HALLA STATUS REPORT

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HALL-A STATUS REPORT

• Hall A Collaboration Meeting
• December 16-17, 2004
• KEES DE JAGER
• JEFFERSON LABORATORY

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GENERAL INFORMATION

• Significant progress on archival papers
• E91-010 HAPPEx-I published
• E89-003 16O(e,ep) published
• E99-117 A1n published
• E95-001 GMn circulating
• E93-027 GEp resubmission circulating
• Waiting on E91-026 (A and B)
• Central repository of figures on Hall A webpage
• Please submit figures of all publications to Rob
  Feuerbach
• Physics Division Xmas party Tuesday, Dec 21 at 1
  pm (sign up with Heather 5)
• Borrel ARC 231-233, Thursday 530-8 p.m.
• sign up with Heather
• last persons clean up before leaving

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Hall A Approved Proposals PAC 4-26

• 31 Experiments completed
• Backlog 3.5 years (annual average for Hall A is
  90 days)

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Proposals submitted to PAC27

• Jeopardy
• PR05-002 gn -gt p-p in 2H, 4He and 12C D.
  Dutta 11.5
• PR05-004 A(Q) at low Q in ed elastic
  scattering R. Gilman 6
• New
• PR05-007 Parity violating DIS in polarized eD X.
  Zheng 46
• PR05-009 High-resolution study of nK B.
  Wojtsekhowski 23
• PR05-010 Structure of Roper resonance S.
  Sirca 14.5
• PR05-013 Search for bound q Nuclei R.
  Feuerbach 9
• PR05-014 Neutron-tagged proton structure N.
  Liyanage 18
• PR05-015 Traget SSA in quasi-elastic polarized
  3He T. Averett 28
• PR05-016 Measurement of F2n/F2p from 3H/3He M.
  Petratos 35
• Total 191
• Allocation (3558) 48

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Septum Magnets

• Right septum can run at 60-65 µA
• Left septum quenched at 30 µA
• After opening up the upper half, paper tissue and
  tape was found (and removed) in the helium lines
• It will be cooled down during the February down
• A sweep magnet is being constructed for HAPPEx
  which is expected to reduce heat deposition by
  factor 2-4
• Next test can septa run with 100 µA on 20 cm LH2
  (for HAPPEx)?

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Scheduled Experiments in Hall A

• Exp Title Spokespersons
• Nov/Dec Installation of Big Bite
• Jan-Apr E01-015 Studying the Internal
  Small-Distance Structure of W. Bertozzi, E.
  Piasetzky,
• Nuclei via the Triple Coincidence
  12C(e,epN) J. Watson, S. Wood
• May Installation of septa
• Jun E94-107 High-Resolution 1p-Shell
  Hypernuclear Spectroscopy S. Frullani, F.
  Garibaldi
• Jul-Nov E99-115 Constraining the Nuclear
  Strangeness Radius in PVES K. Kumar, D. Lhuillier
• E00-114 Parity Violation from 4He at Low Q2
  D. Armstrong, R. Michaels
• A Clean Measurement of Rho
• Dec-Feb Installation of polarized 3He target and
  Big Bite
• Mar-May E02-013 Measurement of GEn at High
  Q2 G. Cates, K. McCormick,
• B. Reitz, B. Wojtsekhowski
• Jun Back to standard configuration
• E04-018 Elastic scattering off 3,4He
• E03-105 Polarization transfer in 4He(e,ep)

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Summary

• Hall A research program vibrant
• Many exciting new results
• Good progress on archival publications
• Septum magnets are (finally!) operational
• Scheduling for next five years will be difficult
• CD-0 for 12 GeV approved, but next 4-6 months
  essential to obtain CD-1 approval
• Keep up the good work!