Hall A Collaboration, June 10, 2010, 1 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility HALL-A STATUS REPORT Hall A Collaboration Meeting June 10-11, 2010 K EES DE J AGER J EFFERSON L ABORATORY

Hall A Collaboration, June 10, 2010, 2 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Publications (incl. submissions) in 2010 A. Shahinyan et al., The Electromagnetic calorimeter in JLab Real Compton Scattering Experiment, resubmitted to NIMA, arXiv: J. Glister et al., Proton Polarimeter Calibration between 82 MeV and 217 MeV, NIMA A606, 578 (2009) I. Pomerantz et al., Hard Photodisintegration of a Proton Pair, PLB 684, 106 (2010), [nucl-ex] M. Coman et al., Cross Sections and Rosenbluth Separations in 1 H(e,e’K + ) Λ up to 2.35 GeV 2, PRC 81, (2010), [nucl-ex] M. Paolone et al., Polarization Transfer in the 4 He(e,e'p) 3 H Reaction at Q 2 = 0.8 and 1.3 GeV 2, submitted to PRL, [nucl-ex] J. Glister et al., Polarization Observables in Deuteron Photodisintegration below 360 MeV, submitted to PRL, [nucl-ex] Two papers in collaboration review Total number of Hall A publications: Science 1, PRL+PLB 42(+2), PRC 19, NIM 18(+1) Hall A has been running now for 11 years, with an average publication output of 5+ However, CLAS publishes papers annually!!!! Top cited Hall A publications: , , ,

Hall A Collaboration, June 10, 2010, 3 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility PUBLICATIONS-II  Archival papers promised to be completed LAST year: -E He(e,e’p)complete L/T separation -E91-026deuteron A and B next spring -E94-010GDHonly introduction needed -E99-007G E p -II -E99-114WACS -E01-001Super-Rosenbluth -E94-107Hypernuclear -E99-115HAPPEX-II PLEASE COMPLETE THESE PUBLICATIONS ASAP!!

Hall A Collaboration, June 10, 2010, 4 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility PUBLICATIONS-III  Standard publications in draft form for too long: E He(e,e’p) E99-115Transverse SSA E97-110SAGDH (coming out soon, I have been promised!) E01-020Deuteron Electrodisintegration (this summer?) Circulating, soon to be submitted (!?) E02-013G E n E08-007G E p at low Q 2 E05-004A(Q) at low Q 2 E04-018Elastic Scattering off 3,4 He E O(e,e’p) E Pb(e,e’p) PLEASE COMPLETE THESE PUBLICATIONS ASAP!! THE CC IS SENDING OUT MONTHLY REMINDERS

Hall A Collaboration, June 10, 2010, 5 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Lead Parity Experiment PREX Installation completed two weeks late Problems with Helicity-flip gating (resolved) Setting raster too large for optics target (resolved) Raster synching to compensate for target inhomogeneities (resolved) Radiation damage to electronics (ongoing) Radiation and heat damage to O-rings (ongoing) Heroic effort from Hall A technical staff and from PREX collaboration, but outcome still uncertain Run extended to June 21, followed by a brief run for APEX tests WARNING: Summer down shifted by three weeks

Hall A Collaboration, June 10, 2010, 6 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Scheduled Experiments in Hall A ExpTitleContact persons June/SepDVCS Installation (enlarged PbF 2 calorimeter) Sep/DecE07-007p-DVCSCarlos Munoz Camacho E08-025n-DVCSMalek Mazouz ➙ Preparations for DVCS installation well underway ➙ During the six-month accelerator down in 2011 Hall A is scheduled for a major installation in preparation for two A-rated experiments E (g 2 p ) and E (G E p /G M p at very low Q 2 ). The Hall C SC magnet for the polarized target has been repaired at Oxford, but full funding for those two experiments is still in jeopardy.

Hall A Collaboration, June 10, 2010, 7 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Hall A Schedule (Tentative!) ‏ Open issue: Summer down has been shifted by three weeks, but FY11 six-month down will remain in place, effectively shortening the FY11 schedule by three weeks

Hall A Collaboration, June 10, 2010, 8 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility PAC36 PAC36 (August 23-25) will only provide a grade and beam time allocation for proposals in two science categories, approved in previous PACs: ➙ The Hadron spectra as probes of QCD (GluEx and heavy baryon and meson spectroscopy) ➙ The longitudinal structure of the hadrons (Unpolarized and polarized parton distribution functions) Conditionally approved experiments in these categories need to be resubmitted (and presented) and approved before being considered On June 3 a Safety Review chaired by Rolf Ent judged the Conceptual Design of a tritium target to be valid enough for the F 2 (d/u) proposal to be submitted to PAC36.

Hall A Collaboration, June 10, 2010, 9 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Hall A Approved Experiments at 12 GeV ProposalPhysicsEnergy (GeV)Proposal days Beam Time Allocation Rating Target Material E DVCS6.6, 8.8, 11100LH2 E A1n in valence region2.2, 6.6, 8.823Polarized 3 He E GEp, GMp 6.6, 8.8, A- LH2 E GEp/GMp4.4, A- LH2 E Møller 10.9, 11210LH2 E GEn 4.4, 6.6, A- Polarized 3 He E GMn 4.4, 6.6, 8.8, B+ LH2, LD2 E SIDIS with SOLID 8.8, 1190Polarized 3 He E PVDIS with SOLID8.8, 11339LH2, LD2 TOTAL960

Hall A Collaboration, June 10, 2010, 10 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Hall A Conditionally Approved 12 GeV Experiments ProposalPhysicsEnergy (GeV)Proposal daysTarget Material Conditional E F2n/F2p, d/u, EMC2.2, 4.4, 6.6, 8.8, H, 3 He E SIDIS with SBS8.8, 1164 Polarized 3 He E hypernuclei Li E A’ search 1.1, 2.3, 3.3, 4.533W

Hall A Collaboration, June 10, 2010, 11 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility 12 GeV ➙ Three large experimental projects in preparation for Hall A ➙ SuperBigbite: ➙ Funding has now been included in the JLab out-year budget request ➙ Second technical review at JLab very supportive, to be followed by mail review this summer ➙ MOLLER: ➙ Fully approved by PAC34 ➙ Director’s review on January 14/15 at JLab highly successful ➙ Waiting for CD-0 ➙ SoLID: ➙ Technical conceptual design completed by ANL ➙ Fully approved at PAC35 (as well as SIDIS with SoLID) ➙ Waiting for Mont to organize Director’s Review

Hall A Collaboration, June 10, 2010, 12 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Summary The research program in Hall A is highly successful, and has a bright future, both for the remainder of the 6 GeV program and for that with the upgrade There are approved proposals that will take close to 10 years to complete (if one includes installation time): ~1 year with the HRS pair ~1.5 years with SuperBigbite ~2.5 years with MOLLER ~3.5 years with SoLID, including SIDIS Clearly, it will take a very strong collaboration effort to accomplish this However, always keep in mind that the publication of our results is a necessary requirement for crowning our cap.