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[Ross Corliss <rcorliss AT mit.edu>]

The backup plans, as I see it, in order of complexity:

1) Fit a nonlinear interpolation function to the data -- we know, for instance, that a dense charge cloud near the readout will distort all hits, while a dense charge cloud near the CM will only distort z=0 hits, so the linear assumption is not optimal.

2) Revisit pairing the CM data with the digital current data (not inversion, just raw data) to guess where in z the distortion is -- we did not see promising results here, yet, but there is more to look at.

3) Look at time series CM data -- I still think this is in principle promising, but it requires a lot of work to move from the toy model to the real one.

and, orthogonally

A) Lean more on the digital current inversion, as you say. 

On May 10, 2022, at 2:10 PM, Christof Roland <christof.roland AT cern.ch> wrote:

HI Ross, 

one more thing I wanted to ask but forgot in the end. 

If a linear extrapolation of the distortions doesn't work well, what is the plan B?

Is there an option that would inrease CPU needs beyond having to rely more heavily 

on the inversion of the integrated digital currents?

Thanks 

   Christof 

On 10. May 2022, at 17:31, Ross Corliss via sPHENIX-calibration-l <sphenix-calibration-l AT lists.bnl.gov> wrote:

That's fine.  If distortions folks have the stamina, maybe we can talk a little amongst ourselves after the end of that meeting.

-Ross

On May 10, 2022, at 11:11 AM, Sakaguchi, Takao via sPHENIX-calibration-l <sphenix-calibration-l AT lists.bnl.gov> wrote:

Hello Ross and all,

 Christof and I were discussing in a back channel about also moving the executive
meeting to afternoon. How about:

1:00pm~1:30pm: calorimeter part discussion
1:30pm~: TPC part discussion

Cheers,
Takao

On 5/10/2022 11:08 AM, Ross Corliss via sPHENIX-calibration-l wrote:

Yeah, sounds like.

1pm, or is that overly optimistic?

-Ross

==========
Dr. Ross Corliss
Research Assistant Professor
Center for Frontiers in Nuclear Science
Stony Brook University
virtual office:  https://stonybrook.zoom.us/my/rossoffice?pwd=ZmZ2SlRIMVFvUUJwbUkyOVNVTmE5QT09

On May 10, 2022, at 10:56 AM, Anthony Frawley via sPHENIX-calibration-l <sphenix-calibration-l AT lists.bnl.gov> wrote:

Hi Ross,

The 10 am and noon discussions have been moved to 10 am and 11 am (and will likely go long ...). 

Should we reschedule to after lunch?

Tony

From: sPHENIX-calibration-l <sphenix-calibration-l-bounces AT lists.bnl.gov> on behalf of Ross Corliss via sPHENIX-calibration-l <sphenix-calibration-l AT lists.bnl.gov>
Sent: Monday, May 9, 2022 4:04 PM
To: sphenix calibrations <sphenix-calibration-l AT lists.bnl.gov>
Subject: [Sphenix-calibration-l] TPC Distortions Meeting Tomorrow, Tuesday, 11AM EDT

 

Dear Distortions Folks,

The distortion meeting will take place tomorrow, Tuesday, at the usual coordinates and time, 11AM EDT.   I expect this will be when we collect the status of the distortion corrections that we present at the upcoming S&C review, and we will need to keep it short to fit between the 10am and noon discussions.

https://stonybrook.zoom.us/j/94081538941?pwd=Y256N3ptUC9zV2M4cjNtUGgyWnJYdz09

https://indico.bnl.gov/event/15618/

-Ross

==========
Dr. Ross Corliss
Research Assistant Professor
Center for Frontiers in Nuclear Science

Stony Brook University

virtual office:  https://stonybrook.zoom.us/my/rossoffice?pwd=ZmZ2SlRIMVFvUUJwbUkyOVNVTmE5QT09

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