STAR QA Board

[videbaek <videbaek@bnl.gov>]

Hi
in particular Gene and Lanny for the issue 3 run 052056
Do you have any QA plots that show if this is a time dependent (seq no) 
issue or not.
It might be worthwhile to check. It does look thatitdisapeared after the 
the run was initialized.

best




On 2022-02-25 13:06, Ting Lin via STAR-QAboard-l wrote:
> 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:
> Single run issue:
>   1. Run 23049049 decreased number of hits in mid-section of Sector 8, 
> RDO 7
>   2. Run 23052056 iTPC sector 13, number of hits very low; ADCs low.
>   3. Run 23053023 st_fwd and st_physics data streams, the dE/dx mean
> is much too high and the ionization energy band resolution is very
> poor.
>   4. Run 23055041, Run with problematic Scalar. Gene investigated and
> determined that the absence of RICH scalers in the first part of this
> run prevented TPC distortion corrections from being calculated and
> caused those st_physics files analyzed by fastoffline QA to fail. The
> files used for st_fwd QA did have RICH scalers and produced normal QA
> histograms. These QA analyzed files were taken at about 1000 s into
> the run.  Gene recommends that the first part of this run, without
> RICH scaler information, be marked BAD, but the rest are good.
>
> Some general issues:
>    Tracking:
>       Starting last week the QA shift crew (Leszek) noticed that the
> distribution of the number of primary tracks was starting to decrease.
> Gene constructed a plot showing the trends. This plot confirms
> Leszek’s observation. The degradation in primary track yield appears
> in MB, HT and st_fwd XX trigger groups in the QA (see QA issue 18109).
>
>    Vertex Z:
>       Primary vertex z-distribution: We checked the fast-offline QA
> for the dip in PV distributions at z=0 and found that it goes back as
> far as the QA is still available, about 2 weeks to 20 days. It appears
> in MB, HT and XX. The MB case was hard to recognize because the usual
> st_physics stream has very few triggers and PVs in the plots.
>       We note that the global track DCA distributions are broad (from
> -200 to +200 cm) and peaked near z = 0 as expected, even when the PV
> distributions dip at z=0.
>       Interestingly yesterday’s runs 23055064, 065 with very low
> ZDC/EPD rates, where sTGC settings were being tested, show normal
> looking PV distributions.
>
> From different PWG groups:
>    1. 23050020-> is laser run, after loss beam. Not any thing physics.
>    2. Continue to see strange multi-peak Vz distributions; located at
> +-50cm. Also see this from the hlt monitor trigger. Need to ask
> experts about the real issues.
>    3. We see TPC Vz - VPD Vz = 10cm from HF with 45cm vertex cut; TPC
> Vz - VPD Vz = 5cm from BulkCorr without vertex cut.
>
> Best,
> Ting
>
> > -----Original Messages-----
> > From: "Ting Lin" <tinglin@sdu.edu.cn>
> > Sent Time: 2022-02-24 16:26:37 (Thursday)
> > To: "star-qaboard-l@lists.bnl.gov" <star-qaboard-l@lists.bnl.gov>
> > Cc:
> > Subject: QA Board Meeting Feb. 25
> >
> > Hi all:
> >
> > We will have a QA board meeting on Friday at noon BNL time, 
> > https://drupal.star.bnl.gov/STAR/comp/qa/pwg-qa/run-22-qa
> >
> > If you have slides to show, please link to the meeting page (in below 
> > link) or send it to me.
> > https://drupal.star.bnl.gov/STAR/event/2022/02/25/QA-Board-Meeting
> >
> > Join ZoomGov Meeting:
> > https://urldefense.com/v3/__https://bnl.zoomgov.com/j/1618435669?pwd=L3B6M3JKcjRFMVFxQTNhaEdBdkZ5UT09__;!!P4SdNyxKAPE!Ua8K6sAQcwo75WM_dnXIW61jfKy68xgkqQVJtZvu22BXzYYEjElCgdWOnKmKr6GjSI3F0tLdzmQ$
> > Meeting ID: 161 843 5669
> > Passcode: 194299
> >
> > Thanks.
> > Ting
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--
Flemming Videbaek
senior scientist
videbaek @ bnl.gov
Brookhaven National Lab
Physics Department
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Upton, NY 11973

phone: 631-344-4106
cell     :  631-681-1596