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Daily Run Plan

Here are details of the daily run plan. See also the Global Run Plan. The person responsible should ensure that a crew of experts is available for the shift. This schedule will be updated frequently by the Run Coordinator as the situation on the ground changes.

Daily Run Plan for PREX   (latest at bottom)
Date (2010) Shift ---------- Activity (Responsible) ---------- --- Status ---
03/19 Day pump down; Møller, Compton, septum install; Q2 repair

Insert sieve. (Techs)

03/19 Swing Beam restore (B-team) done
03/20 Owl
  • Septum checkout (Michaels: Page when beam imminent & spectrometer ready)


  • Initial look at low current cavity monitors (Zafar: Page when beam imminent & spectrometer ready)
  • Target alignment (Michaels)
  • VDC checkout (Michaels)
  • Quartz detectors checkout (McNulty, Wexler -- page when VDC tracks seen)
  • GEM checkout (Camsonne -- page when VDC tracks seen, if left dipole is operating)

All at 1-2 µA.
Scattered energy ~ beam energy = 1.063 GeV.
Quad settings:

  • Right arm:
    • Q1: dI/dP= 411.2474 Amps/GeV/c
    • Q2: dI/dP= 436.2014 Amps/GeV/c
    • Q3: dI/dP= 433.3897 Amps/GeV/c
  • Left Arm:
    • Q1: dI/dP= 419.8772 Amps/GeV/c
    • Q2: dI/dP= 435.6273 Amps/GeV/c
    • Q3: dI/dP= 434.9682 Amps/GeV/c

"Usual" polarity

03/20 Day Beam off & hall open 9:00 am

Quads repair; Compton install; GEM install; signals debugging. Leave sieves in. (Techs)

03/20 Swing
  • Close up hall
  • Benesch tuning (1/2 - 2 hours)
  • Verify quad polarities (Camsonne)
  • Cavity monitors basic function test (Zafar)
  • Low current cavity monitors setup (Musson, Zafar)
3/21 Owl
  • Low current cavity monitors setup (Musson, Zafar)
  • Access for GEM installation (Camsonne)
done but GEMs not ready
3/21 Day
  • Spectrometer checkout:
    • Quartz detectors checkout (McNulty, Wexler)
    • Lumi checkout (Mercado) (2 µA on Ta)
    • GEM checkout (Camsonne?)
  • A line tuning (Benesch)
  • Raster checkout
  • Access:
    • Low current cavities
    • Target position
    • Quartz
    • Scintillator alignment
    • LQ2
3/21 Swing
  • Low current cavity monitors setup (Michaels, Zafar)
  • Remove sieves
  • Initial look at sieve out data
  • Replace sieves
3/22 Owl
  • Pointing measurement (Riordan)
  • Remove sieves
  • Repeat pointing measurements with no sieves
  • If done or unable to continue before 4 am page Luis Mercado to do lumi checks
  • After 4 am page Dustin McNulty for detector work
3/22 Day
  • Optics (Liyanage)Sieve OUT. NB Current limit 2 uA!
3/22 Swing
  • Optics continued, sieve IN. NB Current limit 2 uA! (Shift Crew)
3/23 Owl
  • Quartz detectors resolution studies (KK, Dustin, John W)
  • Lumi studies (Luis)
3/23 Day
  • Remove water target. (Target, Techs)
  • Reconfigure Moller cryo.
  • Beam studies ~ 2pm, study of helicity correlated position differences for spin flipper states. (Dalton, Rupesh, Reza)
water cell removed, rest not finished
3/23 Swing
  • Target pumpdown
3/24 Owl
  • Target pumpdown
3/24 Day
  • Target cooldown
3/24 Swing
  • Tune high current beam into Hall A
3/25 Owl
  • Commission lead target, 50 uA (Bob)
  • Lumis and oversampling tests (KK, Luis, Paul)
in progress
3/25 Day
  • Access to fix left dipole
3/25 Swing
  • Parity Quality commissioning (Kent, Rupesh, Luis, Dustin)
  • Beam monitor calibrations (Diancheng Wang, Xiaoyan Deng)
3/26 Owl
  • High Luminosity Detector Commissioning
in progress
3/26 Day
  • Moller Checkout
3/26 Swing
  • High Current on C12 (thick and thin)
partly done
3/27 Owl no beam
3/27 Day no beam
3/27 Swing
  • High-current on thick C12, adjust HV (Luis or Bob)
  • Finish the commissioning of thick Pb target (Bob, Ahmed)
  • Electronic Commissioning (KK, Luis, Paul, Jon et al)
done, high-current tests continue
3/28 Owl
  • Continue with the above, if necessary.
  • High Luminosity Commissioning (Rupesh, Luis, Jon, Bob)
  • BCM/BPM calibration (Rupesh)
  • Establishing Parity Measurements, Charge feedback, blinding (Rupesh, Jon)
not finished
3/28 Day
  • Comparison Study of Optics Tunes (Seamus, Nilanga, Kiad)
  • Sometime before Monday, submit the ATLIS plan for Dithering test (Rupesh)
3/28 Swing
  • Continue Optics if necessary.
  • Continue High Luminosity Commissioning
3/29 Owl
  • Mini-production run (shift crew)
  • Stop beam at 07:00 or whenever Ed Folts asks to.
3/29 Day
  • Open Hall A to set up Moller and Compton (Ed Folts, Sasha, Sirish,
  • Work on GEMs (Alex, Seamus,
  • MCC to do beam studies while Hall A open
  • Detector linearity/LED tests (Luis)
  • Setup WAC analysis (Mark, Mindy)
3/29 Swing
  • Moller magnet cooldown
  • Optics and acceptance studies (Seamus, Ahmed, Nilanga)
3/30 Owl
  • Commission charge feedback (Mark)
  • Current monitor calibration and pedestals determination (Mark)
  • Quasi-production on Empty Target (owl shift crew)
3/30 Day
  • Access do work on Moller and Compton.
  • Some GEM installation work. (Alex, Seamus, Kiad, Nilanga)
  • Possible linearity/LED study. (Luis)
done, except linearity
3/30 Swing
  • First Commissioning of Moller -- Beam Checks (Sasha, Javier, Roman, Jay)
3/31 Owl
  • Scans of Septum and quad Q1 for tunes A and B. (Bob)
  • Beam Studies of Helicity Correlations
3/31 Day
  • Beam Tuning (Jay Benesch)
3/31 Swing
  • Either or both of these:
  • a) Moller Commissioning (Sasha, Javier, Roman, Jay)
  • b) Tests of Dithering and other Beam-Related things (Kent, Rupesh)
Moller was done
4/1 Owl
  • If Kent's tests not done on Swing, continue here. (Kent, Rupesh)
  • Beam and Septum scan with new tune (Seamus)
  • Helicity-correlated beam studies (Shift crew)
4/1 Day
  • Beam Tuning (Jay)
done, successful
4/1 Swing
  • More beam tuning if necessary
  • Moller Commissioning
Friday 2 April Owl
  • Assuming the HRS tune has been frozen
  • Check detector alignment
  • A_T studies
  • Q2 Measurements
partly done, needs more work
Friday 2 April Day
  • Tuning Beam for Compton
Friday 2 April Swing
  • 20:00 Obtain sieve runs (optics mini-run plan), Q2 measurements (Bob)
done, but not Q2
Saturday 3 April Owl
  • Obtain sieve runs on Ta (Nilanga mini-run plan)
  • Put in Lead target at low current and do counting-mode runs (Rupesh, Ahmed)
  • Integrate-mode with Lead at 2 or 3 uA (Luis, Jon)
Saturday 3 April Day
  • Moller Commissioning (priority activity)
  • Work on getting into production mode (Mark, Rupesh)
done, but not yet in prod.
Saturday 3 April Swing
  • Moller commissioning
Sunday 4 April Owl
  • Counting data on tune Y (right arm) super-thin carbon
  • Change to tune B
  • Integrate-mode with Lead at 2 or 3 uA (Luis, Jon)
Sunday 4 April Day
  • Integrate-mode with thick carbon 50 uA
  • Compton QWP1 calibration.
Sunday 4 April Swing
  • General Compton commissioning and pseudo-production (empty target) parity data at 50 uA.
Monday 5 April Owl
  • pseudo-production (empty target) parity data and Compton data at 50 uA.
Monday 5 April Day
  • 12:00 Jay to run optics test (~ 30 mins)
  • Moller Spin Dance
  • Set up vertical polarization and measure A_T
Monday 5 April Swing
  • Continue to setup up vertical polarization
  • Measurements of A_T on Pb and C12
Tuesday 6 April Owl
  • Continue measurements of A_T on Pb and C12
partly done
Tuesday 6 April Day
  • Possible horizontal scan: Tune B with sieve slit (Seamus)
  • When ready: Relocate Quartz Detectors (Dustin, Jack)
postponed: vacuum problems
Tuesday 6 April Swing
  • In restricted access.
  • Any activities that require access.
  • Shift on standby, unlikely to happen
Wednesday 7 April Owl
  • Shift on standby, unlikely to happen
Wednesday 7 April Day
  • Shift standby
  • Investigate target vacuum problem -- possible leak
  • Move quartz detectors (Dustin, Jack)
Wednesday 7 April Swing
  • When ready: center quartz detector in its new location
  • When ready: horizontal septum scan with B tune
Thursday 8 April Owl
  • Possible lead inelastics measurements (Bob)
  • Get into production
Thursday 8 April Day
  • Get into production
Thursday 8 April Swing
  • Production
Friday 9 April Owl
  • Production
Friday 9 April Day
  • When ready: Install GEMs
Friday 9 April Swing
  • Production
Saturday 10 April Owl
  • Production
Saturday 10 April Day
  • Production
Saturday 10 April Swing
  • Production
Sunday 11 April Owl
  • Production
Sunday 11 April Day
  • Production
Sunday 11 April Swing
  • Production
Monday 12 April Owl
  • Production
Monday 12 April Day
  • Moller ? (TBD)
Monday 12 April Swing
  • Production