Difference between revisions of "PREX2RunPlan2019"

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== Low current checkout ==
 
== Low current checkout ==
 
# <font color="blue">Basic beam setup</font>:
 
# <font color="blue">Basic beam setup</font>:
## MCC  <span style="background-color:#F1C40F">1 shift</span> Yves Roblin, Ciprian Gal
+
## MCC  <span style="background-color:#F1C40F">1 shift</span> Yves Roblin, Ciprian G
 
### beam transport through Compton chicane @5uA (rates in finger scintillators)
 
### beam transport through Compton chicane @5uA (rates in finger scintillators)
 
### spot size at target (harps)
 
### spot size at target (harps)
 
### turn on septum and verify still on dump (viewer available?!); clean transport to dump for PREX set points
 
### turn on septum and verify still on dump (viewer available?!); clean transport to dump for PREX set points
 
### 1 arm running (Q1 on) test to see beam motion (Yves and Ciprian)
 
### 1 arm running (Q1 on) test to see beam motion (Yves and Ciprian)
## Hall  <span style="background-color:#F1C40F">0.5 shift</span>: Ciprian Gal
+
## Hall  <span style="background-color:#F1C40F">0.5 shift</span>: Ciprian G
 
### harp scans for BPM calibrations and raster check
 
### harp scans for BPM calibrations and raster check
 
### Bullseye scan
 
### Bullseye scan
 
### low current beam monitoring (cavities) --> maybe this will be xchecked with HRS rates
 
### low current beam monitoring (cavities) --> maybe this will be xchecked with HRS rates
# <font color="blue">Warm target position </font> <span style="background-color:#F1C40F">0.5 shift</span> Sanghwa Park:
+
# <font color="blue">Warm target position </font> <span style="background-color:#F1C40F">0.5 shift</span> Sanghwa P:
 
## use spot++ to find carbon hole
 
## use spot++ to find carbon hole
 
## Put in Ta or this-C target. Scan few mm up-down, left-right, verify from rates we're not hitting a frame.
 
## Put in Ta or this-C target. Scan few mm up-down, left-right, verify from rates we're not hitting a frame.
 
### first check of SAMs at low current
 
### first check of SAMs at low current
# <font color="blue">Cold target position</font> <span style="background-color:#F1C40F">0.5 shift</span> Chandan Gosh:
+
# <font color="blue">Cold target position</font> <span style="background-color:#F1C40F">0.5 shift</span> Chandan G, Sanghwa P:
 
## use spot++ to find carbon hole
 
## use spot++ to find carbon hole
# <font color="blue">Collimator checkout  </font> <span style="background-color:#F1C40F">0.5 shift</span> Ye Tian, Ciprian Gal:
+
# <font color="blue">Collimator checkout  </font> <span style="background-color:#F1C40F">0.5 shift</span> Ye T, Ciprian G:
 
## check rates with SAMs
 
## check rates with SAMs
 
## moderate CW and thick C/Ta target so we can check temps (need a simulation for collimator power for C/Ta target)
 
## moderate CW and thick C/Ta target so we can check temps (need a simulation for collimator power for C/Ta target)
Line 65: Line 65:
 
## rates
 
## rates
 
## stub check?!
 
## stub check?!
# <font color="blue">Q2 measurement</font> <font color="maroon">0.5 shift</font>:
+
# <font color="blue">Q2 measurement</font> <font color="maroon">0.5 shift</font> Sanghwa P, Caryn P:
 
## Production target
 
## Production target
  
  
 
== High current checkout ==
 
== High current checkout ==
# <font color="blue">Basic setup</font> <span style="background-color:#F1C40F">0.5 shift</span>:  
+
# <font color="blue">Basic setup</font> <span style="background-color:#F1C40F">0.5 shift</span> Yves R, Ciprian G:  
 
## No target: high current setup through Compton (backgrounds on fingers and Compton MD) -- try to go to 70uA (or max, no less than 40uA)
 
## No target: high current setup through Compton (backgrounds on fingers and Compton MD) -- try to go to 70uA (or max, no less than 40uA)
# <font color="blue">High current with target</font> <span style="background-color:#F1C40F">0.5 shift</span>:  
+
# <font color="blue">High current with target</font> <span style="background-color:#F1C40F">0.5 shift</span> Ciprian G, Dustin M:  
## Pb target, raster on: Ion chamber calibration (near target): Ciprian <font color="red">'''more details needed'''</font>
+
## Pb target, raster on: Ion chamber calibration (near target): Ciprian G<font color="red">'''more details needed'''</font>
## Detector and SAM voltages
+
## Detector and SAM voltages Dustin M
# <font color="blue">Beamline instrumentation calibration</font> <span style="background-color:#F1C40F">0.5 shift</span>
+
# <font color="blue">Beamline instrumentation calibration</font> <span style="background-color:#F1C40F">0.5 shift</span> Caryn P,
 
## Current ramp for BPM/BCM calibrations and detector pedestals
 
## Current ramp for BPM/BCM calibrations and detector pedestals
# <font color="blue"> Initial production condition test</font>  <span style="background-color:#F1C40F">0.25 shift</span>
+
# <font color="blue"> Initial production condition test</font>  <span style="background-color:#F1C40F">0.25 shift</span> Caryn P,
 
## detector and SAM widths
 
## detector and SAM widths
 
## regression sensitivities
 
## regression sensitivities
Line 83: Line 83:
 
## collimator water and thermocouple temperatures,  
 
## collimator water and thermocouple temperatures,  
 
## radiation monitors and ion chamber stability
 
## radiation monitors and ion chamber stability
# <font color="blue"> Width studies  </font>  <span style="background-color:#F1C40F">0.5 shift</span> (KK)
+
# <font color="blue"> Width studies  </font>  <span style="background-color:#F1C40F">0.5 shift</span> KK,
 
## detector and SAM widths, targets, shutters, etc
 
## detector and SAM widths, targets, shutters, etc
 
## deinstall shutters at conclusion of test
 
## deinstall shutters at conclusion of test
Line 92: Line 92:
 
## Moller polarimeter commissioning (establish beam)  (<font color="red">plan needed</font>)
 
## Moller polarimeter commissioning (establish beam)  (<font color="red">plan needed</font>)
 
## Short spin dance (run plan needed, established optimal spin angle for this Wien state)  (<font color="red">plan needed</font>)
 
## Short spin dance (run plan needed, established optimal spin angle for this Wien state)  (<font color="red">plan needed</font>)
# <font color="blue">Hall PQB</font> <span style="background-color:#F1C40F">1 shift</span>:  
+
# <font color="blue">Hall PQB</font> <span style="background-color:#F1C40F">1 shift</span> Caryn P,:  
 
## Check asymmetries in the hall   
 
## Check asymmetries in the hall   
 
## Adiabatic dampening / Matching  (<font color="red">plan needed</font>)   
 
## Adiabatic dampening / Matching  (<font color="red">plan needed</font>)   
 
### Use helicity magnets to tune phase trombone
 
### Use helicity magnets to tune phase trombone
 
## Establish feedback
 
## Establish feedback
# <font color="blue">Beam modulation</font> <span style="background-color:#F1C40F">0.5 shift</span>:  
+
# <font color="blue">Beam modulation</font> <span style="background-color:#F1C40F">0.5 shift</span> Ye T,:  
 
## turn on and set amplitudes  (<font color="red">plan needed</font>)
 
## turn on and set amplitudes  (<font color="red">plan needed</font>)
 
## test orthogonality
 
## test orthogonality
# <font color="blue">Detector checkout</font> <span style="background-color:#F1C40F">1 shift</span>:  
+
# <font color="blue">Detector checkout</font> <span style="background-color:#F1C40F">1 shift</span> Dustin M:  
 
## quartz detector stub test  (<font color="red">plan needed</font>)
 
## quartz detector stub test  (<font color="red">plan needed</font>)
 
## width study  (<font color="red">plan needed</font>)
 
## width study  (<font color="red">plan needed</font>)
 
## raster sync  (<font color="red">plan needed</font>)
 
## raster sync  (<font color="red">plan needed</font>)
# <font color="blue">Production</font>: <span style="background-color:#F1C40F">0.5-3 shift?</span>
+
# <font color="blue">Production</font>: <span style="background-color:#F1C40F">0.5-3 shift?</span> All
 
##
 
##
# <font color="blue">AT measurement</font>: <span style="background-color:#F1C40F">1.5 shift?</span>(<font color="red">plan needed</font>)
+
# <font color="blue">AT measurement</font>: <span style="background-color:#F1C40F">1.5 shift?</span> All (<font color="red">plan needed</font>)
 
## Do we need to verify zero longitudinal using Moller polarimeter?
 
## Do we need to verify zero longitudinal using Moller polarimeter?
 
## Carbon
 
## Carbon
 
## Lead
 
## Lead
 
## Calcium
 
## Calcium
# <font color="blue">Initial Moller commissioning</font> <span style="background-color:#F1C40F">1 shift</span>
+
# <font color="blue">Initial Moller commissioning</font> <span style="background-color:#F1C40F">1 shift</span> Simona M, Sanghwa P,
 
## minimal set for first absolute measurements  
 
## minimal set for first absolute measurements  
# <font color="blue">Initial Compton commissioning</font> <span style="background-color:#F1C40F">1 shift</span>
+
# <font color="blue">Initial Compton commissioning</font> <span style="background-color:#F1C40F">1 shift</span> Dave G, Juan Carlos C,
 
## minimal set for  measurement conditions
 
## minimal set for  measurement conditions
  

Revision as of 18:56, 9 June 2019

PREX Run Plan for   Commissioning   and   Auxiliary Measurements

See also the Daily Run Plan and Earlier Daily Run Plan

The experiment is approved for 35 PAC days including 25 production days. There are 49 days on our calendar.

Below is a list of tasks in the approximate time order, with person(s) responsible, approximate amount of time required, and comments about the conditions or needs. The time will, in most cases, be broken up into manageable chunks. For example, the GEM commissioning will occur in about 4 periods of time, each 4 hours, separated by at least one day. After commissioning we go into a regular production mode; we will provide an updated document webpage for shift worker instructions.

Total time: ?   Based on this list, each day we will come up with an adjustment to the Daily Run Plan. Some flexibility will be needed to accomodate problems and changes in plans.


Beam Restoration

  1. Basic beam setup 1 shift: Yves Roblin
    1. Establish beam to dump, through Compton chicane
    2. Design match to hall expected as part of original configuration, if additional beam time is required will be necessary to coordinate with optics/production runplan
    3. initial ion chamber calibration for beam interception (on ladder); tune beam->CG will investigate
  2. Source and Parity Quality Beam 0 shift (complete before 6/17): Caryn Palatchi, Amali Premathilake, Kent Paschke
    1. Source laser optics configuration and initial setpoints done
    2. Wein left/ Wein Right injector optics configuration done
    3. Characterize injector optics configuration in progress


Low current checkout

  1. Basic beam setup:
    1. MCC 1 shift Yves Roblin, Ciprian G
      1. beam transport through Compton chicane @5uA (rates in finger scintillators)
      2. spot size at target (harps)
      3. turn on septum and verify still on dump (viewer available?!); clean transport to dump for PREX set points
      4. 1 arm running (Q1 on) test to see beam motion (Yves and Ciprian)
    2. Hall 0.5 shift: Ciprian G
      1. harp scans for BPM calibrations and raster check
      2. Bullseye scan
      3. low current beam monitoring (cavities) --> maybe this will be xchecked with HRS rates
  2. Warm target position 0.5 shift Sanghwa P:
    1. use spot++ to find carbon hole
    2. Put in Ta or this-C target. Scan few mm up-down, left-right, verify from rates we're not hitting a frame.
      1. first check of SAMs at low current
  3. Cold target position 0.5 shift Chandan G, Sanghwa P:
    1. use spot++ to find carbon hole
  4. Collimator checkout 0.5 shift Ye T, Ciprian G:
    1. check rates with SAMs
    2. moderate CW and thick C/Ta target so we can check temps (need a simulation for collimator power for C/Ta target)


Spectrometer Commissioning

Detailed Optics Plan

  1. tracking checkout - Tune B configuration 1 shift: Bob M, Ryan R, Chandan G
    1. Sieve IN: initial checkout
      1. put in C/Ta target; check rates with scalars
      2. VDC + GEM checkout; look at tracks, VDC spectra; (GEM):noise, pulse-heights, tracks
      3. Sieve reconstruction verification
  2. Tune septum and HRS magnets - Sieve IN 1 shift Nilanga L, Chandan G, Ryan R:
    1. tune septum for the central ray (quad scans)
    2. inner edge verification
    3. Q1 acceptance scan
  3. Small spot at quartz: Sieve OUT 1 shift Bob M, Ye T:
    1. modify tune to get small spot at quartz (with raster on)
  4. Optics calibration data - Sieve IN 0.5 shiftChandan G, Ryan R:
    1. spectrometer momentum scan
  5. Water cell pointing 0.5 shiftChandan G, Ryan R:
    1. Sieve IN: pointing measurement
  6. Quartz detector checkout 1 shift: Dustin M,
    1. thin C, low current, no raster, Sieve OUT: positions Plan
    2. PMT spectra
    3. rates
    4. stub check?!
  7. Q2 measurement 0.5 shift Sanghwa P, Caryn P:
    1. Production target


High current checkout

  1. Basic setup 0.5 shift Yves R, Ciprian G:
    1. No target: high current setup through Compton (backgrounds on fingers and Compton MD) -- try to go to 70uA (or max, no less than 40uA)
  2. High current with target 0.5 shift Ciprian G, Dustin M:
    1. Pb target, raster on: Ion chamber calibration (near target): Ciprian Gmore details needed
    2. Detector and SAM voltages Dustin M
  3. Beamline instrumentation calibration 0.5 shift Caryn P,
    1. Current ramp for BPM/BCM calibrations and detector pedestals
  4. Initial production condition test 0.25 shift Caryn P,
    1. detector and SAM widths
    2. regression sensitivities
    3. beam noise and asymmetry check
    4. collimator water and thermocouple temperatures,
    5. radiation monitors and ion chamber stability
  5. Width studies 0.5 shift KK,
    1. detector and SAM widths, targets, shutters, etc
    2. deinstall shutters at conclusion of test


Establish Production Conditions

  1. Spin Dance 1 shift: Simona Malace, Sanghwa Park
    1. Moller polarimeter commissioning (establish beam) (plan needed)
    2. Short spin dance (run plan needed, established optimal spin angle for this Wien state) (plan needed)
  2. Hall PQB 1 shift Caryn P,:
    1. Check asymmetries in the hall
    2. Adiabatic dampening / Matching (plan needed)
      1. Use helicity magnets to tune phase trombone
    3. Establish feedback
  3. Beam modulation 0.5 shift Ye T,:
    1. turn on and set amplitudes (plan needed)
    2. test orthogonality
  4. Detector checkout 1 shift Dustin M:
    1. quartz detector stub test (plan needed)
    2. width study (plan needed)
    3. raster sync (plan needed)
  5. Production: 0.5-3 shift? All
  6. AT measurement: 1.5 shift? All (plan needed)
    1. Do we need to verify zero longitudinal using Moller polarimeter?
    2. Carbon
    3. Lead
    4. Calcium
  7. Initial Moller commissioning 1 shift Simona M, Sanghwa P,
    1. minimal set for first absolute measurements
  8. Initial Compton commissioning 1 shift Dave G, Juan Carlos C,
    1. minimal set for measurement conditions


Start Production

Important Activities After First Few Days

  1. Linearity Studies --
  2. Background Studies --
    1. Scans of Septum Magnet and HRS Dipole
    2. Thin Lead Target to check for inelastics at high-resolution
    3. Thin C12 to measure diamond background
  3. Possible scan of Q1 to optimize acceptance and verify that collimator defines acceptance. (old idea, still relevant?)

Polarimetry Studies

  1. Compton Commissioning --   Gaskell, et.al.
    1. Beam Tune, Background reduction -- Bteam,
    2. Compton Cavity Checkout --
    3. Photon Detector Checkout -- CMU group
  2. Moller Commissioning -- Simona Malace, Don Jones, et.al.
    1. Magnet Alignment -- 1 shift (swing)
    2. Raster size and pulse-mode -- 1 shift (day)
    3. Target commissioning - 3 shifts
    4. Pulse-mode target commissioning - 2 shifts
    5. DAQ checkout -- 1 shift


Important Activities During run

  1. Linearity Studies --
  2. Background Studies --
  3. Repeat Q2 and pointing measurements
  4. Arc Energy Measurement