Star-fst-l mailing list

[Tonko Ljubicic <tonko AT bnl.gov>]

Once we run with full DAQ one can take a pedestal run (pedestal_tcd_only)
at which point  I produce a text file with the means/RMS for all found 
channels.

I did this earlier today so one can find it at (looking from daqman):

/net/fst01/RTScache/pedestals.txt (for the last, canonical one)
/net/fst01/RTScache/FST_pedestals_xxxxx.txt

where xxxxx is the run number e.g. 01107385 today.

Take a look. The format is trivial:

rdo arm apv channel timebin pedestal rms

So someone can make a small script to zip through this looking for
pathology OR comparing the recent run to some "golden" one.

Note that the "pedestals.txt" will be used for subsequent ZS.

             -- Tonko




On Wed, Aug 18, 2021 at 8:37 PM Visser, Gerard <gvisser AT indiana.edu> wrote:
>
> Hopefully it is something external.
> Nothing was touched on any FST cable or support connections between when it 
> was noisy and when it was not? That would be comforting to hear.
>
> I think it may be too soon to rule out an intermittently bad connection in 
> the FST.
>
> Will it be possible to take regularly some biased/dark runs over next few 
> days to watch for changes? That would be optimal I think.
>
>     Gerard
>
>
> ________________________________
> From: Star-fst-l <star-fst-l-bounces AT lists.bnl.gov> on behalf of Xu Sun 
> <sunxuhit AT gmail.com>
> Sent: Wednesday, August 18, 2021 2:31 PM
> To: Aschenauer Elke-Caroline <elke AT bnl.gov>
> Cc: Star-fst L <star-fst-l AT lists.bnl.gov>
> Subject: Re: [Star-fst-l] status
>
> Hi Elke,
>
> Thanks for asking. I am about to send the email.
> As you said, the noise just went away before we did anything.
> The good thing is the detector is working properly but we don't know why it 
> is gone.
>
> It turns out both the module and purple cable are good and there seems to 
> be an unknown source of noise around yesterday.
> We postponed the detector pulling and are trying to identify the possible 
> noise source, but no luck so far.
> If we could find the noise source, we will try to decouple it from our FST.
>
> Best,
>
> Xu
>
> On Wed, Aug 18, 2021 at 2:24 PM Aschenauer Elke-Caroline <elke AT bnl.gov> 
> wrote:
>
> Dear All,
>
> I just did hear your noise is gone, without doing anything.
> Can somebody please elaborate a bit on it.
>
> Thanks elke
>
>
> Note: Please do not feel obligated to respond to this message outside of 
> your work hours.
>
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