Star-tpc-l mailing list

[Richard Witt <witt AT usna.edu>]

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

== Hardware

— TPC gas system recovery is proceeding

— still working on ToF gas system (may be some small leaks)

— participating in discussion for removal of TPC from magnet

== Electronics

— Tonko says about 40% of TPC electronics have been repaired

— by Dec. 10th should be ready to close both pole tips

— Tim and Tonko have a running log of repairs where one can follow status

== Software

— 19.6 GeV AuAu SC calibration has been finished and included in the dB

— tested running calibration running with and without new alignment

— SC calibration was identical either way

— implies integrated effect of alignment over all of TPC has negligible impact on SC calibration (at least at low luminosity)

— started calibration production for BToF and dE/dx for 19.6 AuAu

— some files ready for examination

— P24iy_calib production

— RCF wrt TFG24e HLT average 

— RCF has a factor of ~2 more events than HLT. 3p85GeV_fixedTarget_2019 (~40k) 

— statistics has to be increased by a factor of 4.

— a bug found in Db entries for TpcAvgPowerSupply tables (~100 entries per Run, ~5% of statistics). 

— Averaging has been done for whole run time period, however, sometimes the TPC anode Voltage decreased before run was stopped.  The averaging bug has been corrected.  

— Flemming and Alexei have asked for sample occurrences with timestamps to understand exactly what’s happened.

— dE/dx calibration has started. There is significant (~2%) difference with respect to HLT calibration.

    — Collider data (19 GeV) with new alignment shows the same trend as seen with fixed target data 

— K0s width has reduced from 7.21 to 6.75 Mev (~7%) and signal to background ratio increased 0.38 to 0.41 (~9%)

  — Yuri is working on speeding up of MDF errors calculations. 

— TFG24f release with the latest Maksym Zyzak update of KFParticle and StKFParticleAnalysisMaker has been built

— TFG24g release with Yuri’s updates to StKFParticleAnalysisMaker is coming.

== AOB

— No meeting next week (Thanksgiving)

— R. Witt will not be able to attend the following week (Dec. 5th), will rejoin Dec. 12th 

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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