Star-fst-l mailing list

[Tonko Ljubicic <tonko AT bnl.gov>]

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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