JLab e CEBAF 100m 5 Recirculation Arcs Central Helium Liquefier JLab12 Prima Riunione Plenaria 0.6 GeV Linac 18 Settembre 2008 0.6 GeV Linac 45 MeV Injector Extraction element End Stations Energy : 1.2 - 5.7 GeV Max current : 200mA Polarization : ~80% Simultaneous delivery to 3 Halls 18 Set 2008 JLab12.0 Jefferson Lab 18 Set 2008 JLab12.0 3 End Stations 18 Set 2008 JLab12.0 Hall A: Two High Resolution (10-4) Spectrometers L[cm-2s-1] = 1039 18 Set 2008 JLab12.0 Hall B: The CEBAF Large Acceptance Spectrometer (CLAS) L[cm-2s-1] = 1034 18 Set 2008 JLab12.0 Hall C: A High Momentum and a Broad Range Spectrometer L[cm-2s-1] = 1039 18 Set 2008 JLab12.0 12 116 GeV CEBAF Upgrade magnets and power supplies CHL-2 ~ $310 M Two 1.1 0.6 GV linacs Enhanced capabilities in existing Halls 18 Set 2008 Lower pass beam energies still available JLab12.0 12 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: www.jlab.org • 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 Number Approved Days Polarized A Number Approved beam status Completed Days run Number Jeopardized Days to be run Nucleon and Meson Form Factors/Sum Rules Few Body Nuclear Properties Properties of Nuclei 12 235 10 9 11 212 2 23 18 281 8 4 16 246 6 35 11 200 2 5 7 135 7 91 N* and Meson Properties 10 170 9 4 4 91 2 79 Strange Quarks and Parity Violation Total 7 183 5 6 5 130 1 53 58 1069 34 28 43 814 18 281 Conditionally Approved 2 0 0 0 0 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: 2 250+, 13 50+ 18 Set 2008 JLab12.0 Hall A: Tentative Plan 6 GeV 2008 2009 2010 2011 2012 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 Transversity (TMD)E06-010 d2 (DF) E06-014 3He SSA (GPD) E05-015 3He AxAy E05-102 HAPPEX III E05-109 PV-DIS E08-011 PREX E06-002 DVCS (GPD) E08-027 Deuteron Near ThrE08-008 SRC E0'7-006 N-Delta (SRC) E08-010 g2p (res) E08-027 GEP Low Q2 E08-007 Hypernuclear 16OE07-012 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 Q2 • 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) 18 Set 2008 JLab12.0