STAR QA Board

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

Hi Gene and Flemming:

Thanks for the explanation. I think what happens is that on rare occasions

the boundary between different colors in the root plot happens to coincide

with the reduced yield in this part of the sector which causes it to show up visually.

Usually, we don't see any changes in the color across this narrow region but

this time we did.

Lanny

---

From: Van Buren, Gene <gene@bnl.gov>
Sent: Saturday, May 22, 2021 10:36 PM
To: Videbaek, Flemming <videbaek@bnl.gov>
Cc: Frank Geurts <geurts@rice.edu>; Ray, Robert L <ray@physics.utexas.edu>; Frank Geurts via STAR-QAboard-l <star-qaboard-l@lists.bnl.gov>
Subject: Re: [STAR-QAboard] ** different time ** QA meeting, tomorrow at 3h30 pm

 

Hi, Flemming

I've been seeing issues with these rows since 2004 or earlier I believe it to be an issue with the anode wires there.

https://drupal.star.bnl.gov/STAR/blog/genevb/2009/aug/11/sector-5-anomaly
https://drupal.star.bnl.gov/STAR/blog/genevb/2009/sep/17/sector-5-gains-over-years

-Gene


> On May 22, 2021, at 3:55 PM, videbaek <videbaek@bnl.gov> wrote:
>
> Hi all and in particular Lanny
>
> You brought up the feature that sector 5 in rows ~64,65 seems inefficient in the cluster ADC plot.
> I looked at the runs you mentioned and indeed already in ADC value the signal is reduced.
> It has taken some digging, but looking back 1.5 years!! I see that I the QA files I have (selected runs only)
> these all have a weak ADC response vs. padrow, and time bin too It has though changed slowly over time
> and in particular since the run that was mentioned Friday more hits /charge show up near the GG timing start.
> I suspect that there are issue developing over time with the ABDB board making the it more pronounced
> developing poor response.I suspect it has possibly been present throughout the life of the outer sector.
>
> I will put together a blog page for next week.
>
> best Flmming
>
>
> On 2021-05-20 12:05, Frank Geurts via STAR-QAboard-l wrote:
>> Dear All,
>> To accomodate those that are attending the SQM2021 conference, we will
>> shift our QA meeting to 3h30pm EDT. This is very late/early for those
>> that attend from timezones in India/China - so please do not feel
>> obliged to do so: only posting your reports to drupal will be fine.
>> Meeting details, including the Zoom link can be found at the following
>> event link:
>> https://drupal.star.bnl.gov/STAR/event/2021/05/21/run-21-qa-board-meeting
>> Best,
>> -Frank
>> Topic: STAR QA Board
>> Time: This is a recurring meeting Meet anytime
>> Join Zoom Meeting
>> https://urldefense.com/v3/__https://riceuniversity.zoom.us/j/95314804042?pwd=ZUtBMzNZM3kwcEU3VDlyRURkN3JxUT09__;!!P4SdNyxKAPE!WKaSoVMpheNPvDWKFd2RFy9I9iWxc-b0ByAasf_IStAXEJDii_uyN5NrF1j4BeOr-Z9Eo22YpbE$
>> Meeting ID: 953 1480 4042
>> Passcode: 2021
>> _______________________________________________
>> STAR-QAboard-l mailing list
>> STAR-QAboard-l@lists.bnl.gov
>> https://lists.bnl.gov/mailman/listinfo/star-qaboard-l
>
> --
> Flemming Videbaek
> senior scientist
> videbaek @ bnl.gov
> Brookhaven National Lab
> Physics Department
> Bldg 510D
> Upton, NY 11973
>
> phone: 631-344-4106
> cell     :  631-681-1596