GEn_stat_12-05Hall A Collaboration Meeting

December 5-6, 2005

Status Report: GEnG. Cates, K. McCormick, B. Reitz, and B. Wojtsekhowski;

spokespersons

John J. LeRose

GEn_stat_12-05Hall A Collaboration Meeting

December 5-6, 2005

Large Scale Experiment• Polarized Target/Beam • Neutron Arm• BigBite with detectors

Scheduled to run: Feb. 24-May 10, 2006

GEn_stat_12-05Hall A Collaboration Meeting

December 5-6, 2005

GEn_stat_12-05Hall A Collaboration Meeting

December 5-6, 2005

Neutron Arm

Combined weight of modules and shielding ~83 tons

GEn_stat_12-05Hall A Collaboration Meeting

December 5-6, 2005

Polarized 3HeTarget

Using new “hybrid” cells

• 7-8 working cells in-hand

• 4 cells P ≥ 50% in the lab (53% max)

•Short spin-up time implies reduction of P by beam will be small

GEn_stat_12-05Hall A Collaboration Meeting

December 5-6, 2005

Project Milestones• Nov 15 -- completion of ND testing -done• Nov 18 -- laser safety review -done• Nov 28 -- first day of down, completion of ND testing, begin decabling. –done• Dec 5 – Begin moving BigBite detector package, electronics, and cables (on

track)• Dec 15 -- full safety review for GEn (include beamline testing with conclusion

of rupture tests) (Committee selected and scheduled for December ?)• Dec 15 -- target motion system working on test bench • Dec 15-- septum off pivot, begin moving neutron arm • Jan 2 -- target testing complete, dissassemble target, ready to move into the

Hall• Jan 16 -- install Big Bite stand • Jan 27 -- operational checkout of polarized target • Feb 9 -- Big Bite operational checkout • Feb 15 -- target button up • Feb 17 – Laser safety inspection• Feb 22 -- neutron arm complete with shielding

GEn_stat_12-05Hall A Collaboration Meeting

December 5-6, 2005

Thursday 12/1/05

GEn_stat_12-05Hall A Collaboration Meeting

December 5-6, 2005

Outlook

• Detector testing and installation are on-track

• Expected beam and target polarizations are better than anticipated in the original proposal (86% and 50% vs. 75% and 40%)

• Much work remains, any and all help will be greatly appreciated

• It’s not too soon to signup for shifts