Spazio sociale, identità e fruizione urbana. Il caso del Casilino 23, in STRAPPA G, Studi sulla periferia est di Roma, 2012 Franco Angeli

SI tratta dei risultati di una ricerca sulla perfieria est di Roma condotta fra il 2010 e il 2011. Il case-study sul Casilino 23 aveva l'obiettivo di indagare il rapporto fra identità, spazio sociale e forme della fuizione urbana. I risultati mostrano significativi mutamenti nell'identità urbana di un quartiere periferico di Roma connessi a più ampi fenomeni di mutamento sociale inerenti il rapporto centro-periferia e le modifiche di struttura economico-sociale, culturali e intergerazionali che attraversano la società globale

The Readout System for the ALICE Zero Degree Calorimeters

ALICE at the CERN LHC will investigate the physics of strongly interacting matter at extreme energy densities where the formation of the Quark Gluon Plasma is expected. Its properties can be studied from observations like the production of mesons with charm and beauty quarks. These signals have to be studied as a function of energy density, which is determined by the centrality of collisions. One of the physics observables that is closely related with the centrality of the collision is the number of spectator nucleons that can be measured by the Zero Degree Calorimeters (ZDC). Having a direct geometric interpretation allows to extract the impact parameter with minimal model assumptions. This paper describes the readout system of the ZDC. The ZDC readout consists of a VME system with a ZDC Readout Card, a VME Processor, Discriminators, a ZDC Trigger Card, scalers, QDCs and TDCs. The system was successfully tested during the 2009 ALICE data taking and is currently operational at the LHC

Emission of forward neutrons by 158A GeV indium nuclei in collisions with Al, Cu, Sn and Pb

The cross sections of forward emission of one, two and three neutrons by 158A GeV In-115 nuclei in collisions with Al, Cu, Sn and Pb targets are reported. The measurements were performed in the framework of the ALICE-LUMI experiment at the SPS facility at CERN. Various corrections accounting for the absorption of beam nuclei and produced neutrons in target material and surrounding air were introduced. The corrected cross section data are compared with the predictions of the RELDIS model for electromagnetic fragmentation of In-115 in ultraperipheral collisions, as well as with the results of the abrasion ablation model for neutron emission in hadronic interactions. The measured neutron emission cross sections well agree with the RELDIS results, with the exception of In-Al collisions where the measured cross sections are larger compared to RELDIS. This is attributed to a relatively large contribution of hadronic fragmentation of In on Al target with respect to electromagnetic fragmentation, in contrast to similar measurements performed earlier with 30A GeV Pb-208 colliding with Al. (C) 2013 Elsevier B.V. All rights reserved