Star-tpc-l mailing list

[Frank Geurts <geurts AT rice.edu>]

Hi Yuri,

I am referring to these particular comment that was made in the PR and which 
appears to indicate that the CorrZ option removes the OSectorAlign chain 
option that implements a TPC distortion correction. That may be 
unintentional, but should  be corrected unless there is an explanation.

What may be confusing is that it doesn't explicitly pop up in the PR as a 
change, but for CorrX, CorrY this chain option is included, while for the new 
CorrZ it is explicitly removed (see line 1142 of  
StRoot/StBFChain/BigFullChain.h)



-Frank






________________________________________________________________________
Frank Geurts   (he/him)
Professor of Physics & Astronomy • Rice University, Houston TX
 T.W. Bonner Nucl. Lab.          • Dept. of Physics & Astronomy
 office 713-348-5314             • web 
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________________________________________________________________________

> On Sep 12, 2024, at 7:34 PM, Fisyak, Yuri V <fisyak AT bnl.gov> wrote:
> 
> Hi Frank, can you more specific on your question ? I did not remove 
> anything.
> In https://drupal.star.bnl.gov/STAR/system/files/TPC24c.Export.Mini_.pdf  I 
> have not found a statement matching to your question.
> I have discuss alignment schema on the management meeting 
> https://drupal.star.bnl.gov/STAR/system/files/Tpc%20Alignment%202024.pdf 
> and there are some references in this talk.
> Mathias in his presentation on the last analysis meeting 
> (https://drupal.star.bnl.gov/STAR/system/files/AnalysisMeetingMathiasLabonte.pdf)
>  on Slide 18
> made a statement that the electric field direction is sector depended.  
> This is the new alignment schema. 
>                                                               Yuri Fisyak
> 
> STAR                                           Phone: +1 631 344 3913
> Brookhaven National Laboratory  Fax:    +1 631 344 4206
> 510A/1-161
> http://www.star.bnl.gov/~fisyak       E-mail: fisyak AT bnl.gov
>    From: Frank Geurts <geurts AT rice.edu>
> Date: Thursday, September 12, 2024 at 7:44 PM
> To: Witt, Richard CIV USNA Annapolis <witt AT usna.edu>, Fisyak, Yuri V 
> <fisyak AT bnl.gov>
> Cc: Star-tpc L <Star-tpc-l AT lists.bnl.gov>
> Subject: Re: [[Star-tpc-l] ] Status of PR for New Alignment Library Code
> Thank you Richard. 
>  I have one specific question to Yuri about the removal of the TPC 
> distortion scheme (addressing E-field distortions  caused by misaligned TPC 
> sectors). From the PDF file that accompanied your PR, it is not clear why 
> this has been removed. Can you explain? 
>   -Frank
>   
> 
> On Sep 12, 2024, at 12:00 PM, Richard Witt (via star-tpc-l Mailing List) 
> <star-tpc-l AT lists.bnl.gov> wrote:
>  Dear All,
>    In response to a request from Frank at today’s TPC meeting, here is a 
> short summary of the status of the ongoing work to incorporate the new TPC 
> alignment for the FXT production.
>  == The next step toward production for the FXT is the processing of a 
> sample for dE/dx calibration.
>  == A new library, incorporating the new alignment has been produced.
>  == The S&C group must approve that library before production of the 
> calibration sample can proceed.
>  == The S&C group needs approval of the changes made in response to the 
> current pull request associated with the new alignment code before they can 
> approve the the library for use in the calibration production.
>  ==  Due to the number of comments submitted on the PR, it is unclear to 
> the TPC group what further work is needed to receive such approval or even 
> what form that approval takes since the code will not be merged when the PR 
> is resolved (to avoid undesired effects in producing older data sets).
>  ==  The TPC group, therefore, requests a path to approval of the changes 
> made for the PR be defined so we can proceed with requesting S&C approval 
> and subsequently produce a dE/dx calibration sample using the new library.
>  Best Regards,
>   Richard 
>  Sent from my iPad
> -- 
> "Education is the most powerful weapon which you can use to change
> the world."
> 
> --Nelson Mandela
> 
> ~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~
>  Richard Witt, Professor of Physics     Phone (USNA): 410-293-6675
>     United States Naval Academy         Email: witt AT usna.edu
> ~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~~~***~