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User name Jin
Log entry time 10:36:07 on January 22, 2009
Entry number 257282
This entry is a followup to: 257272
keyword=Target Status During Positron RunningTarget is keeping pumping with 2 Comet laser and 1 FAP laser. 3rd comet laser are reserved for test during the day time. And shall be put back during the night.
Fiber temperature read back are 56C 63C 56C 52C 53C; tip temperature are 66C. Laser spectrum is screen shot as figure 1
Holding Field are adjusted to compensate fringe field from Bigbite magnet with positive polarity. The calculated value is based on extrapolation of field mapping data for negative state of Bigbite and bigbite OFF. The extrapolation error would cause screw effect and reduce the polarization.
And NMR is performed to confirm target polarization (fig 2). The estimation is 40~50%.
Fake spin flip signal is sent to DAQ.
A copy of this log entry has been emailed to: yqiang, jpchen
Figure 1
Figure 2
