Log entry time 10:09:23 on January20,2009

Entry number 256907

Run Coordinator Report for Jan 19, 2009:

# Polarity status of the spectrometers: BigBite -ve (for e-), L-HRS +ve (for &pi+)

# &pi+Vertical  mode with the half-wave-plate IN

Charge Accumulated Summary So Far



                     Half Wave Plate     Charge Expected (C)  Charge Accumulated (C)   Comment

&pi- Vertical             IN                       3.5               0.86                 -

&pi- Vertical             OUT                      3.5               4.04                 Done   



&pi-Transverse            IN                       3.5               0.62                 -

&pi- Transverse           OUT                      3.5               4.38                 Done   



&pi+ Vertical             IN                       3.5               3.99                 Currently here

&pi+ Vertical             OUT                      3.5               3.72                 Done   



&pi+ Transverse           IN                       3.5               4.5                  Done

&pi+ Transverse           OUT                      3.5               3.66                 Done  



Overall Plans

1. Will stay at &pi+ Vertical mode until Thursday Morning.

2. Will do Moller measurement later today or tomorrow.

3. Will do positron runs on Thursday (Jan 22) Day/Swing and Swing/Owl(Friday) where



   Day/Swing [starting 08:00]: BigBite +ve polarity and L-HRS +ve

   Swing/Owl [starting 17:00]: BigBite +ve polarity and L-HRS -ve



4. Friday 08:00: BigBite will be back to -ve polarity, L-HRS stays at -ve polarity.



Activities

- Smooth production on polarized 3He at Vertical mode.

- Compton rate has been pretty good most of the time but goes worse sometimes in the Swing.

  It will be taken care of during tomorrow's beam study time.



Beamtime Accounting:

         ABU        BANU    BNA   Comment

Owl      7.17       0.15    0.68

Day      7.22       0.50    0.29   DAQ crash 

Swing    6.94       0.40    0.68