sPHENIX MAPS tracker discussion

[Jakub Kvapil <jakub.kvapil AT cern.ch>]

Dear Martin, Dear Jo,

thanks a lot for all the comments and follow up discussion on zoom.

I am enclosing a second version of the slides.

Thanks

Best regards

Jakub

---

From: Schambach, Jo <schambachjj AT ornl.gov>
Sent: Tuesday, September 26, 2023 9:29 AM
To: purschke AT bnl.gov <purschke AT bnl.gov>; Jakub Kvapil <jakub.kvapil AT cern.ch>; sPHENIX-trigger-l AT lists.bnl.gov <sPHENIX-trigger-l AT lists.bnl.gov>; sphenix-maps-l AT lists.bnl.gov <sphenix-maps-l AT lists.bnl.gov>
Subject: RE: [EXTERNAL] Re: [Sphenix-trigger-l] Slides for TWEPP conference

 

Hi Jakub,
Martin already mentioned most of the issues I had as well.
On the fibers:
We have a trunk cable of 58m length. There is a patch in the DAQ room with 5m length. Then there is a patch from 1E2 to 2E1 with 15m length, and then LC-LC fibers of 3m length, so a total of 81m.

On slide 18, the last 3 dates should probably be 2023, and 2024?

--
Joachim Schambach
Oak Ridge National Laboratory
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Bldg. 6000, MS 6368, Rm 205-C
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Phone: (865) 341-0694
Email: schambachjj AT ornl.gov

-----Original Message-----
From: sPHENIX-trigger-l <sphenix-trigger-l-bounces AT lists.bnl.gov> On Behalf Of Martin Purschke via sPHENIX-trigger-l
Sent: Monday, September 25, 2023 9:26 PM
To: Jakub Kvapil <jakub.kvapil AT cern.ch>; sPHENIX-trigger-l AT lists.bnl.gov; sphenix-maps-l AT lists.bnl.gov
Subject: [EXTERNAL] Re: [Sphenix-trigger-l] Slides for TWEPP conference

Hi Jakub

interesting slides.

Some comments  -

Slide 4:

sPHENIX is definitely higher than 3m...

RHIC has an ~60MHz clock, 56.299 to be exact, and 1/6 of that is the bunch crossing rate. (and yes for the MVTX we provide a 40MHz clock so it feels like at the LHC)

I would leave out the "due to calorimeter limit", 15KHz was the design

The "MVTX and INTT" with the sub-point "Tracking Detectors capable of streamed readout" makes it sound like only those 2 can do it. Not true.
BTW, I always see it called streaming readout - small point.


The annotations you added that label the groups with oHCal/iHCal etc on
Slide 9 make it look like overall there are just 6 such PCs. You have to
get across that this is only a schematic overview.

Again, I know you are using MVTX and INTT, but the TPC is also SRO-capable.

Slide 10 - the thing with the local mode is kinda irrelevant in this
context.

Not sure what to make of the sentence about the busy - it's misleading.
The GL1 maintains a global busy that the GTMs feed into.

You mangled and re-drew the right lower diagram from my slides but made
it wrong. There are 4 LL1 fibers coming in, you draw 6 and say "56".
(And it's 4 Lemos, not 8.) I find what I have in several of my
presentations (I showed you the shift training slides) that explains
what constitutes a "Granule" better and clearer.

Slide 11 -

"stretch the latency down" seems like an odd choice of words.

point 2) JH can correct me, I believe we have 158m trunks + whatever the
patches add, and they are fibers, not cables.

On Sl 14, with "extract the Wupper module", do you mean remove? How will
you configure the unit then w/o PCIe access? (Just curious).

Ok, have fun in Italy!

        Martin


On 9/25/23 19:10, Jakub Kvapil wrote:
> Dear all,
>
> some of you get know during the QM that we have a small R&D project for
> developing FPGA based ML triggering system which demonstrator we plan to > deploy for the pp run at sPHENIX.
> When I was preparing slides, it become obvious that without introducing
> the sPHENIX DAQ and triggering system in more detailed manner, the
> overall talk will not make much sense.
> Thus, we have decided to circulate the slides also within sPHENIX.
>
> Any comments and questions are highly appreciated. I will update the
> coloring to be more uniform later.
> They are for the TWEPP conference - Topical Workshop on electronics for
> particle physics (https://urldefense.us/v2/url?u=https-3A__indico.cern.ch_event_1255624_&d=DwICAg&c=v4IIwRuZAmwupIjowmMWUmLasxPEgYsgNI-O7C4ViYc&r=vJwFlNlBwHwYQvNuLhi0PaY0_599z14u-ahiU0PfpPE&m=iArdP28bKu4FsiEYNp6uXWMihKAeCXGcft4zMlNFF-HSr9HXh54YhaphquCzw672&s=KuneqgCY3PHZ3vuYKZ6wwbe_px_LFWUfDCzvHUlcHns&e= 
> <https://urldefense.us/v2/url?u=https-3A__indico.cern.ch_event_1255624_&d=DwICAg&c=v4IIwRuZAmwupIjowmMWUmLasxPEgYsgNI-O7C4ViYc&r=vJwFlNlBwHwYQvNuLhi0PaY0_599z14u-ahiU0PfpPE&m=iArdP28bKu4FsiEYNp6uXWMihKAeCXGcft4zMlNFF-HSr9HXh54YhaphquCzw672&s=KuneqgCY3PHZ3vuYKZ6wwbe_px_LFWUfDCzvHUlcHns&e= >), thus heavily specialized. The
> time is 16+4.
> Please provide any comments by this Wednesday, as I am flying on Friday
> (sorry for later notice)
>
> Thanks a lot
> Best regards
> Jakub
>


--
Martin L. Purschke, Ph.D.        ;   purschke AT bnl.gov
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