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    User name Yi Zhang

    Log entry time 08:04:16 on November 6,2008

    Entry number 247113

    keyword=owl shift summay

    00:00 shift starts with Hydrogen reference run.
    00:40 end of run#2897, it is a good run, which has 2M events.
    01:24 end of run#2898, it has 152k events. MCC called us for beam tuning for Hall B, said the beam trip would take 30 mins.
    01:57 MCC send beam back. Kalyan started backgroud test for 40 mins, during which beam tri ped a lot. After that we started the hydrogen cross section check.
    03:37 we finished hydrogen cross section check, during which we forgot turn on bigbite wir
    e chamber in the first run. (Kalyan turned off it for high beam current in background chec k.) Later we re-took the data. Later we released the h2 in reference cell and put n2 in it
    (50 psi), paged Alex for RICH check, changed the momentun of LHRS to 600 MeV/c.
    04:02 Alex and Youcai started working on RICH.
    05:07 Alex and Youcai finished their job and we started switch to he3 cell.run.
    05:13 BB HV on chamber tripped 2 times, see log entry 247102, 247103 and # 247104. later w
    e made everyting go smoothly and start taking data. Jin find without correction coil, hold
    ing field is transverse+, one spin flip would lose 1% absolute polarization. However, our spin flip system worked perfectly.
    06:08 we started taking data on Happex daq.