Schedule

Moller Commissioning Run Plan
- To do during pre-beam access:
- 1)hook up H+, H-
- 2)hook up V/F current monitor
- 3)check shielding
- 4)remove Howard's detector
- 5)install hodoscope
- 6)pulser tests
- 7)cosmics
- 1) Beam in Hall, I=1-3 microAmps, target out
- 2)Set Moller magnets (target out):
- Q1=48.776
- Q2=85.855
- Q3=3.4408
- D=-176.44
- 3)BCM calibration/check:
- PLU logic set so H+,H- always on.
- Vary current up to 10 microAmps (if allowed). Take 3 measurements.
- Compute our current for each setting from our scaler values.
- Compare to standard BCM setup.
- 4) Install Moller target.
- 5) Check current calibration again, 1-2 points.
- 6)Put in helicity bits (in PLU). Do ADC run with low threshold.
- 7)Scaler runs--look at rates:
- coinc left (aperture left + summed lead glass left)
- coinc right
- total coinc (Moller coincidence)
- accidentals (delayed coincidence)
- (raw rates on aperature)
- 8)Vary dipole field +-10%, scaler runs, each time do #7:
- Plot coincidence/accid rate as a function of dipole current.
- Look for peak.
- 9)Fixed dipole field at coincidence peak value:
- Look at coinc vs. Q1 and Q2 fields.
- Make 2-D plot.
- Do similar studies with Q3.
- 10)ADC runs, set all magnetic fields at coincidence peak values:
- Vmax=2000V for aperature and lead glass.
- gain match ADC's gated on Moller coincidence.
- 11)Lead glass threshold studies (very quick measurements):
- As a function of lead glass threshold check:
- Ncoinc
- Naccid
- Nleft
- Nright
- Make a plot of the ratio Ncoinc/Naccid vs. threshold.
- 12)Aperture threshold studies (do quickly if running out of time):
- As a function of aperture threshold check:
- Ncoinc
- Naccid
- Nleft
- Nright
- Make a plot of the ratio Ncoinc/Naccid vs. threshold.
- If time, do this with different HV's (Vmax=2000.)
- 13)Measure instrumental asymmetry with Bhelmholtz=0, target perpendicular
to beam (since beam is polarized).
- Do this for several currents.
- Check that accidentals look reasonable (~I^2).
- 14) Measure Pe, h=60 Hz:
- I=2,4,6,8,10 (if allowed).
- Cross check with Mott.
- 15)Hodoscope studies.
- 16)Vary injection angle and cross check with Hall C.

Moller Runs
July 1, 1997, Tuesday
00:00-08:00 D. Dale*
A. Gasparian
08:00-16:00 V. Gorbenko
A. Gasparian*
M. Finn (FPP)
K. Woojesurya (FPP)
16:00-24:00 D. Dale*
T. Gorringe
C. Glashausser (FPP)
R. Pomatsalyuk
July 2, 1997, Wednesday
00:00-08:00 A. Glamazdin*
M. Jones (FPP)
V. Zeps
S. Malov (FPP)
8:00-12:00 V. Gorbenko
A. Gasparian*
G. Quemmenar (FPP)
12:00-16:00 Bogdan detector tests, Moller off.
16:00-24:00 D. Dale*
R. Pomatsalyuk
J. McIntyre(FPP)
July 3, 1997, Thursday
00:00-08:00 A. Glamazdin*
T. Gorringe
M. Jones (FPP)
S. Malov (FPP)
08:00-1600 V. Zeps
A. Gasparian*
V. Gorbenko
* Shift leaders

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