[Halla_running] [New Logentry] RC Update -- Friday Nov 18

[brads at jlab.org]

Logentry Text:
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<h1><span id="Accelerator_and_Hall_Status" class="mw-headline">Accelerator and Hall Status</span></h1><ul><li>4th pass separator has prevented beam to Hall A since Wed afternoon. Repairs are underway and will continue today. Expectation is to begin beam restoration around noon on Friday<ul><li><strong>SL shifts cancelled for Thurs Swing, Friday OWL. TOs must report as planned.</strong></li></ul></li><li>GEM layer was successfully replaced yesterday (Wed)<ul><li>2 bad APV cards identified yesterday and fixed today</li><li>CODA pedestal configuration and Analyzer DB updates in progress</li></ul></li><li>Hall has been in Controlled Access since Wed evening with some periods in Power Permit</li><li>A set of cosmics runs were completed with 4 combinations of SBS and BB on/off (while under 'Power Permit')<ul><li>Grinch runs taken with LED pulser enabled<ul><li>NOTE: Some interaction between LED pulser and DAQ complicated this -- kudos to Maria for keeping and eye on this last nigh!
 t!</li></ul></li><li>Thresholds and latencies for HCAL and BBCAL updated for good cosmics triggers</li></ul></li></ul><p><strong>We are still planning to move to SBS-11 starting Monday, November 22.  That will be a ~2 day configuration change in the Hall (Mon/Tue) followed by a Pass change (Hall A 4-->5) on Wed Nov 24.</strong></p><p> </p><h1><span id="Pending_Issues" class="mw-headline">Pending Issues</span></h1><ul><li>Need to ensure the following before restarting production:<ul><li>HCAL latencies restored [Done]</li><li>BBCAL and HCal Thresholds restored</li><li>Confirm new UV layer HVs are in the alarm handler and are being logged/monitored correctly</li><li>GEM pedestals evaluated and loaded/tested for online pedestal suppression</li><li>GEM tracking software / analyzer updated and ready?</li><li>Restore Grinch LED pulser to 10 Hz [Done]</li></ul></li></ul><ul><li>Upcoming shift schedule issues <a class="external free" href="https://misportal.jlab.org/mis!
 /physics/shiftSchedule/?experimentRunId=GMn-2021" rel="nofollo!
 w">https://misportal.jlab.org/mis/physics/shiftSchedule/?experimentRunId=GMn-2021</a><ul><li>Will try to arrange for a Hall walkthrough Friday morning for a few folks</li><li>Several open TO positions starting Nov 24</li><li>emailed Albert to confirm he is OK for Sat/Sun OWL shifts (schedule indicates trade requested)<ul><li>Bogdan has agreed to pick up those shifts [Shift schedule updated]</li></ul></li></ul></li></ul><h1><span id="Subsystem_Updates" class="mw-headline">Subsystem Updates</span></h1><ul><li>The RC had to leave the meeting early to coordinate the controlled access to deal with the target vacuuum issue.</li></ul><ul><li>Hall Status:<ul><li>Presently in Controlled Access, may move to Power Permit overnight if further tests with fields on are requested.</li><li>Techs have some work in the Hall Friday morning (doesn't affect BB or SBS)</li><li>Hall A Walkthrough training planned for 10am for 3 people</li></ul></li></ul><ul><li>HCAL:<ul><li>HV issues from yesterd!
 ay have been resolved; HV in good shape</li><li>BBCAL and HCAL thresholds back to production settings</li><li>HCAL latencies set back to standard settings</li><li>HCAL timing investigated (LOG)<ul><li>similar plot requested from FADC timing to compare with 'real' TDC time</li><li>more to come</li></ul></li></ul></li></ul><ul><li>BBCal:<ul><li>First look at runs with different combinations of BB and SBS magnets on</li><li>general gain matching is looking uniform across the detector</li><li>will follow up with details on observed impact of fringe field</li></ul></li><li>Timing hodoscope:<ul><li>Request to continue cosmics</li><li>working on RF alignment</li></ul></li></ul><ul><li>Grinch:<ul><li>Pulser resetting has been returned to 10 Hz</li><li>Study of LED data taken under different BB+SBS conditions underway</li></ul></li></ul><ul><li>GEMS:<ul><li>J2 layer swapped with UVa U-V layer; 2 faulty APVs addressed</li><li>Online DB (zero suppression) completed</li><li>Analyzer DB!
  updates are in progress; DB updated with new geometry, etc completed; !
 Some preliminary track analysis from Cosmics data were done. Basic functionality checks out, but Andrew is working through the punch list.</li><li>When beam returns<ul><li>Plan for an HV scan on the new layer when beam returns</li><li>Take short run at low current to check 'best case' tracking</li></ul></li></ul></li></ul><ul><li>Beamline:<ul><li>David F is looking at scaler sanity checks with Paul</li></ul></li></ul><ul><li>DAQ:<ul><li>Alex was going to look at the instability associated with the GRINCH LED</li></ul></li><li>Replay analysis:<ul><li>Andrew is focussed on the GEM related updates after the layer swap</li><li>Needs new pedestals for the replaced APVs</li></ul></li></ul>

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