Hall A collaboration meeting, December 3-5, 2008, 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 3-5, 2008 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. If you attend (most of you, I hope) please pay Stephanie the standard 9 $ contribution

Hall A collaboration meeting, December 3-5, 2008, 2 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Hall A Approved Proposals PAC (+2) Experiments completed 207/159(!) calendar days scheduled for the next 12 months Backlog ~5.1 years (annual average for Hall A is ~60 days at 80% funding) ‏

Hall A collaboration meeting, December 3-5, 2008, 3 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Publications (incl. submissions) in 2008-I K. Slifer et al., He-3 Spin-Dependent Cross Sections and Sum Rules, PRL 101, (2008), [nucl-ex] P. Solvignon et al., Quark-Hadron Duality in Neutron (3He) Spin Structure, PRL 101, (2008), [nucl- ex] R. Subedi et al., Probing Cold Dense Nuclear Matter, Science 320, 1476(2008) Geraud Laveissiere et al., Virtual Compton Scattering and Neutral Pion Electroproduction in the Resonance Region up to the Deep Inelastic Scattering Region at Backward Angles, accepted by PRC F. Cusanno et al., High Resolution Spectroscopy 12 N L by Electroproduction, submitted to PRL A. Shahinyan et al., The Electromagnetic calorimeter in JLab Real Compton Scattering Experiment, submitted to NIMA, arXiv: S. Marrone et al., Performance of the Two Aerogel Cherenkov Detectors of the JLab Hall A Hadron Spectrometer, submitted to NIMA, [physics.ins-det] Total number of Hall A publications: Science 1, PRL+PLB 40(+1), PRC 18, NIM 15(+2). 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 11 years, with an average publication output of 5+. 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, December 3-5, 2008, 4 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  Achievements to date: E O(e,e’p) published E91-010HAPPEx-I published E N-> Δ published E93-027G E p -I published E94-012H(  p) π o published E  n -> π - ppublished E95-001G M n published E99-117A 1 n published E93-050VCSaccepted  Standard publications in draft form for too long: -Kaon electroproduction -Transverse SSA

Hall A collaboration meeting, December 3-5, 2008, 5 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Scheduled Experiments in Hall A ExpTitle Contact persons Oct-Mar/Mayrun BigBite plus polarized 3 He experiments E06-010transversityXiaodong Jiang E07-013normal SSATim Holmstrom E06-014d 2 n Brad Sawatsky E He SSATodd Averett E08-005Target SSAVince Sulkosky E05-102Quasi-elastic 3 He Doug Higinbotham AugustE05-109HAPPEx-III Kent Paschke NovemberE08-011DIS-ParityXiaochao Zheng 2010 MarchE06-002Lead ParityBob Michaels  Under the resent budget scenario, JLab management has decided to terminate running after Mar 6 (the completion of d 2 n ) until mid August, the start of HAPPEx-III. This has the consequence that the three last polarized 3 He experiments will not run in the foreseeable future. However, it is rumoured that an omnibus bill will be approved “shortly after the Presidential inauguration”, that includes the full Presidential budget for DOE!

Hall A collaboration meeting, December 3-5, 2008, 6 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 FY10 and following FYs as long as the budget continues as expected. This corresponds to a total of 4 months accelerator down per year, with as much as possible during the summer. Accelerator needs 6 month down prior to the 12 GeV installation  The long-term schedule is locked by the start of Qweak, scheduled for May 21, Qweak will run at a fixed energy/pass of (possibly 1.185) GeV and maximum polarization, severely restricting the available energy selection, current and polarization.  Also, resources, both capital and designers, will become scarcer as the 12 GeV activities increase.  The three Hall A parity experiments can not run in parallel with Qweak, thus have to be scheduled starting mid August 2009, in the order HAPPEx-III, PVDIS and PREx.  The g 2 p experiment requires a very large installation effort, optimally in parallel with the 6 month accelerator down in  Only one experiment (4He(e,e’p)) not scheduled, two (PV-DIS and D(e,e’p)) allocated less than PAC approved, but three C3 experiments scheduled.

Hall A collaboration meeting, December 3-5, 2008, 7 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Hall A Schedule (Tentative!) ‏

Hall A collaboration meeting, December 3-5, 2008, 8 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility YearExperimentMajor Installation TasksSpecial Accel. Requirements Scientific Rating PAC Days FY09 E06-010TransversityPolarized 3He, BigBiteStandardA29 E07-013Normal SSA in DIS on polarized 3He Polarized 3He, BigBiteStandardB0 (parasitic) E06-014d2nPolarized 3He, BigBiteStandardA13 E E Polarized 3He, BigBiteStandardB+8 E05-102QE 3HePolarized 3He, BigBiteStandardA-15 E05-109HAPPEx-IIIMøller and Compton Upgrade Small helicity correlations (~1/20*HAPPEx-I) A-30 (start) FY10 E05-109HAPPEx-IIICompletionSmall helicity correlations (~1/20*HAPPEx-I) A-Complete E08-011DIS-parityHigh-speed DAQA-32 (23 scheduled) E06-002PREX: Lead ParityRoom-temperature septa Møller and Compton Upgrade Small helicity correlations (~1/20*HAPPEx-I) A30 Draft Schedule – Hall A 1 of 2 3 Experiments Dropped if weeks Enhanced Parity Quality Requires equipment $$ early in FY09 to meet schedule

Hall A collaboration meeting, December 3-5, 2008, 9 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility Draft Schedule – Hall A 2 of 2

Hall A collaboration meeting, December 3-5, 2008, 10 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility 6 GeV Experimental Equipment: Hall A

Hall A collaboration meeting, December 3-5, 2008, 11 Operated by the Jefferson Science Associates for the U.S. Department Of Energy Thomas Jefferson National Accelerator Facility 12 GeV Schedule CD-3 formally approved Hall A scheduled to start commissioning in Fall 2013 Plans for large instrumentation developments starting: PV-DIS at 12 GeV Møller at 12 GeV Super BigBite HES/HKS in Hall A

Hall A collaboration meeting, December 3-5, 2008, 12 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. A draft of a long-term schedule for the 6 GeV program will be discussed at PAC34 in January. Vocalize your concerns when you feel the need. Mont, the new JLab director, is actively getting involved in the JLab research program. He is being educated on the 6 GeV experiments through a series of lectures to which some of you (as spokespersons) have been invited. Finally, continue to make our achievements known to the scientific community through timely publications.