STAR QA Board

[Daniel Cebra <cebra@physics.ucdavis.edu>]

Hello QA board,

   I have followed up on item 2 of the "to do" list for the 19.6 GeV Bad Runs list - i.e. I have gone back and checked the 76 runs that Ashik had flagged as bad and looked them up in the Log Book and Run Log Browser. I have attached an excel file which contains an entry for each of these 76 runs and records the minbias events, HLTgood events, and the relevant comments from the Log Book.

   There are a few findings:

1) 38 of the Runs flagged as bad were injection runs - I had thought that these had not been produced?

2) 14 of the flagged runs are short (i.e. <10 minutes). It is not uncommon to flag short runs as bad, but they don't have much data so it is not really an issue.

3) 15 of the flagged runs were good, long data runs for which there were no comments in the log book about why the run might be bad.

4) The remaining 9 runs had a variety of issues that were noted in the log and could explain why the runs were rejected.

   I will follow-up with the 15 long data runs which appear outwardly to be good to try to determine why they were flagged as bad from the run-by-run QA.

Regards, Daniel

On Fri, Oct 29, 2021 at 10:45 AM 林挺 via STAR-QAboard-l <star-qaboard-l@lists.bnl.gov> wrote:

Hi all:

A brief minutes for today's meeting:

https://drupal.star.bnl.gov/STAR/event/2021/10/29/qa-board-meeting

1. 19.6 GeV Run-by-Run QA:

Comments:

1). RunID 450 to 500, the jump in eta/phi plot likely due to the RDO problems during this runing period.
2). At the beginning of the run, the beam is not centered, so there is shift in eta;

Things to do:

1). Compare the bad run-list to those points that outside the normal ranges, see if there is plotting issues;

2). Check the RunLog to find out the possible reasons for the bad runs;

3). Check other variables like Q;

4). Change the tolerance from 5sigma to 3sigma, to check the sensitivity of cuts.

Conclusion: 

Need to do some checks, but the run list after this QA is good enough for centrality.

2. Discussion:

1). Centrality group is fine with using DCA, but will also monitor the sDCA. May change DCA to sDCA after having a good understanding of this variable.

2). Yu Hu will update the code in Github.

3) We are 80% of the way through 14.6 GeV production. 14.6 GeV QA will start ASAP after the data production is done.

4) For FXT run QA, need a few changes eg. need to change RefMult to number of primary tracks, shift vr cuts. Each working group should think about the changes on QA.

Best,

Ting

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Attachment: 19.6 GeV Bad Runs List.xlsx
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