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[Ross Corliss <ross.corliss AT stonybrook.edu>]

Dear Christof et al.,

Thanks for the comments.  The revised draft is posted to the same place:  https://indico.bnl.gov/event/13724/   https://indico.bnl.gov/event/13724/contributions/56788/attachments/39062/64644/TPC.Distortions.Jan.2022.Collab.Meeting.pdf

11: I've revised with Hugo's new graphic, and have tried to reword to get the point on the page that I will say out loud:  Given that we will have limited coverage, we expect that the CM data will be important to the extrapolation of the distortion under the TPOT to the regions outside it.

13:  I've rearranged to try to highlight the need to get this moved forward:   "• Running this through F4A is a central milestone of MDC2 "

"residuals ~50% of original fluctuations" means that,  after static and average are removed,  the estimation of the remaining volumetric distortion from this procedure leads to an RMS of (true distortion-guess) that is about half what you get by guessing 'fluctuation=0" everywhere.  

Likewise, the linear model is that each r,phi,z coordinate is interpolated between the CM and readout.  I've tried to clarify this point, but do you think it will come off okay if I give the explanation of the residuals I will carefully out loud?  It's hard to find a pithy bullet point for this.  I added a backup slide to describe this in more detail.

14:  I removed the note on missing jobs, and have added timeframes to slide 17.

16: rephrased the MDC2 goal.

23: reiterated the MDC2 goal.

==========
Dr. Ross Corliss

If it's work hours, and I'm not in a meeting, feel free to look for me in my virtual office:
https://stonybrook.zoom.us/my/rossoffice?pwd=ZmZ2SlRIMVFvUUJwbUkyOVNVTmE5QT09

On Jan 5, 2022, at 8:42 AM, Christof Roland <christof.roland AT cern.ch> wrote:

Hi Ross, 

i have a few comments on the nice slides you prepared. 

Slide 11. Large acceptance TPOT demonstrated to work, small coverge + central membrane data can help is a bit awkward.

small coverge + central membrane data is all we are going to get, so this is what we must get to work now.

I am not sure we should show the full coverage TPOT strategy anymore, could we prepare a similar 

sketch for the small coverage + central membrane workflow?

Slide 13. Please expand a bit on the code exists but not integrated in F4A. This is a central part of MDC2.

We should mention when this is supposed to be ready and functional to extract a correction map from simulated

laser flashes. 

What does linear model mean?

What does residual ~50% of original fluctuations mean?

Slide 14 Maybe mention here the degree of readiness or ETA of the three boxes. 

Please remove the some missing jobs are okay statement. This kind of thinking has caused more harm 

than good in all heavy ion experiments I know.

Slide 16

The MDC2 Goal is to demonstrate we can derive full correction tables from just looking at distorted "raw"

data (collisions + CM) simulated with a given distortion model. 

MC derived corrections help us to develop and execute the tracking workflow. 

Please state this clearly.

We should also mention that the big challenge we have to overcome is the small acceptance TPOT

+ residuals in the Matrix sets that are unconstrained on the outside. Filling in the azimuthal depenence 

colley base on the CM flashes. Maybe with help from the digital currents. Keeping this vague and implict 

between the lines wont help us much. This is not a review. We need to organize ourselves to get this done. 

Slide 23 

Maybe also state the staged approach to MDC2. Get everything running and tested based on truth derived corrections. 

Replace those as soon as data derived corrections are available. 

Thanks 

    Christof 

On 5. Jan 2022, at 13:39, Ross Corliss via sPHENIX-calibration-l <sphenix-calibration-l AT lists.bnl.gov> wrote:

Dear All,

I've posted draft slides for my talk on Thursday in this week's TPC Calibration indico page:  

https://indico.bnl.gov/event/13724/contributions/56788/attachments/39062/64604/TPC.Distortions.Jan.2022.Collab.Meeting.pdf  

Criticism and comment are most welcome, as always.  There is a great deal of ground to cover.

-Ross

==========
Dr. Ross Corliss

If it's work hours, and I'm not in a meeting, feel free to look for me in my virtual office:
https://stonybrook.zoom.us/my/rossoffice?pwd=ZmZ2SlRIMVFvUUJwbUkyOVNVTmE5QT09

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