A5052107764- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Solar and Space Plasma Dynamics
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Radiation Therapy and Dosimetry
- Ionosphere and magnetosphere dynamics
- Atomic and Subatomic Physics Research
- Astro and Planetary Science
- Nuclear Physics and Applications
- CCD and CMOS Imaging Sensors
- X-ray Spectroscopy and Fluorescence Analysis
- Gamma-ray bursts and supernovae
- Muon and positron interactions and applications
- Geomagnetism and Paleomagnetism Studies
- Astrophysical Phenomena and Observations
- Atmospheric Ozone and Climate
- Pulsars and Gravitational Waves Research
- Medical Imaging Techniques and Applications
- Atomic and Molecular Physics
- Advanced X-ray and CT Imaging
- Scientific Research and Discoveries
- Solar Radiation and Photovoltaics
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2015-2024
University of Trieste
2015-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
2013-2024
Nello Carrara Institute of Applied Physics
2009-2024
Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
2024
Istituto Nazionale di Fisica Nucleare
2006-2023
Institute of High Energy Physics
2023
Chinese Academy of Sciences
2023
University of Chinese Academy of Sciences
2023
University of Hawaiʻi at Mānoa
2021-2022
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...
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...
Abstract We present an innovative charge detector with high resolution and wide dynamic range designed to fulfill the requirements of a monitoring system for energy ion beam. The prototype, constructed using Si photodiodes custom readout electronics, underwent extensive testing during HERD AMS beam tests at CERN SPS facilities. Initial showcased detector's exceptional performance, emphasizing both capable measuring nuclei atomic numbers ranging from 1 80. prototype's compatibility fast,...
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...
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...
ABSTRACT The cosmic-ray hydrogen and helium ( 1 H, 2 3 He, 4 He) isotopic composition has been measured with the satellite-borne experiment PAMELA , which was launched into low-Earth orbit on board Resurs-DK1 satellite 2006 June 15. rare isotopes H He in cosmic rays are believed to originate mainly from interaction of high-energy protons galactic interstellar medium. between 100 1100 MeV/n for 1400 using two different detector systems over 23rd solar minimum July 2007 December.
Abstract The FAMU experiment aims to measure for the first time hyperfine splitting of muonic hydrogen ground state. From this measurement proton Zemach radius can be derived and will shed light on determination charge radius. In paper, we describe scientific goal, method detailed preparatory work. This includes outcome preliminary measurements, subsequent refined simulations evaluation expected results. experimental setup being built performed at RAL laboratory muon facility is also described.
The existence of a significant flux antiprotons confined to Earth's magnetosphere has been considered in several theoretical works. These antiparticles are produced nuclear interactions energetic cosmic rays with the terrestrial atmosphere and accumulate geomagnetic field at altitudes hundred kilometers. A contribution from decay albedo antineutrons hypothesized analogy proton production by neutron decay, which constitutes main source trapped protons energies above some tens MeV. This Letter...