Star-fst-l mailing list

[Tonko Ljubicic <tonko AT bnl.gov>]

Hi Xu, all,

this is done -- from now on FST will use the STAR system default of ~1/100.
Note that the events with the ADC will be in the "adc" stream, as per Jeff's
setup (or so I hope).

         -- Tonko

On Sun, Dec 19, 2021 at 7:26 PM Xu Sun <sunxuhit AT gmail.com> wrote:
>
> Hi Tonko,
>
> As discussed in today's meeting, I am done with the ADC timing adjustment 
> and we should be good to set the ratio to 1:100.
>
> Best,
>
> Xu
>
> On Sun, Dec 19, 2021 at 4:14 AM Tonko Ljubicic <tonko AT bnl.gov> wrote:
>>
>> Hello,
>>
>> I had a few private emails with Xu so we left it at 1:5 for yesterday
>> but right now we are again dominated by FSTs data volume
>> (deadtime 35% at 1300 Hz) so I will cut it down to 1:20
>> and then to 1:100 e.g. tomorrow.
>>
>> IMHO, we should set the steps still needed before we switch to
>> 4 timebin readout.
>>
>>            -- Tonko
>>
>>
>>
>> On Fri, Dec 17, 2021 at 9:12 PM Xu Sun <sunxuhit AT gmail.com> wrote:
>> >
>> > Hi Tonko, All,
>> >
>> > We should have enough non-zs data, switching back to 1 to 100 should be 
>> > fine for us.
>> >
>> > Best,
>> >
>> > Xu
>> >
>> > On Fri, Dec 17, 2021 at 9:29 AM Visser, Gerard <gvisser AT indiana.edu> 
>> > wrote:
>> >>
>> >> I see no reason to have so much non-ZS. If a test run needs more e.g. 
>> >> to check the ADC timing, it can be changed for one run and then put 
>> >> back. But this even is probably not necessary.
>> >>
>> >>       Gerard
>> >>
>> >> ________________________________
>> >> From: Star-fst-l <star-fst-l-bounces AT lists.bnl.gov> on behalf of 
>> >> Aschenauer Elke-Caroline <elke AT bnl.gov>
>> >> Sent: Friday, December 17, 2021 9:25 AM
>> >> To: Tonko Ljubicic <tonko AT bnl.gov>
>> >> Cc: Star-fst L <star-fst-l AT lists.bnl.gov>
>> >> Subject: Re: [Star-fst-l] FST deadtime and raw events in the data stream
>> >>
>> >> As we are planning to get up in lumi, we need to change this, so the 
>> >> FST group should think what they need and why
>> >>
>> >> Cheers elke
>> >>
>> >> On Dec 17, 2021, at 09:15, Tonko Ljubicic <tonko AT bnl.gov> wrote:
>> >>
>> >> Hello,
>> >>
>> >> from the runs last night you can notice that FST
>> >> runs at 1.2 kHz with ~40% deadtime.
>> >>
>> >> This is currently all due to the large number of non-zero-suppressed,
>> >> raw, events, currently 1 in 5.
>> >>
>> >> If we plan to at least approximate the TPC (and we plan more
>> >> eventually) right now I propose we drop this enhanced
>> >> raw data percentage to 1 in 20 or even to the usual 1 in ~100.
>> >> I can't imagine why you would need so many of them but
>> >> it's not my call.
>> >>
>> >> Let me know what you think,
>> >>
>> >>       -- Tonko
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