[Sbs] [New Logentry] RC Update [10/8/21]

[flay at jlab.org]

Logentry Text:
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We're entering the last few days before we bring beam into the Hall on Monday.  Teams are putting final touches on systems before we start running.  Jack and his team along with Accelerator are doing a lot of work to get our magnets in shape for Monday. The exact timing of closing the Hall will depend on the SBS and corrector magnets work.  Teams will be working through the weekend on this.  

Overview Since 4 pm 
- Jack and his team along with Accelerator are doing a lot of work to get the SBS and corrector magnets ready to go for Monday.  There's some hurdles with SBS with a power supply fault this evening, but a plan is in place for tomorrow.  See https://logbooks.jlab.org/entry/3920430.  
- Target motion test performed by Ralph (TO) and DF in coordination with MCC (https://logbooks.jlab.org/entry/3920395).  MCC sees the same encoder counts as our GUI.  Motion to some targets stopped by hardware limit.  Target ladder has been successfully returned to the Home position.  Dave Meekins cc'd on the post.  
- Paul made a lot of progress on getting sbsvme29 readout list working (https://logbooks.jlab.org/entry/3920408). This ROC has the beam line copies into the SBS bunker and scalers.   

Notes from the 3:15 pm meeting are below: 

RC Update: https://sbs.jlab.org/cgi-bin/DocDB/public/ShowDocument?docid=124

Analysis/Software
- Online software about ready to go
- Updated simulation estimates; magnet total absorber flag didn't change estimates much
- Improvements on clustering/tracking on GEMs
- Preparing for zero-field optics commissioning

GEMs
- Sean fixed latency issue
- Studies show conclusive evidence of Hall gas mixing system => significantly lower efficiency than pre-mixed
- Tomorrow: Put all GEMs on pre-mix gas.  **temporary fix for now**
  - At night: cosmics on pre-mix gas

DAQ
- Single DAQ mode now -- be careful about run transitions and modifying things as we're in the final approach 
- Will set up a VNC session open at all times showing the DAQ

HCAL
- Add copy of LED into cosmisc triggers in TS
- Working on documentation/run plan
- Finalizing plots in panguin
- Few final checks on energy calibration

BB CAL
- Combined effort with HCAL => lists of things to do, making things easy for shifters
- Coincidence studies in the Hall 

BB GRINCH
- Want to run tests with CO2; might fill with CO2 this weekend.
  - Not essential for running.  If we have to wait, this isn't a problem
- Finished adjusting the final 15 PMT HVs.  Want another pulser run to check ADC
- LED turn on/off can't be done remotely.  Alexandre will help with turning this into remote operation 

BB Hodoscopes
- Cosmics look good; FADCs installed, data looks good
- Working on software: replay/online display, calibration of timing
- Preparing How-To documentation



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This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/3920455
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