Leandro Silveri
A5023224897- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Astrophysics and Cosmic Phenomena
- Radiation Therapy and Dosimetry
- Solar and Space Plasma Dynamics
- Particle physics theoretical and experimental studies
- Radiation Detection and Scintillator Technologies
- Neutrino Physics Research
- High-Energy Particle Collisions Research
- Ionosphere and magnetosphere dynamics
- Atmospheric Ozone and Climate
- Spacecraft and Cryogenic Technologies
- Nuclear Physics and Applications
- Planetary Science and Exploration
- Digital Radiography and Breast Imaging
- Cosmology and Gravitation Theories
- Earthquake Detection and Analysis
- Spacecraft Design and Technology
Gran Sasso Science Institute
2021-2025
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Gran Sasso
2021-2025
Istituto Nazionale di Fisica Nucleare
2021-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Pavia
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Lecce
2022-2023
University of Geneva
2021-2023
University of Salento
2022-2023
Polytechnic University of Bari
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
2023
University of Palermo
2021-2023
The measurement of the energy spectrum cosmic ray helium nuclei from 70 GeV to 80 TeV using 4.5 years data recorded by Dark Matter Particle Explorer (DAMPE) is reported in this work. A hardening observed at an about 1.3 TeV, similar previous observations. In addition, a spectral softening 34 revealed for first time with large statistics and well controlled systematic uncertainties, overall significance 4.3σ. DAMPE measurements both protons suggest particle charge dependent energy, although...
Recent observations of the light component cosmic-ray spectrum have revealed unexpected features that motivate further and more precise measurements up to highest energies. The Dark Matter Particle Explorer is a satellite-based experiment has been operational since December 2015, continuously collecting data on high-energy cosmic particles with very good statistics, energy resolution, particle identification capabilities. In this work, latest proton+helium in range from 46 GeV 464 TeV are...
Precise direct cosmic-ray (CR) measurements provide an important probe to study the energetic particle sources in our Galaxy, and interstellar environment through which these particles propagate. Uncertainties on hadronic models, ion-nucleon cross sections particular, are currently limiting factor toward obtaining more accurate CR ion flux with calorimetric space-based experiments. We present energy-dependent measurement of inelastic section protons helium-4 nuclei (alpha particles) a...
Recent observations of the light component cosmic-ray spectrum have revealed unexpected features that motivate further and more precise measurements up to highest energies. The Dark Matter Particle Explorer is a satellite-based experiment has been operational since December 2015, continuously collecting data on high-energy cosmic particles with very good statistics, energy resolution, particle identification capabilities. In this work, latest proton+helium in range from 46 GeV 464 TeV are...
Abstract The Forbush decrease (FD) represents the rapid of intensities charged particles accompanied with coronal mass ejections or high-speed streams from holes. It has been mainly explored ground-based neutron monitor network, which indirectly measures integrated all species cosmic rays by counting secondary neutrons produced interaction between atmospheric atoms and rays. space-based experiments can resolve but energy ranges are limited relatively small acceptances except for most...
The High Energy cosmic–Radiation (HERD) detector is one of the prominent space-borne instruments to be installed on-board Chinese Space Station (CSS), around 2027. Primary scientific goals regarding this initiative include: precise measurements cosmic ray (CR) energy spectra and mass composition, at energies up PeV range; contributions high gamma–ray astronomy transient studies; as well indirect searches for Dark Matter (DM) particles via their possible annihilation/decay detectable...
In this paper we will introduce the Terzina instrument, which is one of two scientific payloads NUSES satellite mission. serves as a technological pathfinder, hosting suite innovative instruments designed for in-orbit detection cosmic rays, neutrinos, and gamma rays across various energy ranges. The instrument itself compact telescope equipped with Schmidt-Cassegrain optics. Its primary objective to detect Cherenkov radiation emitted by Extensive Air Showers generated interaction high-energy...
The DArk Matter Particle Explorer (DAMPE) is a satellite-borne experiment, in operation since 2015, aimed at studying cosmic rays and high-energy gamma rays. Proton helium are the first- second-most abundant components Given their smaller interaction cross sections with interstellar medium, compared to heavier nuclei, they can travel larger distances, thereby becoming important probes cosmic-ray sources as well acceleration propagation mechanisms. Recently, DAMPE collaboration, machine...
The High Energy cosmic-Radiation Detection (HERD) facility has been proposed as a main space astronomy payload onboard the China Space Station, with aim of detecting cosmic rays (CRs) up to few PeV and gamma-rays greater than 100 MeV. instrument is designed accept incident particles from its top four lateral sides. Owing pioneering design, more one order magnitude increase in geometric acceptance foreseen, respect previous ongoing cosmic-ray experiments. Plastic Scintillator Detector (PSD)...
The DArk Matter Particle Explorer (DAMPE) is a space-borne high-energy particle detector launched on 17 December 2015. It can observe the $\gamma$-ray sky from $\sim 2$ GeV to 10 TeV with acceptance at most $1800~\rm cm^2\,sr$. With over 7.5 years of continuous operation, DAMPE has surveyed whole for about 15 times and collected more than 300,000 candidate photon events. In last few years, understanding payload been improved instrumental response functions have calibrated on-board data....
The High Energy cosmic-Radiation Detection (HERD) facility has been proposed as a space astronomy payload onboard the future China's Space Station. HERD is planned for operation starting around 2027 about 10 years In addition to unprecedented sensitivity dark matter searches and cosmic-ray measurements up knee energy, it should perform gamma-ray monitoring full sky survey from few hundred si{MeV} tens of si{TeV}. We present first study performance obtained with simulations whole detector...
More than a century after the performance of oil drop experiment, possible existence fractionally charged particles FCP still remains unsettled. The search for FCPs is crucial some extensions Standard Model in particle physics. Most previously conducted searches cosmic rays were based on experiments underground or at high altitudes. However, there have been few carried out orbit other AMS-01 flown by space shuttle and BESS balloon top atmosphere. In this study, we conduct an on-orbit data...
The space-based DAMPE (DArk Matter Particle Explorer) particle detector has been taking data for more than 7 years since its successful launch in December 2015. Its main scientific goals include the indirect search dark matter signatures cosmic lepton and gamma-ray spectra, study of galactic rays up to energies hundreds TeV studies on highenergy gamma ray astronomy. measurement spectra are reported here, those being fundamental tools investigate mechanisms acceleration at their sources...
Thanks to its large calorimeter, the DArk Matter Particle Explorer (DAMPE) satellite experiment is ideally suited for direct detection of cosmic rays (CRs) up knee. At these TeV PeV energies, main uncertainty on CR flux measurements comes from hadronic cross sections, which are largely experimentally unconstrained. We developed novel machine learning (ML) tools that able probe depth at CRs inelastically interact inside DAMPE experiment. Applying techniques 7 years data, and comparing results...
The Zirè experiment is part of the NUSES (NeUtrino and Seismic Electromagnetic Signals) space mission, proposed by Gran Sasso Science Institute (GSSI) in collaboration with Istituto Nazionale di Fisica Nucleare (INFN) Thales Alenia Space Italy (TAS-I), involving many Institutes Universities from Europe abroad. will perform measurements electrons, protons light nuclei few up to hundreds MeVs, for study low energy CRs, weather phenomena possible Magnetosphere-Litosphere-Ionosphere Coupling...
The High Energy cosmic-Radiation Detection (HERD) facility onboard the Chinese Space Station will provide high quality data on charged cosmic rays from few GeV to PeV energies and gamma above 100 MeV. HERD employ a Plastic Scintillator Detector (PSD) discriminate neutral particles help identify measure nuclei charge up iron. For these reasons, PSD needs have detection efficiency ($\sim99.998\%$) good resolution ($\sim30\%$ at low $Z$). During 2022 2023, beam test campaigns were performed...
The DArk Matter Particle Explorer (DAMPE) is a high-energy cosmic ray and gamma-ray detector located in space. Over period of seven years since its launch on December 17, 2015, DAMPE has surveyed the entire sky collected an extensive dataset more than 300,000 photons with energies above 2 GeV. To analyze data obtained by DAMPE, instrument response functions (IRFs) have been derived, specialized software called DmpST developed. In this context, we present results point-like source catalog....
The DArk Matter Particle Explorer (DAMPE), a space-based high energy particle detector, has been operated on-orbit for more than five years. large geometric factor and good charge resolution enable DAMPE to have very potential measure cosmic-rays up 100 TeV. Knowledge of the boron carbon (B/C) flux ratio is important in understanding prop- agation cosmic rays, especially TeV range. In this contribution, latest progress B/C analysis based on flight data collected by during 5 years operation,...
Satellite experiments employ plastic scintillators to discriminate charged from neutral particles and identify nuclei. We have assembled tested a prototype of Plastic Scintillator Detector (PSD) equipped with Silicon Photomultipliers (SiPMs) for the High Energy Cosmic Radiation Detection facility (HERD) that will be installed onboard future Chinese Space Station (CSS). The HERD experiment provide high quality data on cosmic rays up PeV energies gamma above 100 MeV energies. In order explore...
Boron nuclei in cosmic rays (CRs) are believed to be mainly produced by the fragmentation of heavier nuclei, such as carbon and oxygen, via collisions with interstellar matter. Therefore, boron-to-carbon flux ratio (B/C) boron-to-oxygen (B/O) very essential probes CR propagation. With a large geometric factor good charge resolution, DArk Matter Particle Explorer (DAMPE), is expected extend measurement B/C B/O up few TeV/n energies. In this contribution, direct measurements energy range from...
DAMPE (DArk Matter Particle Explorer) is a space-based particle detector that has been continuously taking data since its successful launch in December 2015. Its primary scientific goals include the indirect search of dark matter, study galactic cosmic rays with energy from few tens GeV up to hundreds TeV and high-energy gamma-ray astronomy. Spectral measurements secondary nuclei such as lithium, beryllium boron ratios fluxes are fundamental improve our understanding ray acceleration...
The DArk Matter Particle Explorer (DAMPE), a space-based high-energy particle detector, has been operated in orbit for more than seven years. Thanks to its large geometric factor, good charge resolution and wide dynamic range energy measurements, DAMPE can provide valuable insights into the spectra of cosmic ray carbon oxygen up tens TeV/n. These measurements are fundamental better understanding origin, acceleration mechanism propagation rays Galaxy. In this paper, we present latest progress...
The DArk Matter Particle Explorer (DAMPE) space mission is designed to measure cosmic rays and gamma rays. key sub-detector of DAMPE the Bismuth Germanium Oxide (BGO) Electromagnetic CALorimeter (ECAL), which measures energies electrons/gamma-rays ranging from 5 GeV - 10 TeV. fluorescence quenching effect has been observed for hadronic shower in sensitive unit BGO ECAL, cases yield no longer proportional deposited energies. However, it still unclear whether there a ECAL ~TeV electromagnetic...