Star-tpc-l mailing list

[Richard Witt <witt AT usna.edu>]

Present: Alexei, Gene, Jim, Tommy, Yiding, Irakli, Yuri, and myself

== Hardware

— starting gas next week

— on west side there are a couple RDOs out

— thought to be on DAQ side rather than poletip closure

— was problem during interlock check

— sensor appeared to be malfunctioning on inner field cage air blower

— sensor was verified on bench

— was connected with cable that had been disconnected from global interlock

— report is CAD personnel removed resistor from cable but Alexei will verify

— resistor is crucial to operation

== Electronics

— Nothing new reported this week

== Software

— SC for fixed target in Run 21 3.85 GeV Au+Au

— iterative procedure appears to be converging

— some difficulties particular to fixed target must be overcome (vertex position for example)

— may not be able to do east west SC differential 

— may be an additional T0 correction recalibration after SC is finalized

— Meeting with Temple University has been delayed slightly, forthcoming

— Yuri finishing RDO cleanup for embedding (in ‘20, ‘21)

— due to blocks of runs where RDO outages were apparently not recorded in dB

— changes committed but some iteration needed

— dE/dx calibration in O+O is in progress

— Irakli discusses his work on alignment

— see https://drupal.star.bnl.gov/STAR/blog/iraklic/Run-21-Alignment

— confirmed correct data set was used in plot discussed 2 weeks ago (bottom of page)

— some improvement in pt resolution

— work on study of residuals for new alignment and pre pass should be done by end of day today

— may not need supersector alignment 

== AOB

— Yiding reporting on  pt < 200 GeV tracks in 19.6 GeV (~200M events)

— see talk posted to TPC meeting agenda

— Yuri requested check of 7.7 and 11 GeV data 

— anomalous band should not be present

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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