Hall A collaboration meeting, Junr 21-22, 2007, 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 December 12-14, 2007 K EES DE J AGER J EFFERSON L ABORATORY Our wine-and cheese gathering is in A110 on Thursday evening, starting at 6:00 pm. Dennis has graciously agreed to chaperone us. If you attend (most of you, I hope) please pay Stephanie the standard 9 $ contribution

Hall A collaboration meeting, Junr 21-22, 2007, 2 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Achievements 2007-I Successfully ran JulyE04-018Elastic scattering off 3,4 HeMakis Petratos Aug-OctAssembly of NaI calorimeterAlexandre Camsonne Installation for Coulomb SumEd Folts Oct-DecE05-110Coulomb SumZein-Eddine Meziani 13(!) proposals submitted to PAC-33 for a total of 281 days with an allocation of 101 days 7 completely new proposals 2 resubmissions to remove conditional approval 1 jeopardy 2 resubmissions to remove deferral 1 resubmission for additional beam time Essential whether new proposals can run in parallel with Qweak GEp and N-> Δ definitely can PV-DIS and n-DVCS can if they take a hit in beam energy (polarization?) G M n, x>2 and WACs probably can B(Q 2 ), 4 He(e,ep), deuteron threshold definitely can not

Hall A collaboration meeting, Junr 21-22, 2007, 3 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Hall A Approved Proposals PAC Experiments completed 42(!) days scheduled for the next 12 months Backlog ~4.7 years (annual average for Hall A is ~60 days at 80% funding)

Hall A collaboration meeting, Junr 21-22, 2007, 4 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Publications (incl. submissions) in 2007-I M. Iodice et al., High Resolution Spectroscopy 12 B λ by Electroproduction, PRL 99, (2007), nucl-ex/ R. Shneor et al., Investigation of proton-proton short-range correlations via the 12 C(e,epp) reaction, PRL 99, (2007), nucl-ex/ G. Ron et al., The Proton Elastic Form Factor Ratio µ p G E p /G M p at Low Momentum Transfer, PRL 99, (2007), nucl-ex/ M. Mazouz et al., Deeply Virtual Compton Scattering off the Neutron, PRL (2007), nucl-ex/ A. Shahinyan et al., The Electromagnetic calorimeter in JLab Real Compton Scattering Experiment, arXiv: Total number of Hall A publications: PRL+PLB 30, PRC 14, NIM 14(+1). Average time from completion of experiment to submission 20 months with 75% within 3 years. At present 5 experiments that have not submitted a manuscript more than 3 years after completion Hall A has been running now for 10+ years, with an average publication output of 4+. Essential that more effort goes into publications, especially archival pubs Top cited Hall A publications: , Please enter all publications into the JLab publication data base on submission

Hall A collaboration meeting, Junr 21-22, 2007, 5 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,ep)complete L/T separation -E91-026deuteron A and B next spring -E93-050VCS -E94-010GDHonly introduction needed -E99-007G E p -II -E99-114WACS Achievements to date: E O(e,ep) published E91-010HAPPEx-I published E N-> published E93-027G E p -I published E94-012H( ) π o published E n -> π - ppublished E95-001G M n published E99-117A 1 n published

Hall A collaboration meeting, Junr 21-22, 2007, 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 Feb-MarInstallation of BigBite Apr-MayE π 0 electroproductionR. Lindgren May-JulInstallation of Polarized 3 He target Jul-Decrun BigBite plus polarized 3 He experiments E06-010transversityXiaodong Jiang E06-014d 2 n Brad Sawatsky FY09E He SSATodd Averett E05-102Quasi-elastic 3 He Doug Higinbotham 2009HAPPEx-III, Lead Parity, DIS-Parity Schedule on the web through calendar However, there are significant uncertainties about the budget (continuing resolution possibly for full FY08, we might not get the Presidents budget,…). Even if we do get PB08, the present budget allocation to Physics implies a ~200 k$ cut for Hall A. If that sticks, lab management has been informed that we will have to delay the start-up of transversity by 5 weeks. All of this means that the beam schedule can only be trusted through May 2008.

Hall A collaboration meeting, Junr 21-22, 2007, 7 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Hall A Schedule (Very Tentative!) Max energy Qweak will run at is GeV (maybe GeV, then 5 pass ~ 5.7 GeV) Accelerator needs 6 month down prior to the 12 GeV installation

Hall A collaboration meeting, Junr 21-22, 2007, 8 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility 6 GeV Energy Recovery Plan Today

Hall A collaboration meeting, Junr 21-22, 2007, 9 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Long-Term Schedule CEBAF will be limited to ~33 weeks of beam on target in FY08 and following FYs as long as the budget continues as expected. This corresponds to a total of 4 months accelerator down per year. Based on these assumptions Hall A still has a full year of running available for new proposals. However, for the last 18+ months before the accelerator down we would have to run in parallel with Qweak at a fixed energy/pass of 1.1 GeV and possibly severe restrictions in the available current and polarization. Also, resources, both capital and designers, will become scarcer as the 12 GeV activities increase. PAC-33 is last 6 GeV PAC. Summer 2008 PAC will be charged to evaluate long- term schedule (that means that we need to have one by then!)

Hall A collaboration meeting, Junr 21-22, 2007, 10 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility 12 GeV Schedule

Hall A collaboration meeting, Junr 21-22, 2007, 11 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Summary Hall A continues to have a very active and successful research program, but running the 6 GeV program will continue under serious pressure. Vocalize your concerns when you feel the need. Also, make our achievements known to the scientific community through timely publications. Have to start discussions about the form of the Hall A collaboration in the 12 GeV era. LRP report writing process practically completed, expect final report shortly. Please use your vote in the ongoing DNP election process