STAR QA Board

["Ray, Robert L" <ray@physics.utexas.edu>]

Hi Frank, Dan, Gene and Yicheng:

I looked at the 26.5 GeV FXT QA from last night and there is a

significant amount of beam scrapping the lower part of the beam

pipe. This excess background might be causing the unusual timing

I am also seeing in the eTOF and BTOF 1/beta plots, where the bands

are grossly smeared out. Also the number of events with a healthy ratio

of primary/global tracks is extremely low. The previous 26.5 GeV FXT data

looked reasonable as I recall.

Lanny

---

From: STAR-QAboard-l <star-qaboard-l-bounces@lists.bnl.gov> on behalf of Daniel Cebra via STAR-QAboard-l <star-qaboard-l@lists.bnl.gov>
Sent: Friday, July 2, 2021 5:53 PM
To: Benjamin Kimelman <bkimelman@ucdavis.edu>
Cc: Frank Geurts via STAR-QAboard-l <star-qaboard-l@lists.bnl.gov>
Subject: Re: [STAR-QAboard] Run21 QA meeting, tomorrow (Friday) at noon EDT

 

Thanks Ben!

   It is good to have this open issue now solved and closed.

Thanks, Daniel

On Fri, Jul 2, 2021 at 3:14 PM Benjamin Kimelman via STAR-QAboard-l <star-qaboard-l@lists.bnl.gov> wrote:

Hello All,

I wanted to follow up on some of our discussion from this morning's meeting regarding the drop in the pion yield in the 3.85GeV data between days 173 and 174.

I spent some time looking through the code and realized that I was only using the fit function and not the fit result in order to obtain the pion yield. This is a quirk of ROOT where the function itself does not have the same parameter values as the fit result. With this implemented, I reran the QA code for days 172-179, the resulting strip charts can be found here: https://www.star.bnl.gov/protected/lfsupc/bkimel/2021QA/AuAu_3p85GeV_FXT_2021/AuAu_3p85GeV_FXT_2021_days172_179_QA_Monitoring.pdf

On page 6 is the pion yield, which is now completely stable and there is no drop anymore on day 174. This was an artifact of our QA code that has been resolved.

Best,

Ben Kimelman

Ph.D. Candidate, Nuclear Physics Group

UC Davis

He/him/his

On Thu, Jul 1, 2021 at 6:20 PM Frank Geurts via STAR-QAboard-l <star-qaboard-l@lists.bnl.gov> wrote:

Hi,

We will have our Run21 QA meeting tomorrow (Friday) at noon (EST).  Meeting details, including the Zoom link can be found at the following event link:

https://drupal.star.bnl.gov/STAR/event/2021/07/02/run-21-qa-board-meeting

Topic: STAR QA Board

Join Zoom Meeting
https://urldefense.com/v3/__https://riceuniversity.zoom.us/j/95314804042?pwd=ZUtBMzNZM3kwcEU3VDlyRURkN3JxUT09__;!!P4SdNyxKAPE!UQPThnPkadjrVITx2CO3dT4iM5n0JqEpdLMxcq1-S2wRzHPx2UAh_OhxDcW6Z4pTi3xE_BrGFuQ$

Meeting ID: 953 1480 4042
Passcode: 2021


Best,

-Frank





______________________________________________________
Frank Geurts   (he/him/his)
Professor of Physics   • Rice University, Houston TX
T.W. Bonner Nucl. Lab. • Dept. of Physics & Astronomy
office 713-348-5314    • web https://urldefense.com/v3/__http://heavyions.rice.edu__;!!P4SdNyxKAPE!UQPThnPkadjrVITx2CO3dT4iM5n0JqEpdLMxcq1-S2wRzHPx2UAh_OhxDcW6Z4pTi3xEBiz7Qls$


_______________________________________________
STAR-QAboard-l mailing list
STAR-QAboard-l@lists.bnl.gov
https://lists.bnl.gov/mailman/listinfo/star-qaboard-l

_______________________________________________
STAR-QAboard-l mailing list
STAR-QAboard-l@lists.bnl.gov
https://lists.bnl.gov/mailman/listinfo/star-qaboard-l