A5040569595- Dark Matter and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Radiation Therapy and Dosimetry
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- Atomic and Subatomic Physics Research
- Gamma-ray bursts and supernovae
- Nuclear Physics and Applications
- Atmospheric Ozone and Climate
- Radiation Detection and Scintillator Technologies
- Geomagnetism and Paleomagnetism Studies
- Solar Radiation and Photovoltaics
- Scientific Research and Discoveries
- Astronomy and Astrophysical Research
- Photocathodes and Microchannel Plates
- CCD and CMOS Imaging Sensors
- Geophysics and Gravity Measurements
- Spacecraft and Cryogenic Technologies
- Planetary Science and Exploration
- X-ray Spectroscopy and Fluorescence Analysis
- Cosmology and Gravitation Theories
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2015-2024
Istituto Nazionale di Fisica Nucleare
2001-2024
University of Trieste
2015-2024
University of Tübingen
2024
Institute of Space Sciences
2024
Consejo Superior de Investigaciones Científicas
2024
Moscow Engineering Physics Institute
2021-2024
Institute for Fundamental Physics of the Universe
2019-2023
University of California, Los Angeles
2023
Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
2017-2021
Protons and helium nuclei are the most abundant components of cosmic radiation. Precise measurements their fluxes needed to understand acceleration subsequent propagation rays in our Galaxy. We report precision proton spectra rigidity range 1 gigavolt 1.2 teravolts performed by satellite-borne experiment PAMELA (payload for antimatter matter exploration light-nuclei astrophysics). find that spectral shapes these two species different cannot be described well a single power law. These data...
The satellite-borne experiment PAMELA has been used to make a new measurement of the cosmic-ray antiproton flux and antiproton-to-proton ratio which extends previously published measurements down 60 MeV up 180 GeV in kinetic energy. During 850 days data acquisition approximately 1500 antiprotons were observed. are consistent with purely secondary production Galaxy. More precise models required for complete interpretation results.
A new measurement of the cosmic-ray antiproton-to-proton flux ratio between 1 and 100 GeV is presented. The results were obtained with PAMELA experiment, which was launched into low-Earth orbit on-board Resurs-DK1 satellite on June 15th 2006. During 500 days data collection a total about 1000 antiprotons have been identified, including above an energy 20 GeV. high-energy are tenfold improvement in statistics respect to all previously published data. follow trend expected from secondary...
Precision measurements of the electron component in cosmic radiation provide important information about origin and propagation rays Galaxy. Here we present new results regarding negatively charged electrons between 1 625 GeV performed by satellite-borne experiment PAMELA. This is first time that cosmic-ray have been identified above 50 GeV. The spectrum can be described with a single power law energy dependence spectral index -3.18 +- 0.05 region influenced solar wind (> 30 GeV). No...
Precision measurements of the positron component in cosmic radiation provide important information about propagation rays and nature particle sources our Galaxy. The satellite-borne experiment PAMELA has been used to make a new measurement cosmic-ray flux fraction that extends previously published up 300 GeV kinetic energy. combined energy spectrum unique tool constrain interpretation models. During recent solar minimum activity period from July 2006 December 2009 approximately 24500...
The energy spectra of galactic cosmic rays carry fundamental information regarding their origin and propagation. These spectra, when measured near Earth, are significantly affected by the solar magnetic field. A comprehensive description radiation must therefore include transport modulation inside heliosphere. During end last decade Sun underwent a peculiarly long quiet phase well suited to study processes. In this paper we present proton from July 2006 December 2009 PAMELA. large collected...
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 hydrogen nuclei (protons and deuterons) spectrum from 0.15 to 200 GeV helium over energy range 0.2 100 nucleon-1 at top of atmosphere measured by balloon-borne experiment Cosmic Antiparticle Ring-Imaging Cerenkov Experiment (CAPRICE), which was flown Lynn Lake, Manitoba, Canada, 1994 August 8-9. also proton 4.2 GeV. The used NMSU-WiZard/CAPRICE magnet spectrometer equipped with a solid radiator (RICH) detector silicon-tungsten calorimeter for particle identification. This...
Precision measurements of the electron component in cosmic radiation provide important information about origin and propagation rays Galaxy not accessible from study cosmic-ray nuclear components due to their differing diffusion energy-loss processes. However, when measured near Earth, effects modulation galactic heliosphere, particularly significant for energies up at least 30 GeV, must be properly taken into account. In this paper (e^-) spectra by PAMELA down 70 MeV July 2006 December 2009...
The propagation of cosmic rays inside our galaxy plays a fundamental role in shaping their injection spectra into those observed at Earth. One the best tools to investigate this issue is ratio fluxes for secondary and primary species. boron-to-carbon (B/C) ratio, particular, sensitive probe mechanisms. This paper presents new measurements absolute boron carbon nuclei, as well B/C from PAMELA space experiment. results span range 0.44 - 129 GeV/n kinetic energy data taken period July 2006 March 2008.
Precise measurements of the time-dependent intensity low energy ($<50$ GeV) galactic cosmic rays are fundamental to test and improve models which describe their propagation inside heliosphere. Especially, data spanning different solar activity periods, i.e. from minimum maximum, needed achieve comprehensive understanding such physical phenomenon. The phase between 23$^{rd}$ 24$^{th}$ cycles was peculiarly long, extending up beginning 2010 followed by maximum phase, reached during early 2014....
The precise measurement of cosmic-ray antinuclei serves as an important means for identifying the nature dark matter and other new astrophysical phenomena, could be used with species to understand production propagation in Galaxy. For instance, low-energy antideuterons would provide a "smoking gun" signature annihilation or decay, essentially free background. Studies recent years have emphasized that models must considered together abundant cosmic antiprotons any potential observation...
We report on a new measurement of the cosmic ray antiproton spectrum. The data were collected by balloon-borne experiment CAPRICE98, which was flown 1998 May 28-29 from Fort Sumner, New Mexico. used NMSU-WiZard/CAPRICE98 magnet spectrometer equipped with gas Ring Imaging Cherenkov (RICH) detector, time-of-flight system, tracking device consisting drift chambers and superconducting magnet, silicon-tungsten calorimeter. RICH detector first ever capable mass-resolving charge-one particles at...
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...
We present the space spectrometer PAMELA observations of proton and helium fluxes during December 13 14, 2006 solar particle events. This is first direct measurement energetic particles in with a single instrument energy range from $\sim$ 80 MeV/n up to 3 GeV/n. In event measured spectra protons were compared results obtained by neutron monitors other detectors. Our measurements show spectral behaviour different those derived monitor network. No satisfactory analytical fitting was found for...
The last solar minimum activity period, and the consequent modulation conditions for cosmic rays, was unusual. highest levels of Galactic protons were recorded at Earth in late 2009 contrast to expectations. A comprehensive model used study proton period from 2006 order determine what basic processes responsible during this why it differs previous periods. This established is now applied studying electron spectra as observed 80 MeV–30 GeV by PAMELA space detector mid-2006 end 2009. Over...
Cosmic-ray electrons and positrons are a unique probe of the propagation cosmic rays as well nature distribution particle sources in our Galaxy. Recent measurements these particles challenging basic understanding mechanisms production, acceleration, rays. Particularly striking differences between low energy results collected by space-borne PAMELA AMS-02 experiments older pointing to sign-charge dependence solar modulation cosmic-ray spectra. The experiment has been measuring time variation...