Difference between revisions of "Left Arm Checks"

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* Left Arm momentum (GeV)
 
* Left Arm momentum (GeV)
* Left Arm Q1, Q2, D, Q3 regulators on (yes/no, ask experts)?
+
* Left Arm Q1, Q2, D, Q3 regulators on (yes/no, ask experts)? Check the whiteboard for intended settings
* Left Arm cryo flow level OK? Yes/No He>60% (Ignore Nitrogen)
+
* Left Arm cryo flow level OK (Green)? Yes/No He>60% (Ignore Nitrogen)
 
* Left Arm NMR OK? Yes/No
 
* Left Arm NMR OK? Yes/No
* Left Arm Q1 Momentum (GeV/c) / current (A) / B-Field (+/-G)
+
** The NMR field readback is indicated in the "D-N" row of the GUI, the NMR meter is useful only at > ~GeV set points, so if the magnets are too low then the NMR readback will be useless and fluctuating wildly (in which case the Gauss meter readback is useful, indicated in the "D-G" row)
* Left Arm Q2 Momentum (GeV/c) / current (A) / B-Field (+/-G)
+
** The NMR read-back quality can also be determined by looking at the Oscilloscopes in CH main room rack CH01A02 (above the adaq2 terminal). If the NMR is locked then the triangle wave and NMR readback will be synced and locked onto eachother in both scopes.
* Left Arm D Momentum (GeV/c) / current (A) / B-Field (+/-G)
+
* Left Arm Q1 B-Field (+/-T), Momentum (GeV/c), Polarity (N/P), current (A)
* Left Arm Q3 Momentum (GeV/c) / current (A) / B-Field (+/-G)
+
* Left Arm Q2 B-Field (+/-T), Momentum (GeV/c), Polarity (N/P), current (A)
* Is Left VDC gas flow (top/bottom) on?
+
* Left Arm D B-Field (+/-T), Momentum (GeV/c), Polarity (N/P), current (A)
 +
* Left Arm Q3 B-Field (+/-T), Momentum (GeV/c), Polarity (N/P), current (A)
 +
* Is Left VDC gas flow (top/bottom, indicated by Orange "Gas Flow" panel in Hall A General Tools screen T_VDC/B_VDC l/h readbacks) on?
 
* Left VDC HV on (top/bottom)?
 
* Left VDC HV on (top/bottom)?
 
* VDC thresholds (All 4 values should be 3.0 V, yes/no) ?
 
* VDC thresholds (All 4 values should be 3.0 V, yes/no) ?
* Left Cerenkov HV on?
 
* Left Pion rejector HV on?
 
 
* Left s0/s2m HV on (s0 may be off for production, check with expert)?
 
* Left s0/s2m HV on (s0 may be off for production, check with expert)?
* Check online plots (y/n)? -LHRS
+
* Have you checked the quality of the most recent online plots for the Left ARM counting mode DAQ (if a run was taken during your shift)?
 
+
  
 
Next in checklist >> [[Right Arm Checks]]
 
Next in checklist >> [[Right Arm Checks]]

Revision as of 21:07, 23 June 2019

In the process of editing and updating this page. Please contact Juliette Mammei crowder@jlab.org with questions or suggestions.

PREX Main<< Information for Shift Takers<<Shift Checklist

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  • Left Arm momentum (GeV)
  • Left Arm Q1, Q2, D, Q3 regulators on (yes/no, ask experts)? Check the whiteboard for intended settings
  • Left Arm cryo flow level OK (Green)? Yes/No He>60% (Ignore Nitrogen)
  • Left Arm NMR OK? Yes/No
    • The NMR field readback is indicated in the "D-N" row of the GUI, the NMR meter is useful only at > ~GeV set points, so if the magnets are too low then the NMR readback will be useless and fluctuating wildly (in which case the Gauss meter readback is useful, indicated in the "D-G" row)
    • The NMR read-back quality can also be determined by looking at the Oscilloscopes in CH main room rack CH01A02 (above the adaq2 terminal). If the NMR is locked then the triangle wave and NMR readback will be synced and locked onto eachother in both scopes.
  • Left Arm Q1 B-Field (+/-T), Momentum (GeV/c), Polarity (N/P), current (A)
  • Left Arm Q2 B-Field (+/-T), Momentum (GeV/c), Polarity (N/P), current (A)
  • Left Arm D B-Field (+/-T), Momentum (GeV/c), Polarity (N/P), current (A)
  • Left Arm Q3 B-Field (+/-T), Momentum (GeV/c), Polarity (N/P), current (A)
  • Is Left VDC gas flow (top/bottom, indicated by Orange "Gas Flow" panel in Hall A General Tools screen T_VDC/B_VDC l/h readbacks) on?
  • Left VDC HV on (top/bottom)?
  • VDC thresholds (All 4 values should be 3.0 V, yes/no) ?
  • Left s0/s2m HV on (s0 may be off for production, check with expert)?
  • Have you checked the quality of the most recent online plots for the Left ARM counting mode DAQ (if a run was taken during your shift)?

Next in checklist >> Right Arm Checks