Log entry time 08:23:31 on January19,2009

Entry number 256790

Run Coordinator Report for Jan 18, 2009:

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

# &pi+Transverse  mode before 10:00 with the half-wave-plate IN

# &pi+Vertical  mode after 14:00 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               2.56                 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-plus Vertical mode until Thursday Morning.

2. Will do Moller measurement either on Tuesday or Wednesday.

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



   Day/Swing [total one shift, starting ~11:00]: BigBite +ve polarity and L-HRS +ve

   Swing/Owl [total one shift, starting ~19:00]: BigBite +ve polarity and L-HRS -ve



4. Friday (Jan 23) Day: BigBite will be back to -ve polarity, L-HRS stays at -ve polarity.



Activities

- Production in &pi+ Transverse mode until 10:00.

- 10:00 starts target polarization change from Transverse to Vertical. 

  Also asked for opportunistic controlled access to do misc DAQ work 

  (L-HRS, RICH) in the hall.

- 13:50 Target work (Transverse to Vertical polarization change) finished, 

  asked for beam tuning for a Compton-quality.

- 14:30 Reference cell (H2) data taking starts

- 18:00 Production on polarizide 3He on TRANSVERSE mode starts and continues smoothly.



Beamtime Accounting:

         ABU        BANU    BNA   Comment

Owl      6.87       0.17    0.98  half an hour beam stop for MCC work

Day      2.65       4.36    1.00  Target polarztion state change (T->V), beam tuning.

Swing    6.61       1.14    0.28