[Halla_running] [New Logentry] RC Update -- Sunday Nov 21

Sun Nov 21 16:05:02 EST 2021

Logentry Text:
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<h1><span id="Accelerator_and_Hall_Status" class="mw-headline">Accelerator and Hall Status</span></h1><ul><li>Hall A remains in Controlled Access, but is ready for beam (see 4th pass separator comments below).</li><li>GEM and Grinch experts have made a few short accesses for opportunistic debugging while we're down.</li></ul><ul><li>4th pass separator has prevented beam to Hall A since Wed afternoon.<ul><li>RF Separator work was unsuccessful as of 3pm Friday. <a class="external text" href="https://logbooks.jlab.org/entry/3946742" rel="nofollow">PD Update: 4th Pass IOT</a></li><li>Work on the 4th pass IOT has continued over the weekend. However, latest word is that no solution will be available until at least late-day shift on Monday (and that is still a little unclear). So, stay tuned...</li><li>There will be an interruption to all Halls when OPS is ready to try bringing the 4th pass separator back online.</li></ul></li></ul><h2><span id="Plans_for_the_next_few_days" class="!
 mw-headline">Plans for the next few days</span></h2><ul><li><strong> Hall A will move to Restricted Access at ~6am Monday morning for the configuration change to SBS-11</strong>(no Survey required)<ul><li>We will need to ensure that HVs are off and that it is safe for Techs to work on BB and SBS.</li><li>The change-over will happen over Monday and Tuesday and will require considerable work around the detector stacks and pivot</li><li>Hall A Technical staff has priority in that area</li><li>RadCon, Survey & Alignment are contacted and ready to go</li><li>We plan to complete the work by the end of Day shift on Tuesday.</li></ul></li><li>Depending on how stable the beam is to Hall C over the weekend, we are hoping to shift the pass change to Tuesday Swing (instead of Wed Day).<ul><li>Final decision on this will be made on Monday</li><li>Shift Leaders have been notified that their shifts are cancelled through Tuesday OWL shift.</li><li>Tuesday DAY shift personnel should com!
 e in as planned. The Tuesday DAY shift leader is free to arriv!
 e at noon if he would prefer.</li></ul></li></ul><p>Additional details in sub-section notes below.</p><h1><span id="Run_Plan_for_When_Beam_Returns_.28Tuesday_Evening_or_Wednesday.29" class="mw-headline">Run Plan for When Beam Returns (Tuesday Evening or Wednesday)</span></h1><ul><li>Take BBCal cosmics data <em>with magnets on</em> to get HV settings established</li><li>Beam restoration to the Hall<ul><li><em>Start with Sieve IN or OUT?</em></li><li>Ensure target is OUT</li><li>GEM HVs OFF</li><li>SBS, BB OFF</li><li>All other systems should be ready to go</li></ul></li><li>After initial steer-up into Hall is complete<ul><li>Verify beam profile with Harp scans</li><li>Ramp BB and SBS to production currents</li><li>Determine raster size and position on target</li></ul></li><li>Low current GEM runs (?)<ul><li>1 uA on LH2</li><li>Take ____ 5 min long runs with different GEM HV settings for quick voltage scan (needs details)</li><li>Take 1 30 min long run with the all GEMs at st!
 andard voltages to support track reconstruction checkout</li></ul></li><li>Move to Production Running cycle<ul><li>[UPDATE ME]</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="nofollow">https://misportal.jlab.org/mis/physics/shiftSchedule/?experimentRunId=GMn-2021</a><ul><li><strong>Several open TO positions starting Nov 24</strong></li><li>John Arrington's Tuesday Swing shift is marked 'Trade Requested', but he's been confirmed.</li><li>Shift Leaders have been notified that their shifts are cancelled through Tuesday OWL shift (during config change)</li><li>Tuesday DAY shift personnel should come in as planned. The Tuesday DAY shift leader is free to arrive at noon if he would prefer.</li></ul></li></ul><h1><span id="Reminders_.2F_Notes" class="mw-headline">Reminders / Notes</span></h1><ul><li>Role sharing between SL and TO was discussed<ul><li>TO sho!
 uld support the SL wherever possible while still keeping primary focus !
 on the target<ul><li>Beam Time accounting; Shift Checklist tasks are low-hanging fruit</li><li>Suggestion is to have TO start/stop runs and maintain the Run Log spreadsheet?</li></ul></li></ul></li></ul><ul><li>Run plan communication / documentation will be 'officially' documented on the <a title="Daily Meetings" href="https://sbs.jlab.org/wiki/index.php/Daily_Meetings#RC_Meetings">Daily_Meetings#RC_Meetings</a>page<ul><li>Don has made the Run Coordinator 'Run Plan / Report' page more visible on the wiki (and nicely formatted it)</li></ul></li></ul><h1><span id="Subsystem_Updates" class="mw-headline">Subsystem Updates</span></h1><ul><li>HCal:<ul><li>HCAL timing plots are being updated/corrected</li><li>Will turn off HVs Sunday evening in anticipation Monday's reconfiguration work</li><li>Working on clustering</li></ul></li></ul><ul><li>BBCal:<ul><li>New HV settings made for upcoming BB/SBS on/off settings<ul><li>Contact BBCal experts to load these if/when needed</li></ul></!
 li><li>Corrected BBCal - HCal timing plots (histogram definition errors in prior plots, now fixed)<ul><li>plots make more sense, but more clean-up cuts would likely help -- work continues</li></ul></li><li>working on cluster optimization (algorithm modifications in analyzer)</li><li>Provokar is out of town in the near future (Arun, Sebastian,Scott are taking over)<ul><li>Has been working on a number of 'how-to' scripts for experts (Arun, Sebastian, etc)</li></ul></li></ul></li></ul><ul><li>Timing hodoscope:<ul><li>working on RF alignment</li><li>HV instructions for hodoscope are in the wiki (and also re-posted to halog)</li></ul></li></ul><ul><li>Grinch:<ul><li>Study of LED data taken under different BB+SBS conditions underway</li><li>Maria/Todd/Bradley will be taking some more opportunistic LED pulser data through the weekend</li></ul></li></ul><ul><li>GEMS:<ul><li>GEM HV scan using cosmics will be worked on over the weekend<ul><li>Xinzhan will make a log entry outlining w!
 ork done and a todo list</li></ul></li><li>Likely still a good idea to !
 do a (quick) 'voltage scan' with beam as well. Details TBD<ul><li>This will be a GEM-expert driven program.</li></ul></li><li>Work continues on calibrating/understanding the new GEM layer</li></ul></li></ul><ul><li>Beamline:<ul><li>indications that the 'clock' rate used to compute rates from scaler data in each scaler crate (SBS, LHRS) need to be checked<ul><li>Clock value in analyzer likely off by a little in at least one arm</li><li>David F will go down into the Hall and explicitly measure the rates</li><li>Resolved: Clock signal rates measured here: <a class="external free" href="https://logbooks.jlab.org/entry/3946822" rel="nofollow">https://logbooks.jlab.org/entry/3946822</a></li></ul></li><li>David F is looking at scaler sanity checks with Paul</li></ul></li></ul><ul><li>DAQ:<ul><li>General DAQ stability?<ul><li>Frequent crashes at end of run</li><li>New runs frequently do not start successfully and require cycles of reset/config/reset</li><li>Maybe VTP library?</li><!
 li>Alex will make a plan for Monday/Tuesday</li></ul></li><li>Alex reports that the LHRS scalers are not gated by the Trigger Supervisor -- will look into it<ul><li>Bob M. and David F. have responded and will be taking care of this [Fixed, thanks Bob]</li><li><a class="external text" href="https://logbooks.jlab.org/entry/3947699" rel="nofollow">L-HRS scaler gate tied to trigger supervisor (TS) now</a></li></ul></li><li>ET system issues/status<ul><li>Part of the run-start hangs?</li><li>New CODA software ready for roll-out from DA?</li></ul></li></ul></li></ul><ul><li>Replay analysis:<ul><li>GEM work is ongoing</li><li>Eric working on end-of-run report file output along with Dave F.</li></ul></li></ul><ul><li>Counting House Computer requests [Ole?]<ul><li>Streamline access to common tools (halog, go_* scripts, etc)<ul><li>Get them in a common bin/ directory and added to $PATH?</li></ul></li><li>Firefox configurations differ quite a bit depending on user/host<ul><li>Update co!
 mmon configuration to improve useful bookmark toolbar links</li><li>hal!
 og, elog, SBS wiki, Shift crew help, etc</li><li>'New' tabs default to something useful, etc</li></ul></li></ul></li></ul>

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