18 Set 2008 JLab12.0 JLab e CEBAF JLab12 Prima Riunione Plenaria 18 Settembre m 5 Recirculation Arcs 0.6 GeV Linac Extraction element End Stations 0.6 GeV Linac 45 MeV Injector Central Helium Liquefier Energy : GeV Max current : 200  A Polarization : ~80 % Simultaneous delivery to 3 Halls

18 Set 2008 JLab12.0 Jefferson Lab

18 Set 2008 JLab12.0 Linac Arc 3 End Stations

18 Set 2008 JLab12.0 Hall A: Two High Resolution (10 -4 ) Spectrometers L [cm -2 s -1 ] = 10 39

18 Set 2008 JLab12.0 Hall B: The CEBAF Large Acceptance Spectrometer (CLAS) L [cm -2 s -1 ] = 10 34

18 Set 2008 JLab12.0 Hall C: A High Momentum and a Broad Range Spectrometer L [cm -2 s -1 ] = 10 39

18 Set 2008 JLab GeV CEBAF Two 0.6 GV linacs 1.1 CHL-2 Upgrade magnets and power supplies Enhanced capabilities in existing Halls Lower pass beam energies still available ~ $310 M

18 Set 2008 JLab GeV Equipments (>2013)

18 Set 2008 JLab12.0 JLab/Finanziamenti e organizzazione Finanziamenti: DOE (+ NewPort News + Virginia)  JSA

18 Set 2008 JLab12.0 JLab/Info Pratiche Web Page: Registration and Training –Richiede un paio di giorni, gran parte può essere svolto da web –I diversi training hanno scadenza annuale o biennale –il badge permette di accedere agli uffici, laboratori, acceleratori, secondo il tipo di training acquisito Business Visa richiesta per lavorare al JLab Foresteria (ResFac) ….

18 Set 2008 JLab12.0 Hall A JLab12 Prima Riunione Plenaria 18 Settembre 2008

18 Set 2008 JLab12.0 Hall A Alta luminosità Ottima risoluzione momento/angolo Sofisticato PID Flessibilità della configurazione sperimentale La sala sperimentale più grande di JLab

18 Set 2008 JLab12.0 Hall A: Apparati 1 2 High Resolution Spectrometers BigBite: Large Angular Acceptance

18 Set 2008 JLab12.0 Hall A: Apparati 2

18 Set 2008 JLab12.0 Hall A: Apparati 3 DVCS Calorimeter Polarimetri Moller e Compton Bersagli di H, D, 3He, Be, C, Li, 16O, Pb, … Bersaglio polarizzato 3He (n)

18 Set 2008 JLab12.0 Hall A : Esperimenti Average time completion-submission of experiment: 20 months, 75% within 3 years Hall A running for 10+ years, with an average publication output of 4+ Top cited Hall A publications: ,

18 Set 2008 JLab12.0 Hall A: Tentative Plan 6 GeV

18 Set 2008 JLab12.0 Hall A: Upgrade per 11 GeV Existing Equipment Baseline ($2 M): DAQ per alta luminosità Beam line per migliore qualità del fascio e misura (Moller and Compton Polarimeter) Nuovo apparato ($2 M): Super BigBite Spectrometer: large acceptance, forward angle moderate momentum and angle resolutions versatile detectors Hadron PID

18 Set 2008 JLab12.0 Hall A: Approved Exp. 12 GeV DVCS: Measurements of Electron-Helicity Dependent Cross Sections of Deeply Virtual Compton Scattering with CEBAF at 12 GeV A1N: Measurement of neutron asymmetry A1n in the valence quark region using 8.8 GeV and 6.6 GeV beam energies and Bigbite spectrometer in Hall A GMP: Precision Measurement of the Proton Elastic Cross Section at High Q 2 GEP/GMP V: Large Acceptance Proton Form Factor Ratio Measurements at 13 and 15 (GeV/c) 2 Using Recoil Polarization Method Hall A sarà la prima sala ad essere servita dal nuovo fascio (dopo il 2013 ?)

18 Set 2008 JLab12.0 Hall A Management and Structure (da franco)