The Big Family Readiness Review

1st Run Period: Threshold Pion Production2nd Run Period: Transversity & d2n3rd Run Period: Ay & 3He(e,e’d)

“Why are we having this review?”- John Domingo

E04-007: Threshold Pion Production

• Left HRS @ 12.5 - 50 Negative (Right Arm Not Required)

• Cryo-target 20 cm race track plus new 4 cm pancake target

• BigBite with Wirechamber Hadron Package (40 - 60)– two wire-chambers (one upgraded)– dE/E trigger scintillators– updated frame & cabling

• 4He Bag System

E06-010 & 11: Transversity• Left HRS @ 16 - 75 (S1, S2M, A1, RICH, Gas Cherenkov, Pion

Rejector)

• BigBite @ 30 with Electron Package – three wirechambers (two chambers from Hadron package)

– upgraded preshower & shower (scope pending funding)– new gas Cherenkov (critical for d2)– GEN timing scintillators

• Polarized 3He Target System– transverse field coils– large diameter exit beam pipe

• Fastbus for Chamber Readout

E06-014: d2n• Left HRS @ 30 - 70 (S1, S2M, A1, Gas Cherenkov,

Pion Rejector)

• BigBite @ 45 with Electron Package – detectors the same as Transverity

• Polarized 3He Target System– change to in-plane polarization

E05-015: Ay

• The Big Hop (Left HRS and BigBite Trade Places)

• Left HRS @12.5 - 20 with Negative Polarity• Right HRS @12.5 - 20 with Negative Polarity• BigBite with neutron detector for testing @ large angle

• Polarized 3He Target System– nominal exit beam-line

E05-102: 3He(e,e’d)

• Left HRS @ 15- X with Negative Polarity• Right HRS @ 12.5 with Negative Polarity• BigBite with Hadron Package & Hall A Neutron Detector @ 70– system check during E05-015

• Polarized 3He Target System

Schedule and Milestones• 2007-04 Group DAQ Layout Finished• 2007-06 DAQ Completed and Tested• 2007-07 Begin PreShower / Shower Upgrade

– Scope of Upgrade Still Pending Funding – Project Defined By April 1st

• 2007-07 Install Chambers In Hadron Package• 2007-09 Complete Hadron Package Testing• 2007-10 Submit FY08 Requisitions For Transversity & d2

– Local Construction Items– Cherenkov Gas

• 2007-12 Complete Electron Package Testing– Must Have Chambers Back In Hadron Package Before

Christmas • 2008-01 Install Threshold Pion Experiment• 2008-03 Install Transversity & d2n Experiments• 2008-04 Complete Neutron Detector Veto• 2008-07 Install Ay & 3He(e,e’d) Experiments (The Big

Hop)

Information Posted On The Internet