,000 MIP) is under way and the first prototypes will be produced by the end of 2003.
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| 6. |
- Bonvicini, V., et al.
(author)
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The PAMELA experiment in space
- 2001
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In: Nuclear Instruments and Methods in Physics Research Section A. - 0168-9002 .- 1872-9576. ; 461:03-jan, s. 262-268
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Journal article (peer-reviewed)abstract
- We provide in this paper a status report of the space experiment PAMELA. PAMELA aims primarily to measure the flux of antiparticles, namely antiprotons and positrons, in cosmic rays with unprecedented statistics over a large energy range. Tn addition, it will measure the light nuclear components of cosmic rays, investigate phenomena connected to Solar and Earth physics and it will search for cosmic ray antinuclei with sensitivity better than 10(-7) in the He/He ratio. PAMELA consists of a magnet spectrometer, a transition radiation detector, an imaging calorimeter, a time of flight system and an anticoincidence detector. The apparatus will be installed on board of the Russian satellite of the Resurs type in a polar orbit at about 680 km of altitude. The launch is foreseen for late 2002/early 2003.
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| 7. |
- Pearce, Mark, et al.
(author)
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CLIMB : cosmic light isotopes and muons with balloons
- 2004
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In: Nuclear Instruments and Methods in Physics Research Section A. - : Elsevier BV. - 0168-9002 .- 1872-9576. ; 525:02-jan, s. 114-117
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Journal article (peer-reviewed)abstract
- A new balloon-borne experiment is proposed which will measure high-energy light isotopes at the top of the Earth's atmosphere and cosmic ray muons at fixed altitudes within the Earth's atmosphere.
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