Star-fst-l mailing list

["Visser, Gerard" <gvisser AT indiana.edu>]

Hi Gavin,

(Adding fst list... this should be on list I think)

I don't see plots at all for 25121031, something's wrong. But I haven't seen any other runs plots show more than a tiny dribble of statistics in FST. [But I haven't checked all runs, naturally.]

I think it would be rather unwise to switch out of 9 timebin without having at least  one run with reasonable hit statistics in FST. What's the motivation to switch to 3 today?

I just talked to SL and there should be an opportunity coming up. I ask for clarification here if the FST group really thinks it should be switched back now/asap or if we should do it tomorrow.

Sincerely,

           Gerard

---

From: Gavin Wilks <gavin.wilks AT gmail.com>
Sent: Tuesday, April 30, 2024 2:30 PM
To: Visser, Gerard <gvisser AT indiana.edu>
Cc: Jeffery M. Landgraf <jml AT bnl.gov>; Tonko Ljubicic <tonko AT bnl.gov>; Ziyue Zhang <zzhan70 AT uic.edu>
Subject: Re: [Star-ops-l] FST Time Bin Switch (for Latency Adjustment)

 

Hello Gerard, 

I looked at run 25121031 and the APV tb plots appeared to all be centered at the central tb. However, you are correct that the statistics could be better. We could wait for higher statistics, but I am unsure when we will have higher FST rates. 

Ziyue plans to do another set of shifts once we swap back to 3 tb as well.

Best,

Gavin

On Apr 30, 2024, at 14:19, Visser, Gerard <gvisser AT indiana.edu> wrote:

hi Gavin,

      Which is the good reference run from FST 9 tb operation? I've been looking up some runs in shiftlog but haven't yet found one that shows FST really working well and with reasonable statistics on the plots, in 9 tb mode. I presume you have seen such a run though or you wouldn't yet be planning to switch back to 3 tb. Please clarify, thanks,

            Gerard

---

From: Gavin Wilks <gavin.wilks AT gmail.com>
Sent: Tuesday, April 30, 2024 11:14 AM
To: Visser, Gerard <gvisser AT indiana.edu>
Cc: Jeffery M. Landgraf <jml AT bnl.gov>; Tonko Ljubicic <tonko AT bnl.gov>; Ziyue Zhang <zzhan70 AT uic.edu>
Subject: Re: [Star-ops-l] FST Time Bin Switch (for Latency Adjustment)

 

Hello Gerard,

I think the plan is to have beam fill around 2-3pm. So that time should work. 

We can wait until we have a stable fill for less uncertainty as you said. 

Best,

Gavin

On Apr 30, 2024, at 10:59, Visser, Gerard <gvisser AT indiana.edu> wrote:

Hi Gavin,

     Off the list at least for the moment. When do they plan to inject? I see this probably could have been accomplished atarting shortly after 10 but not sure about right now. I have an 11AM meeting for another project anyway, although if this was just the right time I could probably skip it I am not presenting.

     We can also (maybe better because of less uncertainty) do this after a fill is established, just leaving FST out of runs, If that's reasonable I suggest we plan for 2:00 today?

        Gerard

---

From: Gavin Wilks <gavin.wilks AT gmail.com>
Sent: Tuesday, April 30, 2024 10:34 AM
To: STAR experiment operations mailing list <star-ops-l AT lists.bnl.gov>
Cc: Visser, Gerard <gvisser AT indiana.edu>; Jeffery M. Landgraf <jml AT bnl.gov>; Tonko Ljubicic <tonko AT bnl.gov>; Ziyue Zhang <zzhan70 AT uic.edu>
Subject: Re: [Star-ops-l] FST Time Bin Switch (for Latency Adjustment)

 

Dear Gerard, Tonko, Jeff and on duty shift crews,

We would like to switch from 9 to 3 time bin mode on the FST for final commissioning with your help.

The procedure goes as follows:
1. Download 3-tb firmware -> by Gerard
2. Change the dead time accordingly, TCD fixed busy in the run control GUI -> by Tonko/Jeff
3. Change the Online plots -> by Jeff (and maybe the FST expert)
4. Power cycle the FST -> The FST expert will inform the shift crew in the 24hr zoom
5. Change FST config files -> by the FST expert
6. Take a pedestal run -> by the FST expert
7. Wait until the beam comes, then check the latency with 3tb. -> by the Expert

We shall coordinate under this thread.

Gerard, could we coordinate on point 1 at your earliest convenience? I will turn the FST crates on for you through the expert GUI.

Best,
Gavin


> On Apr 19, 2024, at 22:49, Ziyue Zhang via Star-ops-l <star-ops-l AT lists.bnl.gov> wrote:
> 
> Dear Gerard, Tonko, Jeff and on duty shift crews,
> 
> We'd like to switch from 3 to 9 time bin mode temporarily on the FST for the commissioning with your help.
> 
> The procedure goes as follows:
> 1. Download 9-tb firmware -> by Gerard
> 2. Power cycle the FST -> The FST expert will inform the shift crew in the 24hr zoom
> 3. Change FST config files -> by the FST expert
> 4. Change the Online plots -> by Jeff (and maybe the FST expert)
> 5. Change the dead time accordingly, TCD fixed busy in the run control GUI -> by Tonko
> 6. Take a pedestal run -> by the FST expert
> 7. Take one FST pedAsPhys run to see if DAQ can handle the high rate. -> by FST expert and shift crews - 24hr zoom
> 8. Wait until the beam comes, then check the latency with 9tb. -> by the Expert
> Please note that step 7 might need to be repeated in step 8 after beam comes.
> 
> We shall coordinate under this thread.
> 
> Gerard, could you initiate this sequence whenever you are free to do so? 
> 
> Best,
> Ziyue
> 
> 
> 
> 
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