Arc BdL measurement  13:47:57 on November 3,2000

Arc BdL measurement
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We made two BdL measurenments

Run 712: I = 9197.81 T.mm
Run 713: I = 9197.76 T.mm

If we use the Arc reference angle = 34.2918 deg, Energy = 4607.2 MeV

MCC set for the 8 Dipole string = 1151760.5 G.cm


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Hall A Arc Energy Measurement  13:59:17  November 6,2000


Hall A Arc Energy Measurement
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Energy = 4606.7 +/- 1.5 MeV

Angle = 34.2952 deg (avg. of scans 1163,1164,1165)
Bdl = 9197.71 T.mm (avg. of Runs 716,717)

Scans were performed in Dispersive mode, 8.7 uA beam
Scan profiles in scanners 3,4 were bad (see plot below of run 1163). Hence the larger error on this
measurement.

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Moller results 14:18:08 on November 5,2000

Beam conditions: 4.600 GeV (MCC), linac = 0.567 MeV, Wien angle -24.5o.
The beam polarization:
-60.45+/-0.15(stat)+/-2.4(syst)% 

The results indicate a high transverse polarization, corresponding
to a spin angle of about 30 degrees

Compton   18:26:34 on November 5,2000

First Compton measurement for Gep :
Short Run (10 minutes, 40muA, 1/4 kW)

Pe_e=62 % +/- 1.8 % (stat) +/- 3?%(syst)


Moller results  10:12:26 on November 6,2000

The dead time correction changes the last result by 1% relative, to:
-61.1 +/- 0.15 +/- 2.4% 

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Compton P_e measurement  15:55:44 on November 6,2000

Beam Polarization after Wien angle changed to -33

Compton P_e (%)= 69 +/- 1.9 (stat) +/- 3 (syst)


Compton   09:49:24 on November 8,2000

Polarization from Compton : 
I_e=68muA, P_Light=1.35 kW
P_e=72.6 +/- 0.9 +/- 3%
(electron beam was very unstable, many RF trips and
a lots of noise in position)


Changed spot position.


Compton 00:08:59 on November10,2000

P_e = 71.7 +/- 1 +/- 3 %
Compton polarimeter

Polarization summary for Saturday Nov. 11th:

Time Polar. stat. error (absolute)
08:49 70.4 0.6
09:37 70.3 0.6
10:57 70.6 0.5
13:35 70.1 0.6
14:54 71.5 0.7
16:10 70.5 0.6
17:33 70.1 0.6
Compton Polarimeter

Polarization summary for Sunday Nov. 12th:

Time Polar. stat. Error (absolute)
12:27 71.5 1.2
16:48 72.5 0.6
17:53 69.6 0.8

Compton Polarization summary for Monday Nov. 13th:

Time Polar Stat. error
08:39 73.7 0.8 (beam position unstable)
13:08 70.7 0.7
14:57 71.5 0.7
15:46 70.8 0.7