Star-tpc-l mailing list

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

Hi Flemming:

Unfortunately, the low number of hits in sector 24, RDO 4 is

back again starting with run 25289050 for the rest of day 289.

In the few runs I have looked at in today's data (290), the

problem seems to have gone away.

Thanks,

Lanny

---

From: videbaek <videbaek AT bnl.gov>
Sent: Tuesday, October 15, 2024 1:18 PM
To: Star-tpc L <Star-tpc-l AT lists.bnl.gov>; Ray, Robert L <ray AT physics.utexas.edu>
Subject: Re: sector 24 RDO 4 issues.

 

Hi
Tonko pointed out that current runs don't have this problem. So I went
back at looked at the TPC offline QA
and see clearly that the issues on sector 24 itpc 4 RDO was present over
many daya
first bad run 283030 last bad run 285046  since 286003 all good.

The most peculiar is that nothing special is reported in the elog from
last bad to first good
=no pedestal, no power cycling, no reboot on DAQ.

-single beam run 285047
-blue beam dumped 22:43 10/11
-Run 25286001 - setRHICClock  00:15 10/12
- Run 25286002 - emc-check and 56*56 injected
- run 25286003 Au-Au  good run

Was anything done to tpc's during this time? Can one check in log
messages for tpc?


best Flemming



On 2024-10-11 17:03, videbaek wrote:
> In the fast offline QA Lanny pointed out that it seems sector 4 has
> fewer hits and this has been the case since Monday.
> After today’s QA-meeting I got a root file with all the  the
> information with various information and looked at
> 1) charge per pad/row
> 2)cluster charge per pad/row
> I focused on row 39 which has two region from rdo 3 and rdo 4. From
> physics point of view they should have same #hits and charge per pad ,
> in average.
> The file is from run 25283030 in FastOffline,
>
> The attached file has some additional comments , discussions, and plots
>
> Thanks to Gene for providing the complete QA root file.
>
> best Flemming

--
Flemming Videbaek
senior scientist, emeritus
videbaek @ bnl.gov
Brookhaven National Lab
Physics Department
Bldg 510D
Upton, NY 11973

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