Difference between revisions of "June 29, 2022"

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* Accelerator status:                                                                                                                                                                                     
 
* Accelerator status:                                                                                                                                                                                     
 
**RF recovery and access to tunnel made yesterday
 
**RF recovery and access to tunnel made yesterday
−
**After the down we could only get to 25 uA
+
**After the down we could only get to 25 uA (BLM trips on 8E02 which is just before the BSY)
 
**Down for the day as more work is done to get us to higher current (RF restoration, try magnetic extraction, look at 8E02 BLM on scope,......)
 
**Down for the day as more work is done to get us to higher current (RF restoration, try magnetic extraction, look at 8E02 BLM on scope,......)
 
* Experiment status:                                                                                                                                                                                       
 
* Experiment status:                                                                                                                                                                                       
 
** pionLT continues to make progress on run plan, though we are still behind schedule, unless Ops is able to deliver 80 uA at >50% efficiency  
 
** pionLT continues to make progress on run plan, though we are still behind schedule, unless Ops is able to deliver 80 uA at >50% efficiency  
−
** On page 91 of run plan 3 10% of LD2 data collected.  Dummy data taken for this setting on OWL.  Current Setting: Q2=3.85, W=3.07, x=0.31, high ε data taking.
+
** On page 91 of run plan 10% of LD2 data collected.  Dummy data taken for this setting on OWL.  Current Setting: Q2=3.85, W=3.07, x=0.31, high ε data taking.
 
** Q2 power supply was repaired yesterday
 
** Q2 power supply was repaired yesterday
 
** Drift chamber noise is absent in latest runs
 
** Drift chamber noise is absent in latest runs
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*Keep on eye on HMS DC chamber wire maps. See current issues
 
*Keep on eye on HMS DC chamber wire maps. See current issues
 
*
 
*
−
*Contact Brad S. before next spectrometer rotation unless (OWL shift)
+
*Contact Brad S. before next SHMS spectrometer rotation unless (OWL shift)
  
 
= Current Issues =
 
= Current Issues =
 +
* BCM gains and offsets need updating https://logbooks.jlab.org/entry/4007884  https://logbooks.jlab.org/entry/4008646
 +
* Partially resolved: HMS DC Noise  https://logbooks.jlab.org/entry/4008620
  
−
= Planned Accesses to the Hall =                                                                                                                                                                        
+
= Planned Accesses to the Hall =
−
** Need new plan to address HMS DC noise.  Check thresholds on cards, low voltages, check grounding, add copper tape, and follow Brad's suggestions.  Last resort we can swap nanometrics card.
 
−
 
 
−
** Will notify SoLID parasitic group to see if they need access
 
  
 
= Planned Accelerator Configuration Changes =
 
= Planned Accelerator Configuration Changes =
−
* Possibly take down machine Monday to get us to higher currents
 
  
 
= Special Requests =                                                                                                                                                                                       
 
= Special Requests =                                                                                                                                                                                       
−
* Install telegram on RC Phone (DONE)
+
* Contact Brad S. if rotating SHMS at a decent hour

Latest revision as of 09:55, 29 June 2022

Current Status

  • Accelerator status:
    • RF recovery and access to tunnel made yesterday
    • After the down we could only get to 25 uA (BLM trips on 8E02 which is just before the BSY)
    • Down for the day as more work is done to get us to higher current (RF restoration, try magnetic extraction, look at 8E02 BLM on scope,......)
  • Experiment status:
    • pionLT continues to make progress on run plan, though we are still behind schedule, unless Ops is able to deliver 80 uA at >50% efficiency
    • On page 91 of run plan 10% of LD2 data collected. Dummy data taken for this setting on OWL. Current Setting: Q2=3.85, W=3.07, x=0.31, high ε data taking.
    • Q2 power supply was repaired yesterday
    • Drift chamber noise is absent in latest runs

Current Run Plan

pionLT Summer 2022 Run Plan

Physics Status

Notices in Effect for Shift Crew

  • Please pro-rate ABU for max current limit in run plan (uA) in beam time accounting. For example, if we receive 15 uA instead of the max_current_limit in the run plan, then the ABU should be: ABU_prorated = 15/(max current limit) * ABU
  • Check the HMS/SHMS rates for when production starts, since for Heep coin. production SHMS saw higher rates. Make sure shift crew takes snapshot of scalers at every setting
  • When analyzing LD2 or Al dummy or LH2, please leave the target_mass_amu in the standard.kinematics as that of the proton, but when analyzing the data with the pionLT script, specify the target used, as different targets will have different ranges in the cuts when integrating the missing mass peak. Refer to log entry: https://logbooks.jlab.org/entry/4005387 These instructions are given in the pionLT run plan.
  • Keep on eye on HMS DC chamber wire maps. See current issues
  • Contact Brad S. before next SHMS spectrometer rotation unless (OWL shift)

Current Issues

Planned Accesses to the Hall

Planned Accelerator Configuration Changes

Special Requests

  • Contact Brad S. if rotating SHMS at a decent hour
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