Star-tpc-l mailing list

[Richard Witt <witt AT usna.edu>]

Present: Alexei, Gene, Jim, Yuri, Zachary, Tommy, Flemming, Mathias, Prashanth, and myself

== Hardware

— thunderstorm yesterday, almost 3 mbar pressure spike

— gas system behaved very well

== Electronics

— some power problems to RDOs as usual

— tried to fix some yesterday, other are out for the run

— overall, the number out at any given time is more or less stable

— more TPX problems this year than last

— seems most concern is about the power system

== Software

— Run 22 SC

— starting pass 3

— about 247 fills, but calibration only works for about 235

— trying to use calibration from nearby fills for the ones that don’t work

— Starting production with TFG24c

— some problem with long jobs (> 3 days on a file)

— trying to increase statistics to 100 million events

— K0 width looks better in TFG vs most recent production

— may need one or two more weeks depending on speed of processing

— Early QA from production with new alignment (3.2 GeV FXT)

— DCAX and DCY look good 

— double peak structure due to broken tracks is gone

— comparison with embedding also looks very good for low rapidity (not crossing CM)

— some difference for higher eta with CM crossing tracks, but only in DCAY

— nHits distributions also look good between test production and embedding 

— maybe some systematics above eta~2

— perhaps some relation to revised formulation of TPC hit errors in TFG test production?

— PV distribution also shows some differences between test production and P24ia

— can look at mean eta vs PVZ between test and P24ia

== AOB

— Nothing else new reported this week.

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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