П. Спиллантини
A5105771732- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Neutrino Physics Research
- Particle Detector Development and Performance
- Gamma-ray bursts and supernovae
- Radiation Therapy and Dosimetry
- Astro and Planetary Science
- Particle physics theoretical and experimental studies
- Ionosphere and magnetosphere dynamics
- Atmospheric Ozone and Climate
- Radiation Detection and Scintillator Technologies
- Planetary Science and Exploration
- Atomic and Subatomic Physics Research
- Spacecraft Design and Technology
- Spacecraft and Cryogenic Technologies
- Geomagnetism and Paleomagnetism Studies
- Graphite, nuclear technology, radiation studies
- Earthquake Detection and Analysis
- Nuclear Physics and Applications
- Radiation Effects in Electronics
- Radioactive Decay and Measurement Techniques
- CCD and CMOS Imaging Sensors
- Advanced Optical Sensing Technologies
- Radio Astronomy Observations and Technology
National Research Nuclear University MEPhI
2013-2022
National Institute for Astrophysics
2016-2022
Institute for Space Astrophysics and Planetology
2017-2022
Agenzia Spaziale Italiana
2018-2021
National Institute of Optics
2018
University of Florence
2006-2018
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
2004-2017
Institute of Biomedical Problems
2005
GFZ Helmholtz Centre for Geosciences
2005
Istituto Nazionale di Fisica Nucleare
1986-2001
We report on a new measurement of the cosmic-ray electron and positron spectra. The data were collected by balloon-borne experiment CAPRICE94, which was flown from Lynn Lake, Canada, 1994 August 8-9 at an altitude corresponding to 3.9 g cm-2 average residual atmosphere. used NMSU-WIZARD/CAPRICE94 magnet spectrometer equipped with solid radiator Ring Imaging Cerenkov (RICH) detector, time-of-flight system, tracking device consisting drift chambers multiwire proportional chambers,...
We report on the absolute antiproton flux and to proton ratio in energy range 0.62-3.19 GeV at top of atmosphere, measured by balloon-borne experiment CAPRICE flown from Lynn Lake, Manitoba, Canada, 1994 August 8-9. The used New Mexico State University WiZard/CAPRICE magnet spectrometer equipped with a solid radiator Ring Imaging Cherenkov (RICH) detector silicon-tungsten calorimeter for particle identification. This is first time RICH together an imaging balloon experiment, it allows...
A measurement of the energy spectra cosmic-ray positrons and electrons was made with a balloon-borne magnet-spectrometer, which flown at mean geomagnetic cut-off 4.5 GV/c. The observed positron flux in range 7–16 GeV is approximately an order magnitude lower than that electrons, as measured other experiments various energies. power law spectral index differential spectrum interval 7.5–47 GeV. For overall fit available data above 7 has been considered. found to be fraction positrons, /( + ),...
The antiproton-to-proton ratio, /p, in cosmic rays has been measured the energy range 3.7-19 GeV. This measurement was carried out using a balloon-borne superconducting magnetic spectrometer along with gas Cerenkov counter, an imaging calorimeter, and time-of-flight scintillator system. /p ratio determined to be 1.24−0.51+0.68 × 10-4. present result, other recent observations, shows that observed abundances of antiprotons are consistent models which produced as secondaries during propagation Galaxy.
We have determined the momentum spectrum and charge ratio of muons in region from 250 MeV/c to 100 GeV/c using a superconducting magnetic spectrometer. The absolute differential obtained this experiment at 600 m above sea level is good agreement with previous measurements level. can be represented by power law varying index, which consistent zero below 450 steepens value −2.7 ± 0.1 between 20 GeV/c. integral flux measured span very large range excellent earlier results. positive negative...
Abstract Despite the significant progress achieved in recent years, physical mechanisms underlying origin of solar energetic particles (SEPs) are still a matter debate. The complex nature both particle acceleration and transport poses challenges to developing universal picture SEP events that encompasses low-energy (from tens keV few hundreds MeV) observations made by space-based instruments GeV detected worldwide network neutron monitors ground-level enhancements (GLEs). high-precision data...
Precise time-dependent measurements of the Z = 2 component in cosmic radiation provide crucial information about propagation charged particles through heliosphere. The PAMELA experiment, with its long flight duration (15th June 2006 - 23rd January 2016) and low energy threshold (80 MeV/n) is an ideal detector for ray solar modulation studies. In this paper, helium nuclei spectra measured by instrument from July to December 2009 over a Carrington rotation time basis are presented. A...
Abstract Time-dependent energy spectra of galactic cosmic rays (GCRs) carry fundamental information regarding their origin and propagation. When observed at the Earth, these are significantly affected by solar wind embedded magnetic field that permeates heliosphere, changing over an 11 yr cycle. Energy GCRs measured during different epochs activity provide crucial for a thorough understanding heliospheric phenomena. The PAMELA experiment collected data almost 10 years (2006 June 15–2016...
The GAMMA-400 gamma-ray telescope is designed to measure the fluxes of gamma rays and cosmic-ray electrons + positrons, which can be produced by annihilation or decay dark matter particles, as well survey celestial sphere in order study point extended sources rays, energy spectra Galactic extragalactic diffuse emission, bursts, emission from Sun. covers range 100 MeV 3000 GeV. Its angular resolution ~0.01 deg (E{\gamma} > GeV), ~1% 10 proton rejection factor ~10E6. will installed on Russian...
A new measurement of the momentum spectra both positive and negative muons as a function atmospheric depth was made by balloon-borne experiment CAPRICE94. The data were collected during ground runs in Lynn Lake on 19 20 July 1994 balloon flight 8 9 August 1994. We present results that cover intervals 0.3–40 GeV/c for μ− 0.3–2 μ+, depths from 3.3 to 1000 g/cm2, respectively. Good agreement is found with previous measurements high momenta, while at momenta below 1 we find latitude dependent...
Abstract The CALorimetric Electron Telescope primary detector (CALET-CAL) is a 30 radiation-length-deep hybrid calorimeter designed for the accurate measurement of high-energy cosmic rays. It capable triggering on and giving near complete containment electromagnetic showers from electrons gamma rays 1 GeV to over 10 TeV. first 24 months on-orbit scientific data (2015 November 01–2017 October 31) provide valuable characterization performance based analyses gamma-ray set in general bright...
The measurement of the atmospheric muon spectrum is currently great interest because study neutrinos and claim neutrino oscillations made in 1998 by Super-Kamiokande Collaboration. A flux an indirect measure flux. Therefore, it can be used to improve calculation flux, which turn compared with observed rates underground detectors. This article reports a new μ+ μ− spectra at several depths momentum ranges 0.3–20GeV/c 0.3–40GeV/c, respectively. data were collected balloon-borne experiment...
Abstract We present a study of the solar-cycle variations >80 MeV proton flux intensities in lower edge inner radiation belt, based on measurements Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics (PAMELA) mission. The analyzed data sample covers an ∼8 yr interval from 2006 July to 2014 September, thus spanning decaying phase 23rd solar cycle maximum 24th cycle. explored intensity temporal as function drift shell energy, also providing explicit investigation...
We report a new measurement of the momentum spectra both positive and negative muons as function atmospheric depth in range 0.3--2 $0.3--40\mathrm{GeV}/c$, respectively. The measured flux values have been compared with obtained from simulations, which were carried out to interpret neutrino data. find that our data disagree results simulations. ratio derived simulations is at largest 1.8 varies muon momentum.
We report new results for the cosmic-ray antiproton-to-proton ratio from 3 to 50 GeV at top of atmosphere. These represent first measurements, on an event-by-event basis, mass-resolved antiprotons above 18 GeV. The were obtained with NMSU-WIZARD/CAPRICE98 balloon-borne magnet spectrometer equipped a gas-RICH (Ring-Imaging Cerenkov) counter and silicon-tungsten imaging calorimeter. RICH detector was ever flown that is capable identifying charge-one particles energies 5 1998 May 28-29 Fort...