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HALL-A Long-Term Schedule

HALL-A Long-Term Schedule. DVCS Collaboration Meeting Sousse, Tunisia December 15-16 , 2008 K EES DE J AGER J EFFERSON L ABORATORY. Scheduled Experiments in Hall A. Exp Title Contact persons Oct-Mar/May run BigBite plus polarized 3 He experiments

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HALL-A Long-Term Schedule

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  1. HALL-A Long-Term Schedule DVCS Collaboration Meeting Sousse, Tunisia December 15-16, 2008 KEESDE JAGER JEFFERSON LABORATORY

  2. Scheduled Experiments in Hall A ExpTitleContact persons Oct-Mar/May run BigBite plus polarized 3He experiments E06-010 transversityXiaodongJiang E07-013 normal SSA Tim Holmstrom E06-014 d2n Brad Sawatsky E05-015 3He SSA Todd Averett E08-005 Target SSA Vince Sulkosky E05-102 Quasi-elastic 3He Doug Higinbotham August E05-109 HAPPEx-III Kent Paschke November E08-011 DIS-Parity XiaochaoZheng 2010 March E06-002 Lead Parity Bob Michaels • Under the resent budget scenario, JLab management has decided to terminate running after Mar 6 (the completion of d2n) until mid August, the start of HAPPEx-III. This has the consequence that the three last polarized 3He 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!

  3. 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, 2010. Qweak will run at a fixed energy/pass of 1.165 (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 g2p experiment requires a very large installation effort, optimally in parallel with the 6 month accelerator down in 2012. • 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.

  4. Hall A Schedule (Tentative!)‏

  5. Draft Schedule – Hall A 1 of 2 Enhanced Parity Quality 3 Experiments Dropped if FY09@26 weeks Requires equipment $$ early in FY09 to meet schedule

  6. Draft Schedule – Hall A 2 of 2 Year Experiment Major Installation Tasks Special Accel. Requirements Scientific Rating PAC Days FY10 E07-007 DVCS on the proton PbF2 calorimeter A 23 E08-025 DVCS on the neutron PbF2 calorimeter B+ 17 FY11 E07-007 E08-025 DVCS on the proton and neutron Completion A, B+ complete E08-008 Deuteron electrodisintegration near threshold BigBite B+ (C3)‏ 18 (10 scheduled) E07-006 Short Range Correlations via (e,e’pN) Move BigBite to back of HRS-R A- 23 E08-010 N-ΔCoulomb quadrupole amplitude at low Q2 B+ 3 E08-014 Three-nucleon correlations A- 12 FY12 E08-027 g2p and the LT Spin polarizability Septa + beamline chicane DNP Polarized target A- 24 E08-007 GEp/GMp at very low Q2 DNP Polarized Target B+ (C3)‏ 11 E07-012 Hypernuclear 16O and production Septa B+ (C3)‏ 12

  7. 6 GeV Experimental Equipment: Hall A HALL A FY08 FY08 FY09 FY10 FY11 FY12 FY13 FY14 PLAN actual PLAN request request request request request ITEM Polarized 3He Target $135 $185 $$100$1 Parity Instrumentation $117 $48 $240 BigBite $100 $149 High-Speed Data Acq. System (On-going)‏ $100 $100 $100 Compton Polarimeter $155 $111 $60 Transversity Coulomb Sum Rule $18 $28 DVCS $30 $0 $80 $300 Moller Polarimeter $30 $5 $190 DIS Parity $39 $80 deltaLT $50 $630 $300 General Capital (Long-Term Maintenance)‏ -$31 -$31 $200 $200 $200 $200 SuperBigBite $100 $400 $500 $300 Totals - Hall A $554 $540 $700 $930 $600 $700 $800 $700 Total without manpower $225 $380 $600 $500 $500 $600 $500

  8. Topics for Discussion • Under present FY09 budget no Hall A funds for testing of PbF2 crystals, but sufficient funds in FY10. Can testing be held off until October 1, 2009? • The summer down starts on July 23, 2010 and lasts until September 3. Is this sufficient for DVCS installation? If not, for Hall A the down has to start earlier. • We need sufficient user support at JLab, both for testing and assembly of crystals and for installation. Commitments! • Hall A is scheduled to start taking 11 GeV beam on October 1, 2013. • Can DVCS be ready to be the first experiment to run?

  9. 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.

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