sPHENIX cold QCD topical group

[Alexander Bazilevsky <shura AT bnl.gov>]

    Ok, good. 
    ... I hope "MBD noVTX" is equivalent to "MBD_NS" (just a straight
    coincidence without any other conditions), isn't it?
    Sasha.

On 4/26/24 2:47 PM, Itaru Nakagawa via sPHENIX-cold-QCD-l wrote:

Hi Ralf and Sasha,

 I've forgotten about the fact that there is no LL1 in ZDC in sPHENIX. So there will be no neither ZDC wide nor narrow. So following is what we have for sPHENIX.

Regards,

-itaru

On 2024/04/25 22:21, Itaru Nakagawa via sPHENIX-cold-QCD-l wrote:

Thanks Ralf, Sasha

 I will check with trigger experts if ZDC wide has any vertex cut.  If it does include vertex cut, then the list will be as follows for now. We can add other triggers later as they becomes available.

Regards,

-itaru

On 2024/04/25 20:13, Ralf Seidl via sPHENIX-cold-QCD-l wrote:

        Hi
          Itaru and Sasha, 
          
          I agree it would be good to have coincidence triggers without
          vertex conditions in them. If the ZDC wide still has a cut,
          maybe we can indeed add a novertex one as well. If I
          understand Martin correctly we have 16 bits available, so
          adding this one trigger might be useful. I fully agree on the
          other triggers you mention. 
          
          Additionally, it might be good to add other triggers, such as
          from the calorimters, for testing. But I think those triggers
          are still in development, so that might be more important at a
          later point in the run. Also, whenever Chi provides the SMD
          scalers we would of course want to have those
          Up/down/left/right x N/S instead, right? 
          
          Cheers, 
          
          Ralf 
          
          On 2024-04-26 06:46, Alexander Bazilevsky via
          sPHENIX-cold-QCD-l wrote: 
> Hi Itaru, 
>             
>             Does ZDC_wide have any (even very wide) vertex cut? - If we
>             want to 
>             use one-side ZDC scalers to correct rel. lum. for pile-up
>             there should 
>             be the ZDC coincidence scaler without vertex cut (as we have
>             for MBD). 
>             
>             ... I remember in PHENIX the wide vertex cut was something
>             like 150cm, 
>             and I don't remember why we didn't use "novertex" instead. 
>             
>             Sasha. 
>             
>             On 4/25/24 3:06 PM, Itaru Nakagawa via sPHENIX-cold-QCD-l
>             wrote: 
>             
> > Hi All, 
> >               
> >               Here is the list of GL1p triggers. Let me know if there is
> >               any 
> >               other trigger missing or your preference in the order.
> >               Then I'll ask 
> >               Martin to map the GL1p triggers to follow this order. 
> >               
> >               https://wiki.sphenix.bnl.gov/index.php/GL1p_trigger_mapping
> >               
> >               
> >               Best regards, 
> >               
> >               -itaru 
> >               
> >               On 2024/04/16 19:25, Ralf Seidl wrote: 
> >               Hi Sasha, all, 
> >               
> >               yes we definitely should also include the singles as that
> >               should 
> >               help us understand pile-up even thought at 200 GeV that is
> >               less of a 
> >               problem. I think we mentioned this to Martin and they
> >               should be also 
> >               included. 
> >               When I was last at BNL in March I think he mentioned that
> >               Joe had 
> >               already prepared the GL1p scalers in the second/testing
> >               daq setup 
> >               and that it only needed to be copied over to the main
> >               setup. Maybe 
> >               we should check up with him. 
> >               Apart from the singles we did of course identify also the
> >               narrow and 
> >               wide coincidence triggers from both detectors. I agree
> >               with Sasha 
> >               that around 10cm for the narrow version of the MBD should
> >               be good. 
> >               
> >               Cheers, 
> >               
> >               Ralf 
> >               
> >               On 2024-04-17 06:45, Alexander Bazilevsky wrote: 
> >               Yes, that what we used in PHENIX, and we can do the same
> >               for MBD/ZDC 
> >               
> >               in sPHENIX. We only have to decide what vertex cut to use
> >               in BBC_vtx 
> >               
> >               and ZDC_narrow. For BBC_vtx it may be +/-10cm (or whatever
> >               is 
> >               considered as MB trigger in sPHENIX), for ZDC such a
> >               narrow cut may 
> >               be 
> >               meaningless, as its vertex resolution is of the order of
> >               10cm (if I 
> >               remember correctly); we may put e.g. +/30cm which with
> >               cross angle 
> >               running will be almost equivalent to ZDC_wide. 
> >               
> >               Do we plan to include one-side triggers, as we discussed
> >               at one of 
> >               the 
> >               Cold QCD meeting? 
> >               
> >               Sasha. 
> >               
> >               On 4/16/24 5:12 PM, Riedl, Caroline wrote: 
> >               
> >               Have we chosen which triggers we want to include in the
> >               switchyard 
> >               for the GL1p scalers? In PHENIX, there was BBC no vtx, BBC
> >               vtx, ZDC 
> >               wide, ZDC narrow. I was thinking we could have something
> >               similar 
> >               with MBD and ZDC, if possible. If we haven't chosen yet,
> >               we should 
> >               do this soon and communicate with Martin what we would
> >               like. 
> >               
> >               -- 
> >               Alexander Bazilevsky 
> >               Brookhaven National Laboratory, Bldg. 510D, 2-232 
> >               Upton, NY 11973 Tel: 631-344-3712 
> >               Email: shura AT bnl.gov
> >               
> >               ------------------------------------------------- 
> >             
>             
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>             
>             -- 
>             Alexander Bazilevsky 
>             Brookhaven National Laboratory, Bldg. 510D, 2-232 
>             Upton, NY 11973 Tel: 631-344-3712 
>             Email: shura AT bnl.gov
>             
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-- 
Alexander Bazilevsky
Brookhaven National Laboratory, Bldg. 510D, 2-232
Upton, NY 11973 Tel: 631-344-3712
Email: shura AT bnl.gov
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