- Since 2017 Andrea Vacchi is Extraordinary Professor at the University of Udine. In 1990 after 13 years of research ac... moreSince 2017 Andrea Vacchi is Extraordinary Professor at the University of Udine. In 1990 after 13 years of research activity at ETH in Zurich (CH), at CERN in Geneva (CH) and at the Rockefeller University NY (USA), he returned to Italy. Since then the INFN represents the backbone of his work as a experimental physicist and in the central management for the coordination of research activities. Determinatedly addressing the high quality of the scientific objectives, and the consequent development of dedicated advanced technologies, he constantly kept developing means to facilitate the relative industrial applications also giving rise to the birth of new entities dedicated to this scope (Technology Transfer Board) and internal regulations (Spin-off and intellectual property), within the Institute. As a member of the Executive board and Chair of the national board for financing technological Redit
Muonic hydrogen (μp) is a very sensitive probe of the proton structure. Laser spectroscopy of two 2S‐2P transitions in μp was used to determine both the Lamb shift and the hyperfine splitting of the 2S state in μp. The rms charge radius... more
Muonic hydrogen (μp) is a very sensitive probe of the proton structure. Laser spectroscopy of two 2S‐2P transitions in μp was used to determine both the Lamb shift and the hyperfine splitting of the 2S state in μp. The rms charge radius of the proton, fm, was extracted from the Lamb shift. The Zemach radius of the proton, fm, was obtained from the 2S‐hyperfine splitting. This article summarizes the previously published findings.
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ALICE is a general-purpose heavy-ion experiment designed to study the physics of strongly interacting matter and the quark-gluon plasma in nucleus-nucleus collisions at the LHC. It currently includes more than 900 physicists and senior... more
ALICE is a general-purpose heavy-ion experiment designed to study the physics of strongly interacting matter and the quark-gluon plasma in nucleus-nucleus collisions at the LHC. It currently includes more than 900 physicists and senior engineers, from both nuclear and high-energy physics, from about 80 institutions in 28 countries. The experiment was approved in February 1997. The detailed design of the different detector systems has been laid down in a number of Technical Design Reports issued between mid-1998 and the end of 2001 and construction has started for most detectors. Since the last comprehensive information on detector and physics performance was published in the ALICE Technical Proposal in 1996, the detector as well as simulation, reconstruction and analysis software have undergone significant development. The Physics Performance Report (PPR) will give an updated and comprehensive summary of the current status and performance of the various ALICE subsystems, including updates to the Technical Design Reports, where appropriate, as well as a description of systems which have not been published in a Technical Design Report. The PPR will be published in two volumes. The current Volume I contains: a short theoretical overview and an extensive reference list concerning the physics topics of interest to ALICE, relevant experimental conditions at the LHC, a short summary and update of the subsystem designs, and a description of the offline framework and Monte Carlo generators. Volume II, which will be published separately, will contain detailed simulations of combined detector performance, event reconstruction, and analysis of a representative sample of relevant physics observables from global event characteristics to hard processes.
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Page 1. Performance of the PAMELA Si-W Imaging Calorimeter in Space ... Voronov 7 , YT Yurkin 7 , VG Zverev 7 , G Barbarino 8 , G De Rosa 8 , G Osteria 8 , D Campana 8 , M Casolino 9 , MP De Pascale 9 , V Malvezzi 9 , L Marcelli 9 , M... more
Page 1. Performance of the PAMELA Si-W Imaging Calorimeter in Space ... Voronov 7 , YT Yurkin 7 , VG Zverev 7 , G Barbarino 8 , G De Rosa 8 , G Osteria 8 , D Campana 8 , M Casolino 9 , MP De Pascale 9 , V Malvezzi 9 , L Marcelli 9 , M Minori 9 , P ...
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The objectives and problems of a joint Russian-Italian project on satellite investigation of cosmic ray antiparticles are presented. The main experiments, concepts of the instrument design, and expected results are described. The program... more
The objectives and problems of a joint Russian-Italian project on satellite investigation of cosmic ray antiparticles are presented. The main experiments, concepts of the instrument design, and expected results are described. The program is scheduled for the next decade and is open to participation by other teams.
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A novel linear silicon drift detector (SDD) is proposed in which the proper potential profile is established by the voltage drop along a unique p+ cathode implanted across the surfaces. This p+ implant, arranged in a zigzag shape, acts at... more
A novel linear silicon drift detector (SDD) is proposed in which the proper potential profile is established by the voltage drop along a unique p+ cathode implanted across the surfaces. This p+ implant, arranged in a zigzag shape, acts at the same time as voltage divider and field cathode and allows us to increase the sensitive area, improving also the
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... S. BORISOV, N. DE SIMONE, V. DI FELICE, NN NIKONOV, F. PALMA, P. PICOZZA and R. SPARVOLI INFN, Sezione di Roma Tor Vergata, Via della ... R. BELLOTTI, A. BRUNO, and A. MONACO INFN, Sezione di Bari, Via Amendola 173, I70126 Bari,... more
... S. BORISOV, N. DE SIMONE, V. DI FELICE, NN NIKONOV, F. PALMA, P. PICOZZA and R. SPARVOLI INFN, Sezione di Roma Tor Vergata, Via della ... R. BELLOTTI, A. BRUNO, and A. MONACO INFN, Sezione di Bari, Via Amendola 173, I70126 Bari, Italy and University of Bari ...
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The PAMELA equipment will be assembled in 2001 and installed on board the Russian satellite Resurs. PAMELA is conceived mainly to study the antiproton and positron fluxes in cosmic rays up to high energy (190 GeV for and 270 GeV for e+)... more
The PAMELA equipment will be assembled in 2001 and installed on board the Russian satellite Resurs. PAMELA is conceived mainly to study the antiproton and positron fluxes in cosmic rays up to high energy (190 GeV for and 270 GeV for e+) and to search antinuclei, up to 30 GeV/n, with a sensitivity of 10−7 in the ratio. The PAMELA telescope consists of: a magnetic spectrometer made up of a permanent magnet system equipped with double sided microstrip silicon detectors; a transition radiation detector made up of active layers of proportional straw tubes interleaved with carbon fibre radiators; and a silicon–tungsten imaging calorimeter made up of layers of tungsten absorbers and silicon detector planes. A time-of-flight system and anti-coincidence counters complete the PAMELA equipment. In the past years, tests have been done on each subdetector of PAMELA; the main results are presented and their implications on the anti-particles identification capability in cosmic rays are discussed ...
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The PAMELA experiment is being conducted on board the RESURS DK1 satellite, launched into a near-Earth, near-polar orbit with an altitude of 350–610 km and an inclination of 70° on June 15, 2006. The apparatus comprises a magnetic... more
The PAMELA experiment is being conducted on board the RESURS DK1 satellite, launched into a near-Earth, near-polar orbit with an altitude of 350–610 km and an inclination of 70° on June 15, 2006. The apparatus comprises a magnetic spectrometer, an electromagnetic calorimeter (16X 0), a time-of-flight system, a neutron detector, an anticoincidence system, and a shower tail scintillator. It allows
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The 15th of June 2006, the PAMELA satellite-borne experiment was launched from the Baikonur cosmodrome and it has been collecting data since July 2006. The apparatus comprises a time-of-flight system, a silicon-microstrip magnetic... more
The 15th of June 2006, the PAMELA satellite-borne experiment was launched from the Baikonur cosmodrome and it has been collecting data since July 2006. The apparatus comprises a time-of-flight system, a silicon-microstrip magnetic spectrometer, a silicon–tungsten electromagnetic calorimeter, an anticoincidence system, a shower tail counter scintillator and a neutron detector. The combination of these devices allows precision studies of the
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The PAMELA satellite experiment was launched into low earth orbit on June 15th 2006. The combination of a permanent magnet silicon strip spectrometer and a silicon-tungsten imaging calorimeter allows precision studies of the charged... more
The PAMELA satellite experiment was launched into low earth orbit on June 15th 2006. The combination of a permanent magnet silicon strip spectrometer and a silicon-tungsten imaging calorimeter allows precision studies of the charged cosmic radiation to be conducted over a wide energy range (100 MeV - several hundred GeV). A primary scientific goal is to search for dark matter
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About one hundred years ago cosmic rays (CR) offered a means to study physical processes at energies exceeding by more than three orders of magnitude those available from natural radioactivity. The structure of the nucleus could be... more
About one hundred years ago cosmic rays (CR) offered a means to study physical processes at energies exceeding by more than three orders of magnitude those available from natural radioactivity. The structure of the nucleus could be investigated, mesons were discovered ...
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The CAPRICE98 balloon-borne experiment was flown on 28-29 May 1998 from Fort Sumner, New Mexico, USA. The detector configuration included the NMSUWiZard/CAPRICE magnetic spectrometer equipped with a gas RICH detector, a silicon-tungsten... more
The CAPRICE98 balloon-borne experiment was flown on 28-29 May 1998 from Fort Sumner, New Mexico, USA. The detector configuration included the NMSUWiZard/CAPRICE magnetic spectrometer equipped with a gas RICH detector, a silicon-tungsten calorimeter ...
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PAMELA is a satellite-borne experiment designed to study with great accuracy charged particles in the cosmic radiation with a particular focus on antiparticles. The experiment, housed on board the Russian Resurs-DK1 satellite, was... more
PAMELA is a satellite-borne experiment designed to study with great accuracy charged particles in the cosmic radiation with a particular focus on antiparticles. The experiment, housed on board the Russian Resurs-DK1 satellite, was launched on June 15, 2006 in a View the MathML ...
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The Pamela apparatus will allow precise measurements of cosmic rays in Low Earth Orbit, mainly focusing on the antiparticles component. The apparatus is now ready for flight, and the launch is foreseen during June 2006. The paper briefly... more
The Pamela apparatus will allow precise measurements of cosmic rays in Low Earth Orbit, mainly focusing on the antiparticles component. The apparatus is now ready for flight, and the launch is foreseen during June 2006. The paper briefly reports the status of the experiment, and the performances of the various components as measured before the launch.
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A trace gas sensor based on pulsed cavity ring-down spectroscopy (CRDS) was developed for measurement of the ν4 fundamental vibrational band of ammonia (NH3) centered at 1468.898 cm−1. A pulsed distributed feedback quantum cascade laser... more
A trace gas sensor based on pulsed cavity ring-down spectroscopy (CRDS) was developed for measurement of the ν4 fundamental vibrational band of ammonia (NH3) centered at 1468.898 cm−1. A pulsed distributed feedback quantum cascade laser (DFB-QCL) operating at 6.8 µm (1470.58 cm−1) quite well covered the absorption band of the ammonia and strong fundamental vibrational absorption bands of different molecular gases in this unexplored region. The cavity was partially evacuated down to 0.4 Atm by a turbo-molecular pump to reduce the partial interference between the NH3 spectra and water near the absorption peak of ammonia. A sensitivity of nine parts per billion was reached for a measurement time of 120 s as well as an optical path length of 226 m. The device demonstrated high spectral performance and versatility due to its wide tuning range, narrow linewidth, and comparatively high-energy mid-IR radiation in the relatively unexplored 6.8 µm region, which is very important for high-reso...
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We present here a concept for a light and low-power wide field monitor working in the X-ray range, suitable for simultaneous imaging of large portions of the sky and GRB localizations. Our concept evolves from and improves on the design... more
We present here a concept for a light and low-power wide field monitor working in the X-ray range, suitable for simultaneous imaging of large portions of the sky and GRB localizations. Our concept evolves from and improves on the design of the 5-kg SuperAGILE experiment, flying on the AGILE mission and currently delivering arcmin-localizations of GRBs at a rate of
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The Silicon Drift Detectors (SDDs) provide, through the measurement of the drift time of the charge deposited by the particle which crosses the detector, information on the impact point and on the energy deposition. The foreseen readout... more
The Silicon Drift Detectors (SDDs) provide, through the measurement of the drift time of the charge deposited by the particle which crosses the detector, information on the impact point and on the energy deposition. The foreseen readout scheme is based on a single chip implementation of an integrated circuit that includes low-noise amplification, fast analog storage and analog to digital
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The ALTEA project studies the problems related to possible functional damage to the Central Nervous System (CNS) due to particle radiation in space environment. The project is a large international and multi-disciplinary collaboration.... more
The ALTEA project studies the problems related to possible functional damage to the Central Nervous System (CNS) due to particle radiation in space environment. The project is a large international and multi-disciplinary collaboration. The ALTEA instrumentation is an helmet-shaped multi-sensor device that will measure concurrently the dynamics of the functional status of the visual system and the passage of each particle through the brain within a pre-determined energy window. ALTEA is scheduled to fly in the International Space Station in February 2003. One part of the multi-sensor device, one of the advanced silicon telescopes, will be launched in the ISS in early 2002 and serve as test for the final device and as discriminating dosimeter for the particle fluences within the ISS.