sPHENIX tracking discussion

["Osborn, Joe" <osbornjd AT ornl.gov>]

Hi Tony,

 

The plot in question is  just 100 pion events, so yes this will be much worse in AuAu as you say.

 

---------------------------

 

Joe Osborn, Ph.D.

Postdoctoral Research Associate

Oak Ridge National Laboratory

osbornjd AT ornl.gov

(859)-433-8738

 

 

From: Anthony Frawley <afrawley AT fsu.edu>
Date: Saturday, May 15, 2021 at 11:27 AM
To: Osborn, Joe <osbornjd AT ornl.gov>, Huang, Jin <jhuang AT bnl.gov>, Hugo Pereira Da Costa <hugo.pereira-da-costa AT cea.fr>, sphenix-tracking-l AT lists.bnl.gov <sphenix-tracking-l AT lists.bnl.gov>
Subject: [EXTERNAL] Re: [Sphenix-tracking-l] CHEP Slides

Hi Joe,

 

The talk looks good to me.

 

Slide 15: What kinds of events are these? In Au+Au events with pileup the number of Silicon tracklet associations is considerably above 1. This may very well be unavoidable and turn out to be something we have to sort out downstream.

 

Tony

 

---

From: Osborn, Joe <osbornjd AT ornl.gov>
Sent: Saturday, May 15, 2021 7:35 AM
To: Anthony Frawley <afrawley AT fsu.edu>; Huang, Jin <jhuang AT bnl.gov>; Hugo Pereira Da Costa <hugo.pereira-da-costa AT cea.fr>; sphenix-tracking-l AT lists.bnl.gov <sphenix-tracking-l AT lists.bnl.gov>
Subject: Re: [Sphenix-tracking-l] CHEP Slides

 

Hi all,

 

Tony and I have found that the upsilon resolution has slowly degraded since the MDC to something not great, so I rolled back some of the performance plots (the upsilon mass and pT resolution) to that of the MDC. We are looking into the issue with the upsilon resolution. If you have any additional comments please let me know today, otherwise I will post my slides tomorrow night as the organizers request the slides be posted ~24 hours in advance.

 

Joe

 

---------------------------

 

Joe Osborn, Ph.D.

Postdoctoral Research Associate

Oak Ridge National Laboratory

osbornjd AT ornl.gov

(859)-433-8738

 

 

From: sPHENIX-tracking-l <sphenix-tracking-l-bounces AT lists.bnl.gov> on behalf of Osborn, Joe <osbornjd AT ornl.gov>
Date: Tuesday, May 11, 2021 at 11:57 AM
To: Anthony Frawley <afrawley AT fsu.edu>, Huang, Jin <jhuang AT bnl.gov>, Hugo Pereira Da Costa <hugo.pereira-da-costa AT cea.fr>, sphenix-tracking-l AT lists.bnl.gov <sphenix-tracking-l AT lists.bnl.gov>
Subject: Re: [Sphenix-tracking-l] CHEP Slides

Hi all,

 

Thanks for the helpful comments, I believe I have implemented them. Please take a look and let me know if there are any additional comments.

 

One comment is that the current single upsilon mass resolution has degraded to about 100 MeV. I’m not sure if this is because of the ongoing development of the TPC seeder, the TPC cluster issue that Hugo brought up, or something else. But we should probably take a closer look at what is going on there.

 

Joe

 

---------------------------

 

Joe Osborn, Ph.D.

Postdoctoral Research Associate

Oak Ridge National Laboratory

osbornjd AT ornl.gov

(859)-433-8738

 

 

From: sPHENIX-tracking-l <sphenix-tracking-l-bounces AT lists.bnl.gov> on behalf of Anthony Frawley <afrawley AT fsu.edu>
Date: Monday, May 10, 2021 at 2:04 PM
To: Huang, Jin <jhuang AT bnl.gov>, Hugo Pereira Da Costa <hugo.pereira-da-costa AT cea.fr>, sphenix-tracking-l AT lists.bnl.gov <sphenix-tracking-l AT lists.bnl.gov>
Subject: [EXTERNAL] Re: [Sphenix-tracking-l] CHEP Slides

Dear Joe,

 

Quick impressions:

 

For slide 16, we can come up with a better fit. A double crystal ball fit would be best.  Also, more statistics would be good. I can make one with the default tracking chain, if you like.

 

I agree with Jin about the plot on slide 15, move the Y axis labels to the center of the bin.

 

Tony

---

From: sPHENIX-tracking-l <sphenix-tracking-l-bounces AT lists.bnl.gov> on behalf of Huang, Jin <jhuang AT bnl.gov>
Sent: Monday, May 10, 2021 12:47 PM
To: Hugo Pereira Da Costa <hugo.pereira-da-costa AT cea.fr>; sphenix-tracking-l AT lists.bnl.gov <sphenix-tracking-l AT lists.bnl.gov>
Subject: Re: [Sphenix-tracking-l] CHEP Slides

 

Hi Joe

 

Thanks for the nice slides and congratulations again on the plenary talk!

 

Few suggestions which I hope you find useful:

 

• Slide 5: suggest quantify “huge data rate”, which means different thing for different community. Here we could quote Martin’s buffered continuous data rate to SDCC at the last computing review, which is the relevant rate for this talk.
• Slide 6: could use an display to illustrate the occupancy, such as the one attached.
• Slide 8: “Fun4All-sPHENIX code available on Github”: I think here we can highlight our codebase is open sourced and containerized.
• Slide 15: the right hand plot could use some improvement:

• Shift the bin boundary to 0.5s, i.e. remove the ambiguity between neighboring integers.
• The y-axis title is small, so we could highlight on the plot what the yellow band on y=1 means, so reader do not have to draw their own conclusion.

• Slide 16: the Upsilon fit quality is pretty poor, noticeably missing both peak and tail

 

Cheers

 

Jin

 

 

______________________________

 

Jin HUANG

 

Physicist, Ph.D.

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________

 

From: sPHENIX-tracking-l <sphenix-tracking-l-bounces AT lists.bnl.gov> On Behalf Of Hugo Pereira Da Costa
Sent: Monday, May 10, 2021 12:21 PM
To: sphenix-tracking-l AT lists.bnl.gov
Subject: Re: [Sphenix-tracking-l] CHEP Slides

 

Hi Joe,

From a quick look your slides look really nice !

What struck me though: on slide 16, the upsilon inv mass fit is rather poor (in particular there seem to be a flat background component, that does not fit the data at all).

I would try to get a better fit ?

 

On 5/10/21 9:33 AM, Osborn, Joe wrote:

Hi all,

 

Attached is a draft of my slides for CHEP. My talk is next Monday at 11:10 AM EST, and I have a total time slot of 30 minutes so I’ll aim for 25+5. Any comments/suggestions are welcome.

 

Joe Osborn

 

---------------------------

 

Joe Osborn, Ph.D.

Postdoctoral Research Associate

Oak Ridge National Laboratory

osbornjd AT ornl.gov

(859)-433-8738

 

 

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