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User name O.Glamazdin
Log entry time 23:03:47 on October 03, 2010
Entry number 333535
keyword=Moller resultsMoller results on October 03, 16:00 - 23:00
- Crew: Jixie, Roman, Sasha
- Wien filter angle is 29.2°
- The raster was ON 3*3MCC units.
- The half wave plate was OUT.
- Old DAQ calorimeter threshold was 260mV.
- Old DAQ aperture delays were 22nsec.
- Beam was straight.
- Helicity frequency: 120Hz, pattern: quartet, delay: 8 windows.
- Energy lock in Arc1 was used. The beam energy was ~5564.7MeV.
- Beam polarization correction due to the beam energy fluctuation is needed.
- Run 14787 - Aperture Left234 and Right234 HV OFF.
- Runs 14788-14809 - The beam polarization measurement with using of four different Moller targets.
- Runs 14806-14830 - Target 4(10um) saturation test.
- 22:15 Reboot the Moller SC magnet. Magnet quench.
| # | Wien angle | beam | runs | target | Pbeam% | comments |
|---|---|---|---|---|---|---|
| 1 | 29.2° | 3.1 µA | 14788-14795 | 1 | 58.56±0.26 | +3.75T |
| 2 | 29.2° | 3.1 µA | 14796-14799 | 2 | 59.05±0.18 | +3.75T |
| 3 | 29.2° | 3.1 µA | 14800-14805 | 3 | 58.37±0.19 | +3.75T |
| 4 | 29.2° | 1.35 µA | 14806-14809 | 4 | 59.08±0.18 | +3.75T |
| Average | 29.2° | - | 14788-14809 | 1-4 | 58.81±0.10 | - |
| 5 | 29.2° | 1.35 µA | 14810-14813 | 3 | 59.98±0.18 | +3.5T |
| 6 | 29.2° | 1.35 µA | 14814-14818 | 3 | 58.29±0.17 | +3.25T |
| 7 | 29.2° | 1.35 µA | 14819-14822 | 3 | 58.30±0.19 | +3.0T |
| 8 | 29.2° | 1.35 µA | 14823-14826 | 3 | 57.25±0.19 | +2.75T |
| 9 | 29.2° | 1.35 µA | 14827-14830 | 4 | 47.53±0.18 | +2.0T |
A copy of this log entry has been emailed to: gen@jlab.org, brads@jlab.org, zahmed@jlab.org
Figure 1 Beam polarization with four Moller targets
