hall a status hall a collaboration meeting dec 15, 2011 robert michaels acting hall a leader recent...
DESCRIPTION
PAC38 Results : Hall A NUMBERCONTACT PERSON TITLEDAYS REQUESTED DAYS AWARDED SCIENTIFIC RATE PAC DECISION PR R. Michaels PREX-II Precision Parity-Violating Measurement of the Neutron Skin of Lead 35 A Approved PR H. Gao SOLID-H(T) Target Single Spin Asym in SIDIS (e,e'π ± ) on a Transversely Polarized Proton Target 120 C2 (target design) PR I. PomerantzHard Photodisintegration of 3 He into pp and pn pairs 10 Reject PR P. Solvignon. Precision measurement of the isospin dependence in the 2N and 3N short range correlation region 19 A-Approved C B. Wojtsekhowski Measurement of Semi-Inclusive Pion and Kaon electroproduction in the DIS Regime on a Transversely Polarized 3He Target using the Super BigBite and BigBite Spectrometers in Hall A 64 A-Approved E C. Hyde Measurement of Electron-Helicity Dependent Cross Sections of Deeply Virtual Compton Scattering with CEBAF at 12 GeV 100 A Grade, time E H. Gao. SOLID-He3(T) An update to PR : Target Single Spin Asymmetry in Semi-Inclusive Deep- Inelastic Electro Pion Production on a Transversely Polarized 3He Target at 8.8 and 11 GeV 90 A Grade, time E J. Huang. SOLID-He3(L) Asymmetries in Semi-Inclusive Deep- Inelastic Electro-Production of Charged Pion on a Longitudinally Polarized He-3 Target at 8.8 and 11 GeV 35 A Grade, time New proposals Returning proposals -- was Conditional (C) or up for a grading Aug 2011TRANSCRIPT
Hall A Status Hall A Collaboration Meeting Dec 15, 2011
Robert Michaels Acting Hall A Leader
• Recent Activity
• Future Projects
• Scheduling Process
• Publications
• Borrel: Thursday at 6 pm in A110 give $9 to either me, Stephanie, or Doug
Recent Activity in Hall A (2011)
May 13 Finished a series of experiments , started 6 mo. shutdown, install g2p/GEp
August PAC38 -- 4 new proposals, SBS SIDIS approved, 3 proposals graded ( next slide)
Oct 13-14 Review of SuperBigbite Spectrometer (SBS) by DOEfavorable on science and technology.needed work on project management, cost, schedule.
revised proj. mgt. plan (PMP) -- John LeRose -- due Jan.
Oct – now g2p /GEp polarized target: Failure of superconducting magnet (shorts to ground).
Decide : retrofit a magnet from Hall B, ready Feb 2012 Plan: reduced run of g2p/GEp Feb – May 2012 covering essential low-Q2 run plan.
+ 1 wk. commissioning run (w/o target) Dec (starting now).
PAC38 Results : Hall ANUMBER CONTACT
PERSONTITLE DAYS
REQUESTEDDAYS
AWARDEDSCIENTIFIC
RATEPAC
DECISION
PR12-11-101 R. MichaelsPREX-II Precision Parity-Violating Measurement of the Neutron Skin of Lead
35 35 A Approved
PR12-11-108 H. GaoSOLID-H(T) Target Single Spin Asym in SIDIS (e,e'π±) on a Transversely Polarized Proton Target
120 C2(target design)
PR12-11-104I. Pomerantz Hard Photodisintegration of 3He into pp and pn
pairs10 Reject
PR12-11-112 P. Solvignon .Precision measurement of the isospin dependence in the 2N and 3N short range correlation region
19 19 A- Approved
C12-09-018 B. WojtsekhowskiMeasurement of Semi-Inclusive Pion and Kaon electroproduction in the DIS Regime on a Transversely Polarized 3He Target using the Super BigBite and BigBite Spectrometers in Hall A
64 64 A- Approved
E12-06-114 C. HydeMeasurement of Electron-Helicity Dependent Cross Sections of Deeply Virtual Compton Scattering with CEBAF at 12 GeV
100 100 A Grade, time
E12-10-006 H. Gao . SOLID-He3(T) An update to PR12-09-014: Target Single Spin Asymmetry in Semi-Inclusive Deep-Inelastic Electro Pion Production on a Transversely Polarized 3He Target at 8.8 and 11 GeV
90 90 A Grade, time
E12-11-007 J. Huang .SOLID-He3(L) Asymmetries in Semi-Inclusive Deep-Inelastic Electro-Production of Charged Pion on a Longitudinally Polarized He-3 Target at 8.8 and 11 GeV
35 35 A Grade, time
New proposals
Returning proposals -- was Conditional (C) or up for a grading
Aug 2011
Uva/Jlab Polarized NH3 Target
Low Q2 gp2 and GE
p Experiments (6 GeV)
Scheduled Feb - May 2012 pending target repairs
test run Dec 13 – 22
Modified Beamline in Hall A
0.02 < Q2 < 0.40 GeV2
Jian-Ping ChenA. CamsonneK. SliferD. CrabbR. GilmanG. RonD. DayA. SartyJ. Arrington
• Chicane Magnets
• Septum
• Low-current Monitors
• Local Beam dump
• Slow Raster
Schedule : Hall A
2011 2012 2017
g2p/GEp 12 mo. Shutdown Early 12 GeV
Experiments
12 GeV Commissioning
SuperBigbite
MOLLER
SOLIDPhysics Beam to Hall A
Thomas Jefferson National Accelerator Facility
2013 2014 2015 2016 2017 2018 2019 2020 2021calendar year
12 GeV Planning CommitteeRon Gilman (chair), Javier GomezDouglas Higinbotham, Charles HydeNilanga Liyanage, Kent Paschke
SuperBigbite
MOLLER
Have not produced a publication -- exceed the avg time (31 months) to the first: • E97-110 forward GDH (Vince Sulkosky -- working on a draft) • E05-004 A(Q) (Ron Gilman) • E04-018 3,4He elastic (Makis Petratos )• E97-111 4He(e,e'p) (Doug Higinbotham)• E00-102 16O(e,e'p) (Kevin Fissum) • E06-007 208Pb(e.e'p) (Konrad Aniol) • E05-110 CSR (Jian-Ping Chen)
Overdue archival publications • GDH (Karl Slifer, Zein-Eddine Meziani), • HAPPEX-II (Bob Michaels , David Armstrong) • 3He(e,e'p) (Fatiha Benmokhtar) • A,B(Q2) (Makis Petratos)
Comments on archival publications• They are a history of what we did, with sufficient detail to reproduce the results.• 12 Month Shutdown: you have more time to write.• They help your grant !
Reminder About Overdue Publications
Hall A Publications in 2011
S. Abrahamyan, et.al. Search for new gauge boson in the A‘ Expt (APEX). Phys. Rev. Lett 107:191804, 2011
J. Huang, et.al. Beam-Target Double Spin Asymmetry A_LT in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized He-3 Target at 1.4 < Q2 <2.7 GeV2. arXiv:1108.0489 [nucl-ex] K. Paschke, et.al. New Precision Limit on the Strange Vector Form Factors of the Proton. arXiv:1107.0913 [nucl-ex] X. Qian, et.al., Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized 3He Target. Phys.Rev.Lett.107:072003,2011
G. Ron et al. Low Q2 measurements of the proton form factor ratio $mu_p G_E / G_M$. arXiv:1103.5784 [nucl-ex] A.J.R. Puckett, et.al., Reanalysis of Proton Form Factor Ratio Data at Q2 = 4.0, 4.8, and 5.6 GeV2 arXiv:1102.5737 [nucl-ex]
S. P. Malace, et.al. A precise extraction of the induced polarization in the 4He(e,e'p)3H reaction Phys.Rev.Lett.106:052501,2011
E. Fuchey, et.al., Exclusive Neutral Pion Electroproduction in the Deeply Virtual Regime Phys.Rev.C83:025201,2011
J. Glister, et.al. Polarization Obs in Deuteron Photodisintegration below 360 MeV Phys.Lett.B697:194-198,2011.
G.D. Cates, et.al., Flavor decomposition of elastic nucleon E&M form factors Phys.Rev.Lett.106:252003,2011
X. Zhan et al. Proton Elastic FF Ratio at low Q2 Phys. Lett. B705 59 (2011)
M. Friend, et.al.. Upgraded photon detector with integrating readout arXiv::1108:3115 [nucl-ex] S. Ban et.al.. Parity Violating Electron Scattering Measurements of Neutron Densities J. Phys. G39 014104 , 2012L. B. Weinsten, et.al., Short Range Correlations and the EMC Effect Phys. Rev. Lett. 106: 052301, 2011
J. Arrington et al. Short-Range Nucleon-Nucleon Correlations arXiv:1104.1196 [nucl-ex]M. Meziane et al. Effects Beyond Born in Pol. Transf. Obs. ep Elastic Phys. Rev. Lett 106. 132501, 2011
S. Abrahamyan, et.al. Neutron Radius of 208Pb (PREX) about to submit to PRL S. Abrahamyan, et.al. Transverse Asymmetries from H, 4He, 12C, and 208Pb about to submit to PRL
Publications : ~18 this year. Timely publications and Archival Papers are important !
g2p / GEp is starting
Bright future for the 12 GeV era
See you at the Borrel (Thurs 6 pm in A110)
Summary : Hall A Status
R. MichaelsHall A Collab. Mtg. Dec 15, 2011