1. 18 Set 2008 JLab12.0 JLab12 / Gruppo Roma1-ISS JLab12 Prima Riunione Plenaria 18 Settembre 2008

2. 18 Set 2008 JLab12.0 Chi Siamo Evaristo Cisbani(ISS)70 Francesco Cusanno(ISS)100 Salvatore Frullani(ISS)40 Francesco Ghio(ISS)20 Franco Garibaldi(ISS)70 Franco Meddi(UniRoma1)30 Giudo Maria Urciuoli(INFN-RM1)30 Totale3.6 FTE Tecnici (da ISS) Stefano Colilli40 Rolando Fratoni70 Fausto Giuliani80 Massimo Gricia70 Maurizio Lucentini40 Fabio Santavenere80 Totale3.8 FTE

3. 18 Set 2008 JLab12.0 Apparati Realizzati hadron arm electron arm septum magnets RICH Detector

4. 18 Set 2008 JLab12.0 E – 91-111 S. Frullani, J. Kelly, A. Sarty “Investigation of N-  transition via polarization observables in Hall A” E – 94-107 F. Garibaldi S. Frullani, J. LeRose, P. Markowitz “High Resolution Hypernuclear 1p shel Spectroscopy” E – 98-108 O.Baker,S. Frullani, M. Iodice “Electroproduction of Kaons up to Q2 = 3 GeV/c) 2 ” E – 97-110, JP Chen, A Deur, F. Garibaldi “*GDH Rum Rule of 3He and Neutron using nearly real photons” E 06-007, K. Aniol, A. Saha, G.M. Urciuoli, G. Udias, “Impulse Approssimation Limitations to the (e,e’p) on 208Pb(e,e’p)” Esperimenti in Hall A con leadership italiana 6 GeV ran

5. 18 Set 2008 JLab12.0 E – 06-011, E. Cisbani, H. Gao, X, Jiang “Target Single Spin Asymmetry in Seminclusive Deep Inelastic (e’e’ pai+) Reaction on a Transversity Polarized 3He Target” E – 06-002, R. Michaels, P. Souder, G.M.Urciuoli “A Clean Measurement of Neutron Skin of 208Pb trough Parity Violatung Electron Scattering” E – 07-012, F. Garibaldi, M. Iodice, J. LeRose, P. Markowitz “The Angular Dependence of 16O(e,e’K)16N_Lambda, and H(e,e’K)Lambda” 12 GeV PR-12-07-109, C.Perdrisat, L.Pentchev, E.Cisbani, V.Punjabi, B.Wojtsekhowski “Large Acceptance Proton Form Factor Ratio Measurement at 13 and 15 GeV 2 Using Recoil Polarization Method” 6 GeV to run - working groups ---> white papers - hypernuclear physics - spin structure of neutron - form factors - Gep --> super bigbit spectrometer for Hall A

6. 18 Set 2008 JLab12.0 Proton E/M Form Factors (by polarization transfer in elastic ep scattering) Longitudinal P l and transverse P t polarizations of the scattered proton Rosenbluth, one photon exchange approximation Dramatic evidence of inadequate interpretation of lepton scattering experiments Definitive test for many phenomenological models aiming to explain the GEp/GMp slope Investigate non-perturbative to perturbative QCD region Set limit or observe pQCD asymptotic Most likely will investigate negative region JLab12: measurements up to Q 2 = 15 GeV 2

7. 18 Set 2008 JLab12.0

8. 18 Set 2008 JLab12.0

9. 18 Set 2008 JLab12.0

10. 18 Set 2008 JLab12.0

11. 18 Set 2008 JLab12.0

12. 18 Set 2008 JLab12.0 Chamber Layout 2D xy strip Readout (COMPASS design) 2 foils: 50x40 cm2 each 400  m pitch 4500 channels Total Thickness: X0 < 0.7 % 3 GEM foils 100x40 cm2 -Single large foil not strictly required -Last foil segmented (to reduce hits ambiguity) ?

13. 18 Set 2008 JLab12.0 GEM Principle

14. 18 Set 2008 JLab12.0 SBS Primary Tracker