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Beam Polarization: Raw Results

1998 raw resuts archive

1999 raw resuts archive

2000 raw resuts archive

2001 raw resuts archive

2002 raw resuts archive

2003 raw resuts archive

2004 raw resuts archive

2005 raw resuts archive

2006 raw resuts archive

2007 raw resuts archive

2008 raw resuts archive

Results 2009

Run type: 1 - measurement in point, 2 - transverse scan, 3 - longitudinal scan

E-06-010: Transversity experiment

• 13 January 2009 10:00 - 16:30. E.Chudakov, O.Glamazdin

  The beam energy is 5904MeV(accel), 583.5MeV(linac), 65.6437MeV(injector).
  Injector angle is 30^o, the 1/2 wave plate was IN.
  Injector Laser attenuation=80, Slit=18. Fast raster was ON.

  SPIN DANCE

  Tuning took 1h 10m. There was no energy lock..

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o.
  The error is statistical only. BPM01Y position is included

  Runs	Target	Type	T.Pos.	Encoder	BOP	Wien Filter	Polarization %	Chi2	Comments
  13055-13058	5	1	0.0	1.028/1.394	8.0	30o	-81.35+/-0.24	6.17	Thr=300mV B.cur=0.58uAmp
  13059-13060	5	1	0.0	1.028/1.394	8.0	30o	-80.74+/-0.34	2.96	B.cur=0.80uAmp
  13061-13064	5	1	0.0	1.028/1.394	8.0	50o	-90.49+/-0.24	0.78	B.cur=0.80uAmp
  13065-13068	5	1	0.0	1.028/1.394	8.0	70o	-88.58+/-0.21	7.60	B.cur=0.80uAmp
  13070-13073	5	1	0.0	1.028/1.394	8.0	-30o	-11.73+/-0.24	0.07	B.cur=0.80uAmp
  13074-13077	5	1	0.0	1.028/1.394	8.0	54o	-90.67+/-0.24	3.78	B.cur=0.80uAmp
  13079-13082	4	1	0.0	1.651/1.387	8.0	54o	-89.95+/-0.22	2.02	B.cur=0.80uAmp
  13083-13086	3	1	0.0	2.291/1.387	8.0	54o	-89.58+/-0.15	8.10	B.cur=0.55uAmp
  13087-13090	2	1	0.0	2.921/1.391	8.0	54o	-91.03+/-0.19	1.36	B.cur=0.55uAmp
  13091-13094	5	1	0.0	1.065/1.392	8.0	30o	-81.94+/-0.23	1.19	B.cur=0.80uAmp
  Average	2,4,5	1	-	the targets	-	54o	-90.58+/-0.12	3.01	13074-13077 13079-13082 13087-13090
  Average	5	1	-	spin dance	-	-	-90.98+/-0.13	46.9	Max. angle 53.3o+/-1o
  Best	2,4,5	1	-	-	-	30o	-81.58+/-0.23	3.01	Scaled to all targets

  The table with detailed information is given here .
  For additional information see halog entry 255865 .
  

  Spin Dance Results

  In Hall A, the spin is parallel at a Wien angle of 53.3±1.°. From this, assuming symmetric linacs, we derive the energy per linac of 583.35 MeV, which gives the Hall A energy of 5.899 GeV. This is about 7 MeV higher than the measured energy. The difference might be caused by a linacs' disbalance. The spin would be parallel at 15.5° in Hall B (5 passes) and at 23° in Hall C (4 passes). The sum of squares of the longitudinal polarizations in all 3 halls would be maximized at about 30°.

  A large chi2 of the spin dance fit (20/NDF) is likely caused by an energy instability, which affects the measurements at large spin angles (far from 54°)

  The final results:
  Pz=-81.58 +/- 0.23(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  The plot is given here .
  

  Spin Dance Results Correction

  The Spin Dance results were corrected after Mini Spin Dance in 02/11/2009 (see below). For the beam energy and current - see the Chart . Beam energy (HALLA:p) fluctuation was ~2.5MeV during the Moller measurements.
  After old on-line and off-line analysis (see plots a) and b) ) the Moller data was corrected on a difference between the beam energy readings from HALLA:p and the actual experiment energy 5892MeV (see plot c) ).
  Spin precession for the Hall A and the beam energy 5892MeV gives maximum at ~68^o (see. plot ). From the Spin Dance this angle is ~58^o. This discrepancy can be explained by the Linacs' energy disbalance ~0.8%.

  Beam polarization correction on the beam energy fluctuation was done for each Moller run (see. Table below ).

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o.
  The error is statistical only. BPM01Y position is included
  HALLA:p - Beam polarization (%) with correction on the beam energy from HALLA:p

  Runs	Target	Wien Filter	Polarization %	Chi2	HALLA:p	Chi2	Comments
  13055-13058	5	30o	-81.35+/-0.24	6.01	-80.72	5.35	B.cur=0.6uAmp
  13059-13060	5	30o	-80.74+/-0.34	2.92	-79.80	3.02	B.cur=0.8uAmp
  13061-13064	5	50o	-90.49+/-0.24	0.78	-89.82	0.20	B.cur=0.8uAmp
  13065-13068	5	70o	-88.03+/-0.21	0.21	-88.32	0.10	B.cur=0.8uAmp
  13070-13073	5	-30o	-9.33+/-0.24	14.1	-4.94	0.54	B.cur=0.8uAmp
  13074-13077	5	54o	-90.67+/-0.24	3.78	-90.23	4.40	B.cur=0.8uAmp
  13079-13082	4	54o	-89.96+/-0.22	2.02	-89.58	1.93	B.cur=0.8uAmp
  13083-13086	3	54o	-88.93+/-0.21	2.26	-88.01	2.33	B.cur=0.5uAmp
  13087-13090	2	54o	-91.00+/-0.19	1.34	-90.07	3.06	B.cur=0.5uAmp
  13091-13094	5	30o	-81.92+/-0.23	1.19	-79.89	1.66	B.cur=0.8uAmp
  Average	4,5	54o	-90.28+/-0.12	3.18	-89.88	3.25	-
  Average	5	-	-81.47+/-0.15	3.74	-80.19	4.00	30deg.
  Best	2,4,5	30o	-81.12+/-0.15	-	-79.88	-	Scaled to all targets

  Run-by-Run Summary is presented in table .

  The final corrected results:
  Pz=-79.88 +/- 0.15(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  

• 24 January 2009 12:50 - 14:30. E.Chudakov, O.Glamazdin

  The beam energy is 5904MeV(accel), 583.5MeV(linac), 65.6437MeV(injector).
  Injector angle is 30^o, the 1/2 wave plate was IN.
  Injector Laser attenuation=88, Slit=28. Fast raster was ON. Tuning took ~35m. There was no energy lock.

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760.
  The target angle is 20.5^o. The error is statistical only. BPM01Y position is included
  Cor.Pol - Polarization corrected on the beam energy fluctuation (HALLA:p)

  Runs	Target	Type	T.Pos.	Encoder	BOP	Polarization %	Chi2	Cor.Polar. %	Chi2	Comments
  13097-13100	2	1	0.0	2.921/1.387	8.0	-79.77+/-0.21	1.29	-78.66	1.60	Thr=300mV B.cur=0.46uAmp
  13101-13104	3	1	0.0	2.291/1.382	8.0	-77.88+/-0.27	2.61	-76.77	2.07	B.cur=0.46uAmp
  13105-13108	5	1	0.0	1.033/1.392	8.0	-78.62+/-0.23	2.55	-79.90	2.01	B.cur=0.80uAmp
  13109-13112	4	1	0.0	1.666/1.390	8.0	-78.49+/-0.22	0.98	-79.86	0.80	B.cur=0.80uAmp
  Average	5,4	1	-	-	-	-79.01+/-0.13	3.34	-79.88	1.21	-

  The table with detailed information is given here .
  For additional information see halog entry 257599 .

  For the beam energy fluctuation see plot1 . Only Targets 4 and 5 were used for analys. Run-to-run information see in table an on plot .

  The final results:
  Pz=-79.88 +/- 0.16(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  The plots are given here .
  

• 3 February 2009 18:00 - 19:30. E.Chudakov, O.Glamazdin

  The beam energy is 5904.9MeV(accel), 583.5MeV(linac), 65.6437MeV(injector).
  Injector angle is 30^o, the 1/2 wave plate was IN.
  Injector Laser attenuation=150, Slit=19. Fast raster was ON. Tuning took ~1h40m. There was no energy lock.

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o.
  The error is statistical only. BPM01Y position is included
  Cor.Pol - Polarization corrected on beam energy fluctuation (HALLA:p)

  Runs	Target	Type	T.Pos.	Encoder	BOP	Polarization %	Chi2	Cor.Polar. %	Chi2	Comments
  13117-13120	5	1	0.0	1.026/1.384	8.0	-75.49+/-0.23	1.31	-79.33	0.23	Thr=300mV B.cur=0.82uAmp
  13121-13124	4	1	0.0	1.665/1.387	8.0	-76.15+/-0.21	1.34	-78.92	0.27	B.cur=0.82uAmp
  13125-13128	2	1	0.0	2.920/1.377	8.0	-75.59+/-0.18	0.70	-75.02	0.75	B.cur=0.42uAmp
  Average	5,4	1	-	-	-	-75.84+/-0.16	1.78	-79.11	0.46	-

  The table with detailed information is given here .
  For additional information see halog entry 258810 .
  Low beam current measurements (0.4uA) with Target 2 were not included in summary result (see Chart ). Run-by-run information given in table an on plot

  The final corrected results:
  Pz=-78.37 +/- 0.19(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  The plot is given here .
  

  E-06-014: d2n experiment

• 7 February 2009 10:00 - 14:00. E.Chudakov, O.Glamazdin

  The beam energy is 5904.9MeV(accel), 583.5MeV(linac), 65.6437MeV(injector).
  Injector angle is 30^o, the 1/2 wave plate was IN.
  Injector Laser attenuation=94, Slit=17.6. Fast raster was ON.
  Tuning took ~2h. There was no energy lock.

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o.
  The error is statistical only. BPM01Y position is included
  Cor.Pol - Polarization corrected on beam energy fluctuation (HALLA:p)

  Runs	Target	Type	T.Pos.	Encoder	BOP	Polarization %	Chi2	Cor.Polar. %	Chi2	Comments
  13131-13138	5	1	0.0	1.026/1.382	8.0	-75.39+/-0.16	5.80	-79.35	3.14	Thr=300mV B.cur=0.8uAmp
  13139-13142	4	1	0.0	1.656/1.387	8.0	-75.45+/-0.22	0.14	-79.58	1.26	B.cur=0.8uAmp
  13143-13146	2	1	0.0	2.916/1.384	8.0	-75.41+/-0.13	1.00	-73.98	0.25	B.cur=0.4uAmp
  Average	5,4	1	-	-	-	-75.41+/-0.13	3.73	-79.43	2.41	-

  The table with detailed information is given here .
  For additional information see halog entry 259496 .

  For the beam energy fluctuation see plot1 . Moller data correction on the beam energy fluctuation can not be done for Target 2 (runs 13143-13146) - see plot2 . Only Targets 4 and 5 were used for analys. Run-by-run information see in table an on plot .

  The final corrected results:
  Pz=-79.43 +/- 0.13(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  The plot is given here .
  

• 9 February 2009 10:00 - 16:15. O.Glamazdin

  The beam energy is 1230.9MeV(accel), 583.5MeV(linac), 65.6437MeV(injector).
  Injector angle is 30^o, the 1/2 wave plate was IN.
  Injector Laser attenuation=143, Slit=15.75. Fast raster was ON.
  Tuning took about 1h30m and it was no beam from 12:30 till 14:40.
  There was no energy lock.

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o.
  The error is statistical only. BPM01Y position is included
  Cor.Pol - Polarization corrected on beam energy fluctuation (HALLA:p) and 0.8% Linacs' disbalance

  Runs	Target	Type	T.Pos.	Encoder	BOP	Polarization %	Chi2	Cor.Polar. %	Chi2	Comments
  13152-13161	5	1	0.0	1.021/1.387	8.0	-72.58+/-0.22	1.7	-72.66	1.8	Thr=300mV B.cur=0.7uAmp
  13162-13165	4	1	0.0	1.651/1.387	8.0	-71.60+/-0.25	1.6	-71.62	1.6	B.cur=0.7uAmp
  13166-13170	2	1	0.0	2.916/1.387	8.0	-70.85+/-0.21	0.3	-71.90	0.3	B.cur=0.5uAmp
  Average	5,4,2	1	-	-	-	-71.64+/-0.13	3.53	-71.69	3.64	-

  The table with detailed information is given here .
  Runs 13156,13157 - wrong HV setting.
  Target 5: runs 13152-13155 and 13160,13161. 13160 and 13161 were measured after 2 hours of no beam.
  Run 13168 - wrong apperture signal.
  For additional information see halog entry 260040 .

  For the beam energy and current - see the Chart 1 and Chart 2 . The energy seems to have fluctuated much smaller than at 5 passes.
  The energy measured (HALLA:p) fluctuated on the Chart 1 with an amplitude ~0.2MeV and has a shift +0.4MeV above the experiment energy 1230MeV. On the Chart 2 (when dipole problem in Arc was fixed) it seems the energy measured (HALLA:p) has only fluctuation around 1230MeV with no shift.

  At the Wien filter angle 30deg. and the beam energy 1230MeV we have in the HallA 78% of 100% longitudinal polarization (at the Wien angle 54deg.). If we scale Moller result with the beam polarization at 54deg. = -90.58% (see Moller results from Spin Dance 01/13/09) we have -90.58*0.78=-70.65%.
  Beam polarization correction on the beam energy fluctuation (HALLA:p) was done for each Moller run. Run-by-run information see in table .

  The final results:
  Pz=-71.69 +/- 0.13(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  The plot is given here .
  

• 11 February 2009 15:30 - 20:15. E.Chudakov, O.Glamazdin

  The beam energy is 5904MeV(accel), 583.5MeV(linac), 65.6437MeV(injector).
  Injector angle is 30^o, the 1/2 wave plate was OUT.
  Injector Laser attenuation=106, Slit=16.9. Fast raster was ON.

  SPIN DANCE

  There was no energy lock.

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o Threshold=300mV.
  The error is statistical only. BPM01Y position is included.
  Cor.Pol - Polarization corrected on beam energy fluctuation (HALLA:p)

  Runs	Target	Type	T.Pos.	Encoder	BOP	Wien Filter	Polarization %	Chi2	Cor.Polar. %	Chi2	Comments
  13174-13175	5	1	0.0	1.031/1.385	8.0	30o	81.52+/-0.23	1.2	80.58	0.5	B.cur=0.8uAmp
  13176-13179	4	1	0.0	1.653/1.385	8.0	30o	81.08+/-0.15	3.2	80.68	1.1	B.cur=0.8uAmp
  Average	4,5	1	-	-	-	30o	81.21+/-0.12	2.7	80.64	0.8	-
  13180-13181	5	1	0.0	1.031/1.385	8.0	20o	72.59+/-0.22	1.3	71.91	1.2	B.cur=0.8uAmp
  13182-13185	4	1	0.0	1.656/1.382	8.0	20o	70.46+/-0.15	13.9	72.33	1.2	B.cur=0.8uAmp
  Average	4,5	1	-	-	-	20o	71.32+/-0.12	13.7	72.19	1.5	-
  13186-13187	5	1	0.0	1.026/1.389	8.0	23o	72.73+/-0.22	5.0	74.13	12.0	B.cur=0.8uAmp
  13189-13190	4	1	0.0	1.656/1.387	8.0	23o	73.54+/-0.21	3.2	74.82	1.3	B.cur=0.8uAmp
  Average	4,5	1	-	-	-	23o	73.34+/-0.15	5.0	74.50	6.2	-

  The table with detailed information is given here .
  For additional information see halog entry 260554
  The plot is given here .
  

  Mini Spin Dance Results

  There was no energy lock. For the beam energy and current - see the Chart . Beam energy (HALLA:p) fluctuation was ~2.5MeV
  during the Moller measurements.
  Mini Spin Dance results were analysed together with 01/13/09 Spin Dance results. After the Moller raw data analys (see plot b) ) we corrected the Moller data on a difference between the beam energy readings from HALLA:p and the actual experiment energy 5892MeV (see plot c) ).
  Spin precession for the Hall A and the beam energy 5892MeV gives maximum at ~68^o (see. plot ). From the Spin Dance this angle is ~58^o. This discrepancy can be explained by the Linacs' energy disbalance ~0.8%.

  Beam polarization correction on the beam energy fluctuation and the Linacs' energy disbalance was done for each Moller run (see. Table above - "Cor.Polar. %" column). Summary is presented on plot and in table .

  The Wien filter angle 23^o was choosen as an optimal for the Hall A and the Hall C beam polarization values. After all corrections from plot we can see that the optimal Wien filter angle for the Hall A and the Hall C is 19^o.
  The Wien filter angle 23^o gives for the Hall A a bit lager polarization.

  The final results for the Wien filter angle 23^o:
  Pz=74.50 +/- 0.15(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  

• 19 February 2009 20:45 - 22:40. E.Chudakov, O.Glamazdin

  The beam energy is 5904.9MeV(accel), 583.5MeV(linac), 65.6437MeV(injector).
  Injector angle is 23^o, the 1/2 wave plate was IN.
  Injector Laser attenuation=225, Slit=15.85. Fast raster was ON.
  Tuning took 45min.

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o.
  The error is statistical only. BPM01Y position is included
  Cor.Pol - Polarization corrected on beam energy fluctuation (HALLA:p)

  Runs	Target	Type	T.Pos.	Encoder	BOP	Polarization %	Chi2	Cor.Polar. %	Chi2	Comments
  13193-13196	5	1	0.0	1.031/1.387	8.0	-74.26+/-0.24	1.66	-74.44	0.46	Thr=300mV B.cur=0.8uAmp
  13197-13200	4	1	0.0	1.653/1.389	8.0	-73.07+/-0.22	1.58	-74.55	1.38	B.cur=0.8uAmp
  Average	5,4	1	-	-	-	-73.58+/-0.16	3.29	-74.44	1.03	Without lock
  13201-13204	5	1	0.0	1.031/1.389	8.0	-74.82+/-0.21	4.12	-74.82	3.60	B.cur=1.0uAmp
  13206-13209	4	1	0.0	1.651/1.389	8.0	-75.24+/-0.20	0.17	-74.18	0.88	B.cur=1.0uAmp
  Average	5,4	1	-	-	-	-74.51+/-0.15	2.40	-74.48	2.61	With lock
  Average	5,4	1	-	-	-	-74.11+/-0.11	3.76	-74.48	1.59	For all runs

  The table with detailed information is given here .
  For additional information see halog entry 262181 .

  For the beam energy fluctuation see plot . There was no energy lock for the first half of the measurement (runs 13192-13200), and a lock in ARC2 using a tool called "PID" (told us by the MCC) for the rest of runs. Beam energy correction was done for all runs. Run-by-run information see in table an on plot .

  The final corrected results:
  Pz=-74.48 +/- 0.11(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  The plot is given here .
  

• 03 March 2009 18:05 - 21:15. E.Chudakov, O.Glamazdin

  The beam energy is 5904.9MeV(accel), 583.5MeV(linac), 65.6437MeV(injector).
  Injector angle is 30.0^o, the 1/2 wave plate was IN.
  Injector Laser attenuation=191, Slit=15.5. Fast raster was ON.
  Tuning took 1h. Initially the Moller dipole setting was wrong.

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o.
  The error is statistical only. BPM01Y position is included
  Cor.Pol - Polarization corrected on beam energy fluctuation (HALLA:p)

  Runs	Target	Type	T.Pos.	Encoder	BOP	Polarization %	Chi2	Cor.Polar. %	Chi2	Comments
  13226-13229	5	1	0.0	1.021/1.381	8.0	-80.40+/-0.19	3.03	-79.93	1.42	Thr=300mV B.cur=1.1uAmp
  13230-13231	5	1	0.0	1.021/1.381	8.0	-79.37+/-0.28	0.05	-79.90	0.03	Trigger:RLG+LLG
  13232-13235	4	1	0.0	1.643/1.392	8.0	-80.25+/-0.18	0.58	-79.42	1.52	-
  Average	5,4	1	-	-	-	-80.14+/-0.12	2.31	-79.70	1.46	For all runs

  The table with detailed information is given here .
  Runs 13230-13231: trigger Left LG + Right LG, no apperture counter in trigger.
  For additional information see halog entry 264402 .

  For the beam energy fluctuation see plot . There was an energy lock in ARC2 using a tool called "PID". This day it was not running properly (see elog 1460400). The next day it was fixed (see elog 1460485). Beam energy correction was done for all runs. Run-by-run information see in table an on plot .

  The final corrected results:
  Pz=-79.70 +/- 0.12(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  The plot is given here .
  

• 06 March 2009 17:05 - 20:15. E.Chudakov, O.Glamazdin

  The beam energy is 4739.83MeV(accel), 583.5MeV(linac), 65.6437MeV(injector).
  Injector angle is -18.0^o, the 1/2 wave plate was OUT.
  Injector Laser attenuation=220, Slit=16. Fast raster was ON.
  Tuning took ~1h. Again, initially the Moller dipole setting was wrong.

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o.
  The error is statistical only. BPM01Y position is included
  Cor.Pol - Polarization corrected on beam energy fluctuation (HALLA:p)

  Runs	Target	Type	T.Pos.	Encoder	BOP	Polarization %	Chi2	Cor.Polar. %	Chi2	Comments
  13252-13255	5	1	0.0	1.021/1.389	8.0	66.01+/-0.20	5.34	64.55	0.69	Thr=300mV B.cur=1uAmp
  13256-13259	5	1	0.0	1.021/1.389	8.0	65.57+/-0.20	0.12	64.36	0.12	Trigger:RLG+LLG
  13260-13263	4	1	0.0	1.651/1.389	8.0	64.40+/-0.19	2.87	63.00	2.92	-
  13264-13265	5	1	0.0	1.021/1.389	8.0	65.39+/-0.28	0.88	63.98	1.36	-
  Average	5,4	1	-	-	-	65.30+/-0.10	4.92	63.94	3.97	For all runs

  The table with detailed information is given here .
  Runs 13256-13259: trigger Left LG + Right LG, no apperture counter in trigger.
  For additional information see halog entry 264979 .

  For the beam energy fluctuation see plot . There was an energy lock in ARC2 using a tool called "PID". Beam energy correction was done for all runs. Run-by-run information see in table an on plot .

  The final corrected results:
  Pz=63.94 +/- 0.10(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  The plot is given here .
  

• 12 March 2009 18:00 - 19:40. A.Saha, O.Glamazdin

  The beam energy is 4744.24MeV(accel), 468.1MeV(linac), 52.6613MeV(injector).
  Injector angle is 21.2^o, the 1/2 wave plate was OUT.
  Injector Laser attenuation=125, Slit=17.88. Fast raster was ON.
  Tuning took ~35min.

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o.
  The error is statistical only. BPM01Y position is included
  Cor.Pol - Polarization corrected on beam energy fluctuation (HALLA:p)

  Runs	Target	Type	T.Pos.	Encoder	BOP	Polarization %	Chi2	Cor.Polar. %	Chi2	Comments
  13268-13271	5	1	0.0	1.011/1.397	8.0	-61.49+/-0.20	0.64	-61.49	0.64	Thr=300mV B.cur=1uAmp
  13272-13275	4	1	0.0	1.658/1.392	8.0	-60.25+/-0.18	0.32	-60.25	0.32	-
  Average	5,4	1	-	-	-	-60.79+/-0.13	3.4	-60.79	3.4	For all runs

  The table with detailed information is given here .
  
  For additional information see halog entry 265694 .

  For the beam energy fluctuation see the plot . There was an energy lock in ARC2 using "PID". The Energy lock was usefull this time. The beam energy was stable (fluctuation was less than +/-0.1MeV). The beam energy correction for the Moller results is not needed.

  The final corrected results:
  Pz=-60.79 +/- 0.13(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  The plot is given here .
  

  E-05-015 and E-08-005: Quasi-Elastic Family Experiments

• 24 April 2009 22:00 - 24:00. E.Chudakov, A.Saha

  The beam energy is 1246.19MeV(accel), 590.2MeV(linac), 66.3975MeV(injector).
  Injector angle is -14.3961^o, the 1/2 wave plate was OUT.
  Injector Laser attenuation=100, Slit=15.75. Fast raster was ON.
  Tuning took ~30min.

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o.
  The error is statistical only. BPM01Y position is included
  Cor.Pol - Polarization corrected on beam energy fluctuation (HALLA:p)

  Runs	Target	Type	T.Pos.	Encoder	BOP	Polarization %	Chi2	Cor.Polar. %	Chi2	Comments
  13293-13296	5	1	0.0	1.031/1.387	8.0	88.1+/-0.3	0.64	88.1	0.64	Thr=270mV B.cur=0.5uAmp
  13297-13300	4	1	0.0	1.656/1.390	8.0	88.6+/-0.3	0.32	88.6	0.32	-
  Average	5,4	1	-	-	-	88.3+/-0.2	0.8	88.3	0.8	For all runs

  The table with detailed information is given here .
  
  For additional information see halog entry 268056 .

  There was no energy lock. The beam energy correction for the Moller results is not needed.

  The final corrected results:
  Pz=88.3 +/- 0.2(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  The plot is given here .
  

• 30 April 2009 13:30 - 16:30. A.Saha, R.Michaels

  The beam energy is 3611.89MeV(accel), 590.2MeV(linac), 66.3975MeV(injector).
  Injector angle is 74.8283^o, the 1/2 wave plate was IN.
  Injector Laser attenuation=139, Slit=27.0. Fast raster was ON.
  Tuning took ~60min.

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o.
  The error is statistical only. BPM01Y position is included
  Cor.Pol - Polarization corrected on beam energy fluctuation (HALLA:p)

  Runs	Target	Type	T.Pos.	Encoder	BOP	Polarization %	Chi2	Cor.Polar. %	Comments
  13309-13312	5	1	0.0	1.026/1.387	8.0	84.21+/-0.18	2.15	84.21	Thr=270mV B.cur=0.8uAmp
  13313-13316	4	1	0.0	1.648/1.392	8.0	83.94+/-0.19	3.00	83.94	-
  Average	5,4	1	-	-	-	84.06+/-0.13	2.35	84.06	For all runs

  The table with detailed information is given here .
  
  For additional information see halog entry 269968 .

  For the beam energy fluctuation see the plot . There was an energy lock in Hall C BSY dump line. The Energy lock was usefull. The beam energy was stable (fluctuation was about +0.2MeV). The beam energy correction for the Moller results is not needed.

  The final corrected results:
  Pz=84.06 +/- 0.13(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  The plot is given here .
  

• 14 May 2009 15:30 - 17:30. A.Saha

  The beam energy is 2428.74MeV(accel), 590.2MeV(linac), 66.3975MeV(injector).
  Injector angle is 66.9203^o, the 1/2 wave plate was OUT.
  Injector Laser attenuation=220, Slit=17.6. Fast raster was ON.
  Tuning took ~90min. Moller Dipole was not turned on for 1 hr

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o.
  The error is statistical only. BPM01Y position is included
  Cor.Pol - Polarization corrected on beam energy fluctuation (HALLA:p)

  Runs	Target	Type	T.Pos.	Encoder	BOP	Polarization %	Chi2	Cor.Polar. %	Comments
  13323-13326	5	1	0.0	1.033/1.394	8.0	84.01+/-0.20	0.80	84.01	Thr=270mV B.cur=0.8uAmp
  13327-13330	4	1	0.0	1.658/1.387	8.0	82.87+/-0.18	0.51	82.87	-
  Average	5,4	1	-	-	-	83.38+/-0.14	3.10	83.38	For all runs

  The table with detailed information is given here .
  
  For additional information see halog entry 273366 .

  For the beam energy fluctuation see the plot . There was Energy lock on Arc2. The beam energy was stable (fluctuation was less than 0.1MeV). The beam energy correction for the Moller results is not needed.

  The final corrected results:
  Pz=83.38 +/- 0.14(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  The plot is given here .
  

• 20 May 2009 10:30 - 13:00. A.Saha

  The beam energy is 2428.74MeV(accel), 590.2MeV(linac), 66.3975MeV(injector).
  Injector angle is 66.9203^o, the 1/2 wave plate was OUT.
  Injector Laser attenuation=385, Slit=16.2. Fast raster was ON.
  Tuning took ~60min.

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o.
  The error is statistical only. BPM01Y position is included
  Cor.Pol - Polarization corrected on beam energy fluctuation (HALLA:p)

  Runs	Target	Type	T.Pos.	Encoder	BOP	Polarization %	Chi2	Cor.Polar. %	Comments
  13337-13342	5	1	0.0	1.033/1.390	8.0	78.49+/-0.22	8.2	78.49	Thr=270mV B.cur=0.7uAmp
  13343-13347	4	1	0.0	1.646/1.390	8.0	78.29+/-0.17	0.8	78.29	-
  Average	5,4	1	-	-	-	78.37+/-0.14	4.5	78.37	For all runs

  The table with detailed information is given here .
  
  For additional information see halog entry 275055 .

  For the beam energy fluctuation see the plot . There was Energy lock on Hall A PID. The beam energy was stable (fluctuation was less than 0.1MeV). The beam energy correction for the Moller results is not needed.

  The final corrected results:
  Pz=78.37 +/- 0.14(stat) +/- 2.0(syst-prelim) (dead time correction is not included)
  The plot is given here .
  

• 27 May 2009 13:00 - 17:00. A.Saha, R.Michaels, A.Cansomme

  The beam energy is 2428.74MeV(accel), 590.2MeV(linac), 66.3975MeV(injector).
  Injector angle is 66.9203^o, the 1/2 wave plate was IN and OUT.
  Injector Laser attenuation=180, Slit=16.2. Fast raster was ON.
  Tuning took ~60min.

  The theta acceptance is about +/-14^o and the mean analysing power is 0.760. The target angle is 20.5^o.
  The error is statistical only. BPM01Y position is included
  Cor.Pol - Polarization corrected on beam energy fluctuation (HALLA:p)

  Runs	Target	Type	T.Pos.	Encoder	BOP	Polarization %	Chi2	Cor.Polar. %	Comments
  -	-	-	-	-	-	-	-	-	Half Wave Plane = IN
  13349-13353	5	1	0.0	1.030/1.399	8.0	-88.67+/-0.21	0.24	-88.67	Thr=270mV B.cur=0.7uAmp
  13354-13357	4	1	0.0	1.651/1.397	8.0	-87.69+/-0.21	0.21	-87.69	-
  Average	5,4	1	-	-	-	-88.19+/-0.15	1.58	-88.19	For all runs with HWP=IN
  -	-	-	-	-	-	-	-	-	Half Wave Plane = OUT
  13358-13361	4	1	0.0	1.648/1.399	8.0	86.96+/-0.20	0.78	86.96	Thr=270mV B.cur=0.7uAmp
  13362-13365	5	1	0.0	1.026/1.397	8.0	87.62+/-0.22	1.01	87.62	-
  Average	5,4	1	-	-	-	87.26+/-0.15	1.50	87.26	For all runs with HWP=OUT

  The table with detailed information is given here .
  
  For additional information see halog entry 276872 .

  For the beam energy fluctuation see the plot . There was Energy lock on ARC2. The beam energy correction for the Moller results is not needed.

  The final corrected results for Half Wave Plane = IN:
  Pz=-88.19 +/- 0.15(stat) +/- 2.0 (dead time correction is not included)
  The plot is given here .
  The final corrected results for Half Wave Plane = OUT:
  Pz=+87.26 +/- 0.15(stat) +/- 2.0 (dead time correction is not included)
  The plot is given here .
  

  Moeller Polarimeter Results For Currently Running Experiment

  E-05-109: HAPPEX-III. A Measurement of Nucleon Strange Form Factors at High Q2