STAR QA Board

[Geary Eppley <eppley@rice.edu>]

HF & Bulkcorr QA reps:

The vertex Vx vs Vy plot doesn't look physical. Can the beam really do  
that? Do you understand why your plot looks so different than L4 for  
that period? Your central distribution is an order of magnitude more  
compact than the L4 plot.

Is your result consistent with the mean vertex position Gene sent out?  
What plot and analysis chain does Gene use? What analysis chain do you  
use? Is there a Vx vs Vy plot in Fast offline? If there a Vz VPD-TPC  
plot in fast offline?

Could you plot Vz VPD-TPC for just the central Vx vs Vy distribution?

-Geary


Re: Re: [STAR-QAboard] QA Board Meeting December 24

Date    12/24/2021 (10:51:06 PM CST)
From    Ting Lin <tinglin@sdu.edu.cn>
To      geary eppley <eppley@rice.edu>
text/plain Text (3 KB)
Hi Geary:

We found this issue from offline QA by HF and Bulkcorr group.

You can see the slide 3 from HF group by Yingzhou and Kaifeng below:
https://drupal.star.bnl.gov/STAR/system/files/1225_HF_QA_pp500_0.pdf

Also slide 3 from Bulkcorr group by Ashish:
https://drupal.star.bnl.gov/STAR/system/files/Bulkcorr_pp_500GeV_QA_week1_new.pdf

Best,
Ting



Ting Lin tinglin at sdu.edu.cn
Fri Dec 24 13:17:40 EST 2021
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Hi all:

A brief minutes for today's meeting:
https://drupal.star.bnl.gov/STAR/comp/qa/pwg-qa/run-22-qa

For Run-22 offline QA:

> From Lanny Ray:
1. Offline QA software get stuck this morning.
2. Run 22355023 – 22357011 have excessive hits in various RDOs. Tonko  
power cycled the TPX FEE’s and that seems to have fixed the issue.  
This will very likely to affect the track quality. Need to check with  
TPC expert if we want to mark these as bad or not.
3. Mean dE/dx has been slowly decreasing since the first run  
e.g.22349015 with MIP at 2.4 keV/cm, which continued on days 351 &  
352, but then reduced to more normal values (2.2 keV/cm) on day 353 to  
the present. Also need to check with expert about the real reason if  
it happen again.

> From pwg:
1. Most of the problematic runs have been identified by offline QA  
shift, also noted in the shift-log.
2. Vz – vpdVz distribution is shifted by about 5cm.
3. Vr shifted during the last few runs in day 356.

      BulkCorr (Ashish)
      LF (Chenliang)
      HF (Yingjie, Kaifeng)
      JetCorr (Tong)
      ColdQCD (Bassam): .

Best,
Ting