Difference between revisions of "CREXAuxiliaryMeasurements-Aug2020"

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|-
 
|-
 
|Day  (Thia/Bob)
 
|Day  (Thia/Bob)
| 10am - noon Beam studies (Install blind At PMT, Blind main Detector); noon - 4:15pm Beam available to ready Halls - we take data with blinded tubes, then access to restore US PMTs.
+
| 10am - noon Beam studies 1: Hall in Controlled Access (CA) - Install blind At PMT, Blind main Detector; noon - 4:15pm Beam available to ready Halls - we take data with blinded tubes.
 
| Devi required for tube blinding
 
| Devi required for tube blinding
 
|-
 
|-
|Swing (Devi/Eric)
+
|Swing (Weibin/Eric, Devi on-call)
| 4:15pm - 8:15pm Beam studies 2 Hall in Controlled Access (CA); 8:15pm - 9:15pm Beam recovery and onward delivery. Production.
+
| 4:15pm - 8:15pm Beam studies 2: Hall in CA - restore US PMTs, Compton e-Det work; 8:15pm - 9:15pm Beam recovery and onward delivery. Production.
 
|  
 
|  
 
|-
 
|-
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|
 
|
 
|-
 
|-
|Day (Simona/Eric/Rom)
+
|Day (Rom/Eric)
| 8am start Moller measurement. Sign check. SAD Safety Meeting 9-11am.
+
| SAD Safety Meeting 9-11am https://primetime.bluejeans.com/a2m/live-event/tkcbphay ; Production if beam available
 +
| 7:45am South Linac down, cold box trip in CHL1, recovery 11.5 hours
 
|-
 
|-
 
|Swing (Devi/Siyu)
 
|Swing (Devi/Siyu)
| 1. finish Moller measurement. 2. Back to production
+
| Beam recovery and on to production on Ca-48.
|  
+
| Compton rates too high, running straight.
 
|-
 
|-
 
|rowspan="3" | Wednesday Sept 16
 
|rowspan="3" | Wednesday Sept 16
 
|Owl (Bishnu/Victoria)
 
|Owl (Bishnu/Victoria)
 
| Production
 
| Production
|
+
| Running straight.
 
|-
 
|-
|Day (B.Yale/Siyu)
+
|Day (Simona/Eric/B.Yale - standby)
| Followed by raster and Target study
+
| 8am start Moller measurement. Sign check. Followed by raster and Target study
|
+
| Cameron supporting the raster study remotely and Bob locally.
 
|-
 
|-
|Swing (Devi/Eric)
+
|Swing (Devi/Tao)
| Complete raster and target study. Pedestal scans, PITA scan. Production
+
| Complete raster and target study. Production
|  
+
| No Compton.
 
|-
 
|-
 
|rowspan="3" | Thursday Sept 17
 
|rowspan="3" | Thursday Sept 17
 
|Owl (Victoria/Siyu)
 
|Owl (Victoria/Siyu)
 
|  Production.
 
|  Production.
|
+
| No Compton.
 
|-
 
|-
 
|Day (Rom/Weibin)
 
|Day (Rom/Weibin)
| Production
+
| Production.  Pedestal scans, PITA scan.
|
+
| No Compton.
 
|-
 
|-
 
|Swing (Zeke/Adam)
 
|Swing (Zeke/Adam)
 
| Production
 
| Production
|
+
| No Compton.
 
|-
 
|-
 
|rowspan="3" | Friday Sept 18
 
|rowspan="3" | Friday Sept 18
 
|Owl (Victoria/Siyu)
 
|Owl (Victoria/Siyu)
 
|6am '''SHUTDOWN'''
 
|6am '''SHUTDOWN'''
|
+
| CREX1 is done! Long live CREX2!
 
|-
 
|-
 
|Day (Rom/Weibin)
 
|Day (Rom/Weibin)
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#* See grid on [https://docs.google.com/spreadsheets/d/1SngpqgLLULtcuKD0t9k-A2Cpmxy1jb5bIYnnP8f8zPM/edit?usp=sharing optics data spreadsheet]
 
#* See grid on [https://docs.google.com/spreadsheets/d/1SngpqgLLULtcuKD0t9k-A2Cpmxy1jb5bIYnnP8f8zPM/edit?usp=sharing optics data spreadsheet]
 
# <font color="green">Energy Measurement</font> (Done)  
 
# <font color="green">Energy Measurement</font> (Done)  
#* I think this is complete.  I need to check with Doug.
+
#* Doug did a parasitic energy measurement Sun, Sep 13 at 20:24 [https://logbooks.jlab.org/entry/3847453].
  
 
== Backgrounds ==
 
== Backgrounds ==
# <font color="blue">Blinded At PMTs </font>  
+
# <font color="green">Blinded At PMTs </font> (Done)
 
#* Longish access to setup and back out, but short data taking period (production conditions).   
 
#* Longish access to setup and back out, but short data taking period (production conditions).   
 
#* Reconfigure AT PMTs to use blinding cap, attach to US PMTs.
 
#* Reconfigure AT PMTs to use blinding cap, attach to US PMTs.
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#* (Do we want counting mode measurement for rate in blinded At tube?)
 
#* (Do we want counting mode measurement for rate in blinded At tube?)
 
#* (yield only normalizable using table-gain gain curves).
 
#* (yield only normalizable using table-gain gain curves).
# <font color="blue">Blinded Main detector? </font>
+
# <font color="green">Blinded Main detector? </font> (Done)
 
#* Need 2 hours to blind main detectors. Then another hour after meaurement to unblind.  
 
#* Need 2 hours to blind main detectors. Then another hour after meaurement to unblind.  
 
#* short-ish yield runs in integrating mode.  
 
#* short-ish yield runs in integrating mode.  
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== Detectors ==
 
== Detectors ==
 
# <font color="blue">Linearity Studies (PITA + current scans)</font>  
 
# <font color="blue">Linearity Studies (PITA + current scans)</font>  
#* These are ongoing - should continue regularly. At least once more,maybe twice. 
+
#* These are ongoing - should continue regularly. One more, on last day.
#* Useful to have one after we get the blinded tubes in place.
+
 
#* Current scans for detector and BCM pedestals.  Skip the BPMs, I think.
 
#* Current scans for detector and BCM pedestals.  Skip the BPMs, I think.
 
# Linearity LED tests
 
# Linearity LED tests
 
#* This will be studied post run, during SAD
 
#* This will be studied post run, during SAD
#* detector crew were left off the SAD access list - Kent has repeated the request.
+
#* detector crew were left off the SAD access list - Access will be approved. Reapply for access.
  
 
== Other ==
 
== Other ==
# <font color="blue">Sign check</font>
+
# <font color="green">Sign check, done</font>
 
#* perform at next Moller polarimeter measurement
 
#* perform at next Moller polarimeter measurement
#* run Moller, Compton, and parity DAQ for quick PITA scan
+
#* run Moller, Compton, and parity DAQ for quick PITA scan [https://docs.google.com/document/d/1hdunZgxLKpdrSaBtFsRHE31_419UgXvv1TqUAicKaps/edit]
#<font color="blue">Target/Raster study</font>
+
# <font color="blue">Target/Raster study</font>
[https://docs.google.com/document/d/1WP7Xobv5MDoZw5vLTv2k9aAyliTah023J5YKx9A-s8k/edit run plan]
+
#* Set up for normal production mode.  Call in experts (Bob M in person, Cameron remote).
 +
#* With each raster change we start with a brief C12 run for safety, then do a brief Ca48 run.
 +
#* [https://docs.google.com/document/d/1WP7Xobv5MDoZw5vLTv2k9aAyliTah023J5YKx9A-s8k/edit Raster Scan Run Plan]
  
 
== Moller polarimetry ==
 
== Moller polarimetry ==
# <font color="blue">One more measurement</font>  
+
# <font color="green">One more measurement, done [https://logbooks.jlab.org/entry/3849466], [https://logbooks.jlab.org/entry/3849477] </font>
  
 
== Compton polarimetry ==
 
== Compton polarimetry ==
# <font color="blue">Spectrum run</font>
+
# <font color="green">Spectrum run</font>
# <font color="blue">Laser polarization changes</font>
+
# <font color="red">Laser polarization changes - aborted</font>
 
# <font color="blue">linearity studies</font> During SAD
 
# <font color="blue">linearity studies</font> During SAD

Latest revision as of 16:27, 16 September 2020


CREX Main << August 2020 CREX Run Plan


Schedule

  • This plan is evolving as we move along
Day, Date Shift Tasks (Responsible Party) Comments/Status
Saturday Sept 12 Owl Production DONE
Day Production DONE
Swing (Zeke/Pitt) Production DONE
Sunday Sept 13 Owl (Adam/Tao) Production. (No scans done.) 39 min ABU!
Day (Bob/Eric) Final Q2 measurement. Optics [1] Acc mostly down; Bob took escorted access and switched to Counting Mode
Swing (Zeke/Pitt) Optics [2] Sanghwa for Analysis and remote assistance. Mostly completed optics.
Monday Sept 14 Owl (Adam/Amali) Inelastic spectrum. Poletip study [3] Chandan for Analysis and remote assistance. Finished optics, inelastic spectrum, poletip study
Day (Thia/Bob) 10am - noon Beam studies 1: Hall in Controlled Access (CA) - Install blind At PMT, Blind main Detector; noon - 4:15pm Beam available to ready Halls - we take data with blinded tubes. Devi required for tube blinding
Swing (Weibin/Eric, Devi on-call) 4:15pm - 8:15pm Beam studies 2: Hall in CA - restore US PMTs, Compton e-Det work; 8:15pm - 9:15pm Beam recovery and onward delivery. Production.
Tuesday Sept 15 Owl (Adam/Amali) Pedestal Scans, PITA scan. Production.
Day (Rom/Eric) SAD Safety Meeting 9-11am https://primetime.bluejeans.com/a2m/live-event/tkcbphay ; Production if beam available 7:45am South Linac down, cold box trip in CHL1, recovery 11.5 hours
Swing (Devi/Siyu) Beam recovery and on to production on Ca-48. Compton rates too high, running straight.
Wednesday Sept 16 Owl (Bishnu/Victoria) Production Running straight.
Day (Simona/Eric/B.Yale - standby) 8am start Moller measurement. Sign check. Followed by raster and Target study Cameron supporting the raster study remotely and Bob locally.
Swing (Devi/Tao) Complete raster and target study. Production No Compton.
Thursday Sept 17 Owl (Victoria/Siyu) Production. No Compton.
Day (Rom/Weibin) Production. Pedestal scans, PITA scan. No Compton.
Swing (Zeke/Adam) Production No Compton.
Friday Sept 18 Owl (Victoria/Siyu) 6am SHUTDOWN CREX1 is done! Long live CREX2!
Day (Rom/Weibin) -----

Optics and Q2

  1. Q2 measurement (Done)
    • Repeat of Q2 measurement, with improved pedestal noise control.
    • Detector counting mode.
    • S0 trigger
    • production raster and beam position
  2. Optics Data (Done)
    • Sieve IN, dp=+1, 0, (maybe -1). Raster/no raster thin C, raster H20
    • Priority is 1 dp change (both arms!) plus backout, and 10 runs. Watercell runs should be long.
    • Assume 3 hours for magnet changes and 2 hours for data taking. ~ 1 shift
    • See grid on optics data spreadsheet
  3. Energy Measurement (Done)
    • Doug did a parasitic energy measurement Sun, Sep 13 at 20:24 [4].

Backgrounds

  1. Blinded At PMTs (Done)
    • Longish access to setup and back out, but short data taking period (production conditions).
    • Reconfigure AT PMTs to use blinding cap, attach to US PMTs.
    • This will be done during the long beam studies break on Monday
    • software blinding on the AT PMTs must be disabled
    • Check pedestal noise in counting and in integrating mode. We need low noise is the blinded tube, and we can't add noise to our main detector!
    • Integrating measurement for asymmetry measurement
    • (Do we want counting mode measurement for rate in blinded At tube?)
    • (yield only normalizable using table-gain gain curves).
  2. Blinded Main detector? (Done)
    • Need 2 hours to blind main detectors. Then another hour after meaurement to unblind.
    • short-ish yield runs in integrating mode.
      • Software blinding must be disabled on the blinded MD tubes for this study
    • short counting mode run to get relative rate
    • Then return. Keep AT blinded piggybacked for asymmetry measurement.
  3. Inelastic spectrum scan (Done)
    • Needs a detailed run plan
    • Counting mode. Current 0.5uA or so? Turn quartz HV off.
    • Measure dp spectrum form dp=nominal to dp=-25%, in 5% steps. Use LHRS only.
    • should scale all spectrometer magnets (including septum)
  4. Pole tip re-scattering (Done)
    • Counting mode (VDC tracking). Counting mode on detector is ok (and helpful) but not needed.
    • Q3 turned off.
    • Run three septum setpoints: nominal, -5%, and +5%. Need ~1M S0 trigger events per run (and more is better).

Detectors

  1. Linearity Studies (PITA + current scans)
    • These are ongoing - should continue regularly. One more, on last day.
    • Current scans for detector and BCM pedestals. Skip the BPMs, I think.
  2. Linearity LED tests
    • This will be studied post run, during SAD
    • detector crew were left off the SAD access list - Access will be approved. Reapply for access.

Other

  1. Sign check, done
    • perform at next Moller polarimeter measurement
    • run Moller, Compton, and parity DAQ for quick PITA scan [5]
  2. Target/Raster study
    • Set up for normal production mode. Call in experts (Bob M in person, Cameron remote).
    • With each raster change we start with a brief C12 run for safety, then do a brief Ca48 run.
    • Raster Scan Run Plan

Moller polarimetry

  1. One more measurement, done [6], [7]

Compton polarimetry

  1. Spectrum run
  2. Laser polarization changes - aborted
  3. linearity studies During SAD