HALL-A STATUS REPORT

Hall A collaboration meeting, December 3-5, 2008, 1Operated by the Jefferson Science Associates for the U.S. Department Of Energy

Thomas Jefferson National Accelerator Facility

HALL-A STATUS REPORT

Hall A Collaboration MeetingDecember 3-5, 2008

KEES DE JAGER

JEFFERSON LABORATORY

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 Approved Proposals PAC 4-33

•46(+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)



Publications (incl. submissions) in 2008-I

• K. Slifer et al., He-3 Spin-Dependent Cross Sections and Sum Rules, PRL 101, 022303 (2008), 0803.2267 [nucl-ex]

• P. Solvignon et al., Quark-Hadron Duality in Neutron (3He) Spin Structure, PRL 101, 182502 (2008), 0803.3845 [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 12NL by Electroproduction, submitted to PRL• A. Shahinyan et al., The Electromagnetic calorimeter in JLab Real Compton Scattering Experiment, submitted

to NIMA, arXiv:0704.1830• S. Marrone et al., Performance of the Two Aerogel Cherenkov Detectors of the JLab Hall A Hadron

Spectrometer, submitted to NIMA, 0810.4639 [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: 2 250+, 2 100+, 15 50+• Please enter all publications into the JLab publication data base on submission



PUBLICATIONS-II Archival papers promised to be completed LAST year:

- E89-044 3He(e,e’p) complete L/T separation- E91-026 deuteron A and B next spring- E94-010 GDH only introduction needed- E99-007 GE

p-II- E99-114 WACS

Achievements to date:• E89-003 16O(e,e’p) published• E91-010 HAPPEx-I published• E91-011 N->Δ published• E93-027 GE

p-I published• E94-012 H(γp)πo published• E94-104 γn -> π-ppublished• E95-001 GM

n published• E99-117 A1

n published• E93-050 VCS accepted

Standard publications in draft form for too long:- Kaon electroproduction- Transverse SSA



Scheduled Experiments in Hall AExp TitleContact persons

Oct-Mar/May run BigBite plus polarized 3He experimentsE06-010 transversity Xiaodong JiangE07-013 normal SSA Tim

HolmstromE06-014 d2

n Brad SawatskyE05-015 3He SSA Todd AverettE08-005 Target SSA Vince SulkoskyE05-102 Quasi-elastic 3He Doug Higinbotham

August E05-109 HAPPEx-III Kent PaschkeNovember E08-011 DIS-Parity Xiaochao Zheng

2010March 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!



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.



Hall A Schedule (Tentative!)



Year Experiment Major Installation Tasks Special Accel. Requirements

Scientific Rating

PAC Days

FY09

E06-010 Transversity Polarized 3He, BigBite Standard A 29

E07-013 Normal SSA in DIS on polarized 3He

Polarized 3He, BigBite Standard B 0 (parasitic)

E06-014 d2n Polarized 3He, BigBite Standard A 13

E05-015E08-005

Polarized 3He, BigBite Standard B+ 8

E05-102 QE 3He Polarized 3He, BigBite Standard A- 15

E05-109 HAPPEx-III Møller and Compton Upgrade

Small helicity correlations (~1/20*HAPPEx-I)

A- 30 (start)

FY10

E05-109 HAPPEx-III Completion Small helicity correlations (~1/20*HAPPEx-I)

A- Complete

E08-011 DIS-parity High-speed DAQ A- 32 (23 scheduled)

E06-002 PREX: Lead Parity Room-temperature septa Møller and Compton Upgrade

Small helicity correlations (~1/20*HAPPEx-I)

A 30

Draft Schedule – Hall A 1 of 2

3 Experiments Dropped if FY09@26 weeks

Enhanced Parity Quality

Requires equipment $$ early in FY09 to meet schedule



Draft Schedule – Hall A 2 of 2Year Experiment Major Installation Tasks Special Accel.

RequirementsScientific 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

E07-007E08-025

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-Δ Coulomb quadrupole amplitude at low Q2

B+ 3

E08-014 Three-nucleon correlations A- 12

FY12

E08-027 g2p and the LT Spin

polarizabilitySepta + beamline chicaneDNP Polarized target

A- 24

E08-007 GEp/GM

p at very low Q2 DNP Polarized Target B+ (C3) 11

E07-012 Hypernuclear 16O and production

Septa B+ (C3) 12



HALL A FY08 FY08 FY09 FY10 FY11 FY12 FY13 FY14PLAN actual PLAN request request request request request

ITEMPolarized 3He Target $135 $185 $$100$1Parity Instrumentation $117 $48 $240BigBite $100 $149High-Speed Data Acq. System (On-going) $100 $100 $100Compton Polarimeter $155 $111 $60TransversityCoulomb Sum Rule $18 $28DVCS $30 $0 $80 $300Moller Polarimeter $30 $5 $190DIS Parity $39 $80deltaLT $50 $630 $300General Capital (Long-Term Maintenance) -$31 -$31 $200 $200 $200 $200SuperBigBite $100 $400 $500 $300Totals - Hall A $554 $540 $700 $930 $600 $700 $800 $700Total without manpower $225 $380 $600 $500 $500 $600 $500

6 GeV Experimental Equipment: Hall A



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



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.

Documents

HALL-A STATUS REPORT