TILTED (low field) Moller Target
The beam energy is ~6054MeV(accel), 1000.0MeV(linac), 112.85MeV(injector).
Injector angle is 0.0o (0.0o, 0.0o flipper).
IHWP wave plate was OUT. Passive HWP was OUT. Raster was OFF.
Q1=-136.56A(-23763), Q2=0A(246), Q3=82.48A(13355), Q4=136.73A(22318), Dipole=337.33A(1674620).
Helicity frequency=30Hz, delay=8windows, pattern=Quartet.
21:23-22:08 (Runs 15570-15575) - detector HV tuning.
Runs 15576-15605 - Beam polarization measurement different targets.
Runs 15599-15600 - Al target (non polarized).
Run 15601 - No target (beam in between tergets 2 and 3).
Runs 15607-15610 - Target 3, 1kHz helicity frequency.
Runs 15611-15613 - Target 5, 1kHz helicity frequency.
Runs 15614-15615 - Target 5, 30Hz helicity frequency.
4:00 Moller target is parked, Moller target movement is unmasked. Moller dipole is OFF, quads settings are restored.
| Runs | Target | B.cur, uA | Motor steps | BOP | Polarization % | Chi2 | Comments |
| 15574-15584 | 5 | 0.48 | 4.049/0.248 | 8.0 | -55.96+/-0.26 | 0.8 | - |
| 15585-15590 | 4 | 0.48 | 10.10/0.248 | 8.0 | -55.08+/-0.21 | 1.9 | - |
| 15591-15594 | 3 | 0.33 | 16.13/0.248 | 8.0 | -53.73+/-0.24 | 2.5 | - |
| 15595-15598 | 2 | 0.24 | 22.13/0.248 | 8.0 | -55.29+/-0.19 | 4.5 | - |
| 15599-15600 | 1 | 0.24 | - | 8.0 | 0.0004+/-0.0007 | Asymmetry | Al target |
| 15601 | 0 | 0.24 | - | 8.0 | 0 | - | No target |
| 15602-15605 | 3 | 0.24 | 16.18/0.248 | 8.0 | -54.29+/-0.31 | 0.8 | - |
| 15607-15610 | 3 | 0.24 | 16.18/0.248 | 8.0 | -51.77+/-0.41 | 11.2 | 1kHz |
| 15611-15613 | 5 | 0.24 | 3.95/0248 | 8.0 | -55.47+/-0.50 | 6.0 | 1kHz |
| 15614-15615 | 5 | 0.24 | 3.95/0.248 | 8.0 | -56.71+/-0.39 | 14.3 | 30Hz |
| Average | 2-5 | - | - | 8.0 | -55.03+/-0.11 | 14.7 | - |
The Moller Log Book scan is given here .
The table with detailed information is given
here and here .
Plots with beam position and beam energy instability are:
BPMs and Energy .
Dipole correction result with new corrector is on the plot .
For additional information see halog entry 388633 .
The final results:
Pz=(-55.03 +/- 0.11(stat)) % Average
The plot is given here .
The beam energy is ~7375MeV(accel), 909.09MeV(linac), 102.27MeV(injector).
Injector angle is +21.6o (0.0o, 0.0o flipper).
IHWP wave plate was OUT. HWP#2 was IN. Rotatable HWP was OUT. Raster was OFF.
Q1=-196.9A(-33997), Q2=-92.6A(-16101), Q3=+97.9A(+15770), Q4=208.2A(33454), Dipole=399.A(1781806).
Helicity frequency=30Hz, delay=0windows, pattern=Quartet.
Moller settings tuning took ~1 hour (14:00 - 15:00)
15:00-15:45 (Runs 15645-15652) - detector HV and threshold tuning.
Runs 15653-15665 - Beam polarization measurement with targets #5, 4 and 3.
Beam energy and position were unstable.
16:42-17:40 and 18:15-20:00 - long periods with no beam.
20:00 Moller target is parked, Moller target movement is unmasked. Moller dipole is OFF, quads settings are restored.
| Runs | Target | B.cur, uA | Encoders | BOP | Polarization % | Chi2 | Corrected | Comments |
| 15653-15658 | 5 | 0.50 | 1.039/1.374 | 8.0 | +87.29+/-0.44 | 1.84 | +85.59 | - |
| 15659-15664 | 4 | 0.43 | 1.675/1.377 | 8.0 | +84.09+/-0.41 | 4.73 | +82.46 | - |
| 15665 | 3 | 0.43 | 2.294/1.374 | 8.0 | +87.45+/-0.43 | - | +85.94 | - |
| Average | 3-5 | - | - | 8.0 | +86.19+/-0.25 | 20.5 | +84.58 | - |
The Moller Log Book scan is given here .
The table with detailed information is given
here and here .
Stripcharts with beam position and beam energy instability are:
BPMs and Energy .
For additional information see halog entry 3311958 .
The final results:
Pz=(+84.58 +/- 0.25(stat)+/-2.2(syst)) % Average
The plot is given here .
