Star-tpc-l mailing list

[Richard Witt <witt AT usna.edu>]

Present: Alexei, Yuri, Tommy, Gene, Jim, Flemming, and myself

== Hardware

— Tim (electrician) will look at Glassman as soon as he returns from vacation

— he was able to fix it last time

— if it cannot be fixed will move to an alternate

— oxygen sensors to be installed later this week

== Electronics

— one RDO changed with spare

— possibly 2 FEEs need to be switched

— should be finished and ready for testing by end of this week

== Software

— sector 18 in run 22

— calorimeter folks took a closer look 

— proportion of hits lost (unmatched) in sector 18 is same as rest of calorimeter

— problem is further up in applied cuts on EMC side

— Run 22 SC (& GL)

— queuing problem at SDCC resulted in production queue jobs (>3 days) being sent to wrong nodes

— now resolved, will see Saturday morning

— differences in running jobs noticed in SC corrections (batch vs. interactive) seems to be due to rounding on different processors (AMD vs. Intel)

— very small (last digits differences)

— about 1/3 of SC jobs hit an assert in tracking code

— tacking code was changed in 2016 to allow skipping over “bad” nodes on a track

— track node quality cut on position with respect to “detector” in which they are found

— track nodes moved off the end of a padrow after distortion corrections are numerous enough that an assert gets thrown by other parts of the tracking chain

— immediate fix is to undo the 2016 change and throw away remaining portion of tracks when they hit a bad node

— Yuri continuing alignment work

— applied new survey with Alexei’s corrections to data from last 5 years

— iterating on that

== AOB

— Richard W needs input for the TPC summary talk at the collaboration meeting

— draft list of topics will be circulated on the list 

Best Regards,

  Richard

Sent from my iPad

-- 
"Education is the most powerful weapon which you can use to change
the world."

--Nelson Mandela

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 Richard Witt, Professor of Physics     Phone (USNA): 410-293-6675
    United States Naval Academy         Email: witt AT usna.edu
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