Star-tpc-l mailing list

[Richard Witt <witt AT usna.edu>]

Present: Alexei, Mathias, Jim, Emmy, Yuri, Flemming, Gene, and myself

== Hardware

— plan is for Yuri to meet with Alexei this week or next (due to illness)

— continuing to run gas system recovery

— preparing for measurements locating TPC relative to magnet support

— many precautions now needed for work in hall

— should start TPC location measurement work next week

— discussions have been initiated regarding how to remove the TPC from the magnet

— no shorted rings to worry about from previous run

== Electronics

— Tonko and Tim working on west side

— found several bad cables (some can be changed)

— possible that run may start in early March (rather than late)

— current proposed end date for run is October of 2025 (or later?)

== Software

— BES-II data Au+Au 19 GeV collision data is now a priority

— some calibration done using new alignment

— event.root files exist if Yuri want to examine

— 19.6 GeV Au+Au from 2019 is also a priority

— Gene started SC calibration for that

— some portion has different RICH scalars

— ran calibration with dev and with new alignment (SL24)

— no noticeable difference in SC calibration result

— good news for BES-II work

— Run 22 p+p 500 may also be good with regard to SC even if we use new alignment

— Mathias looking at several comparisons between TFG24e and the new alignment test production

— has requested a small embedding production for study

— Emmy looked at delta-m/m vs <Z> with and without tracks that cross the central membrane 

— now have 1/pt dependences and eta dependence

— eta plot shows interesting difference in structure between positive and negative eta

— Gene did an additional study using h-/h+ and got a beautiful correlation with Emmy’s results

— comparing the studies suggest that Emmy is seeing alignment artifacts

— allows the possibility of a new method of correction for distortions due to sector alignment 

— should also look at newer data and understand how the new alignment impacts the work

— Yuri working on dE/dx calibration sample 

— cluster is very slow at present 

— some runs have fluctuating voltage (average is down by ~300 V)

— new KFParticle release (TFG24f)

— Maxim did some clean-up on the code

— some interfaces changed

— also added some indications in KFParticle finder

— added projections to cylinder

— also has new STKFParticleAnalysisMaker

— plans is to reintroduce header files (remove VC files)

== AOB

— Flemming added Emmy to the TPC 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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