Star-tpc-l mailing list

["Tsang, Chun Yuen" <ctsang AT bnl.gov>]

Hi Richard,

 

My presentation can be found here: https://drupal.star.bnl.gov/STAR/system/files/Tpc%20simulation%20tune%20up%20for%20year%202023.pdf

 

Best wishes,

Tommy

 

From: Star-tpc-l <star-tpc-l-bounces AT lists.bnl.gov> On Behalf Of Richard Witt via Star-tpc-l
Sent: Thursday, April 18, 2024 12:39 PM
To: Star-tpc L <Star-tpc-l AT lists.bnl.gov>
Subject: [Star-tpc-l] TPC Meeting Minutes

 

 

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

 

== Hardware

              — Gas system is more stable now 

                             — watching MTD gas as well, appears to be working now

              — now moving to working on magnet and verifying sensors

              — expecting first collisions around April 23rd-25th

              — drift velocity is roughly flat, trying to get back to ~5.55 cm/us

                             — lasers every 2 hours

 

             

== Electronics

              — Flemming’s dead channel scan was successful

                             — Tonko has list (~7 pads that have always been dead)

              — when poletips were installed there were some problems with various electronics going in and out

                             — maybe test after poletips is installed should be modified?

                             — perhaps test is too short

              — summarized cosmics

                             — for FF have ~15 hours, 30 million triggers (Yuri sees 50 million)

                             — for RFF have ~12 million triggers

                             — zero field has ~9.7 million triggers (~8 million HLT)

                             — fast offline processes all events in all ADC files right now (not limited to 1000)

             

 

== Software

              — Run 22 pp 500 SC

                             — Gene preparing staging for having enough DAQ files for each run to get SC for each run

                                           — in pp500 that’s challenging due to the significantly higher SC (need to have enough good tracks to determine SC)

                                           — developing procedure to determine how many files will be needed to get the needed number of good tracks

                                           — good procedure already developed for finding SC efficiently

                                           — putting the two together, we should be ready for production to find SC 

                             — expecting about 1.5 weeks for each SC pass 

              — Yuri looking at cosmics that have been collected

                             — also watching lasers and drift velocity

              — Tommy finished TpcRs tune-up for 2023 data

                             — Yuri will include as soon as possible

                             — working on fixing spread in ADC and time bucket values in simulation to match data

                                           — simulation currently underestimates both

                             — also working on T0 offset and dE/dx differences between data and simulation

                             — several parameter adjustments have produced much better agreement

                             — final parameters and details available at link below

                                           — https://www.star.bnl.gov/~ctsang/daq_2023AuAu200_TPC23_final                            

 

             

== AOB

              — Nothing 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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