Difference between revisions of "PREX2RunPlan2019"

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== Beam Restoration ==
 
== Beam Restoration ==
# <font color="blue">Basic beam setup</font>: Yves Roblin,
+
# <font color="blue">Basic beam setup</font> <font color="maroon">1 shift</font>: Yves Roblin  
## Establish beam to dump, through compton chicane
+
## Establish beam to dump, through Compton chicane
 
## 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
 
## 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
## initial ion chamber calibration for beam interception (on ladder); tune beam->CG
+
## initial ion chamber calibration for beam interception (on ladder); <font color="red"> tune beam->CG will investigate</font>
# <font color="blue">Source and Parity Quality Beam</font>: Caryn Palatchi, Amali Premathilake, Kent Paschke
+
# <font color="blue">Source and Parity Quality Beam</font>  <font color="maroon">expected to be done before Monday</font>: Caryn Palatchi, Amali Premathilake, Kent Paschke
 
## Source laser optics configuration and initial setpoints <font color="green"> done </font>
 
## Source laser optics configuration and initial setpoints <font color="green"> done </font>
 
## Wein left/ Wein Right injector optics configuration <font color="green"> done </font>
 
## Wein left/ Wein Right injector optics configuration <font color="green"> done </font>
Line 23: Line 23:
 
== Low current checkout ==
 
== Low current checkout ==
 
# <font color="blue">Basic beam setup</font>:
 
# <font color="blue">Basic beam setup</font>:
## MCC
+
## MCC <font color="maroon">1 shift</font>
 
### beam transport through Compton chicane @5uA (Yves Roblin, rates in finger scintillators)
 
### beam transport through Compton chicane @5uA (Yves Roblin, rates in finger scintillators)
 
### spot size at target (harps)
 
### spot size at target (harps)
 
### turn on septum and very still on dump (viewer available?!); clean transport to dump
 
### turn on septum and very still on dump (viewer available?!); clean transport to dump
## Hall
+
## Hall <font color="maroon">0.5 shift</font>
 
### 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>:
+
# <font color="blue">Warm target position </font> <font color="maroon">0.5 shift</font>:
 
## 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>:
+
# <font color="blue">Cold target position</font> <font color="maroon">0.5 shift</font>:
 
## use spot++ to find carbon hole
 
## use spot++ to find carbon hole
# <font color="blue">Collimator checkout</font>:
+
# <font color="blue">Collimator checkout </font> <font color="maroon">0.5 shift</font>:
 
## 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)
# <font color="blue">Septum + Q1 checkout</font>:  
+
# <font color="blue">Septum + Q1 checkout</font> <font color="maroon">0.5 shift</font>:  
 
## clean transport to dump for PREX set points
 
## 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)
Line 47: Line 47:
 
== Spectrometer Commissioning ==
 
== Spectrometer Commissioning ==
 
[https://prex.jlab.org/DocDB/0003/000378/002/opticsplan_may24.pdf|<font color="magenta">'''Detailed Optics Plan'''</font>]
 
[https://prex.jlab.org/DocDB/0003/000378/002/opticsplan_may24.pdf|<font color="magenta">'''Detailed Optics Plan'''</font>]
# <font color="blue">tracking checkout - Tune B configuration</font>: Bob M, Ryan R
+
# <font color="blue">tracking checkout - Tune B configuration</font> <font color="maroon">1 shift</font>: Bob M, Ryan R
 
## Sieve IN: initial checkout  
 
## Sieve IN: initial checkout  
 
### put in C/Ta target; check rates with scalars
 
### put in C/Ta target; check rates with scalars
 
### VDC + GEM checkout; look at tracks, VDC spectra; (GEM):noise, pulse-heights, tracks
 
### VDC + GEM checkout; look at tracks, VDC spectra; (GEM):noise, pulse-heights, tracks
 
### Sieve reconstruction verification
 
### Sieve reconstruction verification
# <font color="blue">Tune septum and HRS magnets - Sieve IN</font>:  
+
# <font color="blue">Tune septum and HRS magnets - Sieve IN</font> <font color="maroon">1 shift</font>:  
 
## tune septum for the central ray (quad scans)
 
## tune septum for the central ray (quad scans)
 
## inner edge verification
 
## inner edge verification
 
## Q1 acceptance scan
 
## Q1 acceptance scan
# <font color="blue">Small spot at quartz: Sieve OUT</font>:  
+
# <font color="blue">Small spot at quartz: Sieve OUT</font> <font color="maroon">1 shift</font>:  
 
## modify tune to get small spot at quartz (with raster on)
 
## modify tune to get small spot at quartz (with raster on)
# <font color="blue">Optics calibration data - Sieve IN</font>:  
+
# <font color="blue">Optics calibration data - Sieve IN</font> <font color="maroon">0.5 shift</font>:  
 
## spectrometer momentum scan  
 
## spectrometer momentum scan  
# <font color="blue">Water cell pointing</font>:
+
# <font color="blue">Water cell pointing</font> <font color="maroon">0.5 shift</font>:
 
## Sieve IN: pointing measurement
 
## Sieve IN: pointing measurement
# <font color="blue">Quartz detector checkout</font>: Dustin M,  
+
# <font color="blue">Quartz detector checkout</font> <font color="maroon">1 shift</font>: Dustin M,  
 
## thin C, low current, no raster, Sieve OUT:  positions [[Media:quartzAlignmentRunPlan.pdf|<font color="magenta">Plan</font>]]
 
## thin C, low current, no raster, Sieve OUT:  positions [[Media:quartzAlignmentRunPlan.pdf|<font color="magenta">Plan</font>]]
 
## PMT spectra
 
## PMT spectra
 
## rates
 
## rates
 
## stub check?!
 
## stub check?!
# <font color="blue">Q2 measurement</font>:
+
# <font color="blue">Q2 measurement</font> <font color="maroon">0.5 shift</font>:
 
## Production target
 
## Production target
  
  
 
== High current checkout ==
 
== High current checkout ==
# <font color="blue">Basic setup</font>:  
+
# <font color="blue">Basic setup</font> <font color="maroon">0.5 shift</font>:  
 
## 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>:  
+
# <font color="blue">High current with target</font> <font color="maroon">0.5 shift</font>:  
 
## 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 <font color="red">'''more details needed'''</font>
 
## Detector and SAM voltages
 
## Detector and SAM voltages
# <font color="blue">Beamline instrumentation calibration</font>
+
# <font color="blue">Beamline instrumentation calibration</font> <font color="maroon">0.5 shift</font>
 
## 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  (2 hours?) </font>
 
# <font color="blue"> Initial production condition test  (2 hours?) </font>
Line 91: Line 91:
  
 
== Establish Production Conditions ==
 
== Establish Production Conditions ==
# <font color="blue">Spin Dance</font>: Simona Malace, Sanghwa Park
+
# <font color="blue">Spin Dance</font> <span style="background-color:#F1C40F">1 shift</span>: Simona Malace, Sanghwa Park
 
## 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>:  
+
# <font color="blue">Hall PQB</font> <span style="background-color:#F1C40F">1 shift</span>:  
 
## 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>:  
+
# <font color="blue">Beam modulation</font> <span style="background-color:#F1C40F">0.5 shift</span>:  
 
## 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>:  
+
# <font color="blue">Detector checkout</font> <span style="background-color:#F1C40F">1 shift</span>:  
 
## 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>: (between 4 hours and 24 hours?)
+
# <font color="blue">Production</font>: <span style="background-color:#F1C40F">0.5-3 shift?</span>
 
##
 
##
# <font color="blue">AT measurement</font>: (<font color="red">plan needed</font>)
+
# <font color="blue">AT measurement</font>: <span style="background-color:#F1C40F">1.5 shift?</span>(<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> - minimal set for first absolute measurements  
+
# <font color="blue">Initial Moller commissioning</font> <span style="background-color:#F1C40F">1 shift</span>
# <font color="blue">Initial Compton commissioning</font> - minimal set for  measurement conditions
+
## minimal set for first absolute measurements  
 +
# <font color="blue">Initial Compton commissioning</font> <span style="background-color:#F1C40F">1 shift</span>
 +
## minimal set for  measurement conditions
  
  

Revision as of 17:36, 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 expected to be done before Monday: 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
      1. beam transport through Compton chicane @5uA (Yves Roblin, rates in finger scintillators)
      2. spot size at target (harps)
      3. turn on septum and very still on dump (viewer available?!); clean transport to dump
    2. Hall 0.5 shift
      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:
    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:
    1. use spot++ to find carbon hole
  4. Collimator checkout 0.5 shift:
    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)
  5. Septum + Q1 checkout 0.5 shift:
    1. clean transport to dump for PREX set points
    2. 1 arm running (Q1 on) test to see beam motion (Yves and Ciprian)


Spectrometer Commissioning

Detailed Optics Plan

  1. tracking checkout - Tune B configuration 1 shift: Bob M, Ryan R
    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:
    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:
    1. modify tune to get small spot at quartz (with raster on)
  4. Optics calibration data - Sieve IN 0.5 shift:
    1. spectrometer momentum scan
  5. Water cell pointing 0.5 shift:
    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:
    1. Production target


High current checkout

  1. Basic setup 0.5 shift:
    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:
    1. Pb target, raster on: Ion chamber calibration (near target): Ciprian more details needed
    2. Detector and SAM voltages
  3. Beamline instrumentation calibration 0.5 shift
    1. Current ramp for BPM/BCM calibrations and detector pedestals
  4. Initial production condition test (2 hours?)
    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 (2-4 hours?) (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:
    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:
    1. turn on and set amplitudes (plan needed)
    2. test orthogonality
  4. Detector checkout 1 shift:
    1. quartz detector stub test (plan needed)
    2. width study (plan needed)
    3. raster sync (plan needed)
  5. Production: 0.5-3 shift?
  6. AT measurement: 1.5 shift?(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
    1. minimal set for first absolute measurements
  8. Initial Compton commissioning 1 shift
    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