A5034915769- Solar and Space Plasma Dynamics
- Dark Matter and Cosmic Phenomena
- Atmospheric Ozone and Climate
- Ionosphere and magnetosphere dynamics
- Astrophysics and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Radiation Therapy and Dosimetry
- Atomic and Molecular Physics
- Astronomy and Astrophysical Research
- Solar Radiation and Photovoltaics
- Photocathodes and Microchannel Plates
- Particle Detector Development and Performance
- Neutrino Physics Research
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Mechanics and Applications
- Advanced Chemical Physics Studies
North-West University
2014-2022
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2017-2021
University of Trieste
2017-2021
Istituto Nazionale di Fisica Nucleare, Roma Tor Vergata
2017-2021
University of Rome Tor Vergata
2021
Institute for Fundamental Physics of the Universe
2021
Fachhochschule Kiel
2021
Agenzia Spaziale Italiana
2017
Abstract The local interstellar spectra (LISs) for galactic cosmic rays (CRs) cannot be directly observed at the Earth below certain energies, because of solar modulation in heliosphere. With Voyager 1 crossing heliopause 2012, situ experimental LIS data 100 MeV/nuc can now constrain computed CR spectra. Using propagation models, electron, proton, and light nuclei more reliably as LISs. observations made beyond heliopause, by PAMELA experiment orbit 2009 minimum, constraints, we...
Heliospheric modulation conditions were unusually quite during the last solar minimum activity between Solar Cycles 23/24. Fortunately, PAMELA space-experiment measured six-month averaged Galactic positron spectra for period July 2006 to December 2009, over an energy range of 80 MeV 30 GeV, which is important modulation. The highest level positrons was observed at Earth July-December 2009 period. A well-established, comprehensive three-dimensional (3D) numerical model applied study spectra....
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 Simultaneous and continuous observations of galactic cosmic-ray electrons ( e − ) positrons + from the PAMELA AMS02 space experiments are most suitable for numerical modeling studies heliospheric modulation these particles below 50 GeV. A well-established comprehensive three-dimensional model is applied to compute full spectra with purpose reproducing observed ratio / a period that covers previous long unusual deep solar minimum activity recent maximum phase, including polarity...
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...
Cosmic-ray observations made by the Voyager 1 spacecraft outside dominant modulating influence of heliosphere finally allow comparison computed galactic spectra with experimental data at lower energies. These spectra, based on propagation models, can now be compared low energies and high PAMELA space detector Earth. This improves understanding basic effects also provides solar modulation studies reliable input from MeV to 100 GeV. We set out reproduce electron in energy range 6–60 MeV, as...
Global modulation studies with comprehensive numerical models contribute meaningfully to the refinement of very local interstellar spectra (VLISs) for cosmic rays. Modulation positrons and anti-protons are investigated establish how ratio their intensity, respect electrons protons, changing solar activity. This includes polarity reversal magnetic field which creates a 22-year cycle. Modeling illustrates they modulated over time particle drift experience is significant at lower kinetic...
The observation of cosmic ray Helium isotopes at the Earth had been done precisely with PAMELA and AMS02 space detectors reported from July 2006 to December 2007 May 2011 April 2017, respectively. These available observations span time frames that include solar magnetic field reversal epoch. In this work, a comprehensive, threedimensional numerical modulation model for transport rays in heliosphere is utilized compute galactic minimum activity previous A < 0 cycle, through maximum, toward...
The space-borne PAMELA experiment was launched on the 15th June 2006 board Russian satellite Resurs-DK1 from Baikonur cosmodrome. From beginning performed high-precision measurements of cosmic rays over a wide energy range until January 2016. Owing to its long-duration operation, had turned out be an optimal detecting apparatus for studies solar modulation time. collaboration has already published time-dependent proton, helium and electron spectra as well positron ratio ten years data. These...
A comprehensive, three-dimensional drift model is used to study the solar modulation of cosmic-ray protons and particularly anti-protons. Spectra for anti-protons from 10 MeV 70 GeV are computed based on revisited local interstellar spectra these particles. This done a complete cycle 2006 2017, which includes prolonged deep minimum period 2006--2009 magnetic polarity reversal Oct 2012 April 2014. The highlights differences between particles addresses level particle drifts that required...
The solutions of a comprehensive three-dimensional drift model are compared to $PAMELA$ and $AMS$-02 spectra electrons positrons in order describe understand their different modulation down 1 MeV. This is based on newly constructed very local interstellar spectra. focus the study full solar cycle, period from 2006 2017. Comparison observations modeling provides insight into how three major diffusion coefficients change during complete especially prolonged minimum polarity reversal magnetic...
The satellite-borne PAMELA experiment was launched on the 15th June 2006 from Baikonur cosmodrome. Since then and until January 2016 made high-precision measurements of charged component cosmic-rays over a wide energy range. Because its long-duration operation, represents an ideal detector for cosmic-ray solar modulation studies. collaboration already published time-dependent proton, helium electron spectra as well positron to ratio ten years data taking. These results are fundamental...
Supernova remnants are most probably the sources of bulk Galactic cosmic rays. Full 3D time dependent calculations propagation rays (CRs) have shown that if CRs indeed originate from supernova remnants, transient point-like sources, flux CR primary component measured at Earth depends strongly on local source history, whereas secondary shows only little or no variations due to nearby sources. The widely used steady state, rotational symmetric models (2D) cannot take into account but rather...
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-year cycle. Energy GCRs measured during different epochs activity provide crucial for a thorough understanding heliospheric phenomena. The PAMELA experiment had collected data almost ten years (15 June 2006 - 23...
Since the beginning of space exploration era, solar activity was observed at its lowest level during 2006 to 2009. During this period, PAMELA experiment spectra for galactic cosmic rays, specifically protons, electrons and positrons over a wide energy range, what is called an A < 0 magnetic polarity cycle. Drift theory predicts difference in behaviour these oppositely charge particles cycles. An opportunity thus created study predicted charge-sign-dependent modulation, also now very quiet...
Since the beginning of space exploration era, solar activity was observed at its lowest level during 2006 to 2009. During this period, PAMELA experiment spectra for galactic cosmic rays, specifically protons, electrons and positrons over a wide energy range, what is called an A < 0 magnetic polarity cycle. Drift theory predicts difference in behaviour these oppositely charge particles cycles. An opportunity thus created study predicted charge-sign-dependent modulation, also now very quiet...
Precision measurements of the Z = 2 component in cosmic radiation provide crucial information about origin and propagation second most abundant ray species Galaxy (9% total). These measurements, acquired with PAMELA space experiment orbiting Earth, allow to study solar modulation details. Helium is compared protons possible dependencies on charge mass. The time dependence helium fluxes a monthly basis measured by has been studied for period between July 2006 January 2016 energy range from...
A comprehensive three-dimensional (3D) numerical drift model is used to compute the modulation of cosmic ray protons and anti-protons in heliosphere. This done using latest development deriving diffusion coefficients interstellar spectra. Emphasis placed on effects spatial dependence scattering parameter, ωτ, with ω gyro-frequency τ a time scale defined by diffusive scattering, coefficient mentioned species. comparison modelling ratio obtained from different scenarios ωτ made over solar...
The PAMELA experiment had operated almost ten years on board of the Resurs DK1 satellite. satellite was launched 15$^{th}$ June 2006 and placed in orbit with an inclination 70° altitude 350 to 610 km. continuously measured electron positron fluxes Galactic cosmic rays a wide energy range from about 50 MeV hundreds GeV. spectra electrons %and positrons have been analysed end 23$^{rd}$ until beginning 24$^{th}$ solar cycle including prolonged deep minimum period 2009 magnetic polarity reversal...
In recent years, several new measurements of the antiproton component cosmic radiation became available. These significantly improved existing statistics extending explored energy region from few tens MeV up to hundreds GeV. are particularly relevant understand propagation rays in Galaxy and investigate nature dark matter. However, an unambiguous interpretation experimental data requires a proper reconstruction Local Interstellar Spectrum cosmic-ray antiprotons. Since performed inside...