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ERR Committee Members

  • Pavel Degtiarenko
  • Alexandre Deur
  • Chris Keith (chair)
  • Renuka Rajput-Ghoshal
  • Bert Manzlak
  • Michael Tiefenback
  • Javier Gomez (observer)
  • Ed Folts (observer)



Committee Questions & Responses

  1. Questions from Committee (17 Mar 2018)
    1. Responses from Collaboration (18 March 2018)
  2. Follow-up from Collaboration (July 8, 2019)
    1. Updated Final Report from Committee (Aug. 1, 2019)

Agenda • Monday March 19, 2018

Room: Cebaf Center L102

Bluejeans Connection Info

Phone Dial-in
+1.408.740.7256 (United States)
+1.888.240.2560 (US Toll Free)
+1.408.317.9253 (Alternate number)
Global Numbers: http://bluejeans.com/numbers
Meeting ID: 850 126 485

Program • Cebaf Center L102

Time Agenda Item (Charge item addressed) Speaker Duration
8:30 Closed Session
9:00 A1n overview and running conditions (1, 2a) Xiaochao Zheng 10+5
9:15 d2n overview and running conditions (1, 2a) Brad Sawatzky 10+5
9:30 Polarized 3He target (2a, 2b, 3) Jianping Chen 30+10
10:10 Magnetic field calculations and compensation coils (3) Steve Lassiter/Gordon Cates 10+5
10:35 Beamline, Moller polarimetry (4, 2c) Dave Gaskell 15+10
11:00 Coffee Break
11:20 Installation Presentation [Schedule (MS Project)] [Schedule (PDF)] (5) Walter Kellner 15+10
11:45 Spectrometer and detector system (4) Brad Sawatzky 10+5
12:00 Beam commissioning and machine protection (6) Jay Benesch 10+5
12:15 Radiation levels outside and in the hall, and shielding (7) Jixie Zhang 10+5
12:30 A1n timeline, manpower, analysis and publication plan, documentation and summary (5,8,9) Xiaochao Zheng 10+5
12:45 d2n timeline, manpower, analysis and publication plan, documentation and summary (5,8) Brad Sawatzky 10+5
13:00 Lunch and executive session
16:00 Close-out

Polarized He-3 Proposals

E12-06-110 (A1n)

Measurement of the neutron spin asymmetry A1n in the valence quark region using a 11 GeV beam and a polarized 3He target in Hall C

  • E12-06-110 (A1n) proposal for PAC30 - detailed physics motivation and rates/uncertainties assuming the 6 GeV polarized 3He target performance
  • E12-06-110 (A1n) Update for PAC36 - in this update we used the stage-II target upgrade performance - approved for 36 PAC days
  • E12-06-110 (A1n) 2018 Update - in this update we summarize the rate and uncertainty estimation using the stage-I polarized 3He target and with the latest HMS and SHMS simulations, while keeping the total approved beam time (36 PAC days) unchanged. Some of the kinematic settings have been modified to reflect the latest status of the HMS or SHMS.

E12-06-121 (d2n-g2n)

E12-06-121A (Measurement of 3He Elastic Electromagnetic Form Factor Diffractive Minima Using Polarization Observables)

Additional Documentation


Moller-related (Drafts)

Polarized He3 Target (Draft)

General Hall C Documentation