Spin Duality on the neutron (3He)

The Experiment        Minutes          Polarized 3He Target

Analysis                     Shifts                  Technical Notes

Related Theses              Publications              Conferences

About this experiment

  1. Publications:1st paper on "Quark-hadron duality in neutron (3He) spin structure" was submitted to PRL on March 26, 2008. Click here to see the archive version.

  2. Proposal: full version

  3. Spokepeople: Nilanga Liyanage (University of Virginia), Jian-Ping Chen (TJNAF), Seonho Choi (University of Seoul)

  4. Graduate Student: Patricia Solvignon (Temple University)
    Thesis: "Measurement of the 3He Spin Structure Functions in the Resonance Region: A Test of Quark-Hadron Duality on the Neutron."

  5. Other Polarized  3He Experiments : E94-010 , E95-001 , E99-117, E97-103 and E97-110


  1. Weekly meetings:

    1. NMR analysis for E01-012 (Vince): August 2005   April 2005   March 2005   February 2005   January 2005   November 2004   September 2004

    2. Spin Duality analysis update (Patricia): click here

  2. Collaboration meetings: click here


  1. Run summaries:

    1. from runsheet:
      1. Commissioning, click here
      2. 3 GeV, click here
      3. 4 GeV, click here
      4. 5 GeV: Kin. 5, Kin. 6

    2. from halog_end_[nrun].epics:
      1. right arm, click here
      2. left arm, click here

    3. by configuration: click here. (not totally done yet)

  2. HALOG archives:

    1. January 2003, click here
    2. February 2003, click here

  3. Beam Polarization Info:

    1. Moller, click here and Moller webpage here
    2. Compton, click here

  4. Target summary:

    1. polarization and test summary: on-line (last update: 02/14/05), new (last update: 03/01/05),

Technical notes

  1. E01-012 Analysis reports:

    1. PID Detector Calibration for E01-012: (.ps), (.pdf)
    2. PID Efficiency for E01-012: (.ps), (.pdf)
    3. Study of the acceptance cut effect on the cross section for E01-012: (.ps), (.pdf)
    4. Scintillators and VDC efficiencies for E01-012: (.ps), (.pdf)
    5. Target density during E01-012: (.ps), (.pdf)
    6. Target polarization from EPR polarimetry during E01-012: (.ps), (.pdf)
    7. Estimate of the total radiation lengths during E01-012: (.ps), (.pdf)
    8. Nitrogen cross sections and dilution factor for 1.0 < Q2 < 4.0 (GeV/c)2 : (.ps), (.pdf)
    9. Target density from pressure curves for E01-012 : (.ps), (.pdf)
    10. By V. Sulkosky: Cell Characteristics, the NMR System and Analysis for E01-012 : in progress

  2. E94-010 technical notes, click here

  3. Hall A technical notes, click here


  1. Taking shift:
    1. Run plan, click here
    2. Shift Schedule, click here
    3. Sign up for shift, click here
    4. How to become a Target Operator, click here
    5. Target operator ON CALL, click here
    6. Frequently asked questions: Masing effect      EPR

  1. Runsheet and checklists:
    1. Runsheet, click here
    2. Shift checklist, click here
    3. Control access checklist, click here
    4. EPR checklist, click here

  1. On-Line Analysis: click here

  1. Shift crew helper, click here
  2. How to turn on the gradient coils, click here

  1. Training requirements:
    1. Training requirements, click here
    2. Safety Walkthrough Information, click here

The Polarized  3He Target

  1. Target Logbook: click here

  2. Safety Procedures and requirements:
    1. Polarized  3He target operational safety procedure (.ps) (html)
    2. Laser Eye Examination, click here

  3. The polarization principle:
    1. Optical Pumping:
    2. Laser setup: Optics setup , EEL target lab safety

  4. Polarimetries:
    1. NMR system, click here
    2. EPR:
      1. Operator Procedure (.ps) (html)
      2. Optics, click here
      3. Technical notes:     Guide for EPR measurement at Jlab, M. Liang (.ps)
                                         Brief introduction for EPR measurement, M. Liang(.ps)
                                         Technical Note on EPR, W. Korsch (.ps)

  5. Cell informations:
    1. From EEL target lab, click here for general infomation, and here for the wall thickness data (tested by V. Sulkosky).
    2. Cell information from University of Virginia, click here

  6. Other Polarized  3He Target Labs:
    1. Temple University Polarized  3He Target Lab, click here
    2. Spin Physics with Polarized Noble Gases, University of Virginia, click here
    3. W&M   Polarized  3He Cell Production Lab, The College of William and Mary, click here

Related thesis

  1. E97-103: "A Search for Higher Twist Effects in the Neutron Spin Structure Function gn2(x,Q2)"
    1. Kevin Kramer, College of William and Mary (2003); click here

  2. E99-117: "Precision Measurement of Neutron Spin Asymmetry An1 at large xBj using CEBAF at 5.7 GeV"
    1. Xiaochao Zheng, Massachusetts Institute of Technology (2002); click here

  3. E94-010: "Measurement of the Neutron (3He) Spin Structure Function at Low Q2 : A Connection Between the Bjorken and Drell Hearn Gerasimov Sum Rules"
    1. Karl Slifer, Temple University (2004); click here
    2. Pibero Djawotho, College of William and Mary (2002); click here
    3. Ioannis Kominis, Princeton University (2001); click here
    4. Alexandre Deur, Universite Blaise Pascal (2000); click here
    5. John Steffen Jensen, California Institute of Technology (2000); click here

  4. E154 at SLAC: "Precision Measurement of the Neutron Spin Structure Functions":
    1. David Reyna, The American University (1998); click here
    2. Todd Smith, The University of Michigan (1998); click here
    3. Yury Kolomensky, University of Massachusetts (1997); click here
    4. Mikhail Romalis, Princeton University (1997); click here

  5. E143 at SLAC: "Measurement of Spin Structure Function g1 for the Proton and the Deuteron in the Resonance Region":
    1. Paul Raines, University of Pennsylvania (1996); click here


  1. From Polarized 3He Collaboration:

    1. "The Q2 evolution of the generalized Gerasimov-Drell-Hearn integral for the neutron using a 3He target", M. Amarian et al., Physical Review Letters 89, 242301-1 (2002)
    2. "Precision measurement of the neutron spin asymmetry An1 and spin-flavor decomposition in the valence region", X. Zheng et al., Physical Review Letters 92, 012004-1 (2004)
    3. "Q2 evolution of the neutron spin structure moments using a 3He target", M. Amarian et al., Physical Review Letters 92, 022301-1 (2004)
    4. "Measurement of the generalized forward spin polarizabilities of the neutron", M. Amarian et al., Physical Review Letters 93, 152301-1 (2004)
    5. "Experimental determination of the evolution of the Bjorken integral at low Q2", A. Deur et al., Physical Review Letters 93, 212001-1 (2004)
    6. "Precision measurement of the neutron spin asymmetries and spin-dependent structure functions in the valence quark region", X. Zheng et al., Phys. Rev. C 70, 065207 (2004)

  2. Related to Spin duality:

    1. Theory

      1. Scaling, duality, and the behavior of the resonances in inelastic electron-proton scattering, E.D. Bloom and F.J. Gilman, (19 October 1970), Physical Review Letters
      2. Quantum chromodynamics and Bloom-Gilman duality, C.E. Carlson and N.C. Mukhopadhyay, (1 April 1990), Physical Review D
      3. Duality in the inelastic structure function and the disappearing Delta-resonance, C.E. Carlson and N.C. Mukhopadhyay, (1 March 1993), Physical Review D
      4. Leading-Log effects in the resonance electroweak form factors, C.E. Carlson and N.C. Mukhopadhyay, (20 February 1995), Physical Review Letters
      5. Parton-hadron duality: resonances and higher twists, X. Ji and P. Unrau, (1 July 1995), Physical Review D
      6. Spin-dependent twist-four matrix elements from g1 data in the resonance region, X. Ji and W. Melnitchouk, (1 July 1997), Physical Review D
      7. Bloom-Gilman duality in the resonance spin structure functions, C.E. Carlson and N.C. Mukhopadhyay, (5 October 1998), Physical Review D
      8. Quark-Hadron Duality in electron scattering, W. Melnitchouk, (26 october 2000), hep-ph/0010311
      9. Quark-Hadron Duality in structure functions, N. Isgur, S. Jeschonnek, W. Melnitchouk and J.W. Van Orden, (9 April 2001), hep-ph/0104022
      10. Local duality predictions for x~1 structure functions, W. Melnitchouk, (7 June 2001), hep-ph/0106073
      11. Quark-Hadron Duality and the Nuclear EMC Effect, W. Melnitchouk, K. Tsushima and A.W. Thomas, (4 March 2002), hep-ph/0110071
      12. Quark-Hadron Duality: resonances and the onset of scaling, W. Melnitchouk, (24 June 2001), hep-ph/0106262

    2. Spin independent structure functions

      1. Evidence for valencelike Quark-Hadron Duality, I. Niculescu et al., (7 August 2000), Physical Review Letters
      2. Experimental verification of Quark-Hadron Duality, I. Niculescu et al., (7 August 2000), Physical Review Letters


UGM05: The Challenges of QCD and the Opportunities of 12 GeV Upgrade, Spin Structure of the Neutron (3He) in the resonance region, Patricia Solvignon , (June 2005).

First Workshop on Quark-Hadron Duality and the Transition to pQCD, Neutron (3He) spin structure in the resonance region, Patricia Solvignon , (June 2005).

DIS 2005, New Results on Testing Duality in Spin Structure from Jefferson Lab, Nilanga Liyanage , (April 2005).

HiX 2004, Spin duality in the nucleon: Measurements at JLab, Nilanga Liyanage (presented by Jian-Ping Chen), (August 2004).

GDH 2004, Neutron Spin Structure in the Resonance Region and Quark-Hadron Duality, Patricia Solvignon, (June 2004).

APS meeting, Neutron Spin Structure in the Resonance Region and Quark-Hadron Duality, Patricia Solvignon, (April 2003).

GDH 2002, The JLAB Polarized 3He Target, Karl Slifer, (July 2002). Click here

Patricia Solvignon
Last modified: Fri Dec 18 15:15:14 EST 2009