Entity

Time filter

Source Type


De Leo R.,University of Cagliari | De Leo R.,Complesso Universitario Of Monserrato
Differential Geometry and its Application | Year: 2011

In a recent paper D'Ambra et al. (2011) [2] we studied basic properties of partial immersions and partially free maps, a generalization of free maps introduced first by Gromov (1970) in [4]. In this short note we show how to build partially free maps out of partial immersions and use this fact to prove that the partially free maps in critical dimension introduced in Theorems 1.1-1.3 of D'Ambra et al. (2011) [2] for three important types of distributions can actually be built out of partial immersions. Finally, we show that the canonical contact structure on R2n+1 admits partial immersions in critical dimension for every n. © 2011 Elsevier B.V. Source


Cirrone G.A.P.,National Institute of Nuclear Physics, Italy | Cirrone G.A.P.,ASCR Institute of Physics Prague | Tramontana A.,National Institute of Nuclear Physics, Italy | Tramontana A.,University of Catania | And 25 more authors.
Journal of Instrumentation | Year: 2014

Thomson Spectrometers (TPs) are widely used for beam diagnostic as they provide simultaneous information on charge over mass ratio, energy and momentum of detected ions. A new TP design has been realized at INFN-LNS within the LILIA (Laser Induced Light Ion Acceleration) and ELIMED (MEDical application at ELI-Beamlines) projects. This paper reports on the construction details of the TP and on its experimental tests performed at PALS laboratory in Prague, with the ASTERIX IV laser system. Reported data are obtained with polyethylene and polyvinyl alcohol solid targets, they have been compared with data obtained from other detectors. Consistency among results confirms the correct functioning of the new TP. The main features, characterizing the design, are a wide acceptance of the deflection sector and a tunability of the, partially overlapping, magnetic and electric fields that allow to resolve ions with energy up to about 40 MeV for protons. © 2014 IOP Publishing Ltd and Sissa Medialab srl. Source


Tramontana A.,National Institute of Nuclear Physics, Italy | Tramontana A.,University of Catania | Anzalone A.,National Institute of Nuclear Physics, Italy | Candiano G.,National Institute of Nuclear Physics, Italy | And 25 more authors.
Journal of Instrumentation | Year: 2014

Laser accelerated proton beams represent nowadays an attractive alternative to the conventional ones and they have been proposed in different research fields. In particular, the interest has been focused in the possibility of replacing conventional accelerating machines with laser-based accelerators in order to develop a new concept of hadrontherapy facilities, which could result more compact and less expensive. With this background the ELIMED (ELIMED: ELI-Beamlines MEDical applications) research project has been launched by LNS-INFN researchers (Laboratori Nazionali del Sud-Istituto Nazionale di Fisica Nucleare, Catania, IT) and ASCR-FZU researchers (Academy of Sciences of the Czech Republic-Fyzikální ústar, Prague, Cz), within the pan-European ELI-Beamlines facility framework. Its main purposes are the demonstration of future applications in hadrontherapy of optically accelerated protons and the realization of a laser-accelerated ion transport beamline for multidisciplinary applications. Several challenges, starting from laser-target interaction and beam transport development, up to dosimetric and radiobiological issues, need to be overcome in order to reach the final goals. The design and the realization of a preliminary beam handling and dosimetric system and of an advanced spectrometer for high energy (multi-MeV) laser-accelerated ion beams will be shortly presented in this work. © 2014 IOP Publishing Ltd and Sissa Medialab srl. Source


Bedeschi F.,National Institute of Nuclear Physics, Italy | Cardini A.,Complesso Universitario Of Monserrato | Cascella M.,University of Salento | Ciapetti G.,University of Rome La Sapienza | And 16 more authors.
Journal of Instrumentation | Year: 2014

A small detector (6 radiation lenghts in total) divided into two sections of four times lead-quartz-scintillator tiles, each with a separate readout for Čerenkov and scintillation light has been tested. The results for high energy muons and electrons are presented. The measured erenkov light yield for electrons is about 50 Č.p.e. per deposited GeV. © CERN 2014 for the benefit of the RD52 DREAM collaboration. Source


Tramontana A.,National Institute of Nuclear Physics, Italy | Tramontana A.,University of Catania | Candiano G.,National Institute of Nuclear Physics, Italy | Carpinelli M.,University of Sassari | And 16 more authors.
Journal of Instrumentation | Year: 2014

ELI-Beamlines is one of the four pillars of the ELI (Extreme Light Infrastructure) pan-European project. It will be an ultrahigh-intensity, high repetition-rate, femtosecond laser facility whose main goals are the generation and applications of high-brightness X-ray sources and accelerated charged particles. In particular medical and multidisciplinary applications with laser-accelerated beams are treated by the ELIMED task force, a collaboration between different research institutes. A crucial goal for this network is represented by the design and the realization of a transport beamline able to provide ion beams with suitable characteristics in terms of energy spectrum and angular distribution in order to perform dosimetric tests and biological cell irradiations. A first prototype of transport beamline has been already designed and some magnetic elements are already under construction. In particular, an Energy Selector System (ESS) prototype has been already realized at LNS-INFN. This paper reports about the studies of the ESS properties as, for instance, energy spread and transmission efficiency, carried out using the GEANT4 Monte Carlo code. © 2014 IOP Publishing Ltd and Sissa Medialab srl. Source

Discover hidden collaborations