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HALL-A STATUS REPORT

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Title: HALL-A STATUS REPORT


1
HALL-A STATUS REPORT
  • Hall A Collaboration Meeting
  • June 21-22, 2007
  • KEES DE JAGER
  • JEFFERSON LABORATORY

Because of the User Group Meeting we could not
reserve the Great Room in the ResFac. Therefore,
our wine-and cheese gathering is in A110 on
Thursday evening, starting at 530 pm. Larry has
graciously agreed to chaperone us. If you attend
(most of you, I hope) please pay Shannon the
standard 9 contribution
2
Achievements 2007-I
  • Successfully ran
  • Feb Elastic scattering off 7Li, B R. Gilman, D.
    Higinbotham
  • Mar E06-007 208Pb(e,ep) K. Aniol
  • Oct-July E04-018 Elastic scattering off 3,4He M.
    Petratos
  • June E03-101 proton pair R. Gilman
  • 10 proposals submitted to PAC31 for a total of
    197 days with an allocation of 60 days
  • 3 proposals approved for a total beam time of 58
    days
  • 2 proposals conditionally approved, need to come
    back to PAC
  • Submitted two 12 GeV proposals to PAC-32

3
Hall A Approved Proposals PAC 4-31
  • 44 Experiments completed
  • 42(!) days scheduled for the next 12 months
  • Backlog 3.5 years (annual average for Hall A is
    75 days at full funding)

4
Publications (incl. submissions) in 2007-I
  • B. Anderson et al., Extraction of the Neutron
    Magnetic Form Factor from Quasi-elastic
    3He(pol)(e(pol),e') at Q2 0.1 - 0.6 (GeV/c)2,
    PRC 75, 034003 (2007)
  • Yi Qiang et al., A Search for Sigma05, N05 and
    Theta Pentaquark States, PRC 75, 055208 (2007)
  • J. Kelly et al., Recoil Polarization Measurement
    for Neutral Pion Electroproduction at Q2 1
    (GeV/c)2 near the Delta Resonance, PRC 75, 025201
    (2007)
  • A. Danagoulian et al., Compton-scattering cross
    section on the proton at high momentum transfer,
    PRL 98, 152001 (2007)
  • X. Jiang et al., Recoil Proton Polarization in
    High-Energy Deuteron Photodisintegration with
    circularly Polarized Photons, PRL 98, 182302
    (2007)
  • M. Iodice et al., High Resolution Spectroscopy
    12B? by Electroproduction, PRL, nucl-ex/0705.3332
  • R. Shneor et al., Investigation of proton-proton
    short-range correlations via the 12C(e,epp)
    reaction, PRL, nucl-ex/0703023
  • G. Ron et al., The Proton Elastic Form Factor
    Ratio µpGEp/GMp at Low Momentum Transfer, PRL,
    nucl-ex/0706.0128
  • A. Shahinyan et al., The Electromagnetic
    calorimeter in JLab Real Compton Scattering
    Experiment,?arXiv0704.1830
  • Total number of Hall A publications PRLPLB
    30(3), PRC 16, 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
  • Essential that more effort goes into
    publications, especially archival pubs
  • Hall A has been running now for 10 years!
  • Please enter all publications into the JLab
    publication data base on submission

5
PUBLICATIONS-II
  • Archival papers promised to be completed LAST
    year
  • E89-044 3He(e,ep)
  • E91-026 deuteron A and B
  • E93-050 VCS
  • E94-010 GDH
  • E99-007 GEp-II
  • E99-114 WACS
  • Achievements to date
  • E89-003 16O(e,ep) published
  • E91-010 HAPPEx-I published
  • E91-011 N-gt? submitted
  • E93-027 GEp-I published
  • E94-012 H(???)po published
  • E94-104 ?n -gt p-p published
  • E95-001 GMn accepted
  • E99-117 A1n published

6
Scheduled Experiments in Hall A
  • Exp Title Contact persons
  • Jul-Sep down forced by FY07 budget restrictions
  • Oct-Dec E05-110 Coulomb Sum Rule B. Sawatzky
  • Jan-Mar Installation of BigBite
  • Mar-Apr E04-007 p0 electroproduction R. Lindgren
  • Apr-Jun Installation of Polarized 3He target
  • Jul-Dec run BigBite plus polarized 3He
    experiments
  • FY09 HAPPEx-III, Lead Parity, DIS-Parity,
    4He(e,ep)
  • Schedule in FY08 delayed by another month, driven
    by need to install and commission(!) new
    cryo-moduyles, but otherwise it would have been
    limited by the budget available for 6 GeV
    operations.
  • This will remain for the outyears with possible
    additional constraints driven by the need for
    engineering and design manpower for 12 GeV and
    limitations in capital funds.

7
Hall A Schedule (Very Tentative!)
8
6 GeV Energy Recovery Plan
Today
9
Long-Term Schedule
  • Highly likely that CEBAF will be limited to 30
    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 would still
    have 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 (I have suggested to Larry to run Qweak
    at 150 µA in stead of the requested 180 µA).
  • Also, resources, both capital and designers, will
    become scarcer as the 12 GeV activities increase.
  • Larry has predicted that there will continue to
    be 6 GeV PACs until 3 years prior to the 12 GeV
    shutdown. This would mean that there will be (at
    least) two more 6 GeV PACs (2008 and 2009).

10
12 GeV Upgrade Phases and Schedule
  • (based on funding guidance provided by DOE-NP in
    April 2007)
  • 2004-2005 Conceptual Design (CDR) - finished
  • 2004-2008 Research and Development (RD) -
    ongoing
  • 2006 Advanced Conceptual Design (ACD) - finished
  • 2006-2008 Project Engineering Design (PED) -
    ongoing
  • 2009-2013 Construction starts in 18 months!
  • Accelerator shutdown start mid 2012
  • Accelerator commissioning mid 2013
  • 2013-2015 Pre-Ops (beam commissioning)
  • Hall commissioning start late 2013

11
12 GeV Schedule
12
LRP Recommendations
  1. We recommend the completion of the 12 GeV Upgrade
    at Jefferson Lab. The Upgrade will enable new
    insights into the structure of the nucleon, the
    transition between the hadronic and quark/gluon
    descriptions of nuclei, and the nature of
    confinement.
  2. We recommend the construction of the Facility for
    Rare Isotope Beams, FRIB, a world-leading
    facility for the study of nuclear structure,
    reactions and astrophysics. Experiments with the
    new isotopes produced at FRIB will lead to a
    comprehensive description of nuclei, elucidate
    the origin of the elements in the cosmos, provide
    an understanding of matter in the crust of
    neutron stars, and establish the scientific
    foundation for innovative applications of nuclear
    science to society.
  3. We recommend a targeted program of experiments to
    investigate neutrino properties and fundamental
    symmetries. These experiments aim to discover
    the nature of the neutrino, yet unseen
    violations of time-reversal symmetry, and other
    key ingredients of the new standard model of
    fundamental interactions. Construction of a Deep
    Underground Science and Engineering Laboratory is
    vital to US leadership in core aspects of this
    initiative.
  4. The experiments at the Relativistic Heavy Ion
    Collider have discovered a new state of matter at
    extreme temperature and density - a quark-gluon
    plasma that exhibits unexpected, almost perfect
    liquid dynamical behavior. We recommend
    implementation of the RHIC II luminosity upgrade,
    together with detector improvements, to determine
    the properties of this new state of matter.

13
LRP Recommendation 1
  • We recommend the completion of the 12 GeV Upgrade
    at Jefferson Lab. The Upgrade will enable new
    insights into the structure of the nucleon, the
    transition between the hadronic and quark/gluon
    descriptions of nuclei, and the nature of
    confinement.
  • A fundamental challenge for modern nuclear
    physics is to understand the structure and
    interactions of nucleons and nuclei in terms of
    quantum chromodynamics. Jefferson Labs unique
    electron microscope has given the US leadership
    in addressing this challenge. Its first decade
    of research has already provided key insights
    into the structure of nucleons and the dynamics
    of finite nuclei.
  • Doubling the energy of this microscope will
    enable three-dimensional imaging of the nucleon,
    revealing hidden aspects of its internal
    dynamics. It will complete our understanding of
    the transition between the hadronic and
    quark/gluon descriptions of nuclei, and test
    definitively the existence of exotic hadrons,
    long-predicted by QCD as arising from quark
    confinement. Through the use of parity
    violation, it will provide low-energy probes of
    physics beyond the Standard Model, complementing
    anticipated measurements at the highest
    accessible energy scales.

14
Summary
  • Very successful outcome of LRP process, still a
    lot of work needed in writing the report. Provide
    all requested support.
  • Running the 6 GeV program will continue under
    serious pressure. Vocalize your concerns when you
    feel the need.
  • Have to start discussions about the form of the
    Hall A collaboration in the 12 GeV era
  • Congratulations to Joe Katych and Xaohui Zhan for
    their winning posters
  • All poster contributors are urged to provide
    copies of their posters
  • Please use your vote in the ongoing DNP
    nomination process
  • Support Curtis Meyer and Joerg Reinhold
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