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1. Measurement of the forward η meson production rate in p-p collisions at s $$ \sqrt{\textrm{s}} $$ = 13 TeV with the LHCf-Arm2 detector

Author

O. Adriani, E. Berti, P. Betti, L. Bonechi, M. Bongi, R. D’Alessandro, S. Detti, M. Hagenauer, Y. Itow, K. Kasahara, Y. Kitagami, M. Kondo, Y. Matsubara, H. Menjo, Y. Muraki, K. Ohashi, P. Papini, G. Piparo, S. Ricciarini, T. Sako, N. Sakurai, M. Scaringella, Y. Shimizu, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W. C. Turner, and K. Yoshida

Subjects
Forward Physics, Hadron-Hadron Scattering, Particle and Resonance Production, QCD, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract The forward η mesons production has been observed by the Large Hadron Collider forward (LHCf) experiment in proton-proton collision at s $$ \sqrt{s} $$ = 13 TeV. This paper presents the measurement of the inclusive production rate of η in p T < 1.1 GeV/c, expressed as a function of the Feynman-x variable. These results are compared with the predictions of several hadronic interaction models commonly used for the modelling of the air showers produced by ultra-high energy cosmic rays. This is both the first measurement of η mesons from LHCf and the first time a particle containing strange quarks has been observed in the forward region for high-energy collisions. These results will provide a powerful constraint on hadronic interaction models for the purpose of improving the understanding of the processes underlying the air showers produced in the Earth’s atmosphere by ultra-energetic cosmic rays.

Published
2023
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2. Recent progress of JT-60SA project toward plasma operation

Author

H. Shirai, K. Takahashi, E. Di Pietro, D. Abate, W. Abdel Maksoud, H. Abe, N. Aiba, T. Abe, M. Akimitsu, J. Ayllon-Guerola, T. Arai, J.-F. Artaud, N. Asakura, N. Ashikawa, L. Balbinot, P. Barabaschi, O. Baulaigue, E. Belonohy, A. Belpane, W. Bin, F. Bombarda, T. Bolzonella, F. Bonne, M. Bonotto, J. Botija, J. Buermans, S. Cabrera-Pérez, A. Cardella, D. Carralero, L. Carraro, J. Cavalier, M. Cavinato, M. Chernyshova, S. Chiba, S. Clement-Lorenzo, V. Cocilovo, S. Coda, R. Coelho, I. Coffey, B. Collin, V. Corato, A. Cucchiaro, T. Czarski, M. Dairaku, S. Davis, C. Day, E. Dela Luna, G. De Tommasi, P. Decool, L. Di Pace, M. Dibon, G. Disset, F. D’Lsa, A. Ejiri, Y. Endo, N. Ezumi, G. Falchetto, A. Fassina, P. Fejoz, A. Ferro, W. Fietz, L. Figini, T. Fornal, G. Frello, T. Fujita, T. Fukuda, K. Fukui, M. Fukumoto, H. Funaba, M. Furukawa, S. Futatani, L. Gabellieri, E. Gaio, K. Galazka, J. Garcia, J. Garcia-Dominguez, J. Garcia-Lopez, M. Garcia-Munoz, L. Garzotti, F. Gasparini, S. Gharafi, L. Giacomelli, G. Ginoulhiac, G. Giruzzi, L. Giudicotti, J. Gonzalez-Martin, R. Guillén-González, N. Hajnal, S. Hall, K. Hamada, K. Hanada, M. Hanada, K. Hasegawa, S. Hatakeyama, V. Hauer, N. Hayashi, T. Hayashi, R. Heller, J. Hidalgo-Salaverri, S. Higashijima, J. Hinata, S. Hiranai, J. Hiratsuka, R. Hiwatari, C. Hoa, H. Homma, A. Honda, M. Honda, K. Hoshino, H. Hurzlmeier, M. Iafrati, K. Ibano, H. Ichige, M. Ichikawa, M. Ichimura, K. Ida, S. Ide, H. Idei, M. Iguchi, T. Iijima, S. Iio, R. Ikeda, Y. Ikeda, T. Imai, R. Imazawa, S. Inagaki, M. Inomoto, S. Inoue, A. Isayama, S. Ishida, Y. Ishii, M. Isobe, F. Janky, E. Joffrin, A. Jokinen, S. Kado, S. Kajita, K. Kajiwara, Y. Kamada, I. Kamata, A. Kaminaga, K. Kamiya, D. Kanapienyte, Y. Kashiwa, M. Kashiwagi, K. Katayama, Y. Kawamata, G. Kawamura, K. Kawano, Y. Kazakov, K. Kimura, F. Kin, M. Kisaki, S. Kitajima, K. Kiyono, K. Kizu, Y. Ko, K. Kobayashi, M. Kobayashi, S. Kobayashi, Ta. Kobayashi, To. Kobayashi, G. Kocsis, A. Kojima, S. Kokusen, M. Komata, K. Komuro, S. Konishi, A. Kovacsik, I. Ksiazek, M. Kubkowska, G. Kühner, M. Kuramochi, K. Kurihara, T. Kurki-Suonio, A.B. Kurniawan, T. Kuwata, B. Lacroix, V. Lamaison, A. Lampasi, P. Lang, P. Lauber, K. Lawson, Q. LeCoz, A. Louzguiti, R. Maekawa, T. Maekawa, S. Maeyama, G. Maffia, P. Maget, J. Mailloux, I. Maione, A. Maistrello, K. Malinowski, A. Mancini, G. Marchiori, J.-L. Marechal, V. Massaut, S. Masuzaki, R. Matoike, G. Matsunaga, S. Matsunaga, A. Matsuyama, Ch Mayri, M. Mattei, M. Medrano, A. Mele, I. Meyer, F. Michel, T. Minami, Y. Miyata, J. Miyazawa, Y. Miyo, T. Mizuuchi, K. Mogaki, J. Morales, P. Moreau, T. Morisaki, S. Morishima, S. Moriyama, A. Moro, H. Murakami, M. Murayama, S. Murakami, K. Nagasaki, O. Naito, N. Nakamura, S. Nakamura, T. Nakano, Y. Nakashima, V. Nardino, E. Narita, Y. Narushima, K. Natsume, S. Nemoto, R. Neu, S. Nicollet, M. Nishikawa, S. Nishimura, T. Nishitani, M. Nishiura, T. Nishiyama, M. Nocente, Y. Nobuta, L. Novello, F. Nunio, S. Ochoa, K. Ogawa, T. Ogawa, Y. Ogawa, S. Ohdachi, Y. Ohmori, N. Ohno, Y. Ohtani, K. Ohtsu, M. Ohzeki, T. Oishi, J. Okano, K. Okano, Y. Onishi, M. Osakabe, T. Oshima, V. Ostuni, A. Owada, M. Oya, Y. Oya, T. Ozeki, M.M. Parody Guzmán, R. Pasqualotto, S. Pelli, E. Perelli, E. Peretti, G. Phillips, C. Piccinni, L. Pigatto, A. Pironti, A. Pizzuto, B. Plöckl, G. Polli, J.-M. Poncet, P. Ponsot, G. Pucella, M. Puiatti, D. Radloff, V. Raimondi, F. Ramos, P. Rancsik, D. Ricci, S. Ricciarini, N. Richermoz, E. Rincon, A. Romano, P. Rossi, P. Roussel, G. Rubino, H. Saeki, A. Sagara, S. Sakakibara, H. Sakamoto, Miki Sakamoto, Mizu Sakamoto, Y. Sakamoto, A. Sakasai, S. Sakata, R. Sakurai, B. Salanon, A. Salmi, G. Sannazzaro, R. Sano, A. Sanpei, T. Sasajima, S. Sasaki, H. Sasao, F. Sato, M. Sato, T. Sato, M. Sawahata, A. Scherber, S. Scully, J. Segado-Fernandez, M. Seki, N. Seki, S. Seki, Y. Shibama, Y. Shibata, T. Shikama, K. Shimada, M. Shimono, J. Shinde, T. Shinya, K. Shinohara, J. Shiraishi, S. Soare, A. Soleto, Y. Someya, S. Sonoda, C. Sozzi, E. Streciwilk-Kowalska, H. Strobel, M. Sueoka, A. Sukegawa, S. Sumida, H. Suzuki, Ma Suzuki, Mi Suzuki, S. Suzuki, T. Suzuki, Y. Suzuki, J. Svoboda, T. Szabolics, T. Szepesi, Y. Takase, M. Takechi, K. Takeda, Y. Takeiri, H. Takenaga, C. Taliercio, N. Tamura, Hiro Tanaka, Hito Tanaka, K. Tanaka, Y. Tanaka, K. Tani, H. Tanigawa, M. Tardocchi, A. Terakado, M. Terakado, T. Terakado, B. Teuchner, B. Tilia, H. Tobari, H. Tobita, K. Tobita, K. Toi, N. Toida, H. Tojo, M. Tokitani, T. Tokuzawa, V. Tormarchio, M. Tomine, A. Torre, T. Totsuka, K. Tsuchiya, N. Tsujii, D. Tsuru, H. Tsutsui, M. Uchida, Y. Ueda, J. Uno, H. Urano, K. Usui, H. Utoh, M. Valisa, M. Vallar, R. Vallcorba-Carbonel, J.-C. Vallet, J. Varela, J. Vega, M. Verrecchia, L. Vieillard, F. Villone, P. Vincenzi, K. Wada, R. Wada, T. Wakatsuki, M. Wanner, F. Watanabe, K. Watanabe, S. Watanabe, T. Wauters, S. Wiesen, M. Wischmeier, M. Yagi, J. Yagyu, M. Yajima, S. Yamamoto, H. Yamanaka, K. Yamauchi, Y. Yamauchi, H. Yamazaki, K. Yamazaki, R. Yamazaki, S. Yamoto, S. Yanagi, K. Yanagihara, S. Yokooka, M. Yokoyama, T. Yokoyama, M. Yoshida, M. Yoshimura, N. Yoshizawa, K. Yuinawa, L. Zani, and P. Zito

Subjects
JT-60SA, superconducting tokamak, risk mitigation measures, integrated commissioning, maintenance and enhancement, international collaboration, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Superconducting (SC) tokamak JT-60SA plays an essential role in fusion research and development by supporting and complementing the ITER project, providing directions to the DEMO design activity and fostering next generation scientists and engineers. Since the short circuit incident at the terminal joints of equilibrium field coil #1 during the integrated commissioning (IC) in March 2021, both EU and JA implementing agencies (IAs) have examined how to ensure safe operation of JT-60SA by mitigating the risk of possible discharge occurrence inside the cryostat. Based on the experience of the global Paschen tests, the IAs have established a strategy of risk mitigation measures, which is a combination of (i) reinforcement of insulation, (ii) avoiding unnecessary voltage application to the coil systems and (iii) immediate de-energization of the coils when deteriorated vacuum conditions are detected. Thanks to the considerable efforts of the Integrated Project Team members, the IC restarted in May 2023. After confirmation of the SC state of the coil systems (TF, EF and CS), the coil energization test and the plasma operation phase 1 (OP-1) started. The first plasma was successfully achieved on 23 October 2023 with a limited value of voltage and current applied to the coils. The plasma configuration control was also confirmed with low plasma current and low auxiliary heating power conditions. Based on the IO–F4E–QST collaboration, activities of JT-60SA have been shared with the IO and provided an important lesson for ITER assembly and commissioning, and will provide an outstanding contribution to fusion research at large. After OP-1, maintenance & enhancement phase 1 (M/E-1) starts from January 2024, in which in-vessel components are installed, and heating and diagnostic systems are extensively upgraded to allow a high power heating experiment planned in OP-2. In order to make the best use of JT-60SA, a newly organized JT-60SA experiment team will refine the research plan for the future high heating power operation phase.

Published
2024
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3. Measurement of energy flow, cross section and average inelasticity of forward neutrons produced in s $$ \sqrt{s} $$ = 13 TeV proton-proton collisions with the LHCf Arm2 detector

Author

The LHCf collaboration, O. Adriani, E. Berti, L. Bonechi, M. Bongi, R. D’Alessandro, S. Detti, M. Haguenauer, Y. Itow, K. Kasahara, H. Menjo, Y. Muraki, K. Ohashi, P. Papini, S. Ricciarini, T. Sako, N. Sakurai, K. Sato, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W.C. Turner, and M. Ueno

Subjects
Forward physics, Hadron-Hadron scattering (experiments), Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract In this paper, we report the measurement of the energy flow, the cross section and the average inelasticity of forward neutrons (+ antineutrons) produced in s $$ \sqrt{s} $$ = 13 TeV proton-proton collisions. These quantities are obtained from the inclusive differential production cross section, measured using the LHCf Arm2 detector at the CERN Large Hadron Collider. The measurements are performed in six pseudorapidity regions: three of them (η > 10.75, 8.99 < η < 9.21 and 8.80 < η < 8.99), albeit with smaller acceptance and larger uncertainties, were already published in a previous work, whereas the remaining three (10.06 < η < 10.75, 9.65 < η < 10.06 and 8.65 < η < 8.80) are presented here for the first time. The analysis was carried out using a data set acquired in June 2015 with a corresponding integrated luminosity of 0.194 nb −1. Comparing the experimental measurements with the expectations of several hadronic interaction models used to simulate cosmic ray air showers, none of these generators resulted to have a satisfactory agreement in all the phase space selected for the analysis. The inclusive differential production cross section for η > 10.75 is not reproduced by any model, whereas the results still indicate a significant but less serious deviation at lower pseudorapidities. Depending on the pseudorapidity region, the generators showing the best overall agreement with data are either SIBYLL 2.3 or EPOS-LHC. Furthermore, apart from the most forward region, the derived energy flow and cross section distributions are best reproduced by EPOS-LHC. Finally, even if none of the models describe the elasticity distribution in a satisfactory way, the extracted average inelasticity is consistent with the QGSJET II-04 value, while most of the other generators give values that lie just outside the experimental uncertainties.

Published
2020
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4. Measurement of inclusive forward neutron production cross section in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV with the LHCf Arm2 detector

Author

The LHCf collaboration, O. Adriani, E. Berti, L. Bonechi, M. Bongi, R. D’Alessandro, S. Detti, M. Haguenauer, Y. Itow, K. Kasahara, Y. Makino, K. Masuda, H. Menjo, Y. Muraki, K. Ohashi, P. Papini, S. Ricciarini, T. Sako, N. Sakurai, K. Sato, M. Shinoda, T. Suzuki, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W. C. Turner, M. Ueno, and Q. D. Zhou

Subjects
Forward physics, Hadron-Hadron scattering (experiments), Unfolding, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Abstract In this paper, we report the measurement relative to the production of forward neutrons in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV obtained using the LHCf Arm2 detector at the Large Hadron Collider. The results for the inclusive differential production cross section are presented as a function of energy in three different pseudorapidity regions: η > 10.76, 8.99 < η < 9.22 and 8.81 < η < 8.99. The analysis was performed using a data set acquired in June 2015 that corresponds to an integrated luminosity of 0.194 nb−1. The measurements were compared with the predictions of several hadronic interaction models used to simulate air showers generated by Ultra High Energy Cosmic Rays. None of these generators showed good agreement with the data for all pseudorapidity intervals. For η > 10.76, no model is able to reproduce the observed peak structure at around 5 TeV and all models underestimate the total production cross section: among them, QGSJET II-04 shows the smallest deficit with respect to data for the whole energy range. For 8.99 < η < 9.22 and 8.81 < η < 8.99, the models having the best overall agreement with data are SIBYLL 2.3 and EPOS-LHC, respectively: in particular, in both regions SIBYLL 2.3 is able to reproduce the observed peak structure at around 1.5–2.5 TeV.

Published
2018
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5. Measurement of forward photon production cross-section in proton–proton collisions at s=13TeV with the LHCf detector

Author

O. Adriani, E. Berti, L. Bonechi, M. Bongi, R. D'Alessandro, M. Haguenauer, Y. Itow, T. Iwata, K. Kasahara, Y. Makino, K. Masuda, E. Matsubayashi, H. Menjo, Y. Muraki, P. Papini, S. Ricciarini, T. Sako, N. Sakurai, M. Shinoda, T. Suzuki, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W.C. Turner, M. Ueno, and Q.D. Zhou

Subjects
Physics, QC1-999
Abstract

In this paper, we report the production cross-section of forward photons in the pseudorapidity regions of η>10.94 and 8.99>η>8.81, measured by the LHCf experiment with proton–proton collisions at s=13TeV. The results from the analysis of 0.191nb−1 of data obtained in June 2015 are compared to the predictions of several hadronic interaction models that are used in air-shower simulations for ultra-high-energy cosmic rays. Although none of the models agree perfectly with the data, EPOS-LHC shows the best agreement with the experimental data among the models.

Published
2018
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6. Measurement of very forward neutron energy spectra for 7 TeV proton–proton collisions at the Large Hadron Collider

Author

O. Adriani, E. Berti, L. Bonechi, M. Bongi, G. Castellini, R. D'Alessandro, M. Del Prete, M. Haguenauer, Y. Itow, K. Kasahara, K. Kawade, Y. Makino, K. Masuda, E. Matsubayashi, H. Menjo, G. Mitsuka, Y. Muraki, Y. Okuno, P. Papini, A.-L. Perrot, S. Ricciarini, T. Sako, N. Sakurai, Y. Sugiura, T. Suzuki, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W.C. Turner, and Q.D. Zhou

Subjects
LHC, Forward neutron production, Hadronic-interaction model, Physics, QC1-999
Abstract

The Large Hadron Collider forward (LHCf) experiment is designed to use the LHC to verify the hadronic-interaction models used in cosmic-ray physics. Forward baryon production is one of the crucial points to understand the development of cosmic-ray showers. We report the neutron-energy spectra for LHC s=7 TeV proton–proton collisions with the pseudo-rapidity η ranging from 8.81 to 8.99, from 8.99 to 9.22, and from 10.76 to infinity. The measured energy spectra obtained from the two independent calorimeters of Arm1 and Arm2 show the same characteristic feature before unfolding the detector responses. We unfolded the measured spectra by using the multidimensional unfolding method based on Bayesian theory, and the unfolded spectra were compared with current hadronic-interaction models. The QGSJET II-03 model predicts a high neutron production rate at the highest pseudo-rapidity range similar to our results, and the DPMJET 3.04 model describes our results well at the lower pseudo-rapidity ranges. However, no model perfectly explains the experimental results over the entire pseudo-rapidity range. The experimental data indicate a more abundant neutron production rate relative to the photon production than any model predictions studied here.

Published
2015
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7. The CALOCUBE project for a space based cosmic ray experiment: design, construction, and first performance of a high granularity calorimeter prototype

Author

O., Adriani, S., Albergo, L., Auditore, A., Basti, E., Berti, G., Bigongiari, L., Bonechi, M., Bongi, V., Bonvicini, S., Bottai, P., Brogi, G., Cappello, G., Carotenuto, G., Castellini, W., Cattaneo P., R., Cecchi, C., Checchia, R., D'Alessandro, S., Detti, M., Fasoli, N., Finetti, A., Italiano, P., Lenzi, P., Maestro, M., Manetti, S., Marrocchesi P., N., Mori, F., Morsani, M., Olmi, A., Orsini, G., Orzan, L., Pacini, P., Papini, G., Pellegriti M., A., Rappoldi, S., Ricciarini, A., Sciuto, P., Spillantini, O., Starodubtsev, L., Stiaccini, F., Stolzi, A., Sulaj, E., Suh J., A., Tiberio, A., Tricomi, A., Trifiro, M., Trimarchi, E., Vannuccini, A., Vedda, Zampa, G., and N, N. Zampa

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

Current research in High Energy Cosmic Ray Physics touches on fundamental questions regarding the origin of cosmic rays, their composition, the acceleration mechanisms, and their production. Unambiguous measurements of the energy spectra and of the composition of cosmic rays at the "knee" region could provide some of the answers to the above questions. So far only ground based observations, which rely on sophisticated models describing high energy interactions in the earth's atmosphere, have been possible due to the extremely low particle rates at these energies. A calorimetry based space experiment that could provide not only flux measurements but also energy spectra and particle identification, would certainly overcome some of the uncertainties of ground based experiments. Given the expected particle fluxes, a very large acceptance is needed to collect a sufficient quantity of data, in a time compatible with the duration of a space mission. This in turn, contrasts with the lightness and compactness requirements for space based experiments. We present a novel idea in calorimetry which addresses these issues whilst limiting the mass and volume of the detector. In this paper we report on a four year R&D program where we investigated materials, coatings, photo-sensors, Front End electronics, and mechanical structures with the aim of designing a high performance, high granularity calorimeter with the largest possible acceptance. Details are given of the design choices, component characterisation, and of the construction of a sizeable prototype (Calocube) which has been used in various tests with particle beams.

Published
2019
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9. Measurement of energy flow, cross section and average inelasticity of forward neutrons produced in $$ \sqrt{s} $$ = 13 TeV proton-proton collisions with the LHCf Arm2 detector

Author

The LHCf collaboration, O. Adriani, E. Berti, L. Bonechi, M. Bongi, R. D’Alessandro, S. Detti, M. Haguenauer, Y. Itow, K. Kasahara, H. Menjo, Y. Muraki, K. Ohashi, P. Papini, S. Ricciarini, T. Sako, N. Sakurai, K. Sato, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W.C. Turner, M. Ueno, École polytechnique (X), and LHCf

Subjects
p p: scattering, anti-n: hadroproduction, Nuclear and High Energy Physics, CERN Lab, interaction: model, Proton, 13000 GeV-cms, FOS: Physical sciences, energy flow, n: hadroproduction, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, rapidity dependence, differential cross section: measured, Nuclear physics, High Energy Physics - Experiment (hep-ex), phase space, Cross section (physics), Hadron-Hadron scattering (experiments), Energy flow, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Neutron, Elasticity (economics), Nuclear Experiment, 010306 general physics, Physics, air: showers, Large Hadron Collider, showers: atmosphere, hep-ex, 010308 nuclear & particles physics, Detector, LHC-F, 3. Good health, CERN LHC Coll, cosmic radiation, Pseudorapidity, Forward physics, lcsh:QC770-798, High Energy Physics::Experiment, numerical calculations: Monte Carlo, p p: colliding beams, Particle Physics - Experiment, experimental results
Abstract

In this paper, we report the measurement of the energy flow, the cross section and the average inelasticity of forward neutrons (+ antineutrons) produced in $\sqrt{s} = 13$ TeV proton-proton collisions. These quantities are obtained from the inclusive differential production cross section, measured using the LHCf Arm2 detector at the CERN Large Hadron Collider. The measurements are performed in six pseudorapidity regions: three of them ($��> 10.75$, $8.99 < ��< 9.21$ and $8.80 < ��< 8.99$), albeit with smaller acceptance and larger uncertainties, were already published in a previous work, whereas the remaining three ($10.06 < ��< 10.75$, $9.65 < ��< 10.06$ and $8.65 < ��< 8.80$) are presented here for the first time. The analysis was carried out using a data set acquired in June 2015 with a corresponding integrated luminosity of $\mathrm{0.194~nb^{-1}}$. Comparing the experimental measurements with the expectations of several hadronic interaction models used to simulate cosmic ray air showers, none of these generators resulted to have a satisfactory agreement in all the phase space selected for the analysis. The inclusive differential production cross section for $��> 10.75$ is not reproduced by any model, whereas the results still indicate a significant but less serious deviation at lower pseudorapidities. Depending on the pseudorapidity region, the generators showing the best overall agreement with data are either SIBYLL 2.3 or EPOS-LHC. Furthermore, apart from the most forward region, the derived energy flow and cross section distributions are best reproduced by EPOS-LHC. Finally, even if none of the models describe the elasticity distribution in a satisfactory way, the extracted average inelasticity is consistent with the QGSJET II-04 value, while most of the other generators give values that lie just outside the experimental uncertainties., 22 pages, 11 figures

Published
2020

10. CaloCube: A new concept calorimeter for the detection of high energy cosmic rays in space

Author

E Berti, O Adriani, S Albergo, G Ambrosi, L Auditore, A Basti, G Bigongiari, L Bonechi, S Bonechi, M Bongi, V Bonvicini, S Bottai, P Brogi, G Cappello, P W Cattaneo, R D Alessandro, S Detti, M Duranti, M Fasoli, N Finetti, V Formato, M Ionica, A Italiano, P Lenzi, P Maestro, P S Marrocchesi, N Mori, G Orzan, M Olmi, L Pacini, P Papini, A Rappoldi, S Ricciarini, A Sciuto, G Silvestre, O Starodubtsev, F Stolzi, J E Suh, A Sulaj, A Tiberio, A Tricomi, A Trifirò, M Trimarchi, E Vannuccini, A Vedda, G Zampa, N Zampa, Berti, E, Adriani, O, Albergo, S, Ambrosi, G, Auditore, L, Basti, A, Bigongiari, G, Bonechi, L, Bonechi, S, Bongi, M, Bonvicini, V, Bottai, S, Brogi, P, Cappello, G, Cattaneo, P, Alessandro, R, Detti, S, Duranti, M, Fasoli, M, Finetti, N, Formato, V, Ionica, M, Italiano, A, Lenzi, P, Maestro, P, Marrocchesi, P, Mori, N, Orzan, G, Olmi, M, Pacini, L, Papini, P, Rappoldi, A, Ricciarini, S, Sciuto, A, Silvestre, G, Starodubtsev, O, Stolzi, F, Suh, J, Sulaj, A, Tiberio, A, Tricomi, A, Trifir, A, Trimarchi, M, Vannuccini, E, Vedda, A, Zampa, G, and Zampa, N

Subjects
Energy resolutions, History, Calorimeters, CsI, Physics::Instrumentation and Detectors, calorimeter, energy resolution, High Energy Physics::Experiment, High energy physics, Cosmic rays, Computer Science Applications, Education, crystal
Abstract

Given the good performances in terms of geometrical acceptance and energy resolution, calorimeters are the best suited detectors to measure high energy cosmic rays directly in space. However, in order to exploit this potential, the design of calorimeters must be carefully optimized to take into account all limitations related to space missions, due mainly to the mass of the experimental apparatus. CaloCube is a three years R&D project, approved and financed by INFN in 2014, aiming to optimize the design of a space-borne calorimeter by the use of a cubic, homogeneous and isotropic geometry. In order to maximize detector performances with respect to the total mass of the apparatus, comparative studies on different scintillating materials, different sizes of crystals and different spacings among them have been performed making use of Monte Carlo simulations. In parallel to this activity, several prototypes instrumented with CsI:Tl cubic crystals have been constructed and tested with particle beams (muons, electrons, protons and ions). Both simulations and prototypes showed that the CaloCube design leads to a good particle energy resolution (< 2% for electromagnetic showers, < 40% for hadronic showers) and a good effective geometric factor (> 3:5 m2 sr for electromagnetic showers, > 2:5 m2 sr for hadronic showers). Thanks to these performances, in 5 years of operation it would be possible to measure the ux of electrons+positrons up to some tens of TeV and the uxes of protons and nuclei up to some units of PeV/nucleon, hence extending these measurements by at least one order of magnitude in energy compared to the experiments currently operating in space.

Published
2019

11. NEUCAL, an innovative neutron detector for e/h discrimination: testbeam results

Author

S. Bottai, G. Castellini, L. Bonechi, M. Bongi, S. Ricciarini, Raffaello D'Alessandro, P. Sona, P. Papini, G. Sorichetti, M. Grandi, G. Sguazzoni, O. Adriani, and M. Calamai

Subjects
Astroparticle physics, Physics, History, Scintillation, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Detector, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Particle detector, Computer Science Applications, Education, Calorimeter, Nuclear physics, Scintillation counter, Neutron detection, Neutron, High Energy Physics::Experiment, Nuclear Experiment, physics.ins-det
Abstract

An excellent hadron to electron discrimination is a crucial aspect of calorimeter-based experiments in astroparticle physics. Standard discrimination techniques require full shower development and fine granularity but in space detectors severe limitations exist due to constraints on dimensions, weight and power consumption. A possible approach is to exploit the different neutron yield of electromagnetic and hadronic showers. NEUCAL is a light and compact innovative neutron detector, to be used as an auxiliary complement of electromagnetic calorimeters. This new approach to neutron counting relies on scintillation detectors which are sensitive to the moderation phase of the neutron component. The NEUCAL prototype has been placed after a conventional calorimeter and tested with high energy beams of pions and positrons. The comparison of experimental data with a detailed Geant4 simulation and the encouraging results obtained are presented., 6 pages, 7 figures, presented at CALOR 2010, XIV International Conference on Calorimetry in High Energy Physics, 10-14 May 2010, Beijing (China)

Published
2015

12. Recent results from LHCf

Author

H. Menjo, O. Adriani, E. Berti, L. Bonechi, M. Bongi, G. Castellini, R. D'Alessandro, M. Del Prete, M. Haguenauer, Y. Itow, K. Kasahara, K. Kawade, Y. Makino, K. Masuda, E. Matsubayashi, G. Mitsuka, Y. Muraki, P. Papini, A.-L. Perrot, D. Pfeiffer, S. Ricciarini, T. Sako, Y. Shimizu, Y. Sugiura, T. Suzuki, T. Tamura, A. Tiberio, S. Torii, A. Tricomi, W.C. Turner, and Q. Zhou

Subjects
Physics, Particle physics, Large Hadron Collider, High energy particle, QC1-999, Nuclear Theory, Hadron, Photon energy, Collision, Nuclear physics, Pion, High Energy Physics::Experiment, Ultra-high-energy cosmic ray, Neutral particle, Nuclear Experiment, Particle Physics - Experiment
Abstract

The Large Hadron Collider forward experiment measured very forward neutral particle spectra in LHC proton-proton collisions in early 2010. In this paper we will discuss the energy and transverse momentum spectra of neutral pion at the 7TeV proton-proton collision, and the inclusive photon energy spectra taken at the 900GeV collisions. The spectra in both collision energies are also compared with the predictions of several hadronic interaction models that are often used for high energy particle physics and for modeling ultra high energy cosmic ray showers.

Published
2015

13. First year results from LHCf

Author

K. Kasahara, M. Nakai, Y. Shimizu, T. Suzuki, S. Torii, K. Yoshida, T. Tamura, K. Fukatsu, Y. Itow, K. Kawade, T. Mase, K. Masuda, Y. Matsubara, G. Mitsuka, T. Sako, K. Suzuki, K. Taki, H. Menjo, Y. Muraki, M. Haguenauer, W. C. Turner, O. Adriani, L. Bonechi, M. Bongi, G. Castellini, R. D’Alessandro, M. Grandi, P. Papini, S. Ricciarini, K. Noda, A. Tricomi, A. Faus, J. Velasco, D. Macina, A.-L. Perrot, Hiroyuki Sagawa, Yoshiya Kawasaki, Takashi Sako, Masahiro Takeda, and Yoshiki Tsunesada

Subjects
Physics, air shower MC simulation, Large Hadron Collider, Monte Carlo method, Detector, Photodetector, Cosmic ray, Astrophysics, ultra high energy cosmic rays, Nuclear physics, High Energy Physics::Experiment, Limit (mathematics), LHC, Energy (signal processing)
Abstract

We give a brief description of the purpose of the LHCf experiment, detectors and their performance, and what has been done in the first year experiment. A short summary of results at ?s=900 GeV is given although the energy is not an "intrinsic" LHC energy. Since detailed results at ?s=7 TeV will appear soon elsewhere, here we limit ourselves to giving also a brief account of what will come in that paper. © 2011 American Institute of Physics.

Published
2011

14. Data Analysis Techniques For LHCf

Author

G. Mitsuka, O. Adriani, L. Bonechi, M. Bongi, G. Castellini, R. D’Alessandro, K. Fukatsu, M. Haguenauer, Y. Itow, K. Kasahara, K. Kawade, D. Marina, T. Mase, K. Masuda, Y. Matsubara, H. Menjo, Y. Muraki, M. Nakai, K. Noda, P. Papini, A.-L. Perrot, S. Ricciarini, T. Sako, Y. Shimizu, K. Suzuki, T. Suzuki, K. Taki, T. Tamura, S. Torii, A. Tricomi, W. C. Turner, K. Yoshida, Hiroyuki Sagawa, Yoshiya Kawasaki, Takashi Sako, Masahiro Takeda, and Yoshiki Tsunesada

Subjects
Data flow diagram, Nuclear physics, Physics, Acceleration, Monte Carlo method, Detector, Data analysis, Lateral aperture, Scintillator, Energy (signal processing), Computational physics
Abstract

Analysis techniques in LHCf are presented, in which all techniques are required to have a high resolution and efficiency in order to overcome the severe situation, small lateral aperture and longitudinally short length of the detector. In this paper, methods for reconstructing an energy of electromagnetic shower are discussed following the data flow of measured data and Monte Carlo simulations.

Published
2011

15. The performance of the LHCf detector

Author

T. Mase, O. Adriani, L. Bonechi, M. Bongi, G. Castellini, R. D’Alessandro, K. Fukatsu, M. Haguenauer, Y. Itow, K. Kasahara, K. Kawade, D. Macina, K. Masuda, Y. Matsubara, H. Menjo, G. Mitsuka, Y. Muraki, M. Nakai, K. Noda, P. Papini, A.-L. Perrot, S. Ricciarini, T. Sako, Y. Shimizu, K. Suzuki, T. Suzuki, K. Taki, T. Tamura, S. Torii, A. Tricomi, W. C. Turner, K. Yoshida, Hiroyuki Sagawa, Yoshiya Kawasaki, Takashi Sako, Masahiro Takeda, and Yoshiki Tsunesada

Subjects
Physics, Particle physics, Large Hadron Collider, Spectrometer, Astrophysics::High Energy Astrophysical Phenomena, Detector, Gamma ray, Electromagnetic radiation, Particle identification, Particle acceleration, Nuclear physics, Measuring instrument, High Energy Physics::Experiment, Nuclear Experiment
Abstract

The LHCf experiment is designed to measure energies and transverse momenta of neutral particles emitted in the forward region of s = 14 TeV p‐p collision at ±140 m away from the interaction point1 (IP1) of LHC. The energy resolution is confirm to be within 5% and the position resolution is better than 0.2 mm for gamma‐rays with energies from 100 GeV to 200 GeV by the test beam results at the CERN‐SPS. LHCf has taken data at 2009 and 2010 at s = 900 GeV and 7 TeV collision. A brief summary of LHCf operation at LHC is also reported here.

Published
2011

16. Status of the LHCf experiment

Author

M. Mizuishi, G. Castellini, Raffaello D'Alessandro, W. C. Turner, Yuhei Matsubara, T. Mase, Yoshitaka Itow, Kimiaki Masuda, Shoji Torii, D. Macina, M. Bongi, Y. Shimizu, A. Viciani K. Yoshida, A. L. Perrot S. Ricciarini, D. A. Faus, T. Tamura, Takashi Sako, Alessia Tricomi, P. Papini, K. Fukui, O. Adriani, Lorenzo Bonechi, M. Hagenauer, J. Velasco, K. Taki, Hiroaki Menjo, Katsuaki Kasahara, and Yasushi Muraki

Published
2010

17. The Performance of LHCf Detector

Author

K. Kawade, O. Adriani, L. Bonechi, M. Bongi, G. Castellini, R. D’Alessandro, A. Faus, M. Grandi, M. Haguenauer, Y. Itow, K. Kasahara, D. Macina, T. Mase, K. Masuda, Y. Matsubara, H. Menjo, G. Mitsuka, Y. Muraki, M. Nakai, P. Papini, A.-L. Perrot, S. Ricciarini, T. Sako, Y. Shimizu, K. Taki, T. Tamura, S. Torii, A. Tricomi, W. C. Turner, J. Velasco, A. Viciani, K. Yoshida, Hajime Susa, Marcel Arnould, Sydney Gales, Tohru Motobayashi, Christoph Scheidenberger, and Hiroaki Utsunomiya

Subjects
Physics, Particle physics, Large Hadron Collider, Interaction point, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Detector, Hadron, Gamma ray, Elementary particle, Cosmic ray, Nuclear physics, Air shower, High Energy Physics::Experiment, Nuclear Experiment
Abstract

In cosmic ray physics, the uncertainty of the hadron interaction model causes systematic errors of air shower simulations in high‐energy region. To solve the problem, the LHCf experiment measures energies and transverse momenta of neutral particles emitted in the forward region of 14 TeV p‐p collision at CERN LHC. Two LHCf detectors, consisting of sampling and imaging calorimeters, are installed at zero degree collision angle at + 140 m from the interaction point 1 (IP1). The energy resolution is confirmed as to be

Published
2010

18. LHCf: Calibration of hadron interaction models for high energy cosmic-ray physics at the LHC energy

Author

T. Mase, O. Adriani, L. Bonechi, M. Bongi, G. Castellini, R. D’Alessandro, A. Faus, M. Grandi, M. Haguenauer, Y. Itow, K. Kasahara, K. Kawade, D. Macina, K. Masuda, Y. Matsubara, H. Menjo, G. Mitsuka, Y. Muraki, M. Nakai, P. Papini, A.-L. Perrot, S. Ricciarini, T. Sako, Y. Shimizu, K. Taki, T. Tamura, S. Torii, A. Tricomi, W. C. Turner, J. Velasco, A. Viciani, K. Yoshida, Hajime Susa, Marcel Arnould, Sydney Gales, Tohru Motobayashi, Christoph Scheidenberger, and Hiroaki Utsunomiya

Subjects
Physics, Particle physics, Large Hadron Collider, Interaction point, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, Hadron, Interaction model, Cosmic ray, Elementary particle, Nuclear physics, Air shower, High Energy Physics::Experiment, Ultra-high-energy cosmic ray, Nuclear Experiment
Abstract

LHCf measures the energy and transverse momentum of neutral particles produced in the forward region of the LHC interaction point. In high energy cosmic ray measurements, the results strongly depend on the hadron interaction model which is used in the air shower simulation. LHCf will take data at s = 0.9, 2.4, 7, 10 and 14 TeV collisions at LHC and provide crucial calibration points for the hadron interaction models.

Published
2010

19. The LHCf detector at the CERN Large Hadron Collider

Author

The LHCf Collaboration, O Adriani, L Bonechi, M Bongi, G Castellini, R D'Alessandro, D A Faus, K Fukui, M Grandi, M Haguenauer, Y Itow, K Kasahara, D Macina, T Mase, K Masuda, Y Matsubara, H Menjo, M Mizuishi, Y Muraki, P Papini, A L Perrot, S Ricciarini, T Sako, Y Shimizu, K Taki, T Tamura, S Torii, A Tricomi, W C Turner, J Velasco, A Viciani, H Watanabe, and K Yoshida

Subjects
Physics, Large Hadron Collider, Luminosity (scattering theory), Interaction point, Physics::Instrumentation and Detectors, business.industry, Detector, Física, Cosmic ray, Scintillator, Particle detector, Optics, Measuring instrument, High Energy Physics::Experiment, Detectors and Experimental Techniques, business, Instrumentation, Mathematical Physics
Abstract

LHCf is an experiment dedicated to the measurement of neutral particles emitted in the very forward region of LHC collisions. The physics goal is to provide data for calibrating the hadron interaction models that are used in the study of Extremely High-Energy Cosmic-Rays. This is possible since the laboratory equivalent collision energy of LHC is 10(17) eV. Two LHCf detectors, consisting of imaging calorimeters made of tungsten plates, plastic scintillator and position sensitive sensors, are installed at zero degree collision angle +/- 140m from an interaction point (IP). Although the lateral dimensions of these calorimeters are very compact, ranging from 20 mm x 20 mm to 40 mm x 40 mm, the energy resolution is expected to be better than 6% and the position resolution better than 0.2 mm for gamma-rays with energy from 100 GeV to 7 TeV. This has been confirmed by test beam results at the CERN SPS. These calorimeters can measure particles emitted in the pseudo rapidity range eta > 8.4. Detectors, data acquisition and electronics are optimized to operate during the early phase of the LHC commissioning with luminosity below 10(30) cm(-2)S(-1). LHCf is expected to obtain data to compare with the major hadron interaction models within a week or so of operation at luminosity similar to 10(29) cm(-2)s(-1). After similar to 10 days of operation at luminosity similar to 1029 cm(-2)s(-1), the light output of the plastic scintillators is expected to degrade by similar to 10% due to radiation damage. This degradation will be monitored and corrected for using calibration pulses from a laser.

Published
2008

20. PRECISE COSMIC RAYS MEASUREMENTS WITH PAMELA

Author

S. V. Borisov, G. Zampa, S. A. Voronov, N. De Simone, P. Spillantini, E. A. Bogomolov, A. V. Karelin, C. De Santis, William Gillard, Giovanna Jerse, L. Marcelli, A. G. Mayorov, A. Vacchi, Laura Rossetto, V. V. Mikhailov, V. G. Zverev, G. C. Barbarino, G. Osteria, F. Palma, O. Adriani, R. Carbone, S. Bottai, V. Di Felice, N. N. Nikonov, W. Menn, L. Consiglio, Alfonso Monaco, Juan Wu, Roberta Sparvoli, N. Zampa, G. A. Bazilevskaya, S. Y. Krutkov, M. D. Kheymits, L. A. Grishantseva, M. Bongi, V. V. Malakhov, C. Pizzolotto, M. P. De Pascale, Nicola Mori, V. Bonvicini, Y. T. Yurkin, D. Campana, F. Cafagna, A. Bruno, Y. I. Stozhkov, Maria Teresa Ricci, P. Picozza, Roberto Bellotti, Per Carlson, Mirko Boezio, Marco Casolino, E. Mocchiutti, G. I. Vasilyev, A. N. Kvashnin, M. Simon, S. V. Koldashov, A. A. Leonov, A. M. Galper, Ritabrata Sarkar, G. Castellini, Mark Pearce, S. B. Ricciarini, P. Papini, E. Vannuccini, A., Bruno, O. c., Adriani, Barbarino, Giancarlo, G., Bazilevskaya, R. g., Bellotti, M., Boezio, E., Bogomolov, M., Bongi, V., Bonvicini, S. k., L., S., Bottai, F., Cafagna, D., Campana, R. k., Carbone, P., Carlson, M., Casolino, G., Castellini, Consiglio, Lucia, M. k., De, C. k., De, N. k., De, V. D., Felice, A., Galper, W., Gillard, L., Grishantseva, G. o., Jerse, A., Karelin, M., Kheymit, S., Koldashov, S., Krutkov, A., Kvashnin, A., Leonov, V., Malakhov, L., Marcelli, A., Mayorov, W., Menn, V., Mikhailov, E., Mocchiutti, A. c., Monaco, N. c., Mori, N. j., K., Osteria, Giuseppe, F. k., Palma, P., Papini, M., Pearce, P. k., Picozza, C., Pizzolotto, M., Ricci, S., Ricciarini, L., Rossetto, R., Sarkar, M., Simon, R. k., Sparvoli, P. c., Spillantini, Y., Stozhkov, A., Vacchi, E., Vannuccini, G., Vasilyev, S., Voronov, Y., Yurkin, J., Wu, G., Zampa, N., Zampa, and V., Zverev

Subjects
Physics, Antimatter, Cosmic rays, Dark matter, Solar modulation, Trapped radiation, Engineering (all), PAMELA detector, Astrophysics::High Energy Astrophysical Phenomena, General Engineering, Astronomy, Magnetosphere, Cosmic ray, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy, law.invention, Positron, Antiproton, law, lcsh:TA1-2040, lcsh:Engineering (General). Civil engineering (General)
Abstract

The PAMELA experiment was launched on board the Resurs-DK1 satellite on June 15th 2006. The apparatus was designed to conduct precision studies of charged cosmic radiation over a wide energy range, from tens of MeV up to several hundred GeV, with unprecedented statistics. In five years of continuous data taking in space, PAMELA accurately measured the energy spectra of cosmic ray antiprotons and positrons, as well as protons, electrons and light nuclei, sometimes providing data in unexplored energetic regions. These important results have shed new light in several astrophysical fields like: an indirect search for Dark Matter, a search for cosmological antimatter (anti-Helium), and the validation of acceleration, transport and secondary production models of cosmic rays in the Galaxy. Some of the most important items of Solar and Magnetospheric physics were also investigated. Here we present the most recent results obtained by the PAMELA experiment. �� Czech Technical University in Prague, 2013.

Published
2013

21. The Pamela experiment ready for flight

Author

A. M. Galper, F. Cafagna, G. Vasiljev, A. V. Bakaldin, M. Ambriola, M. Nagni, O. Adriani, M. Simon, Silvio Orsi, W. Menn, Massimo Bongi, Roberta Sparvoli, G. A. Bazilevskaja, E. Taddei, S. A. Voronov, C. De Marzo, R. Y. Stozhkov, S. Y. Krutkov, Petter Hofverberg, P. Schiavon, John Mitchell, E. A. Bogomolov, R. Mukhametshin, Giuseppe Osteria, S. J. Stochaj, V. Malvezzi, S. V. Koldashov, D. Fedele, M. G. Korotkov, A. Grigorjeva, Mirko Boezio, Mark Pearce, S. B. Ricciarini, Marco Ricci, S. A. Stephens, N. Zampa, M. Albi, M. Circella, P. Papini, S. Russo, V. V. Mikhailov, E. Vannuccini, P. Carlson, A. Vacchi, G. Castellini, A. Basili, M. Boscherini, M. P. De Pascale, E. Streitmatter, F. Altamura, R. Bencardino, J. Lund, P. Picozza, V. Bonvicini, L. Marcelli, Roberto Bellotti, P. Spillantini, A. Morselli, E. Mocchiutti, M. Grandi, G. Zampa, S. Bottai, Y. T. Yurkin, D. Campana, Marco Casolino, M. Minori, Lorenzo Bonechi, J. Lundquist, G. C. Barbarino, L. Bongiorno, O., Adriani, M., Albi, F., Altamura, M., Ambriola, A., Bakaldin, G. C., Barbarino, A., Basili, G., Bazilevskaja, R., Bellotti, R., Bencardino, M., Boezio, E., Bogomolov, L., Bonechi, M., Bongi, L., Bongiorno, V., Bonvicini, M., Boscherini, S., Bottai, F., Cafagna, D., Campana, P., Carlson, M., Casolino, G., Castellini, M., Circella, C., De Marzo, M. P., De Pascale, D., Fedele, A. M., Galper, A., Grigorjeva, M., Grandi, P., Hofverberg, S. V., Koldashov, M. G., Korotkov, S., Krutkov, J., Lund, J., Lundquist, V., Malvezzi, L., Marcelli, W., Menn, V. V., Mikhailov, M., Minori, J. W., Mitchell, E., Mocchiutti, A., Morselli, R., Mukhametshin, M., Nagni, S., Orsi, G., Osteria, P., Papini, M., Pearce, P., Picozza, M., Ricci, S., Ricciarini, S., Russo, Schiavon, Paolo, M., Simon, P., Spillantini, R., Sparvoli, S. A., Stephen, S. J., Stochaj, R. Y., Stozhkov, E., Streitmatter, E., Taddei, A., Vacchi, E., Vannuccini, G., Vasiljev, S. A., Voronov, Y., Yurkin, G., Zampa, N., Zampa, Barbarino, Giancarlo, and Pamela, Collaboration

Subjects
Nuclear and High Energy Physics, Antiparticle, Nuclear physics, Cosmic ray, Antiprotons, Calorimeters, Cosmic rays, Particle accelerators, Spectrometers, Antiparticles component, Magnetic spectrometer, Pamela apparatus, Radiation detectors, Settore FIS/04 - Fisica Nucleare e Subnucleare, law.invention, Low earth orbit, law, Component (UML), Calorimeter, Instrumentation, Physics, Calorimeter (particle physics), PAMELA detector, Antiproton
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.

Published
2007

22. The PAMELA experiment: light-nuclei selection with stand-alone detectors

Author

V. Malvezzi, C. Pizzolotto, P. Spillantini, E. Mocchiutti, C. De Santis, S. Y. Krutkov, V. Di Felice, Matteo Martucci, Ugo Giaccari, Juan Wu, N. Zampa, G. A. Bazilevskaya, V. Bonvicini, P. Picozza, Y. I. Stozhkov, S. V. Koldashov, A. G. Mayorov, Mark Pearce, S. B. Ricciarini, Alfonso Monaco, G. Castellini, G. I. Vasilyev, Lorenzo Bonechi, V. V. Malakhov, M. Simon, A. A. Leonov, P. Papini, E. Vannuccini, Riccardo Munini, L. A. Grishantseva, O. Adriani, Ritabrata Sarkar, W. Menn, M. P. De Pascale, Nicola Mori, Giovanna Jerse, A. Bianco, Maria Teresa Ricci, S. A. Voronov, Valerio Formato, A. M. Galper, D. Campana, M. Bongi, N. N. Nikonov, F. Cafagna, N. De Simone, Marco Casolino, E. A. Bogomolov, V. V. Mikhailov, Laura Rossetto, Y. T. Yurkin, S. V. Borisov, A. V. Karelin, Mirko Boezio, R. Carbone, G. C. Barbarino, G. Osteria, Per Carlson, Roberto Bellotti, A. N. Kvashnin, F. Palma, Andrea Vacchi, L. Marcelli, A. Bruno, V. G. Zverev, S. Bottai, Roberta Sparvoli, M. D. Kheymits, G. Zampa, A D Erlykin, R P Kokoulin, A S Lidvansky, L I Meroshnichenko, M I Panasyuk, A D Panov A W Wolfendale, R., Carbone, O., Adriani, G. C., Barbarino, G. A., Bazilevskaya, R., Bellotti, A., Bianco, M., Boezio, E. A., Bogomolov, L., Bonechi, M., Bongi, V., Bonvicini, S., Borisov, S., Bottai, A., Bruno, F., Cafagna, D., Campana, P., Carlson, M., Casolino, G., Castellini, M. P., De Pascale, C., De Santi, N., De Simone, V., Di Felice, Formato, Valerio, A. M., Galper, U., Giaccari, L., Grishantseva, Jerse, Giovanna, A. V., Karelin, M. D., Kheymit, S. V., Koldashov, S. Y., Krutkov, A. N., Kvashnin, A., Leonov, V., Malakhov, V., Malvezzi, L., Marcelli, M., Martucci, A. G., Mayorov, W., Menn, V. V., Mikhailov, Mocchiutti, Emiliano, A., Monaco, N., Mori, Munini, Riccardo, N., Nikonov, G., Osteria, F., Palma, P., Papini, M., Pearce, P., Picozza, C., Pizzolotto, M., Ricci, S. B., Ricciarini, L., Rossetto, R., Sarkar, M., Simon, R., Sparvoli, P., Spillantini, Y. I., Stozhkov, Vacchi, Andrea, E., Vannuccini, G., Vasilyev, S. A., Voronov, J., Wu, Y. T., Yurkin, G., Zampa, N., Zampa, V. G., Zverev, O. c., Adriani, Barbarino, Giancarlo, G., Bazilevskaya, R. h., Bellotti, A. i., Bianco, E., Bogomolov, S. l., M, A. h., Bruno, M. l., De, C. D., Santi, N. D., Simone, V. D., Felice, V. i., Formato, A., Galper, G. i., Jerse, A., Karelin, M., Kheymit, S., Koldashov, S., Krutkov, A., Kvashnin, M. p., Martucci, A., Mayorov, V., Mikhailov, E., Mocchiutti, A. h., Monaco, R. i. n, N. k. l, Osteria, Giuseppe, F. l., Palma, P. l., Picozza, C. r., S, S., Ricciarini, R. l., Sparvoli, P. c., Spillantini, Y., Stozhkov, A., Vacchi, S., Voronov, Y., Yurkin, and V., Zverev

Subjects
Physics, History, Analysis strategies, Dark matter, Energy ranges, Light nuclei, Magnetic spectrometers, Measurements of, Precise measurements, Propagation models, Space experiments, Time-of-flight system, COSMIC cancer database, Spectrometer, PAMELA detector, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Galaxy, Cosmic Rays, Settore FIS/04 - Fisica Nucleare e Subnucleare, Computer Science Applications, Education, law.invention, Nuclear physics, Cosmic ray measurement, Positron, Antiproton, law, Nuclear Experiment, Cosmic rays, Detectors, Experiments, Galaxies, Isotope
Abstract

Launched on the 15th of June 2006, the space experiment PAMELA is providing data showing interesting features in cosmic rays that might change our basic vision of the mechanisms of production, acceleration and propagation of cosmic rays in the galaxy. In addition, PAMELA measurements of cosmic antiproton and positron fluxes are setting strong constraints to the nature of Dark Matter. PAMELA is also testing cosmic rays acceleration and propagation models through precise measurements of light nuclei and their isotopes. The determination of fluxes and secondary-to-primary ratios is possible for nuclei up to Oxygen in the energy range 200MeV/n – 150 GeV/n. To investigate this important item, PAMELA can use measurements from three main detectors: the magnetic spectrometer, the calorimeter and the Time-of-Flight system. Analysis strategy and performance for nuclei studies using the detectors in stand-alone configuration will be discussed in this work.

Published
2013

23. Cosmic ray electron and positron spectra measured with PAMELA

Author

Alfonso Monaco, S. A. Voronov, Maria Teresa Ricci, V. Bonvicini, G. I. Vasiliev, Y. I. Stozhkov, Roberta Sparvoli, E. A. Bogomolov, P. Picozza, Per Carlson, Laura Rossetto, Giovanna Jerse, L. Consiglio, Ritabrata Sarkar, P. Spillantini, S. V. Borisov, V. V. Malakhov, C. Pizzolotto, V. Di Felice, S. Bottai, Mark Pearce, S. B. Ricciarini, V. Malvezzi, V. G. Zverev, Lorenzo Bonechi, R. Carbone, C. De Santis, M. P. De Pascale, S. Yu. Krutkov, G. C. Barbarino, F. Cafagna, L. Marcelli, A. Vacchi, A. G. Mayorov, G. Zampa, D. Campana, N. De Simone, P. Papini, A. Bruno, Marco Casolino, E. Vannuccini, V. V. Mikhailov, G. Castellini, Juan Wu, Y. T. Yurkin, A. V. Karelin, Giuseppe Osteria, F. Palma, M. Simon, A. A. Leonov, M. Bongi, N. Zampa, G. A. Bazilevskaya, Roberto Bellotti, A. M. Galper, A. N. Kvashnin, O. Adriani, W. Menn, S. A. Koldobsky, Mirko Boezio, Nicola Mori, S. V. Koldashov, E. Mocchiutti, V., Mikhailov, O., Adriani, Barbarino, Giancarlo, G., Bazilevskaya, R., Bellotti, M., Boezio, E., Bogomolov, L., Bonechi, M., Bongi, V., Bonvicini, S., Borisov, S., Bottai, A., Bruno, F., Cafagna, D., Campana, R., Carbone, P., Carlson, M., Casolino, G., Castellini, Consiglio, Lucia, M. m., De, C. D., Santi, N. D., Simone, V. D., Felice, A., Galper, G., Jerse, A., Karelin, S., Koldashov, S., Koldobsky, S. Y., Krutkov, A., Kvashnin, A., Leonov, V., Malakhov, V., Malvezzi, L., Marcelli, A., Mayorov, W., Menn, E., Mocchiutti, A., Monaco, N., Mori, Osteria, Giuseppe, P., Papini, F. m., Palma, M., Pearce, P. m., Picozza, C., Pizzolotto, M., Ricci, S., Ricciarini, L., Rossetto, R., Sarkar, M., Simon, R. m., Sparvoli, P., Spillantini, Y., Stozhkov, A., Vacchi, E., Vannuccini, G., Vasiliev, S., Voronov, J., Wu, Y., Yurkin, G., Zampa, N., Zampa, and V., Zverev

Subjects
Physics, History, Antiparticle, PAMELA detector, Spectrometer, Astrophysics::High Energy Astrophysical Phenomena, Polar orbit, Cosmic ray, Astrophysics, Electrons, Positrons, Tungsten, Particle detector, Cosmic ray electrons, Electromagnetic calorimeter, Magnetic spectrometers, Polar orbit, Propagation models, Wide energy range, Settore FIS/04 - Fisica Nucleare e Subnucleare, Computer Science Applications, Education, law.invention, Nuclear physics, Physics and Astronomy (all), Positron, law, Antimatter, Cosmic rays
Abstract

The PAMELA experiment is carried out on board of the satellite Resurs DK1 launched on June 15th 2006 on polar orbit (the inclination is 70, the altitude is 350-600 km). The instrument which consists of magnetic spectrometer, silicon-tungsten imaging electromagnetic calorimeter gives a possibility to measure electron and positron fluxes over wide energy range from hundreds MeVs to hundreds GeVs. Measurements made in June 2006- January 2010 are presented and compared with other results and models. Positron spectrum appears to be harder than standard diffusive propagation models predict.

Published
2013

24. Search for cosmic ray electron-positron anisotropies with the Pamela data

Author

Riccardo Munini, S. Y. Krutkov, A. V. Karelin, G. Osteria, D. Campana, V. Malvezzi, Marco Casolino, A. Bianco, Alfonso Monaco, A. M. Galper, V. G. Zverev, M. P. De Pascale, Mark Pearce, S. B. Ricciarini, S. V. Koldashov, P. Picozza, P. Papini, E. Vannuccini, Roberta Sparvoli, L. Marcelli, A. Bruno, Y. T. Yurkin, Roberto Bellotti, A. N. Kvashnin, Maria Teresa Ricci, P. Spillantini, V. Di Felice, F. Cafagna, V. Bonvicini, Y. I. Stozhkov, Matteo Martucci, Lorenzo Bonechi, Juan Wu, M. Simon, A. A. Leonov, F. Palma, E. Mocchiutti, V. V. Malakhov, Ugo Giaccari, C. De Santis, S. Bottai, M. D. Kheymits, N. Zampa, C. Pizzolotto, G. A. Bazilevskaya, V. V. Mikhailov, N. N. Nikonov, Andrea Vacchi, Mirko Boezio, Giovanna Jerse, A. G. Mayorov, M. Bongi, R. Carbone, G. C. Barbarino, G. Zampa, L. A. Grishantseva, O. Adriani, W. Menn, G. I. Vasilyev, Nicola Mori, S. V. Borisov, S. A. Voronov, E. A. Bogomolov, Laura Rossetto, Ritabrata Sarkar, Valerio Formato, G. Castellini, Per Carlson, N. De Simone, D., Campana, U., Giaccari, O. c., Adriani, Barbarino, Giancarlo, G., Bazilevskaya, R. g., Bellotti, A. i., Bianco, M., Boezio, E., Bogomolov, L., Bonechi, M., Bongi, V., Bonvicini, S. l., M, S., Bottai, A. g., Bruno, F., Cafagna, R., Carbone, P., Carlson, M., Casolino, G., Castellini, M. l., De, C. D., Santi, N. D., Simone, V. D., Felice, V. i., Formato, A., Galper, L., Grishantseva, G. i., Jerse, A., Karelin, M., Kheymit, S., Koldashov, S., Krutkov, A., Kvashnin, A., Leonov, V., Malakhov, V., Malvezzi, L., Marcelli, M. p., Martucci, A., Mayorov, W., Menn, V., Mikhailov, E., Mocchiutti, A. g., Monaco, N., Mori, R. i. n, N. k. l, Osteria, Giuseppe, F. l., Palma, P., Papini, M., Pearce, P. l., Picozza, C. r., S, M., Ricci, S., Ricciarini, L., Rossetto, R., Sarkar, M., Simon, R. l., Sparvoli, P. c., Spillantini, Y., Stozhkov, A., Vacchi, E., Vannuccini, G., Vasilyev, S., Voronov, J., Wu, Y., Yurkin, G., Zampa, N., Zampa, V., Zverev, A D Erlykin, R P Kokoulin, A S Lidvansky, L I Meroshnichenko, M I Panasyuk, A D Panov and A W Wolfendale, O., Adriani, G. C., Barbarino, G. A., Bazilevskaya, R., Bellotti, A., Bianco, E. A., Bogomolov, S., Borisov, A., Bruno, M. P., De Pascale, C., De Santi, N., De Simone, V., Di Felice, Formato, Valerio, A. M., Galper, Jerse, Giovanna, A. V., Karelin, M. D., Kheymit, S. V., Koldashov, S. Y., Krutkov, A. N., Kvashnin, M., Martucci, A. G., Mayorov, V. V., Mikhailov, Mocchiutti, Emiliano, A., Monaco, Munini, Riccardo, N., Nikonov, G., Osteria, F., Palma, P., Picozza, C., Pizzolotto, S. B., Ricciarini, R., Sparvoli, P., Spillantini, Y. I., Stozhkov, Vacchi, Andrea, S. A., Voronov, Y. T., Yurkin, and V. G., Zverev

Subjects
Physics, History, Angular distribution, Anisotropy, Positron, PAMELA detector, Astrophysics::High Energy Astrophysical Phenomena, Isotropy, Flux, Cosmic ray, Electron, Astrophysics, Cosmic Rays, Settore FIS/04 - Fisica Nucleare e Subnucleare, Computer Science Applications, Education, law.invention, Angular scale, Arrival direction, Cosmic ray electrons, Directional Analysis, Strong anisotropy, Nuclear physics, Positron, law, Anisotropy, Directional analysis
Abstract

Using data taken by the Pamela experiment during 5 years of operation we studied the anisotropy in the arrival direction of cosmic ray electrons and positrons with energy above 40 GeV. We report on a study of anisotropy in the e�� flux at different angular scales extending from 30��up to 90��, furthermore a directional analysis has been performed around the Sun direction. The observed distribution of arrival directions is consistent with the isotropic expectation at any angular scale used in this study and no significant evidence of strong anisotropies has been observed, also the analysis around the Sun direction did not show any significant excess.

Published
2013

25. Galactic deuteron spectrum measured in PAMELA experiment

Author

Maria Teresa Ricci, S. V. Borisov, Roberta Sparvoli, A. G. Mayorov, Mark Pearce, S. B. Ricciarini, Juan Wu, Y V Mikhailov, P. Papini, E. Vannuccini, S. Y. Krutkov, S. A. Voronov, Per Carlson, Y. T. Yurkin, Mirko Boezio, Alfonso Monaco, E. A. Bogomolov, L. Consiglio, N. Zampa, Roberto Bellotti, Ritabrata Sarkar, Nicola Mori, Laura Rossetto, C. Pizzolotto, G. A. Bazilevskaya, N. N. Nikonov, V. G. Zverev, M. Simon, Giovanna Jerse, N. De Simone, William Gillard, M. Bongi, A. A. Leonov, M. D. Kheymits, R. Carbone, C. De Santis, V. Bonvicini, A. N. Kvashnin, Lorenzo Bonechi, A. V. Karelin, V. V. Malakhov, A. M. Galper, G. Castellini, S. V. Koldashov, D. Campana, G. Zampa, Y. I. Stozhkov, G. Osteria, L. Marcelli, Marco Casolino, A. Vacchi, Sergey Koldobskiy, G. C. Barbarino, P. Picozza, P. Spillantini, M. P. De Pascale, S. Bottai, F. Cafagna, O. Adriani, F. Palma, A. Bruno, E. Mocchiutti, W. Menn, G. I. Vasilyev, V. Di Felice, S., Koldobskiy, O. b., Adriani, Barbarino, Giancarlo, G., Bazilevskaya, R. g., Bellotti, M., Boezio, E., Bogomolov, L. b., Bonechi, M., Bongi, V., Bonvicini, S. k., L., S., Bottai, A. g., Bruno, F., Cafagna, D., Campana, R. k., Carbone, P., Carlson, M. r., Casolino, G., Castellini, Consiglio, Lucia, M. k., De, C. k., De, N. k., De, V. D., Felice, A., Galper, W., Gillard, G. o., Jerse, A., Karelin, M., Kheymit, S., Koldashov, S., Krutkov, A., Kvashnin, A., Leonov, V., Malakhov, L., Marcelli, A., Mayorov, W., Menn, Y., Mikhailov, E., Mocchiutti, A., Monaco, N. b., Mori, N. j., K., Osteria, Giuseppe, F. k., Palma, P., Papini, M., Pearce, P. k., Picozza, C., Pizzolotto, M., Ricci, S., Ricciarini, R., Sarkar, L., Rossetto, M., Simon, R. k., Sparvoli, P. b., Spillantini, Y., Stozhkov, A., Vacchi, E., Vannuccini, G., Vasilyev, S., Voronov, J., Wu, Y., Yurkin, G., Zampa, N., Zampa, and V., Zverev

Subjects
Physics, Spectrum measurement, Wide energy range, History, Range (particle radiation), Astrophysics::High Energy Astrophysical Phenomena, Nuclear Theory, Spectrum (functional analysis), Cosmic rays, Deuterium, Experiment, Nuclear physics, Astrophysics::Cosmology and Extragalactic Astrophysics, Electron, Spectral line, Computer Science Applications, Education, Settore FIS/04 - Fisica Nucleare e Subnucleare, Physics and Astronomy (all), Positron, Deuterium, Antimatter, Nuclear Experiment
Abstract

Results of galactic deuteron spectrum measurement by means of PAMELA apparatus are described. PAMELA is an international experiment developed for antimatter search and measurement of p,He, electron and positron spectra in wide energy range. In addition, PAMELA allows to identify and measure deuteron spectrum at low energies. In this paper deuteron-to-proton ratio and deuteron spectrum are presented.

Published
2013

26. Measurement of antiproton flux in primary cosmic radiation with PAMELA experiment

Author

S. Bottai, C. Pizzolotto, S. V. Borisov, S. A. Voronov, Sergey Koldobskiy, D. Campana, Roberto Bellotti, G. C. Barbarino, S. Y. Krutkov, V. G. Zverev, Marco Casolino, G. Castellini, E. A. Bogomolov, A. N. Kvashnin, E. Mocchiutti, Roberta Sparvoli, Laura Rossetto, V. Di Felice, M. Simon, Mark Pearce, S. B. Ricciarini, N. Zampa, G. A. Bazilevskaya, Alfonso Monaco, P. Picozza, A. A. Leonov, N. N. Nikonov, Ritabrata Sarkar, O. Adriani, P. Spillantini, P. Papini, R. Carbone, Lorenzo Bonechi, V. V. Malakhov, W. Menn, Per Carlson, E. Vannuccini, Giovanna Jerse, V. V. Mikhailov, N. De Simone, M. Bongi, S. V. Koldashov, V. Bonvicini, Y. I. Stozhkov, Maria Teresa Ricci, M. P. De Pascale, Y. T. Yurkin, A. V. Karelin, F. Cafagna, G. Osteria, A. G. Mayorov, L. Consiglio, William Gillard, A. M. Galper, L. Marcelli, A. Vacchi, M. D. Kheymits, A. Bruno, G. Zampa, G. I. Vasilyev, Juan Wu, Nicola Mori, C. De Santis, F. Palma, Mirko Boezio, A., Mayorov, O. b., Adriani, G, Barbarino, Giancarlo, Bazilevskaya, R. g., Bellotti, M., Boezio, E., Bogomolov, L. b., Bonechi, M., Bongi, V., Bonvicini, S. k., L., S., Bottai, A. g., Bruno, F., Cafagna, D., Campana, R. k., Carbone, P., Carlson, M. r., Casolino, G., Castellini, L., Consiglio, M. k., De, C. k., De, N. k., De, V. D., Felice, A., Galper, W., Gillard, G. o., Jerse, A., Karelin, M., Kheymit, S., Koldashov, S., Koldobskiy, S., Krutkov, A., Kvashnin, A., Leonov, V., Malakhov, L., Marcelli, W., Menn, V., Mikhailov, E., Mocchiutti, A., Monaco, N. b., Mori, N. j., K., Osteria, Giuseppe, F. k., Palma, P., Papini, M., Pearce, P. k., Picozza, C., Pizzolotto, M., Ricci, S., Ricciarini, R., Sarkar, L., Rossetto, M., Simon, R. k., Sparvoli, P. b., Spillantini, Y., Stozhkov, A., Vacchi, E., Vannuccini, G., Vasilyev, S., Voronov, J., Wu, Y., Yurkin, G., Zampa, N., Zampa, and V., Zverev

Subjects
Physics, History, Antiparticle, Experiments, Intelligent systems, Proton, Calorimeter (particle physics), PAMELA detector, Astrophysics::High Energy Astrophysical Phenomena, Antiproton flux, Classification algorithm, Energy ranges, Galactic cosmic radiations, Monte Carlo Simulation, Training sample, Cosmic ray, Particle detector, Particle identification, Settore FIS/04 - Fisica Nucleare e Subnucleare, Computer Science Applications, Education, law.invention, Nuclear physics, Physics and Astronomy (all), law, Antiproton, Antimatter, Nuclear Experiment, Cosmic rays
Abstract

The new method based on the classification algorithms was developed to separate antiprotons and electrons in the PAMELA experiment. Training samples based on Monte-Carlo simulation of particle's interactions in the PAMELA imaging Si/W calorimeter were used to achieve rejection factor and to keep high antiproton efficiency. With comparison to the previous publication the number of events was increased 1.5 times. Information collected from the mission start in 2006 till January 2010 was used in the analysis. 2800 events were found in the energy range from 60 MeV to 350 GeV. The flux of antiprotons in galactic cosmic radiation obtained with new method is presented.

Published
2013

27. Cosmic ray study with the PAMELA experiment

Author

N. De Simone, P. Spillantini, M. D. Kheymits, Nicola Mori, S. Bottai, Alfonso Monaco, Giovanna Jerse, A. G. Mayorov, Roberto Bellotti, G. Zampa, Mark Pearce, S. B. Ricciarini, A. M. Galper, R. Carbone, S. A. Voronov, P. Papini, E. Vannuccini, O. Adriani, D. Campana, W. Menn, G. C. Barbarino, A. N. Kvashnin, V. V. Malakhov, E. A. Bogomolov, A. V. Karelin, L. Marcelli, A. Vacchi, A. Bruno, S. V. Borisov, G. I. Vasilyev, S. Y. Krutkov, C. Pizzolotto, F. Palma, E. Mocchiutti, Laura Rossetto, M. Bongi, N. N. Nikonov, Roberta Sparvoli, Marco Casolino, V. V. Mikhailov, P. Carlson, G. Osteria, Juan Wu, C. De Santis, S. V. Koldashov, V. Di Felice, V. Bonvicini, G. Castellini, Y. I. Stozhkov, L. A. Grishantseva, Mirko Boezio, F. Cafagna, M. P. De Pascale, Y. T. Yurkin, P. Picozza, Ritabrata Sarkar, V. G. Zverev, N. Zampa, G. A. Bazilevskaya, Maria Teresa Ricci, M. Simon, A. A. Leonov, P. b., Picozza, L., Marcelli, O. d., Adriani, Barbarino, Giancarlo, G., Bazilevskaya, R. i., Bellotti, M., Boezio, E., Bogomolov, M., Bongi, V., Bonvicini, S. b., L, S., Bottai, A. i., Bruno, F., Cafagna, D., Campana, R., Carbone, P., Carlson, M. b., N, G., Castellini, M. b., De, C. b., De, N. D., Simone, V. D., Felice, A., Galper, L., Grishantseva, G. q., Jerse, A., Karelin, M., Kheymit, S., Koldashov, S., Krutkov, A., Kvashnin, A., Leonov, V., Malakhov, A., Mayorov, W., Menn, V., Mikhailov, E., Mocchiutti, A. i., Monaco, N., Mori, N. b., K, Osteria, Giuseppe, F. b., Palma, P., Papini, M., Pearce, C., Pizzolotto, M., Ricci, S., Ricciarini, R., Sarkar, L., Rossetto, M., Simon, R. b., Sparvoli, P. d., Spillantini, Y., Stozhkov, A., Vacchi, E., Vannuccini, G., Vasilyev, S., Voronov, Y., Yurkin, J., Wu, G., Zampa, N., Zampa, and V., Zverev

Subjects
History, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Settore FIS/04 - Fisica Nucleare e Subnucleare, Education, law.invention, symbols.namesake, Physics and Astronomy (all), Positron, law, Experiments, Galaxies, Protons, Radiation belts, Solar energy, Cosmic rays, Physics, COSMIC cancer database, PAMELA detector, Astronomy, Computer Science Applications, Dark matter, Data collection, Heliospheres, Measurements of, Particle detection, Radiation environments, Solar activity, Solar modulation, Antiproton, Van Allen radiation belt, Physics::Space Physics, symbols, Heliosphere
Abstract

In six years of data collection years in space, the experiment PAMELA has discovered very interesting features in cosmic rays, namely in the fluxes of protons, helium, electrons, that might change our basic vision of the mechanisms of production, acceleration and propagation of cosmic rays in the Galaxy. In addition, PAMELA measurements of cosmic antiproton and positron fluxes are setting strong constraints to the nature of Dark Matter. The continuous particle detection is allowing a constant monitoring of the solar activity and detailed study of the solar modulation for a long period, giving important improvements to the comprehension of the heliosphere mechanisms. PAMELA is also measuring the radiation environment around the Earth, and has recently discovered an antiproton radiation belt.

Published
2013

28. The PAMELA space experiment

Author

Yu. T. Yurkin, N. Zampa, G. A. Bazilevskaya, V. Bonvicini, R. Carbone, G. I. Vasilyev, V. Malvezzi, Y. I. Stozhkov, Juan Wu, M. Bongi, Giancarlo Barbarino, V. V. Malakhov, M. Simon, Mark Pearce, S. B. Ricciarini, N. De Simone, V. Di Felice, C. Pizzolotto, F. Cafagna, P. Papini, Piero Spillantini, G. Zampa, E. Vannuccini, S. V. Borisov, Marco Ricci, V. G. Zverev, J. C. Stockton, G. Osteria, A. G. Mayorov, Andrea Vacchi, S. Y. Krutkov, G. Castellini, Nicola Mori, V. V. Mikhailov, L. Consiglio, A. V. Karelin, Roberta Sparvoli, O. Adriani, Alexey Leonov, C. De Santis, F. Palma, E. Mocchiutti, W. Menn, S. Bottai, M. P. De Pascale, P. Picozza, Alfonso Monaco, Per Carlson, Mirko Boezio, S. J. Stochaj, N. N. Nikonov, Roberto Bellotti, A. M. Galper, A. N. Kvashnin, S. A. Voronov, E. A. Bogomolov, Laura Rossetto, Giovanna Jerse, L. A. Grishantseva, Sergey Koldashov, Lorenzo Bonechi, D. Campana, Marco Casolino, Ritabrata Sarkar, William Gillard, L. Marcelli, A. Bruno, W., Menn, O., Adriani, Barbarino, Giancarlo, G., Bazilevskaya, R., Bellotti, M., Boezio, E., Bogomolov, L., Bonechi, M., Bongi, V., Bonvicini, S., Borisov, S., Bottai, A., Bruno, F., Cafagna, D., Campana, R., Carbone, P., Carlson, M., Casolino, G., Castellini, Consiglio, Lucia, M. D., Pascale, C. D., Santi, N. D., Simone, V. D., Felice, A., Galper, W., Gillard, L., Grishantseva, G., Jerse, A., Karelin, S., Koldashov, S., Krutkov, A., Kvashnin, A., Leonov, V., Malakhov, V., Malvezzi, L., Marcelli, A., Mayorov, V., Mikhailov, E., Mocchiutti, A., Monaco, N., Mori, N., Nikonov, Osteria, Giuseppe, F., Palma, P., Papini, M., Pearce, P., Picozza, C., Pizzolotto, M., Ricci, S., Ricciarini, R., Sarkar, L., Rossetto, M., Simon, R., Sparvoli, P., Spillantini, S., Stochaj, J., Stockton, Y., Stozhkov, A., Vacchi, E., Vannuccini, G., Vasilyev, S., Voronov, J., Wu, Y., Yurkin, G., Zampa, N., Zampa, and V., Zverev

Subjects
Physics, Atmospheric Science, Antimatter, Cosmic rays, Satellite-borne experiment, Aerospace Engineering, Space and Planetary Science, PAMELA detector, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Astronomy and Astrophysics, Cosmic ray, Settore FIS/04 - Fisica Nucleare e Subnucleare, law.invention, Nuclear physics, Space experiment, Geophysics, law, General Earth and Planetary Sciences
Abstract

On 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 is comprised of 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 to 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 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. After 4 years of operation in flight, PAMELA is now delivering coherent results about spectra and chemical composition of the charged cosmic radiation, allowing scenarios of production and propagation of cosmic rays to be fully established and understood. © 2011 COSPAR. Published by Elsevier Ltd. All rights reserved.

Published
2013
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29. The cosmic-ray electron flux measured by the PAMELA experiment between 1 and 625 GeV

Author

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

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Spectral index, genetic structures, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, General Physics and Astronomy, FOS: Physical sciences, Cosmic ray, Astrophysics, Electron, Astrophysics::Cosmology and Extragalactic Astrophysics, 7. Clean energy, 01 natural sciences, Galaxy, Settore FIS/04 - Fisica Nucleare e Subnucleare, Solar wind, Positron, Electron flux, 0103 physical sciences, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics
Abstract

Precision measurements of the electron component in the cosmic radiation provide important information about the origin and propagation of cosmic rays in the Galaxy. Here we present new results regarding negatively charged electrons between 1 and 625 GeV performed by the satellite-borne experiment PAMELA. This is the first time that cosmic-ray electrons have been identified above 50 GeV. The electron spectrum can be described with a single power law energy dependence with spectral index -3.18 +- 0.05 above the energy region influenced by the solar wind (> 30 GeV). No significant spectral features are observed and the data can be interpreted in terms of conventional diffusive propagation models. However, the data are also consistent with models including new cosmic-ray sources that could explain the rise in the positron fraction., 11 pages, 3 figures, accepted for publication in PRL

Published
2011

30. Capability of the PAMELA Time-Of-Flight to identify light nuclei: results from a beam test calibration

Author

V. Malvezzi, L. Marcelli, G. De Rosa, R. Carbone, Lorenzo Bonechi, D. Campana, W. Menn, G. Osteria, M. Bongi, Roberta Sparvoli, P. Picozza, S. B. Ricciarini, E. Vannuccini, S. Russo, D., Campana, R., Carbone, DE ROSA, Gianfranca, G., Osteria, S., Russo, W., Menn, V., Malvezzi, L., Marcelli, P., Picozza, R., Sparvoli, L., Bonechi, M., Bongi, S., Ricciarini, and E., Vannuccini

Subjects
Ionizing radiation, Nuclear and High Energy Physics, Neutron detectors, Luminescence, Satellite-borne experiment, Astrophysics::High Energy Astrophysical Phenomena, Discrimination capabilities, Light nucleuses, FOS: Physical sciences, Cosmic ray, Particle detectors, Wide energy ranges, Astrophysics, Light emission, Negative ions, law.invention, Settore FIS/04 - Fisica Nucleare e Subnucleare, Positron, Spitzer Space Telescope, Flight systems, law, Calibration, Cosmic rays, Hydrogen, Oxygen, Satellite observatories, Scintillation, Scintillation counters, Spacecraft observatories, Abundances, Anti-protons, Beam tests, Scientific objectives, Scintillation detectors, Cosmology, Nuclear Experiment, Instrumentation, Physics, PAMELA detector, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Time of flight, Antiproton, Astrophysics::Earth and Planetary Astrophysics, Beam (structure)
Abstract

PAMELA is a space telescope orbiting around the Earth since June 2006. The scientific objectives addressed by the mission are the measurement of the antiprotons and positrons spectra in cosmic rays, the hunt for anti-nuclei as well as the determination of light nuclei fluxes from Hydrogen to Oxygen in a wide energy range and with very high statistics. In this paper the charge discrimination capabilities of the PAMELA Time-Of-Flight system for light nuclei, determined during a beam test calibration, will be presented., 17 pages, 9 figures, accepted for pubblication in NIMA

Published
2008

31. A search algorithm for finding Cosmic-Ray anisotropy with the PAMELA calorimeter

Author

S. V. Koldashov, S. Y. Krutkov, Maria Teresa Ricci, E. Mocchiutti, S. V. Borisov, S. Bottai, V. Bonvicini, V. V. Malakhov, L. Consiglio, P. Picozza, Y. I. Stozhkov, Ritabrata Sarkar, P. Spillantini, M. D. Kheymits, R. Carbone, Lorenzo Bonechi, Giovanna Jerse, C. Pizzolotto, G. Zampa, Roberta Sparvoli, S. A. Voronov, D. Campana, G. Castellini, Per Carlson, Alfonso Monaco, E. A. Bogomolov, Marco Casolino, V. Di Felice, Sergey Koldobskiy, G. C. Barbarino, M. P. De Pascale, A. V. Karelin, Laura Rossetto, N. N. Nikonov, V. G. Zverev, G. Osteria, William Gillard, L. Marcelli, Y. T. Yurkin, A. Vacchi, A. Bruno, N. De Simone, Roberto Bellotti, N. Zampa, G. A. Bazilevskaya, Mirko Boezio, A. N. Kvashnin, A. M. Galper, Juan Wu, A. G. Mayorov, F. Cafagna, Mark Pearce, S. B. Ricciarini, P. Papini, E. Vannuccini, V. V. Mikhailov, C. De Santis, F. Palma, Nicola Mori, M. Simon, A. A. Leonov, O. Adriani, W. Menn, G. I. Vasilyev, M. Bongi, A., Karelin, O. b., Adriani, Barbarino, Giancarlo, G., Bazilevskaya, R. g., Bellotti, M., Boezio, E., Bogomolov, L. b., Bonechi, M., Bongi, V., Bonvicini, S. k., L, S., Bottai, A. g., Bruno, F., Cafagna, D., Campana, R. k., Carbone, P., Carlson, M. r., Casolino, G., Castellini, Consiglio, Lucia, M. k., De, C. k., De, N. k., De, V. D., Felice, A., Galper, W., Gillard, G. o., Jerse, M., Kheymit, S., Koldashov, S., Koldobskiy, S., Krutkov, A., Kvashnin, A., Leonov, A., Mayorov, V., Malakhov, L., Marcelli, W., Menn, V., Mikhailov, E., Mocchiutti, A., Monaco, N. b., Mori, N. j., K, Osteria, Giuseppe, F. k., Palma, P., Papini, M., Pearce, P. k., Picozza, C., Pizzolotto, M., Ricci, S., Ricciarini, R., Sarkar, L., Rossetto, M., Simon, R. k., Sparvoli, P. b., Spillantini, Y., Stozhkov, A., Vacchi, E., Vannuccini, G., Vasilyev, S., Voronov, J., Wu, Y., Yurkin, G., Zampa, N., Zampa, and V., Zverev

Subjects
Physics, History, Range (particle radiation), Spectrometer, Calorimeter (particle physics), Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Cosmic ray, Particle identification, Particle detector, Settore FIS/04 - Fisica Nucleare e Subnucleare, Computer Science Applications, Education, Nuclear physics, Physics and Astronomy (all), Particle shower, High Energy Physics::Experiment, Satellite, Anisotropy, Calorimeters, Cosmic ray measurement, Cosmic rays, Cosmic ray energies, Energy ranges, In-orbit, Measurements of, Near-earth spaces, Search Algorithms, Secondary particles, Wide energy range
Abstract

The PAMELA project is the satellite experiment for measurements of the cosmic ray energy spectra in a wide energy range in near-Earth space. The PAMELA apparatus is in orbit from 2006 till today. The calorimeter is the main part of the instrument. It is able to measure energy, to distinguish between hadrons and electrons and to reconstruct the arriving particle direction. Using of special triggers for the calorimeter allows significant increasing of statistics. In consideration of these facts the technique of anisotropy searching in the energy range extending higher than 10 GeV has been developed. This technique is based on the calorimeter data and has as content the advanced method of the reconstruction of the secondary particle shower axis in the calorimeter.

Published
2013

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

Author

Petter Hofverberg, L. A. Grishantseva, V. V. Mikhailov, Y. T. Yurkin, Andrea Vacchi, Gianfranca De Rosa, V. Bonvicini, Valeria Di Felice, Piero Spillantini, Nicola de Simone, A. N. Kvashnin, S. A. Voronov, Elena Taddei, V. G. Zverev, E. A. Bogomolov, D. Campana, S. Bottai, M. Ricci, Marco Casolino, R. Carbone, Maria Pia De Pascale, Roberta Sparvoli, L. Marcelli, N. N. Nikonov, Paolo Papini, Massimo Bongi, O. Adriani, M. Minori, N. Zampa, G. A. Bazilevskaya, O. Maksumov, Per Carlson, W. Menn, Daniel Bongue, F. Cafagna, Sergey Koldashov, Mark Pearce, S. B. Ricciarini, E. Mocchiutti, S. Yu. Krutkov, E. Vannuccini, M. Simon, Yuri Stozhkov, Lorenzo Bonechi, G. Castellini, Giancarlo Barbarino, Alexey Leonov, Giuseppe Osteria, A. M. Galper, Gianluigi Zampa, G. I. Vasilyev, Piergiorgio Picozza, A. Bruno, Mirko Boezio, M., Casolino, N. D., Simone, D., Bongue, M. D., Pascale, V., Felice, L., Marcelli, M., Minori, P., Picozza, R., Sparvoli, G., Castellini, O., Adriani, L., Bonechi, M., Bongi, S., Bottai, P., Papini, S., Ricciarini, P., Spillantini, E., Taddei, E., Vannuccini, Barbarino, Giancarlo, D., Campana, R., Carbone, DE ROSA, Gianfranca, G., Osteria, M., Boezio, V., Bonvicini, E., Mocchiutti, A., Vacchi, G., Zampa, N., Zampa, A., Bruno, F., Cafagna, M., Ricci, P., Hofverberg, M., Pearce, P., Carlson, E., Bogomolov, S., Krutkov, N., Nikonov, Givasilyev, W., Menn, M., Simon, A., Galper, L., Grishantseva, S., Koldashov, A., Leonov, V., Mikhailov, S., Voronov, Y., Yurkin, V., Zverev, G., Bazilevskaya, A., Kvashnin, O., Maksumov, and Y., Stozhkov

Subjects
Antimatter, Solar particle events, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, FOS: Physical sciences, General Physics and Astronomy, Cosmic ray, Astrophysics, law.invention, Physics and Astronomy (all), Positron, law, Nuclear Experiment, Cosmic rays, Physics, PAMELA detector, Astrophysics (astro-ph), Astronomy, Trapped cosmic rays, Antiproton, Solar particle event, Physics::Accelerator Physics, Satellite
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, $15^{th}$ 2006 in a $350\times 600 km$ 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 $13^{th}$ 2006 Solar Particle Event - are also provided., Comment: To appear on J. Phys. Soc. Jpn. as part of the proceedings of the International Workshop on Advances in Cosmic Ray Science March, 17-19, 2008 Waseda University, Shinjuku, Tokyo, Japan

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