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1. Design and commissioning of a high-level control system for a medical isochronous cyclotron

Author

Hofverberg, Petter, Bergerot, Jean-Marc, Bruneau, Jean-Michel, and Trimaud, Richard

Subjects
Physics - Accelerator Physics, Physics - Instrumentation and Detectors
Abstract

MEDICYC (MEDical CYClotron) is an isochronous cyclotron dedicated to radiotherapy which was built and commissioned in Nice, France, in 1990 by a local team aided by experts from CERN. The cyclotron accelerates negative H to a maximum energy of 65 MeV and uses stripping to extract a proton beam. Its primary purpose is treating ocular melanoma by protontherapy but a significant research activity is also present on beam-lines dedicated for this purpose. An extensive refurbishment program of the cyclotron has been started to cope with the end-of-life and/or the obsolescence of several sub-systems. In this context, a new high-level cyclotron control system has been developed and commissioned in 2021-2024. The primary responsibility of the system is the high-level coordination of the source, the RF system, the beam-line and cyclotron magnets, to produce and deliver a beam with a given set of characteristics. A secondary responsibility is the collection, visualization and analysis of sub-system and beam data for monitoring and pre-emptive fault detection. In this contribution, the control system software architecture is presented and the infrastructure on which the systems are deployed is laid out., Comment: 3 pages, 2 figures

Published
2024
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2. Validation of a new 60 MeV proton beam-line for radiation hardness testing

Author

Hofverberg, Petter, Bezerra, Francoise, Ruffenach, Marine, Hérault, Joêl, Mekki, Julien, Dufour, Arnaud, and Trimaud, Richard

Subjects
Physics - Accelerator Physics, Physics - Instrumentation and Detectors
Abstract

A 60 MeV proton beam-line has been developed in Nice, France, in collaboration with the Centre National d'Etudes Spatiales (CNES). Experimental results are presented here to validate the beam-line for radiation hardness testing., Comment: RADECS conference 2022

Published
2023

4. A generalized model for monitor units determination in ocular proton therapy using machine learning:A proof-of-concept study

Author

Fleury, Emmanuelle, Herault, Joël, Spruijt, Kees, Kouwenberg, Jasper, Angellier, Gaëlle, Hofverberg, Petter, Horwacik, Tomasz, Kajdrowicz, Tomasz, Pignol, Jean Philippe, Hoogeman, Mischa, Trnková, Petra, Fleury, Emmanuelle, Herault, Joël, Spruijt, Kees, Kouwenberg, Jasper, Angellier, Gaëlle, Hofverberg, Petter, Horwacik, Tomasz, Kajdrowicz, Tomasz, Pignol, Jean Philippe, Hoogeman, Mischa, and Trnková, Petra

Abstract

Objective. Determining and verifying the number of monitor units is crucial to achieving the desired dose distribution in radiotherapy and maintaining treatment efficacy. However, current commercial treatment planning system(s) dedicated to ocular passive eyelines in proton therapy do not provide the number of monitor units for patient-specific plan delivery. Performing specific pre-treatment field measurements, which is time and resource consuming, is usually gold-standard practice. This proof-of-concept study reports on the development of a multi-institutional-based generalized model for monitor units determination in proton therapy for eye melanoma treatments. Approach. To cope with the small number of patients being treated in proton centers, three European institutes participated in this study. Measurements data were collected to address output factor differences across the institutes, especially as function of field size, spread-out Bragg peak modulation width, residual range, and air gap. A generic model for monitor units prediction using a large number of 3748 patients and broad diversity in tumor patterns, was evaluated using six popular machine learning algorithms: (i) decision tree; (ii) random forest, (iii) extra trees, (iv) K-nearest neighbors, (v) gradient boosting, and (vi) the support vector regression. Features used as inputs into each machine learning pipeline were: Spread-out Bragg peak width, range, air gap, fraction and calibration doses. Performance measure was scored using the mean absolute error, which was the difference between predicted and real monitor units, as collected from institutional gold-standard methods. Main results. Predictions across algorithms were accurate within 3% uncertainty for up to 85.2% of the plans and within 10% uncertainty for up to 98.6% of the plans with the extra trees algorithm. Significance. A proof-of-concept of using machine learning-based generic monitor units determination in ocular proton therapy has be

Published
2024

6. Development of integration mode proton imaging with a single CMOS detector for a small animal irradiation platform

Author

Schnürle, Katrin, primary, Bortfeldt, Jonathan, additional, Englbrecht, Franz Siegfried, additional, Gianoli, Chiara, additional, Hartmann, Jens, additional, Hofverberg, Petter, additional, Meyer, Sebastian, additional, Niepel, Katharina, additional, Yohannes, Indra, additional, Vidal, Marie, additional, Landry, Guillaume, additional, Hérault, Joël, additional, Schreiber, Jörg, additional, Parodi, Katia, additional, and Würl, Matthias, additional

Published
2023
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7. CMOS integration mode proton imaging

Author

Schnürle, Katrin, Bortfeldt, Jonathan, Englbrecht, Franz Siegfried, Gianoli, Chiara, Hofverberg, Petter, Meyer, Sebastian, Poulsen, Per, Sitarz, Mateusz, Sondergaard, Christian, Vidal, Marie, Herault, Joel, Parodi, Katia, and Würl, Matthias

Published
2022
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9. Design and expected performance of a new 60 MeV proton beam-line dedicated for R&D

Author

Hofverberg, Petter, primary, Antunes, Morgane, additional, Armando, Christian, additional, Bergerot, Jean-Marc, additional, Bourrel, Eric, additional, Dicarlo, Jean-Francois, additional, Donadey, Gerard, additional, Dumas, Serge, additional, Grini, Jean-Claude, additional, Giusto, Alex, additional, Herault, Joel, additional, Payan, Yves, additional, Salicis, Claude, additional, and Trimaud, Richard, additional

Published
2021
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10. Cosmic ray measurements with Pamela experiment

Author

Casolino, M., De Simone, N., De Pascale, M.P., Di Felice, V., Marcelli, L., Minori, M., Picozza, P., Sparvoli, R., Castellini, G., Adriani, O., Bonechi, L., Bongi, M., Bottai, S., Fedele, D., Papini, P., Ricciarini, S., Spillantini, P., Taddei, E., Vannuccini, E., Barbarino, G., Campana, D., Carbone, R., De Rosa, G., Osteria, G., Boezio, M., Bonvicini, V., Mocchiutti, E., Vacchi, A., Zampa, G., Zampa, N., Bruno, A., Cafagna, F.S., Ricci, Marco, Hofverberg, Petter, Pearce, Mark, Carlson, Per, Bogomolov, Edward, Krutkov, S.Yu., Nikonov, N.N., Vasilyev, G.I., Menn, Wolfgang, Simon, Manfred, Galper, Arkady M., Grishantseva, Lubov, Koldashov, Sergey, Leonov, Alexey, Mikhailov, Vladimir V., Voronov, Sergey A., Yurkin, Yuri T., Zverev, Valeri G., Bazilevskaya, Galina A., Kvashnin, Alexander N., Maksumov, Osman, and Stozhkov, Yuri

Published
2009
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11. Characterization of the HollandPTC proton therapy beamline dedicated to uveal melanoma treatment and an interinstitutional comparison

Author

Fleury, Emmanuelle, primary, Trnková, Petra, additional, Spruijt, Kees, additional, Herault, Joël, additional, Lebbink, Franciska, additional, Heufelder, Jens, additional, Hrbacek, Jan, additional, Horwacik, Tomasz, additional, Kajdrowicz, Tomasz, additional, Denker, Andrea, additional, Gerard, Anaïs, additional, Hofverberg, Petter, additional, Mamalui, Maria, additional, Slopsema, Roelf, additional, Pignol, Jean‐Philippe, additional, and Hoogeman, Mischa, additional

Published
2021
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14. The data acquisition system of the Stockholm Educational Air Shower Array

Author

Hofverberg, Petter, Johansson, Henrik, Pearce, Mark, Rydstrom, Stefan, and Wikstrom, Christian

Subjects
Cosmic rays -- Research, Global Positioning System -- Research, Global Positioning System, Business, Electronics, Electronics and electrical industries
Abstract

The Stockholm Educational Air Shower Array (SEASA) project is deploying an array of plastic scintillator detector stations on school roofs in the Stockholm area. Signals from GPS satellites are used to time synchronise signals from the widely separated detector stations, allowing cosmic ray air showers to be identified and studied. A low-cost and highly scalable data acquisition system has been produced using embedded Linux processors which communicate station data to a central server running a MySQL database. Air shower data can be visualised in real-time using a Java-applet client. It is also possible to query the database and manage detector stations from the client. In this paper, the design and performance of the system are described. Index Terms--Air showers, cosmic rays, high schools.

Published
2005

18. A New Measurement of Low Energy Antiprotons In the Cosmic Radiation

Author

Hofverberg, Petter

Subjects
Subatomär fysik, Astrophysics::High Energy Astrophysical Phenomena, Physics::Space Physics, Subatomic Physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment, cosmic radiation, antiprotons, solar modulation
Abstract

New measurements of the antiproton flux and the antiproton-to-proton flux ratio at the top of the atmosphere between 80 MeV and 2.0 GeV are presented. The measurement was conducted from July 2006 to March 2008 with the PAMELA satellite experiment. This is a period of minimum solar activity and negative solar polarity and the PAMELA measurement is the first observation of antiprotons during this particular solar state. The PAMELA instrument comprises a permanent magnet spectrometer, a scintillator based time-of-flight system, an electromagnetic calorimeter and an anticoincidence shield. These detectors can identify antiprotons from a background of cosmic-ray electrons and locally produced pions. The PAMELA instrument is mounted on the Resurs DK1 satellite that was launched from the Baikonur Cosmodrome on June the 15th into a semi-polar orbit with an inclination of 70o. During approximately 500 days of data collection 170 antiprotons were identified. The derived antiproton spectrum shows a steep increase up to 2 GeV as expected for pure secondary production of galactic antiprotons. The antiproton flux is over-estimated by most current models of secondary production compared to PAMELA results. There are no indications of the excess of antiprotons at low energy predicted by theories of primordial black hole evaporation. The antiproton-to-proton flux ratio is in agreement with drift models of solar modulation, which are also favoured by recent PAMELA measurements of the positron fraction. QC 20100811

Published
2008

19. Imaging the high energy cosmic ray sky

Author

Hofverberg, Petter

Subjects
Subatomär fysik, Astrophysics::High Energy Astrophysical Phenomena, Subatomic Physics
Abstract

The Stockholm Educational Air Shower Array (SEASA) project is deploying an array of plastic scintillator detector stations on school roofs in the Stockholm area. Signals from GPS satellites are used to time synchronise signals from the widely separated detector stations, allowing cosmic ray air showers to be identified and studied. A low-cost and highly scalable data acquisition system has been produced using embedded Linux processors which communicate station data to a central server. Air shower data can be visualised in real-time using a Java-applet client. The design and performance of the first three detector stations located at the AlbaNova University Centre are presented. The detectors have been running since the beginning of October 2005 and the data from this period is analysed to assess the stability and performance of the detector array. A total of 503 showers with a primary particle energy above 1016 eV, hitting all three detector stations simultaneously, have been detected during this period. The read out and data-base system used to collect the data are described together with a quicklook tool for ensuring the integrity of the data. A preliminary study of the acceptance of the detector array as a function of weather conditions, to be used in future studies of cosmic ray anisotropy, is presented. The acceptance of the single detector stations is found to decrease with increasing atmospheric pressure and to stay constant over a large range of temperatures. The acceptance of the entire array of detector stations is found to have a stronger continuous dependence on temperature than single stations. The dependence of the array acceptance on pressure is inconclusive. The ability of the array to reconstruct the primary cosmic ray direction is assessed with simulations. A critical feature for the reconstruction is the time resolution of the system. The performance of the GPS system is therefore tested, and the time resolution is found to be better than 15 ns for all tested GPS units. The angular resolution of the array for this time resolution is found to be (7.0\pm0.3)^{\circ}. As the time resolution is expected to decrease for a larger array of detectors, the dependency of the time resolution on the angular resolution is derived. The measured distribution of the primary cosmic ray arrival direction is derived and compared to the expected distribution to check the performance of the system. The agreement between the distributions is good and the GPS timing system can therefore be concluded to work well. The simulations also show that the energy threshold of the array is slightly above 1016 eV. A preliminary study of the cosmic ray anisotropy is presented. The hypothesis of an isotropic flux of cosmic rays was tested using a two point correlation function. The probability that the observed flux is a random sampling from an isotropic flux was checked with a Kolmogorov test and it was found to be 82%. The hypothesis of an isotropic flux is therefore supported. QC 20101116

Published
2006

21. PAMELA and electrons

Author

Mocchiutti, E., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., Consiglio, L., De Pascale, M. P., De Santis, C., Di Felice, V., Galper, A. M., Grishantseva, L., Gillard, W., Hofverberg, Petter, Jerse, G., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Maksumov, O., Malakhov, V., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mori, N., Nikonov, N., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Rossetto, Laura, Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Wu, Juan, Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Mocchiutti, E., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., Consiglio, L., De Pascale, M. P., De Santis, C., Di Felice, V., Galper, A. M., Grishantseva, L., Gillard, W., Hofverberg, Petter, Jerse, G., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Maksumov, O., Malakhov, V., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mori, N., Nikonov, N., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Rossetto, Laura, Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Wu, Juan, Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

The 15th of June 2006, the PAMELA satellite-borne experiment was launched from the Baikonur cosmodrome and it has been collecting data since July 2006. The apparatus comprises a time-of-flight system, a silicon-microstrip magnetic spectrometer, a silicon-tungsten electromagnetic calorimeter, an anticoincidence system, a shower tail counter scintillator and a neutron detector. The combination of these devices allows precision studies of the charged cosmic radiation to be conducted over a wide energy range (100 MeV-100's GeV) with high statistics. The measurement of the positron to electron fraction and of the electron energy spectrum in order to search for exotic sources, such as dark matter particle annihilations, are within the PAMELA primary scientific goal., QC 20110325

Published
2011
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22. Measuring fluxes of the protons and helium nuclei of high-energy cosmic rays

Author

Karelin, A. V., Carlson, Per, Hofverberg, Petter, Zampa, G., Zverev, V. G., et al., Karelin, A. V., Carlson, Per, Hofverberg, Petter, Zampa, G., Zverev, V. G., and et al.

Abstract

Techniques for measuring helium nuclei and proton energy spectra in circumterrestrial space were developed on the basis of simulated data and data from the position-sensitive silicon-tungsten calorimeter in the PAMELA satellite experiment. The thickness of the calorimeter is 0.6 nuclear interaction lengths. In this work, the experimental results for the measured energy spectra of the protons and helium nuclei of cosmic rays with energies above 50 GeV are presented., QC 20140916

Published
2011
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23. Latitudinal and radial gradients of galactic cosmic ray protons in the inner heliosphere - PAMELA and Ulysses observations

Author

De Simone, N., Di Felice, V., Gieseler, J., Boezio, M., Casolino, M., Picozza, P., Heber, B., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Castellini, G., Consiglio, L., De Pascale, M. P., De Santis, C., Galper, A. M., Gillard, William, Grishantseva, L., Hofverberg, Petter, Jerse, G., Karelin, A. V., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Martucci, M., Mayorov, A. G., Menn, W., Mikhailov, V. V., Mocchiutti, E., Monaco, A., Mori, N., Nikonov, N., Osteria, G., Palma, F., Papini, P., Pearce, Mark, Pizzolotto, C., Ricci, M., Ricciarini, S. B., Rossetto, L., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Wu, J., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., De Simone, N., Di Felice, V., Gieseler, J., Boezio, M., Casolino, M., Picozza, P., Heber, B., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Castellini, G., Consiglio, L., De Pascale, M. P., De Santis, C., Galper, A. M., Gillard, William, Grishantseva, L., Hofverberg, Petter, Jerse, G., Karelin, A. V., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Martucci, M., Mayorov, A. G., Menn, W., Mikhailov, V. V., Mocchiutti, E., Monaco, A., Mori, N., Nikonov, N., Osteria, G., Palma, F., Papini, P., Pearce, Mark, Pizzolotto, C., Ricci, M., Ricciarini, S. B., Rossetto, L., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Wu, J., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

Ulysses, launched on 6 October 1990, was placed in an elliptical, high inclined (80.2°) orbit around the Sun, and was switched off in June 2009. It has been the only spacecraft exploring high-latitude regions of the inner heliosphere. The Kiel Electron Telescope (KET) aboard Ulysses measures electrons from 3 MeV to a few GeV and protons and helium in the energy range from 6 MeV/nucleon to above 2 GeV/nucleon. The PAMELA (Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics) space borne experiment was launched on 15 June 2006 and is continuously collecting data since then. The apparatus measures electrons, positrons, protons, anti-protons and heavier nuclei from about 100 MeV to several hundreds of GeV. Thus the combination of Ulysses and PAMELA measurements is ideally suited to determine the spatial gradients during the extended minimum of solar cycle 23. For protons in the rigidity interval 1.6-1.8 GV we find a radial gradient of 2.7%/AU and a latitudinal gradient of -0.024%/degree. Although the latitudinal gradient is as expected negative, its value is much smaller than predicted by current particle propagation models. This result is of relevance for the study of propagation parameters in the inner heliosphere., QC 20211127

Published
2011
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24. PAMELA Results on the Cosmic-Ray Antiproton Flux from 60 MeV to 180 GeV in Kinetic Energy

Author

Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., Consiglio, L., De Pascale, M. P., De Santis, C., De Simone, N., Di Felice, V., Galper, A. M., Gillard, William, Grishantseva, L., Hofverberg, Petter, Jerse, G., Karelin, A. V., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Mayorov, A. G., Menn, W., Mikhailov, V. V., Mocchiutti, E., Monaco, A., Mori, N., Nikonov, N., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Pizzolotto, C., Ricci, M., Ricciarini, S. B., Rossetto, Laura, Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Wu, Juan, Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., Consiglio, L., De Pascale, M. P., De Santis, C., De Simone, N., Di Felice, V., Galper, A. M., Gillard, William, Grishantseva, L., Hofverberg, Petter, Jerse, G., Karelin, A. V., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Mayorov, A. G., Menn, W., Mikhailov, V. V., Mocchiutti, E., Monaco, A., Mori, N., Nikonov, N., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Pizzolotto, C., Ricci, M., Ricciarini, S. B., Rossetto, Laura, Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Wu, Juan, Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

The satellite-borne experiment PAMELA has been used to make a new measurement of the cosmic-ray antiproton flux and the antiproton-to-proton flux ratio which extends previously published measurements down to 60 MeV and up to 180 GeV in kinetic energy. During 850 days of data acquisition approximately 1500 antiprotons were observed. The measurements are consistent with purely secondary production of antiprotons in the Galaxy. More precise secondary production models are required for a complete interpretation of the results., QC 20101203

Published
2010
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25. A statistical procedure for the identification of positrons in the PAMELA experiment

Author

Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., Consiglio, L., De Pascale, M. P., De Santis, C., De Simone, N., Di Felice, V., Galper, A. M., Gillard, W., Grishantseva, L., Hofverberg, Petter, Jerse, G., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Monaco, A., Mori, N., Nikonov, N., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Rossetto, L., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Wu, Juan, Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Marinucci, D., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., Consiglio, L., De Pascale, M. P., De Santis, C., De Simone, N., Di Felice, V., Galper, A. M., Gillard, W., Grishantseva, L., Hofverberg, Petter, Jerse, G., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Monaco, A., Mori, N., Nikonov, N., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Rossetto, L., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Wu, Juan, Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., and Marinucci, D.

Abstract

The PAMELA satellite experiment has measured the cosmic-ray positron fraction between 1.5 GeV and 100 GeV. The need to reliably discriminate between the positron signal and proton background has required the development of an ad hoc analysis procedure. In this paper, a method for positron identification is described and its stability and capability to yield a correct background estimate is shown. The analysis includes new experimental data, the application of three different fitting techniques for the background sample and an estimate of systematic uncertainties due to possible inaccuracies in the background selection. The new experimental results confirm both solar modulation effects on cosmic-rays with low rigidities and an anomalous positron abundance above 10 GeV. (c) 2010 Elsevier B.V. All rights reserved., QC 20111108

Published
2010
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26. The PAMELA Space Mission for Antimatter and Dark Matter Searches in Cosmic Rays

Author

Adriani, O., Barbarino, G. C., Bazilevskaja, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., Consiglio, L., de Pascale, M. P., de Santis, C., de Simone, N., di Felice, V., Galper, A. M., Gillard, William, Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Mori, N., Nikonov, N. N., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Adriani, O., Barbarino, G. C., Bazilevskaja, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., Consiglio, L., de Pascale, M. P., de Santis, C., de Simone, N., di Felice, V., Galper, A. M., Gillard, William, Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Mori, N., Nikonov, N. N., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

On the 15(th) of June 2006, the PAMELA satellite-borne experiment was launched from the Baikonur cosmodrome and it has been collecting data since July 2006. The instrument allows precision studies of the charged cosmic radiation to be conducted over a wide energy range (100 MeV - 100's GeV) with high statistics. The primary scientific goal is the measurement of the antiproton and positron energy spectrum in order to search for exotic sources, such as dark matter particle annihilations. PAMELA is also searching for primordial antinuclei (anti-helium), and testing cosmic-ray propagation models through precise measurements of the antiparticle energy spectrum and precision studies of light nuclei and their isotopes. Moreover, PAMELA is investigating phenomena connected with solar and earth physics. Results of the antiproton and positron data will be presented., QC 20120210

Published
2010
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27. Cosmic rays studies with the PAMELA space experiment

Author

Sparvoli, R., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., De Santis, C., De Simone, N., Di Felice, V., Galper, A. M., Grishantseva, L., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Sparvoli, R., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., De Santis, C., De Simone, N., Di Felice, V., Galper, A. M., Grishantseva, L., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

The instrument PAMELA, in orbit since June 15th, 2006 on board the Russian satellite Resurs DK1, is delivering to ground 16 Gigabytes of data per day. The apparatus is designed to study charged particles in the cosmic radiation, with a particular focus on antiparticles as a possible signature of dark matter annihilation in the galactic halo; the combination of a magnetic spectrometer and different detectors-indeed-allows antiparticles to be reliably identified from a large background of other charged particles. New results on the antiproton-to-proton and positron-to-all-electron ratios over a wide energy range (1-100GeV) have been recently released by the PAMELA Collaboration, and will be summarized in this paper. While the antiproton-to-proton ratio does not show particular differences from an antiparticle standard secondary production, in the positron-to-all-electron ratio an enhancement is clearly seen at energies above 10GeV. Possible interpretations of this effect will be briefly discussed., Not duplicate with DiVA 751861.QC 20211117

Published
2010

28. New Measurement of the Antiproton-to-Proton Flux Ratio up to 100 GeV in the Cosmic Radiation

Author

Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Pearce, Mark, Carlson, Per, Hofverberg, Petter, Orsi, Silvio, et al, Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Pearce, Mark, Carlson, Per, Hofverberg, Petter, Orsi, Silvio, and et al

Abstract

A new measurement of the cosmic-ray antiproton-to-proton flux ratio between 1 and 100 GeV is presented. The results were obtained with the PAMELA experiment, which was launched into low-Earth orbit on-board the Resurs-DK1 satellite on June 15th 2006. During 500 days of data collection a total of about 1000 antiprotons have been identified, including 100 above an energy of 20 GeV. The high-energy results are a tenfold improvement in statistics with respect to all previously published data. The data follow the trend expected from secondary production calculations and significantly constrain contributions from exotic sources, e. g., dark matter particle annihilations., QC 20100525

Published
2009
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29. An anomalous positron abundance in cosmic rays with energies 1.5-100 GeV

Author

Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., De Rosa, G., De Simone, N., Di Felice, V., Galper, A. M., Grishantseva, L., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Orsi, Silvio, Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., De Rosa, G., De Simone, N., Di Felice, V., Galper, A. M., Grishantseva, L., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Orsi, Silvio, Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

Antiparticles account for a small fraction of cosmic rays and are known to be produced in interactions between cosmic-ray nuclei and atoms in the interstellar medium(1), which is referred to as a 'secondary source'. Positrons might also originate in objects such as pulsars(2) and microquasars(3) or through dark matter annihilation(4), which would be 'primary sources'. Previous statistically limited measurements(5-7) of the ratio of positron and electron fluxes have been interpreted as evidence for a primary source for the positrons, as has an increase in the total electron+positron flux at energies between 300 and 600 GeV (ref. 8). Here we report a measurement of the positron fraction in the energy range 1.5-100 GeV. We find that the positron fraction increases sharply overmuch of that range, in a way that appears to be completely inconsistent with secondary sources. We therefore conclude that a primary source, be it an astrophysical object or dark matter annihilation, is necessary., QC 20110408

Published
2009
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30. Cosmic rays studies with the PAMELA space experiment

Author

Sparvoli, R., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., De Santis, C., De Simone, N., Di Felice, V., Galper, A. M., Grishantseva, L., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Sparvoli, R., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., De Santis, C., De Simone, N., Di Felice, V., Galper, A. M., Grishantseva, L., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

The instrument PAMELA, in orbit since June 15th, 2006 on board the Russian satellite Resurs DK1, is delivering to ground 16 Gigabytes of data per day. The apparatus is designed to study charged particles in the cosmic radiation, with a particular focus on antiparticles as a possible signature of dark matter annihilation in the galactic halo; the combination of a magnetic spectrometer and different detectors-indeed- allows antiparticles to be reliably identified from a large background of other charged particles. New results on the antiproton-to-proton and positron-to-all-electron ratios over a wide energy range (1-100GeV) have been recently released by the PAMELA Collaboration, and will be summarized in this paper. While the antiproton-to-proton ratio does not show particular differences from an antiparticle standard secondary production, in the positron-to-all-electron ratio an enhancement is clearly seen at energies above 10 GeV. Possible interpretations of this effect will be briefly discussed., QC 20141002

Published
2009
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31. PAMELA and indirect dark matter searches

Author

Boezio, M., Pearce, Mark, Picozza, P., Sparvoli, R., Spillantini, P., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., Consiglio, L., De Pascale, M. P., De Santis, C., De Simone, N., Di Felice, V., Galper, A. M., Grishantseva, L., Gillard, William, Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Mori, N., Nikonov, N., Osteria, G., Papini, P., Ricci, M., Ricciarini, S. B., Simon, M., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Boezio, M., Pearce, Mark, Picozza, P., Sparvoli, R., Spillantini, P., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., Consiglio, L., De Pascale, M. P., De Santis, C., De Simone, N., Di Felice, V., Galper, A. M., Grishantseva, L., Gillard, William, Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Mori, N., Nikonov, N., Osteria, G., Papini, P., Ricci, M., Ricciarini, S. B., Simon, M., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

We present a review of the experimental results obtained by PAMELA in measuring the (p, (p) over bar ) and e(+/-) abundance in cosmic rays. In this context, we discuss the interpretation of the observed anomalous positron excess in terms of the annihilation of dark matter particles as well as in terms of standard astrophysical sources. Moreover we show the constraints on dark matter models from (p) over bar data., QC 20110407

Published
2009
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32. Two years of flight of the Pamela experiment : Results and perspectives

Author

Casolino, M., De Simone, N., Bongue, D., De Pascale, M. P., Felice, V. D., Marcelli, L., Minori, M., Picozza, P., Sparvoli, R., Castellini, G., Adriani, O., Bonechi, L., Bongi, M., Bottai, S., Papini, P., Ricciarini, S., Spillantini, P., Taddei, E., Vannuccini, E., Barbarino, G., Campana, D., Carbone, R., De Rosa, G., Osteria, G., Boezio, M., Bonvicini, V., Mocchiutti, E., Vacchi, A., Zampa, G., Zampa, N., Bruno, A., Cafagna, F. S., Ricci, M., Hofverberg, Petter, Pearce, Mark, Carlson, Per, Bogomolov, E., Krutkov, S.Yu., Nikonov, N. N., Menn, W., Simon, M., Galper, A. M., Grishantseva, L., Koldashov, S., Leonov, A., Mikhailov, V. V., Voronov, S. A., Yurkin, Y. T., Zverev, V. G., Bazilevskaya, G. A., Kvashnin, A. N., Maksumov, O., Stozhkov, Y., Casolino, M., De Simone, N., Bongue, D., De Pascale, M. P., Felice, V. D., Marcelli, L., Minori, M., Picozza, P., Sparvoli, R., Castellini, G., Adriani, O., Bonechi, L., Bongi, M., Bottai, S., Papini, P., Ricciarini, S., Spillantini, P., Taddei, E., Vannuccini, E., Barbarino, G., Campana, D., Carbone, R., De Rosa, G., Osteria, G., Boezio, M., Bonvicini, V., Mocchiutti, E., Vacchi, A., Zampa, G., Zampa, N., Bruno, A., Cafagna, F. S., Ricci, M., Hofverberg, Petter, Pearce, Mark, Carlson, Per, Bogomolov, E., Krutkov, S.Yu., Nikonov, N. N., Menn, W., Simon, M., Galper, A. M., Grishantseva, L., Koldashov, S., Leonov, A., Mikhailov, V. V., Voronov, S. A., Yurkin, Y. T., Zverev, V. G., Bazilevskaya, G. A., Kvashnin, A. N., Maksumov, O., and Stozhkov, Y.

Abstract

PAMELA is a satellite borne experiment designed to study with great accuracy cosmic rays of galactic, solar, and trapped nature in a wide energy range (protons: 80 MeV-700 GeV, electrons 50 MeV-400 GeV). Main objective is the study of the antimatter component: antiprotons (80 MeV-190 GeV), positrons (50 MeV-270 GeV) and search for antinuclei with a precision of the order of 10~8). The experiment, housed on board the Russian Resurs-DKl satellite, was launched on June, 15th 2006 in a 350 x 600 km orbit with an inclination of 70 degrees. In this work we describe the scientific objectives and the performance of PAMELA in its first two years of operation. Data on protons of trapped, secondary and galactic nature - as well as measurements of the December 13th 2006 Solar Particle Event - are also provided., QC 20141007

Published
2009
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33. Measurements of quasi-trapped electron and positron fluxes with PAMELA

Author

Adriani, O., Barbarino, G., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S. V., Bottai, S., Bruno, A., Cafagna, F. S., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., Consiglio, L., De Pascale, M. P., De Santis, C., De Simone, N., Di Felice, V., Galper, A. M., Gillard, William, Grishantseva, L. A., Jerse, G., Hofverberg, Petter, Karelin, A. V., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A. A., Malakhov, V. V., Malvezzi, V., Marcelli, L., Mayorov, A. G., Menn, W., Mikhailov, V. V., Mocchiutti, E., Monaco, A., Mori, N., Nikonov, N. N., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Pizzolotto, C., Ricci, M., Ricciarini, S. B., Rossetto, Laura, Ritabrata, S., Runtso, M. F., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G. I., Voronov, S. A., Wu, Juan, Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Adriani, O., Barbarino, G., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S. V., Bottai, S., Bruno, A., Cafagna, F. S., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., Consiglio, L., De Pascale, M. P., De Santis, C., De Simone, N., Di Felice, V., Galper, A. M., Gillard, William, Grishantseva, L. A., Jerse, G., Hofverberg, Petter, Karelin, A. V., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A. A., Malakhov, V. V., Malvezzi, V., Marcelli, L., Mayorov, A. G., Menn, W., Mikhailov, V. V., Mocchiutti, E., Monaco, A., Mori, N., Nikonov, N. N., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Pizzolotto, C., Ricci, M., Ricciarini, S. B., Rossetto, Laura, Ritabrata, S., Runtso, M. F., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G. I., Voronov, S. A., Wu, Juan, Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

This paper presents precise measurements of the differential energy spectra of quasi-trapped secondary electrons and positrons and their ratio between 80 MeV and 10 GeV in the near-equatorial region (altitudes between 350 km and 600 km). Latitudinal dependences of the spectra are analyzed in detail. The results were obtained from July until November 2006 onboard the Resurs-DK satellite by the PAMELA spectrometer, a general purpose cosmic ray detector system built around a permanent magnet spectrometer and a silicon-tungsten calorimeter., QC 20110408

Published
2009
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34. Performance of the PAMELA Si-W imaging calorimeter in space

Author

Bonvicini, V., Boezio, M., Mocchiutti, E., Vacchi, A., Zampa, G., Zampa, N., Bellotti, R., Bruno, A., Cafagna, F., Adriani, O., Bonechi, L., Bongi, M., Bottai, S., Fedele, D., Papini, P., Ricciarini, S., Spillantini, P., Taddei, E., Vannuccini, E., Castellini, G., Ricci, M., Basilevskaja, A., Kvashnin, N., Stozhkov, I., Galper, M., Grishantseva, L., Koldashov, V., Leonov, A., Mikhailov, V., Voronov, A., Yurkin, T., Zverev, G., Barbarino, G., De Rosa, G., Osteria, G., Campana, D., Casolino, M., De Pascale, P., Malvezzi, V., Marcelli, L., Minori, M., Picozza, P., Sparvoli, R., Bogomolov, A., Krutkov, Y., Vasilyev, G., Menn, W., Simon, M., Carlson, Per, Hofverberg, Petter, Orsi, Silvio, Pearce, Mark, Bonvicini, V., Boezio, M., Mocchiutti, E., Vacchi, A., Zampa, G., Zampa, N., Bellotti, R., Bruno, A., Cafagna, F., Adriani, O., Bonechi, L., Bongi, M., Bottai, S., Fedele, D., Papini, P., Ricciarini, S., Spillantini, P., Taddei, E., Vannuccini, E., Castellini, G., Ricci, M., Basilevskaja, A., Kvashnin, N., Stozhkov, I., Galper, M., Grishantseva, L., Koldashov, V., Leonov, A., Mikhailov, V., Voronov, A., Yurkin, T., Zverev, G., Barbarino, G., De Rosa, G., Osteria, G., Campana, D., Casolino, M., De Pascale, P., Malvezzi, V., Marcelli, L., Minori, M., Picozza, P., Sparvoli, R., Bogomolov, A., Krutkov, Y., Vasilyev, G., Menn, W., Simon, M., Carlson, Per, Hofverberg, Petter, Orsi, Silvio, and Pearce, Mark

Abstract

The Payload for Antimatter-Matter Exploration and Light Nuclei Astrophysics (PAMELA), primarily designed to directly measure antiparticles (antiprotons and positrons) in the cosmic radiation, was launched successfully on June 15th, 2006, and, since then, it is in continuous data taking. The calorimeter of the PAMELA apparatus has been designed to identify antiprotons from an electron background and positrons from a background of protons with high efficiency and rejection power. It is a sampling silicon-tungsten imaging calorimeter, which comprises 44 single-sided silicon sensor planes (380 μm thick) interleaved with 22 plates of tungsten absorber (0.74 X0 each). It is the first silicon-tungsten calorimeter to be launched in space. In this work we present the in-orbit performance of the calorimeter, including the measured identification capabilities. The calorimeter provides a proton rejection factor of ∼105 while keeping a high efficiency in selecting electrons and positrons, thus fulfilling the identification power needed to reach the primary scientific objectives of PAMELA. We show also that, after almost two years of operation in space, the calorimeter is still performing nominally., QC 20141013

Published
2009
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35. Dark Matter Research and the PAMELA Space Mission

Author

Picozza, P., Marcelli, L., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carlson, P., Casolino, M., Castellini, G., de Pascale, M. P., de Rosa, G., de Simone, N., di Felice, V., Galper, A. M., Grishantseva, L., Hofverberg, Petter, Leonov, A., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Malvezzi, V., Menn, W., Mikhailov, V. V., Mocchiutti, E., Orsi, Silvio, Osteria, G., Papini, P., Pearce, Mark, Ricci, M., Ricciarini, S. B., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Picozza, P., Marcelli, L., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carlson, P., Casolino, M., Castellini, G., de Pascale, M. P., de Rosa, G., de Simone, N., di Felice, V., Galper, A. M., Grishantseva, L., Hofverberg, Petter, Leonov, A., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Malvezzi, V., Menn, W., Mikhailov, V. V., Mocchiutti, E., Orsi, Silvio, Osteria, G., Papini, P., Pearce, Mark, Ricci, M., Ricciarini, S. B., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

On the 15th of June 2006, the PAMELA satellite-borne experiment was launched from the Bajkonur cosmodrome and since July 2006 it has been collected data. The core of the apparatus is a silicon-microstrip magnetic spectrometer combined with a time-of-flight system, a silicon-tungsten electromagnetic calorimeter, an anticoincidence system, a shower tail counter scintillator and a neutron detector. The overall devices allow precision studies of the charged cosmic radiation to be conducted over a wide energy range (100 MeV - 100's GeV) with high statistics. The primary scientific goal is the measurement of the antiproton and positron energy spectra in order to search for exotic sources, such as dark matter particle annihilation. PAMELA is also searching for primordial antinuclei ((He) over bar). Concomitant, but not secondary, goals are the measurements of light nuclei and their isotopes for studying the energy dependence of cosmic ray lifetimes in the Galaxy, the monitoring of the solar activity and the study of the radiation belts., QC 20120305

Published
2009
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36. Precision studies of cosmic rays with the PAMELA satellite experiment

Author

Mocchiutti, E., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., Consiglio, L., De Pascale, M. P., De Santis, C., De Simone, N., Di Felice, V., Galper, A. M., Gillard, William, Grishantseva, L., Hofverberg, Petter, Jerse, G., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mori, N., Nikonov, N. N., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Rossetto, Laura, Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Wu, Juan, Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Mocchiutti, E., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., Consiglio, L., De Pascale, M. P., De Santis, C., De Simone, N., Di Felice, V., Galper, A. M., Gillard, William, Grishantseva, L., Hofverberg, Petter, Jerse, G., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mori, N., Nikonov, N. N., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Rossetto, Laura, Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Wu, Juan, Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

The PAMELA satellite experiment was launched into low earth orbit on June 15th 2006. The combination of a permanent magnet silicon strip spectrometer, and a silicon-tungsten imaging calorimeter allows precision studies of the charged cosmic radiation to be conducted over a wide energy range (100 MeV - 200 GeV). A primary scientific goal is to search for dark matter particle annihilations by measuring the energy spectra of cosmic ray antiparticles. Latest results from the PAMELA experiment will be reviewed with a particular focus on cosmic ray antiprotons and positrons. The status of PAMELA measurements for other cosmic ray species will also be reviewed., QC 20120309

Published
2009
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37. The PAMELA space mission

Author

Adriani, O., Barbarino, G. C., Bazilevskaja, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bruno, A., Cafagna, F., Campana, D., Carlson, P., Casolinoh, M., Castellini, G., De Pascale, M. P., De Rosa, G., De Simone, N., Di Felice, V., Galperi, A. M., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Orsi, S., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Adriani, O., Barbarino, G. C., Bazilevskaja, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bruno, A., Cafagna, F., Campana, D., Carlson, P., Casolinoh, M., Castellini, G., De Pascale, M. P., De Rosa, G., De Simone, N., Di Felice, V., Galperi, A. M., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Orsi, S., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

The PAMELA (a Payload for Antimatter-Matter Exploration and Light-nuclei Astrophysics) space mission has been launched on-board the Resurs-DK1 satellite on June 15(th) 2006 from the Baikonur cosmodrome, in Kazakhstan. PAMELA is a particle spectrometer designed to study charged particles in the cosmic radiation with special focus on the investigation of the nature of dark matter, by mean of the measure of the cosmic-ray antiproton and positron spectra over the largest energy range ever achieved., QC 20110307

Published
2009
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38. Latest results from PAMELA

Author

Papini, P., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., De Simone, N., Di Felice, V., Galper, A. M., Gillard, William, Grishantseva, L., Hofverberg, Petter, Jerse, G., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Mori, N., Nikonov, N., Osteria, G., Pearce, Mark, Picozza, P., Pizzolotto, C., Ricci, M., Ricciarini, S. B., Ritabrata, S., Rossetto, Laura, Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Wu, Juan, Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Papini, P., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., De Simone, N., Di Felice, V., Galper, A. M., Gillard, William, Grishantseva, L., Hofverberg, Petter, Jerse, G., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Mori, N., Nikonov, N., Osteria, G., Pearce, Mark, Picozza, P., Pizzolotto, C., Ricci, M., Ricciarini, S. B., Ritabrata, S., Rossetto, Laura, Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Wu, Juan, Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

The PAMELA experiment is a satellite-borne apparatus designed to study charged particles in the cosmic radiation, with a particular focus on antiparticles. The detector is housed on the Resurs-DK1 satellite and it is taking data since June 2006. The main parts of the apparatus are a magnetic spectrometer, which is equipped with a silicon-microstrip tracking system and which is used to measure the rigidity and the charge of particles, and a silicon/tungsten electromagnetic calorimeter which provides particle identification. The main results about the antiparticles component of cosmic rays obtained during the first 500 days of data taking are summarized here., QC 20110301 Galileo-Galilei-Institute Conference on Dark Matter and Dark Energy, Florence, ITALY, JAN 19-MAR 12, 2009

Published
2009
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39. Secondary electron and positron fluxes in the near-Earth space observed in the ARINA and PAMELA experiments

Author

Adriani, O., Bazilevskaya, G. A., Barbarino, G. C., Bellotti, T. R., Bzheumikhova, M. A., Bogomolov, E. A., Boezio, V. M., Bonvicini, V., Bongi, M., Bonechi, L., Bottai, S., Bruno, A., Vacchi, A., Vannuccini, E., Vasiliev, G. V., Voronov, S. A., Galper, A. M., Grishantseva, L. A., Zampa, G., Zampa, N., Zverev, V. G., Casolino, M., Campana, T. D., Carlson, Per, Castellini, G., Cafagna, F., Kvashnin, A. N., Koldashov, S. V., Krutkov, S.Yu., Leonov, A. A., Malakhov, V. V., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Orsi, Silvio, Osteria, G., Papini, P., De Pascale, M. P., Picozza, T. P., Pearce, Mark, De Rosa, G., Ricci, M., Ricciarini, S. B., Simon, M., De Simone, N., Sparvoli, R., Spillantini, P., Stozhkov, Yu.I., Taddei, E., Felice, V., Fedele, D., Hofverberg, Petter, Yurkin, Yu.T., Adriani, O., Bazilevskaya, G. A., Barbarino, G. C., Bellotti, T. R., Bzheumikhova, M. A., Bogomolov, E. A., Boezio, V. M., Bonvicini, V., Bongi, M., Bonechi, L., Bottai, S., Bruno, A., Vacchi, A., Vannuccini, E., Vasiliev, G. V., Voronov, S. A., Galper, A. M., Grishantseva, L. A., Zampa, G., Zampa, N., Zverev, V. G., Casolino, M., Campana, T. D., Carlson, Per, Castellini, G., Cafagna, F., Kvashnin, A. N., Koldashov, S. V., Krutkov, S.Yu., Leonov, A. A., Malakhov, V. V., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Orsi, Silvio, Osteria, G., Papini, P., De Pascale, M. P., Picozza, T. P., Pearce, Mark, De Rosa, G., Ricci, M., Ricciarini, S. B., Simon, M., De Simone, N., Sparvoli, R., Spillantini, P., Stozhkov, Yu.I., Taddei, E., Felice, V., Fedele, D., Hofverberg, Petter, and Yurkin, Yu.T.

Abstract

Secondary electron and positron fluxes in the energy range from 3 MeV to 7 GeV were measured with the ARINA and PAMELA spectrometers onboard the Resurs-DK satellite launched on June 15, 2006 into an elliptical orbit with an inclination of 70.4° and an altitude of 350-600 km. It is shown that positrons dominate over electrons by a factor of up to 4-5 in the geomagnetic equator region (L < 1.2 and B > 0.25)., QC 20141006

Published
2009
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40. International Russian-Italian mission 'Rim-Pamela

Author

Galper, A. M., Picozza, P., Adriani, O., Ambriola, M., Barbarino, G. C., Basili, A., Bazilevskaja, G. A., Beliotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bongiorno, L., Bonvicini, V., Bruno, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., De Rosa, G., Di Felice, V., Fedele, D., Hofverberg, Petter, Grishantseva, L. A., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Lundquist, J., Maksumov, O., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Minori, M., Mocchiutti, E., Morselli, A., Orsi, Silvio, Osteria, G., Papini, P., Pearce, Mark, Ricci, M., Ricciarini, S. B., Runtso, M. F., Russo, S., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Taddei, E., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Galper, A. M., Picozza, P., Adriani, O., Ambriola, M., Barbarino, G. C., Basili, A., Bazilevskaja, G. A., Beliotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bongiorno, L., Bonvicini, V., Bruno, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., De Rosa, G., Di Felice, V., Fedele, D., Hofverberg, Petter, Grishantseva, L. A., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Lundquist, J., Maksumov, O., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Minori, M., Mocchiutti, E., Morselli, A., Orsi, Silvio, Osteria, G., Papini, P., Pearce, Mark, Ricci, M., Ricciarini, S. B., Runtso, M. F., Russo, S., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Taddei, E., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

The successful launch of spacecraft "RESURS DK" 1 with precision magnetic spectrometer "PAMELA" onboard was executed at Baikonur cosmodrome 15 June 2006. The primary phase of realization of International Russian-Italian Project "RIM-PAMELA" with German and Swedish scientists' participation has begun since the launch of instrument "PAMELA" that has mainly been directed to investigate the fluxes of galactic cosmic rays. This report contains the main scientific Project's tasks and the conditions of science program's implementation after one year since exploration has commenced., QC 20140923

Published
2009
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41. Positrons and electrons in primary cosmic rays as measured in the PAMELA experiment

Author

Adriani, O., Bazilevskaya, G. A., Barbarino, G. C., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S. V., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carlson, P., Casolino, M., Castellini, G., Pascale, M. P., Rosa, G., Fedele, D., Felice, V., Galper, A. M., Grishantseva, L. A., Hofverberg, Petter, Leonov, A. A., Koldashov, S. V., Krutkov, S.Yu., Kvashnin, A. N., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Minori, M., Mocchiutti, E., Orsi, Silvio, Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Simone, N., Sparvoli, R., Spillantini, P., Stozhkov, Yu.I., Taddei, E., Vacchi, A., Vannuccini, E., Vasil'ev, G. V., Voronov, S. A., Yurkin, Yu.T., Zampa, G., Zampa, N., Zverev, V. G., Adriani, O., Bazilevskaya, G. A., Barbarino, G. C., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S. V., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carlson, P., Casolino, M., Castellini, G., Pascale, M. P., Rosa, G., Fedele, D., Felice, V., Galper, A. M., Grishantseva, L. A., Hofverberg, Petter, Leonov, A. A., Koldashov, S. V., Krutkov, S.Yu., Kvashnin, A. N., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Minori, M., Mocchiutti, E., Orsi, Silvio, Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Simone, N., Sparvoli, R., Spillantini, P., Stozhkov, Yu.I., Taddei, E., Vacchi, A., Vannuccini, E., Vasil'ev, G. V., Voronov, S. A., Yurkin, Yu.T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

The PAMELA experiment is being carried out on board the Russian satellite Resurs DK1 placed in the near-earth near-polar orbit on June 15, 2006. The apparatus comprising a silicon-strip magnetic spectrometer and an electromagnetic calorimeter allows measurement of electron and positron fluxes in cosmic rays in a wide energy interval from ∼100 MeV to hundreds of GeV. The high-energy electron and positron separation technique is discussed and the data on positron-to-electron ratio in primary cosmic rays up to E ≃ 10 GeV from the 2006 - 2007 measurements are reported in this work., QC 20141007

Published
2009
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42. The PAMELA space experiment

Author

Mocchiutti, E., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., De Simone, N., Di Felice, V., Galper, A. M., Gillard, W., Grishantseva, L., Hofverberg, Petter, Jerse, G., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Maksumov, O., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Nikonov, N. N., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Rossetto, Laura, Runtso, M., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Wu, J., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Mocchiutti, E., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carbone, R., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., De Simone, N., Di Felice, V., Galper, A. M., Gillard, W., Grishantseva, L., Hofverberg, Petter, Jerse, G., Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Maksumov, O., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Nikonov, N. N., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Rossetto, Laura, Runtso, M., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Wu, J., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

The 15th of June 2006, the PAMELA satellite-borne experiment was launched from the Baikonur cosmodrome and it has been collecting data since July 2006. The apparatus comprises a time-of-flight system, a silicon-microstrip magnetic spectrometer, a silicon-tungsten electromagnetic calorimeter, an anticoincidence system, a shower tail counter scintillator and a neutron detector. The combination of these devices allows precision studies of the charged cosmic radiation to be conducted over a wide energy range (100 MeV - 100's GeV) with high statistics. The primary scientific goal is the measurement of the antiproton and positron energy spectrum in order to search for exotic sources, such as dark matter particle annihilations. PAMELA is also searching for primordial antinuclei (anti-helium) and testing cosmic-ray propagation models through precise measurements of the anti-particle energy spectrum and precision studies of light nuclei and their isotopes. Moreover, PAMELA is investigating phenomena connected with solar and earth physics., QC 20150421

Published
2009

43. Comparison of models and measurements of protons of trapped and secondary origin with PAMELA experiment

Author

De Simone, N., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellottik, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bottai, S., Brunok, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., De Santis, C., De Pascale, M. P., De Rosa, G., Di Felice, V., Galper, A. M., Grishantseva, L., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Nikonov, N., Osteria, G., Papini, P., Peroni, M., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., De Simone, N., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellottik, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bottai, S., Brunok, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., De Santis, C., De Pascale, M. P., De Rosa, G., Di Felice, V., Galper, A. M., Grishantseva, L., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Nikonov, N., Osteria, G., Papini, P., Peroni, M., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

PAMELA is a satellite borne experiment designed to study with great accuracy cosmic rays of galactic, solar, and trapped nature in a wide energy range (protons: 80 MeV-700 GeV, electrons 50 MeV-400 GeV). Main objective is the study of the antimatter component: Antiprotons (80 MeV-190 GeV), positrons (50 MeV-270 GeV) and search for antinuclei with a precision of the order of 10-8). The experiment, housed on board the Russian Resurs- DK1 satellite, was launched on June, 15th 2006 in a 350x600 km orbit with an inclination of 70 degrees. In this work we present the measurement of galactic and reentrant albedo proton spectra in the energy range between 100 MeV and 300 GeV. The galactic protons refer to the period 2006-2008, showing evidence of Solar modulation effects even during the solar minimum., QC 20150420

Published
2009

44. Measurement of the He nuclei flux at high energies with the PAMELA experiment

Author

Mori, N., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellottik, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bottai, S., Brunok, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., De Rosa, G., De Simone, N., Di Felice, V., Galper, A. M., Grishantseva, L., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Mori, N., Adriani, O., Barbarino, G. C., Bazilevskaya, G. A., Bellottik, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bottai, S., Brunok, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., De Rosa, G., De Simone, N., Di Felice, V., Galper, A. M., Grishantseva, L., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Leonov, A., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

The PAMELA experiment is a satellitebased apparatus launched in June 2006. Its core instrument is a magnetic spectrometer, whose high spatial resolution (∼ 3 micron) provides the discriminative power to separate particles and antiparticles. It can measure the momentum and the energy-loss rate of an incident particles, thus allowing to identify higher charges (up to Z ≃ 5). The main goal for PAMELA is a precise measurement of the light antimatter component in cosmic rays (antiprotons, positrons), with unprecedented statistics and over a largely unexplored energy range. The instrument characteristics and the large statistics allow to precisely measure absolute fluxes for various cosmic-ray species up to high energy. Here the He flux analysis above some GeV is presented., QC 20150421

Published
2009

45. Sub-cutoff electrons and positrons in the near Earth space

Author

Grishantseva, L. A., Adriani, O., Barbarino, G., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S. V., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., Di Felice, V., Galper, A. M., Hofverberg, Petter, Leonov, A. A., Koldashov, S. V., Krutkov, S.Yu., Kvashnin, A. N., Malakhov, V. V., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S., Simon, M., De Simone, N., Sparvoli, R., Spillantini, P., Stozhkov, Yu.I., Vacchi, A., Vannuccini, E., Vasiliev, G. V., Voronov, S. A., Yurkin, Yu.T., Zampa, G., Zampa, N., Zverev, V. G., Grishantseva, L. A., Adriani, O., Barbarino, G., Bazilevskaya, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Borisov, S. V., Bottai, S., Bruno, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., De Pascale, M. P., Di Felice, V., Galper, A. M., Hofverberg, Petter, Leonov, A. A., Koldashov, S. V., Krutkov, S.Yu., Kvashnin, A. N., Malakhov, V. V., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Mocchiutti, E., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S., Simon, M., De Simone, N., Sparvoli, R., Spillantini, P., Stozhkov, Yu.I., Vacchi, A., Vannuccini, E., Vasiliev, G. V., Voronov, S. A., Yurkin, Yu.T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

Precise spectra of electron and positron fluxes in energy range from 80 MeV to several GeV below the geomagnetic cutoff rigidity were obtained using data of the PAMELA spectrometer. It was launched on June 15th 2006 onboard the Resurs-DK satellite on an elliptical orbit (the inclination is 70°, the altitude is 350-610 km). The work presents measurements of secondary lepton fluxes produced in interactions of cosmic ray protons with the atmosphere in the near Earth space (out of the South Atlantic Anomaly). Latitudinal dependences are discussed. These results are particularly interesting for more accurate definition of electron/positron flux model in the Earth magnetosphere., QC 20150421

Published
2009

46. The PAMELA space mission

Author

Adriani, O., Ambriola, M., Barbarino, G. C., Basili, A., Bazilevshja, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bongiorno, L., Bonvicini, V., Bruno, A., Cafagna, F., Campana, D., Carlson, Per J., Casolino, M., Castellini, G., De Pascale, M. P., De Rosa, G., De Simone, N., Di Felice, V., Fedele, D., Galper, A. M., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Lundquist, J., Maksumov, O., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Minori, M., Misin, S., Mocchiutti, E., Morselli, A., Nikonov, N. N., Orsi, Silvio, Osteria, G., Papini, P., Pearce, Mark J., Picozza, P., Ricci, M., Ricciarini, S. B., Runtso, M. F., Russo, S., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Taddei, E., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Adriani, O., Ambriola, M., Barbarino, G. C., Basili, A., Bazilevshja, G. A., Bellotti, R., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bongiorno, L., Bonvicini, V., Bruno, A., Cafagna, F., Campana, D., Carlson, Per J., Casolino, M., Castellini, G., De Pascale, M. P., De Rosa, G., De Simone, N., Di Felice, V., Fedele, D., Galper, A. M., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Y., Kvashnin, A. N., Lundquist, J., Maksumov, O., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Minori, M., Misin, S., Mocchiutti, E., Morselli, A., Nikonov, N. N., Orsi, Silvio, Osteria, G., Papini, P., Pearce, Mark J., Picozza, P., Ricci, M., Ricciarini, S. B., Runtso, M. F., Russo, S., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Taddei, E., Vacchi, A., Vannuccini, E., Vasilyev, G., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

The PAMELA (a Payload for Antimatter-Matter Exploration and Light-nuclei Astrophysics) experiment, is a satellite-borne particle spectrometer. It was launched on 15th June 2006 from the Baikonur cosmodrome in Kazakhstan, is installed into the Russian Resurs-DK1 satellite. PAMELA is composed of a time-of-flight system, a magnetic spectrometer, a silicon-tungsten electromagnetic calorimeter, an anticoincidence system, a shower tail catcher scintillator and a neutron detector. Among the PAMELA major objectives are the study of charged particles in the cosmic radiation, the investigation of the nature of dark matter, by mean of the measure of the cosmic-ray antiproton and positron spectra over the largest energy range ever achieved. PAMELA has been in a nearly continuous data taking mode since llth July 2006. The status of the apparatus and performances will be presented., QC 20141002

Published
2008
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47. Launch of the space experiment PAMELA

Author

Casolino, M., Picozza, P., Altamura, F., Basili, A., De Simone, N., Di Felice, V., De Pascale, M. P., Marcelli, L., Minori, M., Nagni, M., Sparvoli, R., Galper, A. M., Mikhailov, V. V., Runtso, M. F., Voronov, S. A., Yurkin, Y. T., Zverev, V. G., Castellini, G., Adriani, O., Bonechi, L., Bongi, M., Taddei, E., Vannuccini, E., Fedele, D., Papini, P., Ricciarini, S. B., Spillantini, P., Ambriola, M., Cafagna, F., De Marzo, C., Barbarino, G. C., Campana, D., De Rosa, G., Osteria, G., Russo, S., Bazilevskaja, G. A., Kvashnin, A. N., Maksumov, O., Misin, S., Stozhkov, Yu. I., Bogomolov, E. A., Krutkov, S. Yu., Nikonov, N. N., Bonvicini, V., Boezio, M., Lundquist, J., Mocchiutti, E., Vacchi, A., Zampa, G., Zampa, N., Bongiorno, L., Ricci, M., Carlson, Per, Hofverberg, Petter, Lund, Jens, Orsi, Silvio, Pearce, Mark, Menn, W., Simon, M., Casolino, M., Picozza, P., Altamura, F., Basili, A., De Simone, N., Di Felice, V., De Pascale, M. P., Marcelli, L., Minori, M., Nagni, M., Sparvoli, R., Galper, A. M., Mikhailov, V. V., Runtso, M. F., Voronov, S. A., Yurkin, Y. T., Zverev, V. G., Castellini, G., Adriani, O., Bonechi, L., Bongi, M., Taddei, E., Vannuccini, E., Fedele, D., Papini, P., Ricciarini, S. B., Spillantini, P., Ambriola, M., Cafagna, F., De Marzo, C., Barbarino, G. C., Campana, D., De Rosa, G., Osteria, G., Russo, S., Bazilevskaja, G. A., Kvashnin, A. N., Maksumov, O., Misin, S., Stozhkov, Yu. I., Bogomolov, E. A., Krutkov, S. Yu., Nikonov, N. N., Bonvicini, V., Boezio, M., Lundquist, J., Mocchiutti, E., Vacchi, A., Zampa, G., Zampa, N., Bongiorno, L., Ricci, M., Carlson, Per, Hofverberg, Petter, Lund, Jens, Orsi, Silvio, Pearce, Mark, Menn, W., and Simon, M.

Abstract

PAMELA is a satellite borne experiment designed to study with great accuracy cosmic rays of galactic, solar, and trapped nature in a wide energy range (protons 80 MeV-700 GeV, electrons 50 MeV-400 GeV). Main objective is the study of the antimatter component: antiprotons (80 MeV-190 GeV), positrons (50 MeV-270 GeV) and search for antimatter with a precision of the order of 10-8. The experiment, housed on board the Russian Resurs-DK I satellite, was launched on June 15th, 2006 in a 350 x 600 km orbit with all inclination of 70'. The detector is composed of a series of scintillator counters arranged at the extremities of a permanent magnet spectrometer to provide charge, time-of-flight, and rigidity information. Lepton/hadron identification is performed by a silicon-tungsten calorimeter and a neutron detector placed at the bottom of the device. An anticounter system is used offline to reject false triggers coming from the satellite. In self-trigger mode the calorimeter, the neutron detector, and a shower tail catcher are capable of an independent measure of the lepton component up to 2 TeV. In this work we describe the experiment, its scientific objectives, and the performance in the first months after launch., QC 20110429

Published
2008
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48. Magnetospheric and solar physics observations with the PAMELA experiment

Author

Casolino, M., Adriani, O., Ambriola, M., Barbarino, G. C., Basili, A., Bazilevskaja, G. A., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bruno, A., Cafagna, F., Campana, D., Carlson, Per, Castellini, G., De Marzo, C., De Pascale, M. P., De Rosa, G., De Simone, N., Di Felice, V., Fedele, D., Galper, A. M., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Yu., Kvashnin, A. N., Lundquist, J., Maksumov, O., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Minori, M., Misin, S., Mocchiutti, E., Morselli, A., Nikonov, N. N., Orsi, S., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Runtso, M. F., Russo, S., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Yu. I., Taddei, E., Vacchi, A., Vannuccini, E., Vasilyev, G. I., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Casolino, M., Adriani, O., Ambriola, M., Barbarino, G. C., Basili, A., Bazilevskaja, G. A., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bonvicini, V., Bruno, A., Cafagna, F., Campana, D., Carlson, Per, Castellini, G., De Marzo, C., De Pascale, M. P., De Rosa, G., De Simone, N., Di Felice, V., Fedele, D., Galper, A. M., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Yu., Kvashnin, A. N., Lundquist, J., Maksumov, O., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Minori, M., Misin, S., Mocchiutti, E., Morselli, A., Nikonov, N. N., Orsi, S., Osteria, G., Papini, P., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Runtso, M. F., Russo, S., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Yu. I., Taddei, E., Vacchi, A., Vannuccini, E., Vasilyev, G. I., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

PAMELA is a satellite-borne experiment designed to make long duration measurements of the cosmic radiation in Low Earth Orbit. It is devoted to the detection of the cosmic-ray spectra in the 100 MeV-300 GeV range with primary scientific goal the measurement of antiproton and positron spectra over the largest energy range ever achieved. Other tasks include the search for antinuclei with unprecedented sensitivity and the measurement of the light nuclear component of cosmic rays. In addition, PAMELA can investigate phenomena connected with solar and Earth physics. The apparatus consists of: a Time of Flight system, a magnetic spectrometer, an electromagnetic imaging calorimeter, a shower tail catcher scintillator, a neutron detector and an anticoincidence system. In this work we present some measurements of galactic, secondary and trapped particles performed in the first months of operation., 1st Roma International Conference on Astroparticle Physics Location: Rome, ITALY Date: JUN 20-22, 2007

Published
2008
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49. In-flight performances of the PAMELA satellite experiment

Author

Papini, P., Adriani, O., Ambriola, M., Barbarino, G. C., Basili, A., Bazilevskaja, G. A., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bongiorno, L., Bonvicini, V., Bruno, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., Conrad, Jan, De Marzo, C., De Pascale, M. P., De Rosa, G., Di Felice, V., Fedele, D., Galper, A. M., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Yu., Kvashnin, A. N., Lund, Jens, Lundquist, J., Maksumov, O., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Minori, M., Misin, S., Mocchiutti, E., Morselli, A., Nikonov, N. N., Orsi, S., Osteria, G., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Runtso, M. F., Russo, S., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Yu. I., Taddei, E., Vacchi, A., Vannuccini, E., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., Zverev, V. G., Papini, P., Adriani, O., Ambriola, M., Barbarino, G. C., Basili, A., Bazilevskaja, G. A., Boezio, M., Bogomolov, E. A., Bonechi, L., Bongi, M., Bongiorno, L., Bonvicini, V., Bruno, A., Cafagna, F., Campana, D., Carlson, Per, Casolino, M., Castellini, G., Conrad, Jan, De Marzo, C., De Pascale, M. P., De Rosa, G., Di Felice, V., Fedele, D., Galper, A. M., Hofverberg, Petter, Koldashov, S. V., Krutkov, S. Yu., Kvashnin, A. N., Lund, Jens, Lundquist, J., Maksumov, O., Malvezzi, V., Marcelli, L., Menn, W., Mikhailov, V. V., Minori, M., Misin, S., Mocchiutti, E., Morselli, A., Nikonov, N. N., Orsi, S., Osteria, G., Pearce, Mark, Picozza, P., Ricci, M., Ricciarini, S. B., Runtso, M. F., Russo, S., Simon, M., Sparvoli, R., Spillantini, P., Stozhkov, Yu. I., Taddei, E., Vacchi, A., Vannuccini, E., Voronov, S. A., Yurkin, Y. T., Zampa, G., Zampa, N., and Zverev, V. G.

Abstract

PAMELA is a satcllite-borne experiment designed to study with great accuracy charged particles in the cosmic radiation with a particular focus on antiparticles. The experiment, housed on board the Russian Resurs-DK1 satellite, was launched on June 15, 2006 in a 350 x 600 km orbit with an inclination of 70 degrees. The apparatus comprises a time-of-flight system, a silicon-microstrip magnetic spectrometer, a silicon-tungsten electromagnetic calorimeter, an anticoincidence system, a shower tail catcher scintillator and a neutron detector. The combination of these devices allows charged particle identification over a wide energy range. In this work, the detector design is reviewed and the in-orbit performances in the first months after the launch are presented., 1st Roma International Conference on Astroparticle Physics Location: Rome, ITALY Date: JUN 20-22, 2007

Published
2008
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50. The Pamela experiment ready for flight

Author

Adriani, O., Carlson, Per, Hofverberg, Petter, Pearce, Mark, Orsi, Silvio, Lund, J., Zampa, N., et. al., Adriani, O., Carlson, Per, Hofverberg, Petter, Pearce, Mark, Orsi, Silvio, Lund, J., Zampa, N., and et. al.

Abstract

The Pamela apparatus will allow precise measurements of cosmic rays in Low Earth Orbit, mainly focusing on the antiparticles component. The apparatus is now ready for flight, and the launch is foreseen during June 2006. The paper briefly reports the status of the experiment, and the performances of the various components as measured before the launch., Conference: 10th Pisa Meeting on Advanced Detectors. La Biodola, ITALY. MAY 21-27, 2006

Published
2007
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