A1nd2n-ERR

ERR Committee Members

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

Charge

• Charge for the Committee

Preliminary Agenda

Monday March 19, 2018

Room: Cebaf Center L102

NOTICE: The wiki's file handling is broken at the moment (CCPR has been entered), so we'll have to do this in a few steps.

Presenters:  You will need to copy your talk to this directory:
               /group/hallc/www/hallcweb/html/experiments/A1n/meetings/ERR_Talks/
             And then update the link in the agenda below by logging into the wiki, clicking the 'Edit' link
             next to 'Preliminary Agenda' and replacing the 'TBD.pdf' file name associated with your talk below
             to the filename you used.
             
Email your talk to Brad S or Xiaochao Z. if you have any problems.   

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	(TBD) 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)

• E12-06-121 (d2n-g2n) Proposal for PAC30
• E12-06-121 (d2n-g2n) Update for PAC36 (Grading PAC) - Approved for 29 PAC days. Updated to accommodate planned improvement in Target FoM.

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

• Pol_3He_Elastic_Measurement
• 3He Form Factor Double-Polarization Asymmetry Measurement Proposal

Additional Documentation

Polarized He3 Target

Polarized 3He OSP

COO, ESAD and OSPs

• COO draft
• ESAD draft
• Moller-related drafts: Moller Operation Manual Moller OSP Hall C ODH Analysis with Moller Task Hazard Analysis
• Polarized 3He Target OSP (to be posted)

General Hall C Documentation

• Hall C Standard Equipment Manual
• Emergency Response Guidelines