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  • From: Richard Witt <witt AT usna.edu>
  • To: Frank Geurts <geurts AT rice.edu>
  • Cc: Star-tpc L <Star-tpc-l AT lists.bnl.gov>
  • Subject: Re: [Star-tpc-l] TPC Meeting Minutes
  • Date: Thu, 13 Jul 2023 13:06:58 -0400

Hi Frank,

Thanks for your rapid response to this issue in the minutes! Yuri would have to provide the details of his pending request(s), but I am happy to serve as an additional approver. Please let me know what's required to get that done.

Cheers,
Richard

On 7/13/23 13:03, Frank Geurts wrote:
Hi,

Please let me know what particular PRs are taking long. At this time, I see
only one listed that is pending one reviewer.

My understanding is that additional reviewers can always be added, so for
TPC-related work it would be fine to include Richard.

-Frank




______________________________________________________
Frank Geurts (he/him)
Professor of Physics & Astronomy • Rice University, Houston TX
T.W. Bonner Nucl. Lab. • Dept. of Physics & Astronomy
office 713-348-5314 • web https://urldefense.com/v3/__http://heavyions.rice.edu__;!!P4SdNyxKAPE!FsWvSfth9iYxdG9wb_QtDJxFYsKWNrcWSEWxWw0gXQsf2RuPq5IX7OdDwX9-YDQmEwZAAROGwXFun9POYlRP$
On Jul 13, 2023, at 11:55 AM, Richard Witt via Star-tpc-l
<star-tpc-l AT lists.bnl.gov> wrote:


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

== Hardware
— email came from power supply company, they received PO
— will start to build spare PS (~1 month)
— new 6-pack of methane
— DV seems to be coming back to normal
— have about 40 days of gas
— trying to understand why some 6-packs are “bad” (affect DV) and others are
okay
— Alexei trying to compare with reference gas from a small bottle he has
— has located a gas chromatography group at the lab and will ask about doing
comparison work


== Electronics
— system is behaving well with low intensity beams
— full system has been included for about 2 weeks
— with saturated minbias ZDC rate is ~13 kHz
— can record at ~4.2 kHz in those conditions

== Software
— Gene wants to look for distortions due to increase in gated grid rate
— SC & GL for d+Au 200 is a high priority for working groups
— Babu is currently very busy with thesis work but can likely wrap-up soon
— other priority is AuAu 17.3 GeV calibrations
— Gene started on it yesterday, through one iteration so far
— hope is to finish in next few days
— will then do calibration production for dE/dx and bToF
— Run 22 pp500 is the other activity for calibrations
— Richard from Temple is getting started there
— Flemming mention the beam line into STAR has moved by a couple millimeters
in past few days
— Gene will look at impacts from that
— Irakli is continuing alignment work
— results using DAQ file and event files are different
— DAQ files are not ordered by event number but event files are
— Yuri does not find significant differences when reading event files in same
order as events were collected (order in DAQ file)
— Tommy estimated SC from files
— also compared PV reconstruction from east and west individually, there is a
difference
— plots are attached to previous TPC meeting agenda
— Yuri believes the result is an overestimated efficiency
— may be a reproduction of 2019 and 2020 FXT, Gene may try to reproduce the
calibration to remove the problem
— problem will still exist in P21ib
— Gene will look into comparing with work previously done by Irakli
— if there is a difference we may need to include the correction for the
reproduction
— Yuri still looking into combined PID


== AOB
— Pull requests from Yuri and others are taking extremely long to be approved
due to requiring two independent approvers
— TPC group will request that either Richard W. be added as an approver for
pull requests on TPC software, or the requirement be reduced to one approver
— Richard will follow-up with Frank on this

Best Regards,
Richard

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

--Nelson Mandela

~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~
Richard Witt, Professor of Physics Phone (USNA): 410-293-6675
United States Naval Academy Email: witt AT usna.edu
~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~
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--
"Education is the most powerful weapon which you can use to change
the world."

--Nelson Mandela

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





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