Difference between revisions of "Optimize Detector Settings"

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*Activities
 
*Activities
  
−
# (High) Re-establish the beam and measure the position at the:
+
# Re-establish the beam and measure the position at the:
 
#* Tagger Dump (electron beam) <math>\Box</math>
 
#* Tagger Dump (electron beam) <math>\Box</math>
 
#** <span style="color:#ff00ff">Procedure monitoring beam position at Tagger dump</span>
 
#** <span style="color:#ff00ff">Procedure monitoring beam position at Tagger dump</span>
Line 38: Line 38:
 
#** System expert: Alexander Somov
 
#** System expert: Alexander Somov
 
#** <span style="color:#ff00ff">Procedure to extract beam position at scanner</span>
 
#** <span style="color:#ff00ff">Procedure to extract beam position at scanner</span>
−
# (High) Compare the beam position measurements. Consider moving the collimator from the nominal position if deviations of >5 mm are observed <math>\Box</math>
+
# Compare the beam position measurements. Consider moving the collimator from the nominal position if deviations of >5 mm are observed <math>\Box</math>
−
# (High) Re-calibrate the Active Collimator in X (use the slide) and Y, without the Profiler in front (Hall D).
+
# Re-calibrate the Active Collimator in X (use the slide) and Y, without the Profiler in front. <math>\Box</math>
−
# (High) Move the collimator 5 mm hole in X, &plusmn;30 mm around the center in order to calibrate the Active Collimator X-response. Leave the collimator in the nominal position (0.5 mm hole at the nominal center)  (Hall D)
+
#* Move the collimator 5 mm hole in X, &plusmn;30 mm around the center in order to calibrate the Active Collimator X-response. Use 5mm step size. Leave the collimator in the nominal position (0.5 mm hole at the nominal center)  <math>\Box</math>
−
# (Moderate) Request control access, rotate the Active collimator by 90 degree. To rotate collimator should take about 5min. Accessing the Hall, leaving it and requesting beam should take 1h. Assumed total time: 2h.  (Hall D)
+
#** System expert: Richard Jones/Hovanes Egyian
−
# (Moderate) Move the collimator 5 mm hole in X, &plusmn;30 mm to calibrate the Active Collimator Y-response. Leave the collimator in the nominal position (0.5 mm hole at the nominal center)  (Hall D)
+
#** <span style="color:#ff00ff">Procedure for moving the primary collimator</span>
−
# (Moderate) If the Active Collimator data provides a better position accuracy - move the beam in Y accordingly (Hall D/Accelerator)
+
#** <span style="color:#ff00ff">Procedure for reading beam X-position from the Active Collimator</span>
−
# (High) Turn on the Start Counter (ST). Check the rate asymmetry (Hall D)
+
#* Recalibrate x-scale of the Active Collimator <math>\Box</math>
−
# (Moderate) Move the collimator &plusmn;10mm and check the rates on the ST (Hall D)
+
#* Verify that the motion moves the beam spot at the profilers, while monitoring rates on pair spectrometer for scrapping. <math>\Box</math>
−
# (High) Set the solenoid current to 1000 A (Hall D)
+
#* If the Active Collimator data provides a better position accuracy - move the beam in X accordingly <span style="color:#ff00ff">(time estimate: ???)</span> <math>\Box</math>
−
# (High) Turn on the detectors one by one from the periphery to the center monitoring the rates without and with the beam (Hall D)   
+
#* Ask MCC to move the beam in X &plusmn;10 mm around center. Use 2mm step size. Verify that the beam X-position from the Active Collimator matches  <math>\Box</math>
−
# (High) Control Access: install the cup target (2mm and 7mm thick) into the central position in Z (Hall D)
+
#* Ask MCC to move the beam in Y &plusmn;10 mm around center. Use 2mm step size. calibrate the Active Collimator response <math>\Box</math>
−
# (High) Re-establish beam (Accelerator)
+
# Verification of the y-scale calibration for the Active collimator. <math>\Box</math>
−
# (High) Verify the standard BCAL vs FCAL trigger (timing and thresholds) - about 4h (Hall D)
+
#* Request control access, rotate the Active collimator by 90 degree. To rotate collimator should take about 5min. Accessing the Hall, leaving it and requesting beam should take 1h. Assumed total time: 2h.  <math>\Box</math>
−
# (High) Take 1 shift of data (Hall D)
+
#** System expert: Richard Jones
−
# (Medium) Measure the rates and radiation levels with the 11&middot;10<sup>-5</sup> R.L. radiator
+
#** <span style="color:#ff00ff">Procedure for rotating the primary collimator</span>
−
 
+
#* Move the collimator 5 mm hole in X, &plusmn;30 mm to calibrate the Active Collimator Y-response. Leave the collimator in the nominal position (0.5 mm hole at the nominal center)  <math>\Box</math>
 +
#* If the Active Collimator data provides a better position accuracy - move the beam in Y accordingly <math>\Box</math>
 +
# Turn on the detectors to check for azimuthal asymmetries <math>\Box</math>
 +
#* Turn BCAL detector on slowly. Check scaler rates. Monitor the rates and background levels. <span style="color:#ff00ff">(time estimate: ???)</span> <math>\Box</math>
 +
#** System expert: Elton Smith
 +
#** <span style="color:#ff00ff">Procedure for turning on BCal </span>
 +
#** <span style="color:#ff00ff">Procedure to check rates </span>
 +
#* Turn Start Counter detector on slowly. Check scaler rates. Monitor the rates and background levels. <span style="color:#ff00ff">(time estimate: ???)</span> <math>\Box</math>
 +
#** System expert: Mark Ito
 +
#** <span style="color:#ff00ff">Procedure for turning on Start Counter </span>
 +
#** <span style="color:#ff00ff">Procedure to check rates </span>
 +
#* Turn FCAL detector on slowly. Check scaler rates. Monitor the rates and background levels. <span style="color:#ff00ff">(time estimate: ???)</span> <math>\Box</math>
 +
#** System expert: Manual Lara
 +
#** <span style="color:#ff00ff">Procedure for turning on FCal </span>
 +
#** <span style="color:#ff00ff">Procedure to check rates </span>
 +
#* Turn TOF detector on slowly. Check scaler rates. Monitor the rates and background levels. <span style="color:#ff00ff">(time estimate: ???)</span> <math>\Box</math>
 +
#** System expert: Mark Ito
 +
#** <span style="color:#ff00ff">Procedure for turning on the TOF </span>
 +
#** <span style="color:#ff00ff">Procedure to check rates </span>
 +
#* Turn CDC detector on slowly. Check scaler rates. Monitor the rates and background levels. <span style="color:#ff00ff">(time estimate: ???)</span> <math>\Box</math>
 +
#** System expert: Benedikt Zihlmann. 
 +
#** <span style="color:#ff00ff">Procedure for turning on CDC </span>
 +
#** <span style="color:#ff00ff">Procedure to check rates </span>
 +
#* Turn FDC detector on slowly. Check scaler rates. Monitor the rates and background levels. <span style="color:#ff00ff">(time estimate: ???)</span> <math>\Box</math>
 +
#** System expert: Lubomir Pentchev
 +
#** <span style="color:#ff00ff">Procedure for turning on FDC </span>
 +
#** <span style="color:#ff00ff">Procedure to check rates </span>
 +
# Set the solenoid current to 1000 A and check rates (time estimate: 2h) <math>\Box</math>
 +
#** System expert: Yi Qiang
 +
#** <span style="color:#ff00ff">Procedure for monitoring and controlling Soleinoid current</span>
 +
# Move the collimator &plusmn;10mm and check the rates on the Start Counter <math>\Box</math>
 +
# Minimize possible azimuthal asymmetries by adjusting the collimator or target assembly <math>\Box</math>
 +
# Control Access: install the triangle hole target into the central position in Z (time estimate: 1h)  <math>\Box</math>
 +
#** System expert: Alexandre Deur
 +
#** <span style="color:#ff00ff">Procedure installing solid target</span>
 +
# Re-establish beam
 +
# Move the collimator 5 mm hole in X to find the edges of the triangles. Do not exceed the range X, &plusmn;50 mm.  <math>\Box</math>
 +
#* Deduce the beam position at nominal collimator poistion. The triangle hole is centered on the expected nominal x=0,y=0. beam position beam edge lengths are 2.5 cm.
 +
# Control Access: install the cross target into the central position in Z (time estimate: 1h) <math>\Box</math>
 +
# Re-establish beam
 +
# Take one shift of data. Reconstruct target profile (8h) <math>\Box</math>
 +
# Verify the standard BCAL vs FCAL trigger (timing and thresholds) - about 4h
 +
# Establish neam purity. <math>\Box</math>
 +
#* Remove the radiator (5 min). <math>\Box</math>
 +
#** System expert: Hovanes Egyian
 +
#** <span style="color:#ff00ff">Procedure for inserting radiator </span>
 +
#* Run with radiator off.
 
[https://hdops.jlab.org/wiki/index.php/Fall_2014_Commissioning_Plan Back to main Fall14 commissioning page]
 
[https://hdops.jlab.org/wiki/index.php/Fall_2014_Commissioning_Plan Back to main Fall14 commissioning page]

Revision as of 15:34, 21 August 2014

  • Goal: Finalize the photon beam commissioning. Verify optimal settings for detectors.
  • Responsibility: HallD
  • Conditions:
  1. Hall D controlled quadrupole MQPAD00 remained turned off. \Box \Box
    • Responsibility: MCC
  2. Monitoring available in counting room:
    • control screens \Box \Box
    • alarm handlers \Box \Box
    • relevant MCC screens \Box \Box
    • Procedure for bringing up control/MCC/alarm screens
    • System expert: David Lawrence.
  3. Tagger hall equipment in place and operating. \Box
  4. Beam 50nA CW
  5. Radiator is 1.7 10-5.\Box
  6. Pair spectrometer field on, converter inserted \Box
    • System expert: Alexander Somov
    • Procedure for turning on Pair Spectrometer field
    • Procedure for inserting/removing converters
  7. Collimator hole is 5mm.\Box
  8. Solenoid on at 300A.\Box
  9. 1st Profiler in front of the Solenoid and surveyed. 2nd profiler remains in front of beam dump.\Box
  10. GlueX detectors are on.\Box
  11. No target.\Box
  • Activities
  1. Re-establish the beam and measure the position at the:
    • Tagger Dump (electron beam) \Box
      • Procedure monitoring beam position at Tagger dump
    • Active collimator \Box
      • System expert: Richard Jones/Hovanes Egyian
      • Procedure for reading beam position from the Active collimator
    • 2 Profilers (Hall D).\Box
      • System expert: Hovanes Egyian
      • Procedure for getting beam position with first profiler
    • Pair Spectrometer harp (Hall D).\Box
      • System expert: Alexander Somov
      • Procedure to extract beam position at scanner
  2. Compare the beam position measurements. Consider moving the collimator from the nominal position if deviations of >5 mm are observed \Box
  3. Re-calibrate the Active Collimator in X (use the slide) and Y, without the Profiler in front. \Box
    • Move the collimator 5 mm hole in X, ±30 mm around the center in order to calibrate the Active Collimator X-response. Use 5mm step size. Leave the collimator in the nominal position (0.5 mm hole at the nominal center) \Box
      • System expert: Richard Jones/Hovanes Egyian
      • Procedure for moving the primary collimator
      • Procedure for reading beam X-position from the Active Collimator
    • Recalibrate x-scale of the Active Collimator \Box
    • Verify that the motion moves the beam spot at the profilers, while monitoring rates on pair spectrometer for scrapping. \Box
    • If the Active Collimator data provides a better position accuracy - move the beam in X accordingly (time estimate: ???) \Box
    • Ask MCC to move the beam in X ±10 mm around center. Use 2mm step size. Verify that the beam X-position from the Active Collimator matches \Box
    • Ask MCC to move the beam in Y ±10 mm around center. Use 2mm step size. calibrate the Active Collimator response \Box
  4. Verification of the y-scale calibration for the Active collimator. \Box
    • Request control access, rotate the Active collimator by 90 degree. To rotate collimator should take about 5min. Accessing the Hall, leaving it and requesting beam should take 1h. Assumed total time: 2h. \Box
      • System expert: Richard Jones
      • Procedure for rotating the primary collimator
    • Move the collimator 5 mm hole in X, ±30 mm to calibrate the Active Collimator Y-response. Leave the collimator in the nominal position (0.5 mm hole at the nominal center) \Box
    • If the Active Collimator data provides a better position accuracy - move the beam in Y accordingly \Box
  5. Turn on the detectors to check for azimuthal asymmetries \Box
    • Turn BCAL detector on slowly. Check scaler rates. Monitor the rates and background levels. (time estimate: ???) \Box
      • System expert: Elton Smith
      • Procedure for turning on BCal
      • Procedure to check rates
    • Turn Start Counter detector on slowly. Check scaler rates. Monitor the rates and background levels. (time estimate: ???) \Box
      • System expert: Mark Ito
      • Procedure for turning on Start Counter
      • Procedure to check rates
    • Turn FCAL detector on slowly. Check scaler rates. Monitor the rates and background levels. (time estimate: ???) \Box
      • System expert: Manual Lara
      • Procedure for turning on FCal
      • Procedure to check rates
    • Turn TOF detector on slowly. Check scaler rates. Monitor the rates and background levels. (time estimate: ???) \Box
      • System expert: Mark Ito
      • Procedure for turning on the TOF
      • Procedure to check rates
    • Turn CDC detector on slowly. Check scaler rates. Monitor the rates and background levels. (time estimate: ???) \Box
      • System expert: Benedikt Zihlmann.
      • Procedure for turning on CDC
      • Procedure to check rates
    • Turn FDC detector on slowly. Check scaler rates. Monitor the rates and background levels. (time estimate: ???) \Box
      • System expert: Lubomir Pentchev
      • Procedure for turning on FDC
      • Procedure to check rates
  6. Set the solenoid current to 1000 A and check rates (time estimate: 2h) \Box
      • System expert: Yi Qiang
      • Procedure for monitoring and controlling Soleinoid current
  7. Move the collimator ±10mm and check the rates on the Start Counter \Box
  8. Minimize possible azimuthal asymmetries by adjusting the collimator or target assembly \Box
  9. Control Access: install the triangle hole target into the central position in Z (time estimate: 1h) \Box
      • System expert: Alexandre Deur
      • Procedure installing solid target
  10. Re-establish beam
  11. Move the collimator 5 mm hole in X to find the edges of the triangles. Do not exceed the range X, ±50 mm. \Box
    • Deduce the beam position at nominal collimator poistion. The triangle hole is centered on the expected nominal x=0,y=0. beam position beam edge lengths are 2.5 cm.
  12. Control Access: install the cross target into the central position in Z (time estimate: 1h) \Box
  13. Re-establish beam
  14. Take one shift of data. Reconstruct target profile (8h) \Box
  15. Verify the standard BCAL vs FCAL trigger (timing and thresholds) - about 4h
  16. Establish neam purity. \Box
    • Remove the radiator (5 min). \Box
      • System expert: Hovanes Egyian
      • Procedure for inserting radiator
    • Run with radiator off.

Back to main Fall14 commissioning page

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