STAR Protected

SpaceCharge EastWest Symmetry

This is meant to provide a simple document for understanding through basic principles of electromagnetism how the TPC SpaceCharge distortion is symmetric on the east and west sides of the TPC.

TPC QA 2021

This blog is intended to maintain a log of issues that will be identified as the
run progresses. For initial start the process will be as for run20 and 19. See earlier QA blog page

K* Rho00 results comparison 200 GeV Run-11

 We will compare the K* analysis step by step:

Our codes at:

/gpfs01/star/pwg/subhash/Public/Kstar_Comparison

January 5

  • RAW to MuDst production
    • pp500_production_2017 (physics)
      392608 files have been converted out of 654286
      Around 60% Completion

January

 

2021

 

TPC weekly

2021-01-06 15:00
America/New York
Wednesday, 6 January 2021
virtual , at 20:00 (GMT), duration : 00:00
 agenda
-- hardware
-- software



 
 
Topic: TPC weekly
Time: Jan 6, 2021 03:00 PM Eastern Time (US and Canada)
 
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TimeTalkPresenter
15:00TPC Distortions (progress report) ( 00:20 ) 1 fileYuri Fisyak
15:20Alignment Update ( 00:20 ) 1 fileIrakli

2020

Meetings 2020

Bluejeans "STAR cold QCD / spin PWG meeting"

December 29

  • RAW to MuDst production
    • pp500_production_2017 (physics)
      391054 files have been converted out of 654286
      Around 60% Completion

December 22

  • RAW to MuDst production
    • pp500_production_2017 (physics)
      389582 files have been converted out of 654286
      Around 60% Completion

FST QC meeting

2020-12-23 09:00
America/New York
Wednesday, 23 December 2020
virtual , at 14:00 (GMT), duration : 00:00
 

Internal review of QC process and current status

 

Recommendation from review

 

An internal review of the procedures and implementation of the QC plans and documentation should be performed after the first 10% of the production is complete before further expensive and sparse parts (sensors and asics!) are committed.

 

The brief review should present

 

1)     Demonstrate implementation of e-log

Take 2 cases

a)     One of the prototype that was populated and tested (03,/04) Try to grade it with the current requirements as we know they were successfully populated and running

 

b)  Take of the currently produced modules that were send to UIC (9-12) and show the grading

 

2)     Present a summary of grading for the 09- now modules for each of the sub-grading quantities  (outer, inner, different fastnesses, DR). Explain how the weighted grading is done.

 

3)     Present  what went wrong with the rejected ones (overflow glue,..) and what that implies for further production

 

Charge to review:

 

Is the QC documentation sufficient?

Does the QC documentation in the assembly document (V3) reflect what is done now?

Should the summary contain some of the sub grading?

Is there a need for any change in procedures, or QC measures?

 

.

 

 



 
 
Topic: FST - QC meeting
Time: Dec 23, 2020 09:00 AM Eastern Time (US and Canada)
 
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tpc weekly

2020-12-16 15:00
America/New York
Wednesday, 16 December 2020
virtual , at 20:00 (GMT), duration : 00:00
 agenda
-- hardware
-- software


Minutes

TPC weekly meeting

 

Hardware;  Alexei excused. Is working on laser and gas system

 

The GG driver modules have been installed (Christian, as Tim is out) One module does not provide HV. There are two spare modules.

David is communicating with Tonko how best to provide the SC for the Gating Grid.

 

Software

Irakli had at LBNL meeting; provided an update to me after meeting

 

“I talked to Yuri last week about progress and the calculation of the distortions.

 

I also pointed out to him a little problem in the reading of the inner sector position parameters from the database. We reached out to Dimitry and he changed the readout for that table. It hopefully was not affecting anything, but now I have a good way to compare apples to apples as far as the inner sector position parameters are concerned.

 

While doing so I noticed that that is where a huge shift in z direction originates, so now I want to see if that is the right result or an artifact from what I've been saying – one can end up in a local minima for the alignment procedure. I will keep you guys updated I the days to come. I am running these jobs as fast as possible (Dmitry's fix has been applied only Monday).”

 

Yuri presented some intermedial results on his investigations of showing effect of his modified equations as discussed in the previous meeting 12/9/2020 that also have the documents

https://www.star.bnl.gov/~fisyak/star/Tpc/Distortions/

 

Unless there are updates we need to discuss in person this was the last TPC meeting for 2020. Please send updates to the mailing list until then 1/5/2021


zoom info
Flemming Videbaek is inviting you to a scheduled ZoomGov meeting.
 
Topic: TPC weekly
Time: Dec 16, 2020 03:00 PM Eastern Time (US and Canada)
 
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December 15

  • RAW to MuDst production
    • pp500_production_2017 (physics)
      388055 files have been converted out of 654286
      Around 60% Completion

TPC weekly

2020-12-09 15:00
America/New York
Wednesday, 9 December 2020
zoom meeting, at 20:00 (GMT), duration : 00:00
 
Agenda:
-hardware status
- software
--- alignment progress 
--- https://drupal.star.bnl.gov/STAR/system/files/he34embedding4th.pdf
--- AOB

minutes

TPC meeting minutes  December 9, 2020

 

Hardware:

Alexei is done with laser maintenance on West side; waiting for etof re-install to be complete on East (done)).

Bob and Tonko finishing the work on Westside, which will close first. One more slicing to be done Wed. Still 5 splicing to be done on East side 

 

Irakli have reported to Yuri he is revisiting the alignment (inner-outer) from the cosmics.

 

Yue-Hang gave update on 3He eff . Guannan had looked at effect on RMS ped in Sl10k in embedding and see no effect. In never libraries the RMSX cut look ok excepts for eta~0 . 

At eta ~0 there may be other issues- as seen for other particles. Yuri points out there may be influence of prompt there |z| > 135, though issues are seen at up to ~20cm (??) from readout chambers.

 

Yuri reported on work on space charge correction and reports there could be a difference between East and West corrections. It is work in progress. Initial report is posted on meeting page, as well as some note by Jim Thomas from ALICE work on this subject.

 

  


 
 
Topic: TPC weekly
Time: Dec 9, 2020 03:00 PM Eastern Time (US and Canada)
 
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TimeTalkPresenter
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December 8

  • RAW to MuDst production
    • pp500_production_2017 (physics)
      386585 files have been converted out of 654286
      Around 59% Completion

December 1

  • RAW to MuDst production
    • pp500_production_2017 (physics)
      384172 files have been converted out of 654286
      Around 59% Completion

December

 

Cold QCD/ Spin PWG Meeting

2020-12-02 19:00
America/New York
Thursday, 3 December 2020
https://drupal.star.bnl.gov/STAR/pwg/spin/weekly-pwg-meetings, at 00:00 (GMT), duration : 00:00

Cold QCD/ Spin PWG Meeting

2020-12-09 19:00
America/New York
Thursday, 10 December 2020
https://drupal.star.bnl.gov/STAR/pwg/spin/weekly-pwg-meetings, at 00:00 (GMT), duration : 00:00

Cold QCD/ Spin PWG Meeting

2020-12-16 19:00
America/New York
Thursday, 17 December 2020
https://drupal.star.bnl.gov/STAR/pwg/spin/weekly-pwg-meetings, at 00:00 (GMT), duration : 00:00