STAR QA Board

[Benjamin Kimelman <bkimelman@ucdavis.edu>]

Hi Rosi,

I agree. I think many of us were caught unaware of the fact that we were going to collect FXT data. Now that we know it is a possibility during CeC running, I hope we can set the vertexing correct for the future.

Ben Kimelman

Ph.D. Candidate, Nuclear Physics Group

UC Davis

He/him/his

On Thu, Jul 30, 2020 at 8:20 PM Rosi Reed <rosijreed@lehigh.edu> wrote:

Hi Ben,

We could ask Gene to change the settings - and then perhaps have
another small production done in order to give you something to
analyze from the whole data set.  I suppose we will be doing this
again so probably can have the FXT settings loaded for the CeC running
in the future.

Cheers,

Rosi

On Thu, Jul 30, 2020 at 7:52 PM Benjamin Kimelman via STAR-QAboard-l
<star-qaboard-l@lists.bnl.gov> wrote:
>
> Hi QA board,
>
> Yesterday evening we had one run of 26.5GeV FXT data during CeC running. You can look at my QA for that one run here: https://www.star.bnl.gov/protected/lfsupc/bkimel/run20QA/AuAu_26p5GeV_FXT/day211/AuAu_26p5GeV_FXT_run_21211028_QA.pdf
>
> There are a few things I want to point out:
>
> The vertexing algorithm was not adjusted for FXT (I'm guessing that Gene didn't know that we were going to take FXT data and didn't change the algorithm, but I only found out at the end of the run)
> On slides 7&8, the right column shows only tracks that have dE/dx<1. In 2019, we had seen an issue with a large number of tracks having dE/dx<1, which is why these QA plots exist. This seems to be a similar issue, although it appears that the particle bands in dE/dx are very wide. I cannot remember the cause of this, but I will look back through emails to identify that before we meet tomorrow.
> On slide 5, we can see shadow bands in the eToF 1/beta and mass distribution, which shows that it is not properly calibrated.
>
> Ben Kimelman
> Ph.D. Candidate, Nuclear Physics Group
> UC Davis
> He/him/his
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--
Rosi Reed
RHIC/AGS UEC member
Associate Professor, Physics Department
Lehigh University
(610)758-3907
16 Memorial Drive East Office 406
Bethlehem, PA 18015
she/her/hers