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21 results on '"Bonechi, S"'

1. CALET on the International Space Station: The first three years of observations

Author

Brogi, P, Adriani, O, Akaike, Y, Asano, K, Asaoka, Y, Bagliesi, Mg, Berti, E, Bigongiari, G, Binns, Wr, Bonechi, S, Bongi, M, Bruno, A, Buckley, Jh, Cannady, N, Castellini, G, Checchia, C, Cherry, Ml, Collazuol, G, Di Felice, V, Ebisawa, K, Fuke, H, Guzik, Tg, Hams, T, Hibino, K, Ichimura, M, Ioka, K, Ishizaki, W, Israel, Mh, Kasahara, K, Kataoka, J, Kataoka, R, Katayose, Y, Kato, C, Kawanaka, N, Kawakubo, Y, Kohri, K, Krawczynski, Hs, Krizmanic, Jf, Link, J, Maestro, P, Marrocchesi, Ps, Messineo, Am, Mitchell, Jw, Miyake, S, Moiseev, Aa, Mori, M, Mori, N, Motz, Hm, Munakata, K, Murakami, H, Nakahira, S, Nishimura, J, De Nolfo, Ga, Okuno, S, Ormes, Jf, Ospina, N, Ozawa, S, Pacini, L, Palma, F, Papini, P, Rauch, Bf, Ricciarini, Sb, Sakai, K, Sakamoto, T, Sasaki, M, Shimizu, Y, Shiomi, A, Sparvoli, R, Spillantini, P, Stolzi, F, Sugita, S, Suh, Je, Sulaj, A, Takahashi, I, Takita, M, Tamura, T, Terasawa, T, Torii, S, Tsunesada, Y, Uchihori, Y, Vannuccini, E, Wefel, Jp, Yamaoka, K, Yanagita, S, Yoshida, A, and Yoshida, K

Subjects
Physics, electron, Spectrometer, DARK MATTER, Settore FIS/04, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astronomy, Cosmic ray, CALET, Electron, Condensed Matter Physics, Electromagnetic radiation, Atomic and Molecular Physics, and Optics, Spectral line, ANTIPROTONS, gamma rays, Cosmic rays, nuclei, International Space Station, Measuring instrument, Mathematical Physics
Abstract

The CALorimetric Electron Telescope CALET is a space instrument designed to carry out precision measurements of high energy cosmic-rays on the JEM-EF external platform on the International Space Station, where it has been collecting science data continuously since mid October 2015. In addition to its primary goal of identifying nearby sources of high-energy electrons and possible signatures of dark matter in the electron spectrum, CALET is carrying out extensive measurements of the energy spectra, relative abundances and secondary-to-primary ratios of elements from proton to iron, and even above (up to Z = 40), studying the details of galactic particle propagation and acceleration. An overview of CALET based on the data taken during the first three years of observations is presented, including a direct measurement of the electron+positron energy spectrum from 11 GeV to 4.8 TeV. The proton spectrum has been measured from 50 GeV to 10 TeV covering, for the first time with a single space-borne instrument, the whole energy interval previously investigated in separate sub-ranges by magnetic spectrometers and calorimetric instruments. Preliminary spectra of cosmic-ray nuclei are also presented, together with gamma-ray observations and searches for an e.m. counterpart of LIGO/Virgo GW events.

Published
2020

2. Energy Spectrum of Cosmic-Ray Electron and Positron from 10 GeV to 3 TeV Observed with the Calorimetric Electron Telescope on the International Space Station

Author

CALET, Collaboration, Adriani, O., Asano, K., Bagliesi, M. G., Bigongiari, G., Binns, W. R., Bonechi, S., Bongi, M., Brogi, P., Buckley, J. H., Cannady, N., Castellini, G., Checchia, C., Cherry, M. L., Collazuol, G., Di, Felice V., Guzik, T. G., Hams, T., Ioka, K., Ishizaki, W., Israel, M. H., Javaid, A., Kataoka, R., Kato, C., Kawanaka, N., Kawakubo, Y., Krawczynski, H. S., Krizmanic, J. F., Lomtadze, T., Maestro, P., Marrocchesi, P. S., Messineo, A. M., Mitchell, J. W., Miyake, S., Moiseev, A. A., Mori, M., Mori, N., Motz, H. M., Munakata, K., de, Nolfo G. A., Ormes, J. F., Ozawa, Shunsuke, Pacini, L., Palma, F., Papini, P., Penacchioni, A. V., Rauch, B. F., Ricciarini, S. B., Sakai, K., Sakamoto, T., Sasaki, M., Shimizu, Yuki, Shiomi, A., Sparvoli, R., Spillantini, P., Stolzi, F., Takahashi, I., Takita, M., Tsunesada, Y., Vannuccini, E., Wefel, J. P., Yamaoka, K., Yanagita, S., Yoshida, A., Akaike, Yosui, Asaoka, Yoichi, Ebisawa, Ken, Fuke, Hideyuki, Hareyama, Makoto, Hasebe, Nobuyuki, Hibino, Kinya, Ichimura, Masakatsu, Kasahara, Katsuaki, Kataoka, Jun, Katayose, Yusaku, Kuramata, Shiyuuichi, Mizutani, Kouhei, Mori, Kunishiro, Murakami, Hiroyuki, Nakahira, Satoshi, Nishimura, Jun, Okuno, Shoji, Takayanagi, Masahiro, Tamura, Tadahisa, Tateyama, Nobuhito, Terasawa, Toshio, Tomida, Hiroshi, Torii, Shoji, Uchihori, Yukio, Ueno, Shiro, Yoshida, Kenji, and Yuda, Toshinori

Subjects
Particle physics, Proton, Astrophysics::High Energy Astrophysical Phenomena, General Physics and Astronomy, FOS: Physical sciences, Cosmic ray, Electrons, Electron, Calorimetry, 7. Clean energy, 01 natural sciences, law.invention, Telescope, Physics and Astronomy (all), Calorimetry, Cosmic rays, Cosmology, Electrons, Positrons, Space stations, Spectroscopy, Spectrum analysis, Tellurium compounds, Tellurium compounds, Positron, Positrons, law, 0103 physical sciences, 010306 general physics, Cosmic rays, Spectroscopy, Physics, Settore FIS/01, High Energy Astrophysical Phenomena (astro-ph.HE), Spectral index, 010308 nuclear & particles physics, Spectral density, Space stations, Spectrum analysis, Cosmology, High Energy Physics::Experiment, Astrophysics - High Energy Astrophysical Phenomena, Energy (signal processing)
Abstract

First results of a cosmic-ray electron + positron spectrum, from 10 GeV to 3 TeV, is presented based upon observations with the CALET instrument on the ISS starting in October, 2015. Nearly a half million electron + positron events are included in the analysis. CALET is an all-calorimetric instrument with total vertical thickness of 30 $X_0$ and a fine imaging capability designed to achieve a large proton rejection and excellent energy resolution well into the TeV energy region. The observed energy spectrum over 30 GeV can be fit with a single power law with a spectral index of -3.152 $\pm$ 0.016 (stat.+ syst.). Possible structure observed above 100 GeV requires further investigation with increased statistics and refined data analysis., 7 pages, 6 figures, published 1 November 2017 in Physical Review Letters

Published
2017

3. Separation of electrons and protons in the GAMMA-400 gamma-ray telescope

Author

Leonov, A. A., Galper, A. M., Bonvicini, V., Topchiev, N. P., Adriani, O., Aptekar, R. L., Arkhangelskaja, I. V., Arkhangelskiy, A. I., Bergstrom, L., Berti, E., Bigongiari, G., Bobkov, S. G., Boezio, M., Bogomolov, E. A., Bonechi, S., Bongi, M., Bottai, S., Castellini, G., Cattaneo, P. W., Cumani, P., Dedenko, G. L., De Donato, C., Dogiel, V. A., Gorbunov, M. S., Gusakov, Yu. V., Hnatyk, B. I., Kadilin, V. V., Kaplin, V. A., Kaplun, A. A., Kheymits, M. D., Korepanov, V. E., Larsson, J., Loginov, V. A., Longo, F., Maestro, P., Marrocchesi, P. S., Mikhailov, V. V., Mocchiutti, E., Moiseev, A. A., Mori, N., Moskalenko, I. V., Naumov, P. Yu., Papini, P., Pearce, M., Picozza, P., Popov, A. V., Rappoldi, A., Ricciarini, S., Runtso, M. F., Ryde, F., Serdin, O. V., Sparvoli, R., Spillantini, P., Suchkov, S. I., Tavani, M., Taraskin, A. A., Tiberio, A., Tyurin, E. M., Ulanov, M. V., Vacchi, A., Vannuccini, E., Vasilyev, G. I., Yurkin, Yu. T., Zampa, N., Zirakashvili, V. N., Zverev, V. G., Leonov, A. A, Galper, A. M., Bonvicini, V., Topchiev, N. P., Adriaini, O., Aptekar, R. L., Arkhangelskaja, I. V., Arkhangelskiy, A. I., Bergstrom, L., Berti, E., Bigongiari, G., Bobkov, S. G., Boezio, M., Bogomolov, E. A., Bonechi, S., Bongi, M., Bottai, S., Castellini, G., Cattaneo, P. W., Cumani, Paolo, Dedenko, G. L., De Donato, C., Dogiel, V. A., Gorbunov, M. S., Gusakov, Y. u. V., Hnatyk, B. I., Kadilin, V. V., Kaplin, V. A., Kaplun, A. A., Kheymits, M. D., Korepanov, V. E., Larsson, J., Loginov, V. A., Longo, Francesco, Maestro, P., Marrocchesi, P. S., Mikhailov, V. V., Mocchiutti, E., Moiseev, A. A., Mori, N., Moskalenko, I. V., Naumov, P. Y. u., Papini, P., Pearce, M., Picozza, P., Rappoldi, A., Ricciarini, S., Runtso, M. F., Ryde, F., Serdin, O. V., Sparvoli, R., Spillantini, P., Suchkov, S. I., Taraskin, A. A., Tavani, M., Tiberio, A., Tyurin, E. M., Ulanov, M. V., Vacchi, A., Vannuccini, E., Vasilyev, G. I., Yurkin, Y. u. T., Zampa, N., Zirakashvili, V. N., and Zverev, V. G.

Subjects
Space experiments, Atmospheric Science, Physics - Instrumentation and Detectors, Hadron and electromagnetic shower, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, FOS: Physical sciences, Aerospace Engineering, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Electron, law.invention, Telescope, Positron, law, Instrumentation and Methods for Astrophysics (astro-ph.IM), Cosmic rays, Physics, Range (particle radiation), Settore FIS/04, Gamma rays, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, Instrumentation and Detectors (physics.ins-det), Space experiment, Hadron and electromagnetic showers, Geophysics, Space and Planetary Science, Gamma-ray telescope, General Earth and Planetary Sciences, Physics::Accelerator Physics, High Energy Physics::Experiment, Astrophysics - Instrumentation and Methods for Astrophysics, Fermi Gamma-ray Space Telescope
Abstract

The GAMMA-400 gamma-ray telescope is intended to measure the fluxes of gamma rays and cosmic-ray electrons and positrons in the energy range from 100 MeV to several TeV. Such measurements concern with the following scientific goals: search for signatures of dark matter, investigation of gamma-ray point and extended sources, studies of the energy spectra of Galactic and extragalactic diffuse emission, studies of gamma-ray bursts and gamma-ray emission from the active Sun, as well as high-precision measurements of spectra of high-energy electrons and positrons, protons, and nuclei up to the knee. The main components of cosmic rays are protons and helium nuclei, whereas the part of lepton component in the total flux is ~10E-3 for high energies. In present paper, the capability of the GAMMA-400 gamma-ray telescope to distinguish electrons and positrons from protons in cosmic rays is investigated. The individual contribution to the proton rejection is studied for each detector system of the GAMMA-400 gamma-ray telescope. Using combined information from all detector systems allow us to provide the proton rejection from electrons with a factor of ~4x10E5 for vertical incident particles and ~3x10E5 for particles with initial inclination of 30 degrees. The calculations were performed for the electron energy range from 50 GeV to 1 TeV., Comment: 19 pages, 10 figures, submitted to Advances and Space Research

Published
2015

4. The CALorimetric Electron Telescope (CALET) on the International Space Station: Results from the First Two Years of Operation.

Author

Asaoka, Y, Adriani, O, Akaike, Y, Asano, K, Bagliesi, MG, Berti, E, Bigongiari, G, Binns, WR, Bonechi, S, Bongi, M, Bruno, A, Brogi, P, Buckley, J H, Cannady, N, Castellini, G, Checchia, C, Cherry, M L, Collazuol, G, Di Felice, V, and Ebisawa, K

Subjects
DARK matter, COSMIC rays, ELECTRONS, GAMMA rays
Abstract

The CALorimetric Electron Telescope (CALET) space experiment, which has been developed by Japan in collaboration with Italy and the United States, is a high-energy astroparticle physics mission on the International Space Station (ISS). The primary goals of the CALET mission include investigation of possible nearby sources of high-energy electrons, detailed study of galactic cosmic-ray acceleration and propagation, and search for dark matter signatures. With a long-term observation onboard the ISS, the CALET experiment measures the flux of cosmic-ray electrons (including positrons) up to 20 TeV, gamma-rays to 10 TeV, and nuclei up to 1,000 TeV based on its charge separation capability from Z = 1 to 40. Since the start of science operation in mid-October, 2015, a continuous observation has been maintained without any major interruptions. The number of triggered events over 10 GeV is nearly 20 million per month. By using the data obtained during the first two-years, here we present a summary of the CALET observations: 1) Electron+positron energy spectrum, 2) Nuclei analysis, 3) Gamma-ray observation with a characterization of the on-orbit performance. The search results for the electromagnetic counterparts of LIGO/Virgo gravitational wave events are also discussed. [ABSTRACT FROM AUTHOR]

Published
2019
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5. CaloCube: a novel calorimeter for high-energy cosmic rays in space.

Author

Rappoldi, A., Cattaneo, P. W., Adriani, O., Agnesi, A., Albergo, S., Auditore, L., Basti, A., Berti, E., Bigongiari, G., Bonechi, L., Bonechi, S., Bongi, M., Bonvicini, V., Bottai, S., Brogi, P., Cappello, G., Carotenuto, G., Castellini, G., D'Alessandro, R., and Detti, S.

Subjects
COSMIC rays, CALORIMETERS, PARTICLE beams, CRYSTAL structure, PHOTODIODES, PARTICLE physics
Abstract

CaloCube is an R&D project borne to develop a novel calorimeter design, optimized for high-energy cosmic ray measurements in space. A small prototype made of CsI(T1) elements has been built and tested on particle beams. A final version, made of 5×5×18 crystals and with dual readout (two photodiodes for each crystal), to cover the full required dynamic range, is under construction and will be tested at CERN SPS in Summer 2016. The dual readout compensation technique were developed and the feasibility to e×tract Č erenkov signals from CsI crystals verified. [ABSTRACT FROM AUTHOR]

Published
2017
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6. The CALorimetric Electron Telescope (CALET) for high-energy astroparticle physics on the International Space Station.

Author

Adriani, O., Akaike, Y., Asano, K., Asaoka, Y., Bagliesi, M. G., Bigongiari, G., Binns, W. R., Bonechi, S., Bongi, M., Buckley, J. H., Castellini, G., Cherry, M. L., Collazuol, G., Ebisawa, K., Di Felice, V., Fuke, H., Guzik, T. G., Hams, T., Hareyama, M., and Hasebe, N.

Subjects
NUCLEAR astrophysics research, COSMIC rays, ELECTRON research, GAMMA ray bursts, DARK matter, CALORIMETERS
Abstract

The CALorimetric Electron Telescope (CALET) is a space experiment, currently under development by Japan in collaboration with Italy and the United States, which will measure the flux of cosmic-ray electrons (and positrons) up to 20 TeV energy, of gamma rays up to 10 TeV, of nuclei with Z from 1 to 40 up to 1 PeV energy, and will detect gamma-ray bursts in the 7 keV to 20 MeV energy range during a 5 year mission. These measurements are essential to investigate possible nearby astrophysical sources of high energy electrons, study the details of galactic particle propagation and search for dark matter signatures. The main detector of CALET, the Calorimeter, consists of a module to identify the particle charge, followed by a thin imaging calorimeter (3 radiation lengths) with tungsten plates interleaving scintillating fibre planes, and a thick energy measuring calorimeter (27 radiation lengths) composed of lead tungstate logs. The Calorimeter has the depth, imaging capabilities and energy resolution necessary for excellent separation between hadrons, electrons and gamma rays. The instrument is currently being prepared for launch (expected in 2015) to the International Space Station ISS, for installation on the Japanese Experiment Module - Exposure Facility (JEM-EF). [ABSTRACT FROM AUTHOR]

Published
2015
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7. On-orbit operations and offline data processing of CALET onboard the ISS.

Author

Asaoka, Y., Ozawa, S., Torii, S., Adriani, O., Akaike, Y., Asano, K., Bagliesi, M.G., Bigongiari, G., Binns, W.R., Bonechi, S., Bongi, M., Brogi, P., Buckley, J.H., Cannady, N., Castellini, G., Checchia, C., Cherry, M.L., Collazuol, G., Di Felice, V., and Ebisawa, K.

Subjects
*CALORIMETERS, *CALORIMETER calibration, *COSMIC rays, *GAMMA rays
Abstract

The CALorimetric Electron Telescope (CALET), launched for installation on the International Space Station (ISS) in August, 2015, has been accumulating scientific data since October, 2015. CALET is intended to perform long-duration observations of high-energy cosmic rays onboard the ISS. CALET directly measures the cosmic-ray electron spectrum in the energy range of 1 GeV to 20 TeV with a 2% energy resolution above 30 GeV. In addition, the instrument can measure the spectrum of gamma rays well into the TeV range, and the spectra of protons and nuclei up to a PeV. In order to operate the CALET onboard ISS, JAXA Ground Support Equipment (JAXA-GSE) and the Waseda CALET Operations Center (WCOC) have been established at JAXA and Waseda University, respectively. Scientific operations using CALET are planned at WCOC, taking into account orbital variations of geomagnetic rigidity cutoff. Scheduled command sequences are used to control the CALET observation modes on orbit. Calibration data acquisition by, for example, recording pedestal and penetrating particle events, a low-energy electron trigger mode operating at high geomagnetic latitude, a low-energy gamma-ray trigger mode operating at low geomagnetic latitude, and an ultra heavy trigger mode, are scheduled around the ISS orbit while maintaining maximum exposure to high-energy electrons and other high-energy shower events by always having the high-energy trigger mode active. The WCOC also prepares and distributes CALET flight data to collaborators in Italy and the United States. As of August 31, 2017, the total observation time is 689 days with a live time fraction of the total time of  ∼ 84%. Nearly 450 million events are collected with a high-energy ( E  > 10 GeV) trigger. In addition, calibration data acquisition and low-energy trigger modes, as well as an ultra-heavy trigger mode, are consistently scheduled around the ISS orbit. By combining all operation modes with the excellent-quality on-orbit data collected thus far, it is expected that a five-year observation period will provide a wealth of new and interesting results. [ABSTRACT FROM AUTHOR]

Published
2018
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8. CaloCube: An isotropic spaceborne calorimeter for high-energy cosmic rays. Optimization of the detector performance for protons and nuclei.

Author

Adriani, O., Albergo, S., Auditore, L., Basti, A., Berti, E., Bigongiari, G., Bonechi, L., Bonechi, S., Bongi, M., Bonvicini, V., Bottai, S., Brogi, P., Carotenuto, G., Castellini, G., Cattaneo, P.W., Daddi, N., D’Alessandro, R., Detti, S., Finetti, N., and Italiano, A.

Subjects
*CALORIMETERS, *COSMIC rays, *PROTONS, *GALACTIC nuclei, *ISOTROPIC properties, *SCINTILLATORS
Abstract

The direct detection of high-energy cosmic rays up to the PeV region is one of the major challenges for the next generation of space-borne cosmic-ray detectors. The physics performance will be primarily determined by their geometrical acceptance and energy resolution. CaloCube is a homogeneous calorimeter whose geometry allows an almost isotropic response, so as to detect particles arriving from every direction in space, thus maximizing the acceptance. A comparative study of different scintillating materials and mechanical structures has been performed by means of Monte Carlo simulation. The scintillation-Cherenkov dual read-out technique has been also considered and its benefit evaluated. [ABSTRACT FROM AUTHOR]

Published
2017
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9. Energy calibration of CALET onboard the International Space Station.

Author

Asaoka, Y., Akaike, Y., Komiya, Y., Miyata, R., Torii, S., Adriani, O., Asano, K., Bagliesi, M.G., Bigongiari, G., Binns, W.R., Bonechi, S., Bongi, M., Brogi, P., Buckley, J.H., Cannady, N., Castellini, G., Checchia, C., Cherry, M.L., Collazuol, G., and Di Felice, V.

Subjects
*TELESCOPES, *ELECTRON spectroscopy, *COSMIC rays, *CALORIMETERS
Abstract

In August 2015, the CALorimetric Electron Telescope (CALET), designed for long exposure observations of high energy cosmic rays, docked with the International Space Station (ISS) and shortly thereafter began to collect data. CALET will measure the cosmic ray electron spectrum over the energy range of 1 GeV to 20 TeV with a very high resolution of 2% above 100 GeV, based on a dedicated instrument incorporating an exceptionally thick 30 radiation-length calorimeter with both total absorption and imaging (TASC and IMC) units. Each TASC readout channel must be carefully calibrated over the extremely wide dynamic range of CALET that spans six orders of magnitude in order to obtain a degree of calibration accuracy matching the resolution of energy measurements. These calibrations consist of calculating the conversion factors between ADC units and energy deposits, ensuring linearity over each gain range, and providing a seamless transition between neighboring gain ranges. This paper describes these calibration methods in detail, along with the resulting data and associated accuracies. The results presented in this paper show that a sufficient accuracy was achieved for the calibrations of each channel in order to obtain a suitable resolution over the entire dynamic range of the electron spectrum measurement. [ABSTRACT FROM AUTHOR]

Published
2017
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10. CaloCube: A new-concept calorimeter for the detection of high-energy cosmic rays in space.

Author

Vannuccini, E., Adriani, O., Agnesi, A., Albergo, S., Auditore, L., Basti, A., Berti, E., Bigongiari, G., Bonechi, L., Bonechi, S., Bongi, M., Bonvicini, V., Bottai, S., Brogi, P., Carotenuto, G., Castellini, G., Cattaneo, P.W., D'Alessandro, R., Detti, S., and Fasoli, M.

Subjects
*COSMIC rays, *NUCLEAR counters, *GEOMETRIC analysis, *CALORIMETERS, *NUCLEAR physics experiments
Abstract

The direct observation of high-energy cosmic rays, up to the PeV region, will increasingly rely on highly performing calorimeters, and the physics performance will be primarily determined by their geometrical acceptance and energy resolution. Thus, it is extremely important to optimize their geometrical design, granularity, and absorption depth, with respect to the total mass of the apparatus, which is among the most important constraints for a space mission. Calocube is a homogeneous calorimeter whose basic geometry is cubic and isotropic, so as to detect particles arriving from every direction in space, thus maximizing the acceptance; granularity is obtained by filling the cubic volume with small cubic scintillating crystals. This design forms the basis of a three-year R & D activity which has been approved and financed by INFN. A comparative study of different scintillating materials has been performed. Optimal values for the size of the crystals and spacing among them have been studied. Different geometries, besides the cubic one, and the possibility to implement dual-readout techniques have been investigated. A prototype, instrumented with CsI(Tl) cubic crystals, has been constructed and tested with particle beams. An overview of the obtained results will be presented and the perspectives for future space experiments will be discussed. [ABSTRACT FROM AUTHOR]

Published
2017
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11. Calocube—A highly segmented calorimeter for a space based experiment.

Author

D׳Alessandro, R., Adriani, O., Agnesi, A., Albergo, S., Auditore, L., Basti, A., Berti, E., Bigongiari, G., Bonechi, L., Bonechi, S., Bongi, M., Bonvicini, V., Bottai, S., Brogi, P., Carotenuto, G., Castellini, G., Cattaneo, P.W., Cauz, D., Chiari, M., and Daddi, N.

Subjects
*COSMIC rays, *CALORIMETRY, *ACCELERATION (Mechanics), *PARTICLES (Nuclear physics), *PROTOTYPES
Abstract

Future research in High Energy Cosmic Ray Physics concerns fundamental questions on their origin, acceleration mechanism, and composition. 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. Only ground based observations, which rely on sophisticated models describing high energy interactions in the earth׳s atmosphere, have been possible so far due to the extremely low particle rates at these energies. A calorimeter based space experiment can provide not only flux measurements but also energy spectra and particle identification, especially when coupled to a dE/dx measuring detector, and thus overcome some of the limitations plaguing ground based experiments. For this to be possible very large acceptances are needed if enough statistic is to be collected in a reasonable time. This contrasts with the lightness and compactness requirements for space based experiments. A novel idea in calorimetry is discussed here which addresses these issues while limiting the mass and volume of the detector. In fact a small prototype is currently being built and tested with ions. In this paper the results obtained will be presented in light of the simulations performed. [ABSTRACT FROM AUTHOR]

Published
2016
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12. Separation of electrons and protons in the GAMMA-400 gamma-ray telescope.

Author

Leonov, A.A., Galper, A.M., Bonvicini, V., Topchiev, N.P., Adriaini, O., Aptekar, R.L., Arkhangelskaja, I.V., Arkhangelskiy, A.I., Bergstrom, L., Berti, E., Bigongiari, G., Bobkov, S.G., Boezio, M., Bogomolov, E.A., Bonechi, S., Bongi, M., Bottai, S., Castellini, G., Cattaneo, P.W., and Cumani, P.

Subjects
*SEPARATION (Technology), *PROTONS, *GAMMA rays, *COSMIC rays, *ELECTRONS, *DARK matter
Abstract

The GAMMA-400 telescope will measure the fluxes of gamma rays and cosmic-ray electrons and positrons in the energy range from 100 MeV to several TeV. These measurements will allow it to achieve the following scientific objectives: search for signatures of dark matter, investigation of gamma-ray point-like and extended sources, study of the energy spectrum of the Galactic and extragalactic diffuse emission, study of gamma-ray bursts and gamma-ray emission from the active Sun, together with high-precision measurements of the high-energy electrons and positrons spectra, protons and nuclei up to the knee. The bulk of cosmic rays are protons and helium nuclei, whereas the lepton component in the total flux is ∼10 −3 at high energy. In the present paper, the simulated capability of the GAMMA-400 telescope to distinguish electrons and positrons from protons in cosmic rays is addressed. The individual contribution to the proton rejection from each detector system of GAMMA-400 is studied separately. The use of the combined information from all detectors allows us to reach a proton rejection of the order of ∼4 × 10 5 for vertical incident particles and ∼3 × 10 5 for particles with initial inclination of 30° in the electron energy range from 50 GeV to 1 TeV. [ABSTRACT FROM AUTHOR]

Published
2015
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13. Homogeneous and isotropic calorimetry for space experiments.

Author

Mori, N., Adriani, O., Basti, A., Bigongiari, G., Bonechi, L., Bonechi, S., Bongi, M., Bottai, S., Brogi, P., D'Alessandro, R., Detti, S., Lenzi, P., Maestro, P., Marrocchesi, P.S., Papini, P., Spillantini, P., Starodubtsev, O., Sulaj, A., and Vannuccini, E.

Subjects
*CALORIMETRY, *PARTICLES (Nuclear physics), *ELECTROMAGNETISM, *GAMMA rays, *COSMIC rays, *ISOTROPIC properties, *CESIUM iodide
Abstract

Abstract: Calorimetry plays an essential role in experiments observing high energy gamma and cosmic rays in space. The observational capabilities are mainly limited by the geometrical dimensions and the mass of the calorimeter. Since deployable mass depends on the design of the detector and the total mass of the payload, it is important to optimize the geometrical acceptance of the calorimeter for rare events, its granularity for particle identification, and its absorption depth for the measurement of the particle energy. A design of a calorimeter that could simultaneously optimize these characteristics assuming a mass limit of about 1.6t has been studied. As a result, a homogeneous calorimeter instrumented with cesium iodide (CsI) crystals was chosen as the best compromise given the total mass constraint. The most suitable geometry found is cubic and isotropic, so as to detect particles arriving from every direction in space, thus maximizing the acceptance; granularity is obtained by filling the cubic volume with small cubic CsI crystals. The total radiation length in any direction is very large, and allows for optimal electromagnetic particle identification and energy measurement, while the interaction length is at least sufficient to allow a precise reconstruction of hadronic showers. Optimal values for the size of the crystals and spacing among them have been studied. Two prototypes have been constructed and preliminary tests with high energy ion and muon beams are reported. [Copyright &y& Elsevier]

Published
2013
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14. Beam test performance of SiPM-based detectors for cosmic-ray experiments

Author

Kim, M.Y., Bagliesi, M.G., Bigongiari, G., Bonechi, S., Marrocchesi, P.S., and Maestro, P.

Subjects
*NUCLEAR counters, *PHOTOMULTIPLIERS, *SILICON, *GIRDERS, *PERFORMANCE evaluation, *METAL detectors, *KINETIC energy, *COSMIC rays
Abstract

Abstract: Particle detector prototypes, equipped with Silicon PhotoMultipliers (SiPMs) and readout by dedicated front-end electronics, were tested with beams of fully ionized nuclei from boron (Z=5) to nickel (Z=28) with a kinetic energy , at the Fragment Separator (FRS) of the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt. The tested instruments included prototypes of Cherenkov and scintillation hodoscopes designed for cosmic-ray experiments in space or in the upper atmosphere. In this paper, we summarize the results from the analysis of the beam tests data and of dedicated laboratory tests to characterize the response of the photosensors, the front-end electronics and the performance of the prototypal detectors. [Copyright &y& Elsevier]

Published
2013
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15. Beam test performance of a pixelated silicon array for the charge identification of cosmic rays

Author

Maestro, P., Bagliesi, M.G., Bigongiari, G., Bonechi, S., Kim, M.Y., and Marrocchesi, P.S.

Subjects
*SILICON compounds, *ELECTRIC charge, *COSMIC rays, *RELATIVISTIC mechanics, *SEPARATION (Technology), *DETECTORS, *PIXELS
Abstract

Abstract: A large area silicon array for the next generation of space-based experiments has been designed to determine, via multiple measurements, the electric charge of cosmic radiation. The instrument can achieve an excellent charge discrimination, thus allowing to assess the elemental composition of charged cosmic rays at relativistic energies. Pairs of silicon sensors segmented into pixels were tested with a beam of fully ionized nuclei from boron to nickel (=28) with a kinetic energy of , at the Fragment Separator (FRS) of the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt. The response of the sensors to different nuclear species was accurately characterized. The results of the beam test clearly show that a double-layered silicon array can achieve single-element separation with a resolution close to 0.2 electron charge units, in the whole interval of atomic number under test. [Copyright &y& Elsevier]

Published
2012
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16. 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

17. A new approach to calorimetry in space-based experiments for high-energy cosmic rays

Author

M. Duranti, S. B. Ricciarini, Piergiulio Lenzi, Miriam Olmi, E. Vannuccini, Anna Vedda, Noemi Finetti, Maria Grazia Pellegriti, V. Bonvicini, Gabriele Bigongiari, Massimo Bongi, Eugenio Berti, Jung Eun Suh, Sebastiano Albergo, Alessio Tiberio, A. Sciuto, F. Stolzi, S. Bonechi, Lucrezia Auditore, Marina Trimarchi, Maria Ionica, Paolo Papini, S. Detti, Gianluigi Silvestre, P. W. Cattaneo, Paolo Maestro, S. Bottai, N. Zampa, Antonio Trifiro, G. Orzan, Giovanni Ambrosi, Gigi Cappello, P. S. Marrocchesi, O. Adriani, A. Rappoldi, L. Pacini, Valerio Formato, A. Sulaj, Antonio Italiano, Lorenzo Bonechi, Mauro Fasoli, Paolo Brogi, Nicola Mori, Gianluigi Zampa, Raffaello D'Alessandro, Alessia Tricomi, A. Basti, O. Starodubtsev, Bigongiari, G, Adriani, O, Albergo, S, Ambrosi, G, Auditore, L, Basti, A, Berti, E, Bonechi, L, Bonechi, S, Bongi, M, Bonvicini, V, Bottai, S, Brogi, P, Cappello, G, Cattaneo, P, D'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, Pellegriti, M, Rappoldi, A, Ricciarini, S, Sciuto, A, Silvestre, G, Starodubtsev, O, Stolzi, F, Suh, J, Sulaj, A, Tiberio, A, Tricomi, A, Trifiro, A, Trimarchi, M, Vannuccini, E, Vedda, A, Zampa, G, and Zampa, N

Subjects
lcsh:QC793-793.5, Physics::Instrumentation and Detectors, Hadron, Monte Carlo method, General Physics and Astronomy, Cosmic ray, Calorimetry, Electron, 01 natural sciences, Spectral line, Physics and Astronomy (all), Astroparticle, 0103 physical sciences, 7-ray astronomy, Astroparticles, Cosmic rays, Ultra-high-energy cosmic ray, 010306 general physics, ++++γ<%2Fmml%3Ami>+<%2Fmml%3Amrow>+<%2Fmml%3Asemantics>+<%2Fmml%3Amath>+<%2Finline-formula><%2Fnamed-content>-ray+astronomy%22"> γ -ray astronomy, Gamma-ray astronomy, Physics, 010308 nuclear & particles physics, lcsh:Elementary particle physics, Detector, Computational physics, γ -ray astronomy
Abstract

Precise measurements of the energy spectra and of the composition of cosmic rays in the PeV region could improve our knowledge regarding their origin, acceleration mechanism, propagation, and composition. At the present time, spectral measurements in this region are mainly derived from data collected by ground-based detectors, because of the very low particle rates at these energies. Unfortunately, these results are affected by the high uncertainties typical of indirect measurements, which depend on the complicated modeling of the interaction of the primary particle with the atmosphere. A space experiment dedicated to measurements in this energy region has to achieve a balance between the requirements of lightness and compactness, with that of a large acceptance to cope with the low particle rates. CaloCube is a four-year-old R&amp, D project, approved and financed by the Istituto Nazionale di Fisica Nucleare (INFN) in 2014, aiming to optimize the design of a space-borne calorimeter. The large acceptance needed is obtained by maximizing the number of entrance windows, while thanks to its homogeneity and high segmentation this new detector achieves an excellent energy resolution and an enhanced separation power between hadrons and electrons. In order to optimize 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 MonteCarlo simulations. In parallel to simulations studies, several prototypes instrumented with CsI(Tl) (Caesium Iodide, Tallium doped) cubic crystals have been constructed and tested with particle beams. Moreover, the last development of CaloCube, the Tracker-In-Calorimeter (TIC) project, financed by the INFN in 2018, is focused on the feasibility of including several silicon layers at different depths in the calorimeter in order to reconstruct the particle direction. In fact, an important requirement for &gamma, ray astronomy is to have a good angular resolution in order to allow precise identification of astrophysical sources in space. In respect to the traditional approach of using a tracker with passive material in front of the calorimeter, the TIC solution can save a significant amount of mass budget in a space satellite experiment, which can then be exploited to improve the acceptance and the resolution of the calorimeter. In this paper, the status of the project and perspectives for future developments are presented.

Published
2019

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

Author

Anna Vedda, E. Vannuccini, P. Papini, G. Castellini, O. Adriani, Raffaello D'Alessandro, Lorenzo Bonechi, A. Basti, P. W. Cattaneo, A. Sulaj, O. Starodubtsev, Gianluigi Zampa, G. Orzan, P. Spillantini, A. Tricomi, Maria Miritello, Antoniangelo Agnesi, L. Auditore, S. Albergo, J. E. Suh, M. Olmi, Emilio Berti, Mauro Fasoli, Nicola Mori, B. Zerbo, M. Bongi, S. Bonechi, Paolo Maestro, M. Trimarchi, S. B. Ricciarini, P. Lenzi, Gabriele Bigongiari, P. S. Marrocchesi, Paolo Brogi, Federico Pirzio, N. Finetti, A. Rappoldi, N. Zampa, G. Carotenuto, A. Tiberio, S. Detti, V. Bonvicini, S. Bottai, A. Trifiro, F. Stolzi, L. Pacini, M. G. Pellegriti, Vannuccini, E, Adriani, O, Agnesi, A, Albergo, S, Auditore, L, Basti, A, Berti, E, Bigongiari, G, Bonechi, L, Bonechi, S, Bongi, M, Bonvicini, V, Bottai, S, Brogi, P, Carotenuto, G, Castellini, G, Cattaneo, P, D'Alessandro, R, Detti, S, Fasoli, M, Finetti, N, Lenzi, P, Maestro, P, Marrocchesi, P, Miritello, M, Mori, N, Orzan, G, Olmi, M, Pacini, L, Papini, P, Pellegriti, M, Pirzio, F, Rappoldi, A, Ricciarini, S, Spillantini, P, Starodubtsev, O, Stolzi, F, Suh, J, Sulaj, A, Tiberio, A, Tricomi, A, Trifiro, A, Trimarchi, M, Vedda, A, Zampa, G, Zampa, N, and Zerbo, B

Subjects
Scintillating crystal, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, FIS/07 - FISICA APPLICATA (A BENI CULTURALI, AMBIENTALI, BIOLOGIA E MEDICINA), Cosmic ray, Space (mathematics), 01 natural sciences, Scintillating crystals, 0103 physical sciences, Ultra-high-energy cosmic ray, Absorption (electromagnetic radiation), 010303 astronomy & astrophysics, Cosmic rays, Instrumentation, Nuclear and High Energy Physic, Physics, Calorimeter, Basis (linear algebra), 010308 nuclear & particles physics, Isotropy, Computational physics, FIS/01 - FISICA SPERIMENTALE, Granularity
Abstract

The direct observation of high-energy cosmic rays, up to the PeV region, will increasingly rely on highly performing calorimeters, and the physics performance will be primarily determined by their geometrical acceptance and energy resolution. Thus, it is extremely important to optimize their geometrical design, granularity, and absorption depth, with respect to the total mass of the apparatus, which is among the most important constraints for a space mission. Calocube is a homogeneous calorimeter whose basic geometry is cubic and isotropic, so as to detect particles arriving from every direction in space, thus maximizing the acceptance; granularity is obtained by filling the cubic volume with small cubic scintillating crystals. This design forms the basis of a three-year R & D activity which has been approved and financed by INFN. A comparative study of different scintillating materials has been performed. Optimal values for the size of the crystals and spacing among them have been studied. Different geometries, besides the cubic one, and the possibility to implement dual-readout techniques have been investigated. A prototype, instrumented with CsI(Tl) cubic crystals, has been constructed and tested with particle beams. An overview of the obtained results will be presented and the perspectives for future space experiments will be discussed.

Published
2017

19. Perspectives of the GAMMA-400 space observatory for high-energy gamma rays and cosmic rays measurements

Author

A. L. Menshenin, G. Castellini, M. F. Runtso, S G Bobkov, Valery Korepanov, N P Topchiev, O. D. Dalkarov, Yu. I. Stozhkov, A. A. Moiseev, R. L. Aptekar, G Bigongiari, Francesco Longo, N Finetti, C. De Donato, A. Vacchi, A Tiberio, P.W. Cattaneo, P S Marrocchesi, P. Yu. Naumov, V. V. Mikhailov, A. V. Bakaldin, Roberta Sparvoli, N. Zampa, Vladimir Kaplin, A. M. Galper, Igor V. Moskalenko, Nicola Mori, Yu. T. Yurkin, E. M. Tyurin, P. Picozza, S. Bonechi, Felix Ryde, Paolo Maestro, M. Ulanov, V. V. Kadilin, Mark Pearce, E. Vannuccini, Piero Spillantini, Maxim S. Gorbunov, O. V. Serdin, Josefin Larsson, P. Papini, Marco Tavani, A. Rappoldi, Mirko Boezio, A. A. Taraskin, S. B. Ricciarini, S. I. Suchkov, V. N. Zirakashvili, I. V. Arkhangelskaja, V. A. Loginov, O. Adriani, G. L. Dedenko, G. I. Vasilyev, Bohdan Hnatyk, V. G. Zverev, A. A. Kaplun, E. A. Bogomolov, Yu. V. Gusakov, E Berti, A.I. Arkhangelskiy, M. D. Kheymits, M. Bongi, E. Mocchiutti, P. Cumani, Alexey Leonov, V. Bonvicini, V. A. Dogiel, L. Bergstrom, S. Bottai, S. Rubin, A. Galper, A. Petrukhin, M. Skorokhvatov, Topchiev, N. P., Galper, A. M., Bonvicini, V., Adriani, O., Aptekar, R. L., Arkhangelskaja, I. V., Arkhangelskiy, A. I., Bakaldin, A. V., Bergstrom, L., Berti, E., Bigongiari, G., Bobkov, S. G., Boezio, M., Bogomolov, E. A., Bonechi, S., Bongi, M., Bottai, S., Castellini, G., Cattaneo, P. W., Cumani, P., Dalkarov, O. D., Dedenko, G. L., De Donato, C., Dogiel, V. A., Finetti, N., Gorbunov, M. S., Gusakov, Y. V., Hnatyk, B. I., Kadilin, V. V., Kaplin, V. A., Kaplun, A. A., Kheymits, M. D., Korepanov, V. E., Larsson, J., Leonov, A. A., Loginov, V. A., Longo, F., Maestro, P., Marrocchesi, P. S., Men'Shenin, A. L., Mikhailov, V. V., Mocchiutti, E., Moiseev, A. A., Mori, N., Moskalenko, I. V., Naumov, P. Y., Papini, P., Pearce, M., Picozza, P., Rappoldi, A., Ricciarini, S., Runtso, M. F., Ryde, F., Serdin, O. V., Sparvoli, R., Spillantini, P., Stozhkov, Y. I., Suchkov, S. I., Taraskin, A. A., Tavani, M., Tiberio, A., Tyurin, E. M., Ulanov, M. V., Vacchi, A., Vannuccini, E., Vasilyev, G. I., Yurkin, Y. T., Zampa, N., Zirakashvili, V. N., and Zverev, V. G.

Subjects
History, 010504 meteorology & atmospheric sciences, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, Highly elliptical orbit, cosmic-rays, Cosmic ray, Astrophysics, 01 natural sciences, Education, law.invention, Telescope, Physics and Astronomy (all), law, 0103 physical sciences, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Physics, Settore FIS/04, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, gamma-ray telescopes, Gamma-ray astronomy, Orbital period, gamma-ray telescope, Computer Science Applications, Cosmic ray measurement, Cosmic rays, Cosmology, Positrons, Space platforms, Telescopes, Tellurium compounds, Fermi Gamma-ray Space Telescope
Abstract

The GAMMA-400 gamma-ray telescope is intended to measure the fluxes of gamma-rays and cosmic-ray electrons and positrons in the energy range from 100 MeV to several TeV. Such measurements concern the following scientific tasks: investigation of point sources of gamma-rays, studies of the energy spectra of Galactic and extragalactic diffuse emission, studies of gamma-ray bursts and gamma-ray emission from the Sun, as well as high precision measurements of spectra of high-energy electrons and positrons. Also the GAMMA- 400 instrument provides the possibility for protons and nuclei measurements up to knee. But the main goal for the GAMMA-400 mission is to perform a sensitive search for signatures of dark matter particles in high-energy gamma-ray emission. To fulfill these measurements the GAMMA-400 gamma-ray telescope possesses unique physical characteristics in comparison with previous and present experiments. The major advantage of the GAMMA-400 instrument is excellent angular and energy resolution for gamma-rays above 10 GeV. The GAMMA-400 experiment will be installed onboard of the Navigator space platform, manufactured by the NPO Lavochkin Association. The expected orbit will be a highly elliptical orbit (with apogee 300.000 km and perigee 500 km) with 7 days orbital period. An important profit of such an orbit is the fact that the full sky coverage will always be available for gamma ray astronomy.

Published
2016

20. The GAMMA-400 experiment: Status and prospects

Author

A. M. Galper, Yu. T. Yurkin, O. V. Serdin, P. Spillantini, S. Bonechi, A. A. Kaplun, Josefin Larsson, Marco Tavani, C. Fuglesang, Felix Ryde, R. L. Aptekar, G. I. Vasilyev, A. V. Popov, G. Castellini, Igor V. Moskalenko, Maxim S. Gorbunov, Francesco Longo, S. Bottai, V. V. Kadilin, Gabriele Bigongiari, K. A. Boyarchuk, A. A. Taraskin, Nicola Mori, Eugenio Berti, A. Tiberio, M. F. Runtso, Roberta Sparvoli, Mirko Boezio, M. D. Kheymits, Valery Korepanov, A. A. Moiseev, E. A. Bogomolov, M. Bongi, P. Yu. Naumov, V. A. Loginov, C. De Donato, Vladimir Kaplin, Alexey Leonov, V. V. Mikhailov, P. Picozza, N. P. Topchiev, Paolo Maestro, Andrea Vacchi, L. Bergstrom, P. W. Cattaneo, G. L. Dedenko, Yu. V. Gusakov, S G Bobkov, N. Zampa, O. Adriani, Bohdan Hnatyk, V. G. Zverev, E. M. Tyurin, E. Mocchiutti, P. S. Marrocchesi, M. Ulanov, P. Cumani, A. Rappoldi, V. Bonvicini, V. A. Dogiel, I. V. Arkhangelskaja, S. I. Suchkov, Mark Pearce, S. B. Ricciarini, P. Papini, E. Vannuccini, V. N. Zirakashvili, A.I. Arkhangelskiy, Topchiev, N. P., Galper, A. M., Bonvicini, V., Adriani, O., Aptekar, R. L., Arkhangelskaja, I. V., Arkhangelskiy, A. I., Bergstrom, L., Berti, E., Bigongiari, G., Bobkov, S. G., Bogomolov, E. A., Boezio, M., Bongi, M., Bonechi, S., Bottai, S., Boyarchuk, K. A., Vacchi, A., Vannuccini, E., Vasilyev, G. I., Castellini, G., Cattaneo, P. W., Cumani, P., Dedenko, G. L., Dogiel, V. A., De Donato, C., Hnatyk, B. I., Gorbunov, M. S., Gusakov, Y. V., Zampa, N., Zverev, V. G., Zirakashvili, V. N., Kadilin, V. V., Kaplin, V. A., Kaplun, A. A., Korepanov, V. E., Larsson, J., Leonov, A. A., Loginov, V. A., Longo, F., Maestro, P., Marrocchesi, P. S., Mikhailov, V. V., Mocchiutti, E., Moiseev, A. A., Mori, N., Moskalenko, I. V., Naumov, P. Y., Papini, P., Picozza, P., Pearce, M., Popov, A. V., Ryde, F., Rappoldi, A., Ricciarini, S., Runtso, M. F., Serdin, O. V., Sparvoli, R., Spillantini, P., Suchkov, S. I., Tavani, M., Taraskin, A. A., Tiberio, A., Tyurin, E. M., Ulanov, M. V., Fuglesang, C., Kheymits, M. D., and Yurkin, Y. T.

Subjects
Physics, gamma-ray astrophysics, gamma-ray telescopes, Settore FIS/04, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, gamma-ray astrophysic, General Physics and Astronomy, Astronomy, Cosmic ray, Astrophysics, Galaxy, law.invention, Telescope, Physics and Astronomy (all), law, Observatory, Angular resolution, Cosmic rays, Positrons, Telescopes, Gamma rays, Gamma-ray burst, Fermi Gamma-ray Space Telescope
Abstract

The development of the GAMMA-400 ?-ray telescope continues. The GAMMA-400 is designed to measure fluxes of ?-rays and the electron-positron cosmic-ray component possibly associated with annihilation or decay of dark matter particles; and to search for and study in detail discrete ?-ray sources, to measure the energy spectra of Galactic and extragalactic diffuse ?-rays, and to study ?-ray bursts and ?-rays from the active Sun. The energy range for measuring ?-rays and electrons (positrons) is from 100 MeV to 3000 GeV. For 100-GeV ?-rays, the ?-ray telescope has an angular resolution of ~0.01°, an energy resolution of ~1%, and a proton rejection factor of ~5 × 105. The GAMMA-400 will be installed onboard the Russian Space Observatory.

Published
2015

21. Space γ-observatory GAMMA-400 Current Status and Perspectives

Author

V. Bonvicini, Valery Korepanov, V. A. Dogiel, Maxim S. Gorbunov, A. A. Taraskin, E. Mocchiutti, V. A. Loginov, M. Bongi, P. Spillantini, S G Bobkov, P. Yu. Naumov, A. M. Galper, A. Vacchi, Yu. V. Gusakov, Vladimir Kaplin, Mark Pearce, S. B. Ricciarini, E. M. Tyurin, A. Tiberio, P. Papini, L. Bergstrom, Igor V. Moskalenko, E. Vannuccini, M. F. Runtso, Francesco Longo, S. Bottai, V. V. Kadilin, R. L. Aptekar, M. D. Kheymits, I. V. Arkhangelskaja, V. N. Zirakashvili, O. Adriani, V. V. Mikhailov, A. A. Moiseev, Yu. T. Yurkin, O. V. Serdin, S. I. Suchkov, Josefin Larsson, Marco Tavani, P. Picozza, G. L. Dedenko, R. Sparvoli, N. Zampa, Bohdan Hnatyk, V. G. Zverev, G. I. Vasilyev, A.I. Arkhangelskiy, M. Ulanov, Gabriele Bigongiari, Eugenio Berti, P. Cumani, A. Rappoldi, Nicola Mori, C. De Donato, P. S. Marrocchesi, S. Bonechi, A. A. Kaplun, Felix Ryde, G. Castellini, Alexey Leonov, P. W. Cattaneo, E. A. Bogomolov, N. P. Topchiev, Paolo Maestro, Mirko Boezio, Irene V. Arkhangelskaja, Pavel Zh. Buzhan, Galper, A. M., Bonvicini, V., Topchiev, N. P., Adriani, O., Aptekar, R. L., Arkhangelskaja, I. V., Arkhangelskiy, A. I., Bergstrom, L., Berti, E., Bigongiari, G., Bobkov, S. G., Boezio, M., Bogomolov, E. A., Bonechi, S., Bongi, M., Bottai, S., Castellini, G., Cattaneo, P. W., Cumani, P., Dedenko, G. L., De Donato, C., Dogiel, V. A., Gorbunov, M. S., Gusakov, Yu. V., Hnatyk, B. I., Kadilin, V. V., Kaplin, V. A., Kaplun, A. A., Kheymits, M. D., Korepanov, V. E., Larsson, J., Leonov, A. A., Loginov, V. A., Longo, F., Maestro, P., Marrocchesi, P. S., Mikhailov, V. V., Mocchiutti, E., Moiseev, A. A., Mori, N., Moskalenko, I. V., Naumov, P. Yu., Papini, P., Pearce, M., Picozza, P., Rappoldi, A., Ricciarini, S., Runtso, M. F., Ryde, F., Serdin, O. V., Sparvoli, R., Spillantini, P., Suchkov, S. I., Tavani, M., Taraskin, A. A., Tiberio, A., Tyurin, E. M., Ulanov, M. V., Vacchi, A., Vannuccini, E., Vasilyev, G. I., Yurkin, Yu. T., Zampa, N., Zirakashvili, V. N., and Zverev, V. G.

Subjects
Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Physics and Astronomy(all), cosmic rays, dark matter, gamma-astronomy, Space (mathematics), Physics and Astronomy (all), Measure (mathematics), law.invention, Telescope, Observatory, law, cosmic ray, Settore FIS/01, Physics, Annihilation, Astrophysics::Instrumentation and Methods for Astrophysics, General Medicine, High Energy Physics::Experiment, Current (fluid)
Abstract

GAMMA-400 γ-ray telescope is designed to measure fluxes of γ-rays and the electron–positron cosmic ray component possibly generated in annihilation or decay of dark matter particles; to search for and study in detail discrete γ-ray sources, to examine the energy spectra of Galactic and extragalactic diffuse γ-rays, to study γ-ray bursts and γ-rays from the active Sun. GAMMA-400 consists of plastic scintillation anticoincidence top and lateral detectors, converter-tracker, plastic scintillation detectors for the time-of-flight system (TOF), two-part calorimeter (CC1 and CC2), plastic scintillation lateral detectors of calorimeter, plastic scintillation detectors of calorimeter, and neutron detector. The converter-tracker consists of 13 layers of double (x, y) silicon strip coordinate detectors (pitch of 0.08mm). The first three and final one layers are without tungsten while the middle nine layers are interleaved with nine tungsten conversion foils. The thickness of CC1 and CC2 is 2 X0 (0.1λ0) and 23 X0 (1.1λ0) respectively (where X0 is radiation length and λ0 is nuclear interaction one). The total calorimeter thickness is 25 X0 or 1.2λ0 for vertical incident particles registration and 54 X0 or 2.5λ0 for laterally incident ones.The energy range for γ-rays and electrons (positrons) registration in the main aperture is from ∼0.1GeV to ∼3.0 TeV. The γ-ray telescope main aperture angular and energy resolutions are respectively ∼0.01 and ∼1% for 102 GeV γ-quanta, the proton rejection factor is ∼5×105. The first three strip layers without tungsten provide the registration of γ-rays down to ∼20 MeV in the main aperture. Also this aperture allows investigating high energy light nuclei fluxes characteristics.Electrons, positrons, light nuclei and gamma-quanta will also register from the lateral directions due to special aperture configuration. Lateral aperture energy resolution is the same as for main aperture for electrons, positrons, light nuclei and gamma-quanta in energy range E>1.0GeV. But using lateral aperture it is possible to detect low-energy gammas in the ranges 0.2 − 10 MeV and 10 MeV – 1.0GeV with energy resolution 8% − 2% and 2% correspondingly accordingly to GAMMA-400 “Technical Project” stage results. Angular resolution in the lateral aperture provides only for low-energy gamma-quanta from non-stationary events (GRB, solar flares and so on) due segments of CC2 count rate analysis.GAMMA-400 γ-ray telescope will be installed onboard the Russian Space Observatory GAMMA-400. The lifetime of the space observatory will be at least seven years. The launch of the space observatory is scheduled for the early 2020s.

Published
2015

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